PET2000-12-074RA - BEL POWER SOLUTIONS

PET2000-12-074xA is a 2000 Watt AC to DC, power-factor corrected

(PFC) power supply that converts standard AC power into a main

output of +12 VDC.

PET2000-12-074xA utilizes full digital control architecture for greater

efficiency, control and functionality.

This power supply meets international safety standards and displays

the CE-Mark for the European Low Voltage Directive (LVD).

• Best-in-class, 80 PLUS Certified “Platinum” Efficiency

• Auto-Selected Input Voltage Ranges: 90 - 140 VAC, 180 - 264 VAC

• AC Input with Power Factor Correction

• 2000 W Continuous Output Power Capability

• Always-On 12 V Standby Output

• Hot-Plug Capable

• Parallel Operation with Active Current Sharing

• Full Digital Controls for Improved Performance

• High Density Design: 42.1 W/in3

• Small Form Factor: 265 x 73.5 x 40 mm (10.43 x 2.89 x 1.57 in)

• Power Management Bus Communication Protocol for Control,

Programming

and Monitoring

• Status LED with Fault Signaling

• Networking Switches

• Servers & Routers

• Telecommunications

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Product Family

Power Level

Dash

V1 Output

Dash

Width

Airflow

Input

AC Inlet1

PET Front-Ends

2000 W

12 V

74 mm

N: Normal

R: Reverse

A: AC

Blank: C14

C: C16

A: Saf-D-Grid®

The PET2000-12-074xA AC/DC power supply is a fully DSP controlled, highly efficient front-end power supply. It incorporates

resonance-soft-switching technology to reduce component stresses, providing increased system reliability and very high efficiency.

With a wide input operational voltage range the PET2000-12-074xA maximizes power availability in demanding server, network, and

other high availability applications. The supply is fan cooled and ideally suited for integration with a matching airflow path.

The PFC stage is digitally controlled using a state-of-the-art digital signal processing algorithm to guarantee best efficiency and

unity power factor over a wide operating range.

The DC/DC stage uses soft switching resonant techniques in conjunction with synchronous rectification. An active OR-ing device

on the output ensures no reverse load current and renders the supply ideally suited for operation in redundant power systems.

The always-on standby output provides power to external power distribution and management controllers. It is protected with an

active OR-ing device for maximum reliability.

Status information is provided with a front-panel LED. In addition, the power supply can be controlled and the fan speed set via the

I2C bus. The I2C bus allows full monitoring of the supply, including input and output voltage, current, power, and inside temperatures.

Cooling is managed by a fan controlled by the DSP controller. The fan speed is adjusted automatically depending on the actual

power demand and supply temperature and can be overridden through the I2C bus.

Logic Signals

V1_SENSE

L

Curr

ent

limit

Aux

Converter

GND

V1

VSB

N

PFC

DC

Digital

Primary

Controls

V1_SENSE_RTN

I2C

PWM

Filter

PE

PWM

Communication Bus

A2..0

Digital

Secondary

Controls

EEPROM

Fan

ISHARE

Figure 1. PET2000-12-074xA Block Diagram

Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely affect long-term reliability and

cause permanent damage to the supply.

PARAMETER

CONDITIONS / DESCRIPTION

MIN

MAX

UNITS

Vi maxc

Maximum Input

Continuous

264

VAC

1

C14 = IEC 60320-C14 type, C16 = IEC 60320-C16 type, Saf-D-Grid® = Anderson Saf-D-Grid®

PET2000-12-074xA

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General Condition: TA = 0… 55 °C, unless otherwise noted.

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

Vi nom

Nominal Input Voltage

Rated Voltage High Line (

Vi nom HL

)

200

230

240

VAC

Rated Voltage Low Line (

Vi nom LL

)

100

115

127

VAC

Vi

Input Voltage Ranges

Normal operating (

Vi min HL

to

Vi max HL

), High Line

180

264

VAC

Normal operating (

Vi min LL

to

Vi max LL

), Low Line

90

140

VAC

Ii max

Maximum Input Current

Vi

=100 VAC,

I1

= 83 A,

ISB

= 5 A

13

ARMS

Vi

= 200 VAC,

I1

=167 A,

ISB

= 5 A

12

Vi

= 200 VAC,

I1

= 145 A,

ISB

= 5 A

10

Vi

= 220 VAC,

I1

= 158 A,

ISB

= 5 A

10

Vi

= 230 VAC,

I1

= 167 A,

ISB

= 5 A

10

Ii inrush

Inrush Current Limitation

Vi min

to

Vi max

,

TNTC

= 25°C, 5 ms

10

Ap

fi

Input Frequency

47

50/60

63

Hz

PF

Power Factor

Vi

= 230 VAC, 10% load

0.8

0.880

W/VA

Vi

= 230 VAC, 20% load

0.9

0.950

W/VA

Vi

= 230 VAC, 50% load

0.9

0.997

W/VA

Vi

= 230 VAC, 100% load

0.95

0.999

W/VA

THD

Total Harmonic Distortion

TBD

%

Vi on

Turn-on Input Voltage2

Ramping up

87

90

VAC

Vi off

Turn-off Input Voltage2

Ramping down

82

87

VAC

η

Efficiency3

Vi

= 230 VAC, 10% load

90

91.6

%

Vi

= 230 VAC, 20% load

91

93.8

%

Vi

= 230 VAC, 50% load

94

94.4

%

Vi

= 230 VAC, 100% load

91

92.8

%

TV1 holdup

Hold-up Time

V1

Vi

= 230 VAC, 50% load, 0°

18

ms

Vi

= 230 VAC, 100% load, 0°

9

ms

TVSB holdup

Hold-up Time

VSB

Vi

= 90 to 264 VAC, 0 to 100% load

70

ms

2

The Front-End is provided with a minimum hysteresis of 3 V during turn-on and turn-off within the ranges

3

Efficiency measured without fan power per EPA server guidelines

4.1 INPUT CONNECTOR

PET2000-12-074NA power supply is available in 3 different input connector configurations. The versions with IEC 60320-C14

and IEC 60320-C16 have a limited current of 10 A for areas outside North America, in addition the IEC 60320-C14 has a

limited component temperature of 70°C. The Anderson Saf-D-Grid® has no limitation with respect to both current and

temperature.

The PET2000-12-074NA power supply is available with IEC 60320-C14.

Below table shows the maximum rated operating conditions for the different input connector options. The applied operating

condition must remain within these conditions to allow safety compliant operation.

See also 10.3 MAXIMUM OUTPUT POWER VERSUS INLET TEMPERATURE FOR SAFETY COMPLIANCY for detailed

derating curves.

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TYPE

INPUT CONNECTOR

REGION

APPLIED RATED

MAINS AC VOLTAGE4

MAX

I

5

MAXIMUM

DERATED

I1

AT

MAXIMUM

TA

PET2000-12-074RA

IEC 60320-C14

North America

100 to 127 VAC

83.3 A

50 A at

TA

= 55°C

200 to 240 VAC

167 A

100 A at

TA

= 55°C

Other than

North America

100 to 127 VAC

67 A / 83.3 A

for BSMI

50 A at

TA

= 55°C

200 to 220 VAC

145 A

100 A at

TA

= 55°C

220 to 230 VAC

158 A

100 A at

TA

= 55°C

230 to 240 VAC

167 A

100 A at

TA

= 55°C

PET2000-12-074NA

IEC 60320-C14

North America

100 to 127 VAC

83.3 A

50 A at

TA

= 70°C

200 to 240 VAC

167 A

100 A at

TA

= 70°C

Other than

North America

100 to 127 VAC

67 A / 83.3 A

for BSMI

17.5 A at

TA

= 65°C

200 to 220 VAC

145 A

32.5 A at

TA

= 65°C

220 to 230 VAC

158 A

40 A at

TA

= 65°C

230 to 240 VAC

167 A

43 A at

TA

= 65°C

PET2000-12-074NAC

IEC 60320-C16

North America

100 to 127 VAC

83.3 A

50 A at

TA

= 70°C

200 to 240 VAC

167 A

100 A at

TA

= 70°C

Other than

North America

100 to 127 VAC

67 A / 83.3 A

for BSMI

40 A at

TA

= 70°C

200 to 220 VAC

145 A

87 A at

TA

= 70°C

220 to 230 VAC

158 A

95 A at

TA

= 70°C

230 to 240 VAC

167 A

100 A at

TA

= 70°C

PET2000-12-074NAA

Anderson Saf-D-Grid®

All

100 to 127 VAC

83.3 A

50 A at

TA

= 70°C

200 to 240 VAC

167 A

100 A at

TA

= 70°C

4

Nominal grid voltage, does not include typical fluctuations of ±10%; e.g. listed range 230-240 VAC allows operation

at 230 VAC -10% to 240 VAC +10%, so 207 … 264 VAC actual voltage to account for grid fluctuations

5

Maximum Input current for PET2000-12-074RA at

TA

= 40°C and for PET2000-12-074NAx at

TA

= 55°C

4.2 INPUT FUSE

Time-lag 16 A input fuse (5 x 20 mm) in series with the L-line inside the power supply protects against severe defects.

The fuse is not accessible from the outside and is therefore not a serviceable part.

4.3 INRUSH CURRENT

The AC-DC power supply exhibits an X-capacitance of only 5.9 μF, resulting in a low and short peak current, when the supply

is connected to the mains. The internal bulk capacitor will be charged through an NTC which will limit the inrush current.

NOTE:

Do not repeat plug-in / out operations within a short time, or else the internal in-rush current limiting device (NTC) may not

sufficiently cool down and excessive inrush current or component failure(s) may result.

4.4 INPUT UNDER-VOLTAGE

If the sinusoidal input voltage stays below the input undervoltage lockout threshold Vi on, the supply will be inhibited.

Once the input voltage returns within the normal operating range, the supply will return to normal operation again.

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4.5 POWER FACTOR CORRECTION

Power factor correction (PFC) is achieved by controlling the input current waveform synchronously with the input voltage.

A fully digital controller is implemented giving outstanding PFC results over a wide input voltage and load ranges.

The input current will follow the shape of the input voltage. If for instance the input voltage has a trapezoidal waveform, then

the current will also show a trapezoidal waveform.

4.6 EFFICIENCY

High efficiency (see

Figure 2)

is achieved by using state-of-the-art silicon power devices in conjunction with soft-transition

topologies minimizing switching losses and a full digital control scheme. Synchronous rectifiers on the output reduce the

losses in the high current output path. The speed of the fan is digitally controlled to keep all components at an optimal

operating temperature regardless of the ambient temperature and load conditions.

Figure 2. Efficiency vs. Load current (ratio metric loading)

Figure 3. Power factor vs. Load current

Figure 4. Inrush current, Vi = 230Vac, 90°

CH2: Vi (200V/div), CH3: Ii (5A/div)

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

V1 nom

Nominal Output Voltage

0.5 ∙

I1 nom

,

TA

= 25°C

12.0

VDC

V1 set

Output Setpoint Accuracy

-0.5

+0.5

%

V1 nom

dV1 tot

Static Regulation

Vi min LL

to

Vi max HL

, 0 to 100%

I1 nom

-1

+1

%

V1 nom

P1 nom

Nominal Output Power6

Vi min HL

to

Vi max HL

2000

W

Vi min LL

to

Vi max LL

1000

W

P1 peak

Peak Output Power6

Vi min HL

to

Vi max HL

2100

W

Vi min LL

to

Vi max LL

1320

W

I1 nom

Output Current

Vi min HL

to

Vi max HL

0

167

ADC

I1 nom red

Vi min LL

to

Vi max LL

0

83

ADC

I1 peak

Peak Output Current7

Vi min HL

to

Vi max HL

0

175

ADC

I1 peak red

Vi min LL

to

Vi max LL

0

110

ADC

V1 pp

Output Ripple Voltage8

Vi min LL

to

Vi max HL

, 0 to 75%

I1 nom

,

Cext

= 0 mF

120

mVpp

Vi min LL

to

Vi max HL

, 75 to 100%

I1 nom

,

Cext

= 0 mF

150

mVpp

Vi min LL

to

Vi max HL

, 0 to 100%

I1 nom

,

Cext

≥ 1 mF/Low ESR

120

mVpp

dV1 load

Load Regulation

0 to 100%

I1 nom

-83

-110

-138

mV

dV1 line

Line Regulation

Vi min HL

to

Vi max HL

, 0.5 ∙

I1 nom

-24

0

24

mV

dV1 temp

Thermal Drift

0.5 ∙

I1 nom, TA

= 0 ... 55°C

-0.4

mV/°C

dI1 share

Current Sharing

Difference between individual

I1

,

1 … 8 power supplies in parallel

-6

+6

ADC

VISHARE

Current Share Bus Voltage

VISHARE

at 167A

8

VDC

VISHARE

Current Share Bus Voltage

I1 peak

9.14

VDC

dV1 lt

Load Transient Response

Δ

I

1 = 50%

I1 nom

,

I1

= 5 … 100%

I1 nom

,

Cext

= 0 mF

0.35

0.6

VDC

dV1 lt

Δ

I

1 = 10%

I1 nom

,

I1

= 0 … 10%

I1 nom

,

Cext

= 0 mF

0.35

0.6

VDC

trec

Recovery Time

d

I

1/d

t

= 1A/μs, recovery within 1% of

V1 nom

0.5

1

ms

V1 dyn

Dynamic Load Regulation

Δ

I

1 = 60%

I1 nom

,

I1

= 5 … 167 A,

f

= 50 ... 5000 Hz, Duty cycle = 10 ... 90%,

Cext

= 2 ... 30 mF

11.4

12.6

V

tV1 rise

Output Voltage Rise Time

V1

= 10…90%

V1 nom

,

Cext

< 10 mF

1

30

ms

tV1 ovr sh

Output Turn-on Overshoot

0 to 100%

I1 nom

0.6

V

dV1 sense

Remote Sense

Compensation for cable drop, 0 to 100%

I1 nom

0.25

V

CV1 load

Capacitive Loading

0

30

mF

6

See also chapter TEMPERATURE AND FAN CONTROL

7

Peak combined power for all outputs must not exceed 2100 W; maximum of peak power duration is 20 seconds without asserting

the SMBAlert signal

8

Measured with a 10 uF low ESR capacitor in parallel with a 0.1 uF ceramic capacitor at the point of measurement

5.1 MAIN OUTPUT V1

General Condition: TA = 0…40 °C (PET2000-12-074RA), TA = 0…55 °C (PET2000-12-074NA), Vi = 230 VAC unless otherwise

noted.

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

VSB nom

Nominal Output Voltage

ISB = 0 A

,

TA

= 25°C

12.1

VDC

VSB set

Output Setpoint Accuracy

-1

+1

%V

SBnom

dVSB tot

Total Regulation

Vi min LL

to

Vi max HL

, 0 to 100%

ISB nom

-5

+1

%V

SBnom

PSB nom

Nominal Output Power

Vi min LL

to

Vi max HL

PET2000-12-074RA

PET2000-12-074NA

36

60

W

PSB peak

Peak Output Power8

Vi min LL

to

Vi max HL

PET2000-12-074RA

PET2000-12-074NA

36

60

W

ISB nom

Output Current

Vi min LL

to

Vi max HL

PET2000-12-074RA

PET2000-12-074NA

0

3

5

ADC

ISB peak

Peak Output Current9

Vi min LL

to

Vi max HL

PET2000-12-074RA

PET2000-12-074NA

0

3.3

5.3

ADC

VSB pp

Output Ripple Voltage7

Vi min LL

to

Vi max HL

, 0 to 100%

ISB nom

,

Cext

= 0 mF

120

mVpp

dVSB load

Load Regulation

0 to 100%

ISB nom

PET2000-12-074RA

PET2000-12-074NA

-144

-290

-240

-430

-330

-570

mV

dVSB line

Line Regulation

Vi min HL

to

Vi max HL

,

ISB nom = 0 A

-24

0

24

mV

dVSB temp

Thermal Drift

ISB = 0 A

-0.5

mV/°C

dISB share

Current Sharing

Deviation from

ISB tot

/ N,

ISB

= 0.5 ∙

ISB nom

-1

+1

ADC

VSB dyn

Load Transient Response

Δ

ISB

= 50%

ISB nom

,

ISB

= 5 … 100%

ISB nom

,

d

ISB

/d

t

= 1A/μs, recovery within 1% of

VSB nom

0.2

0.3

VDC

trec

Recovery Time

1

2

ms

VSB dyn

Dynamic Load Regulation

Δ

ISB

= 1A,

ISB

= 0 …

ISB nom

,

f

= 50 ... 5000 Hz,

Duty cycle = 10 ... 90%,

Cext

= 0 ... 5 mF

11.4

12.6

V

tVSB rise

Output Voltage Rise Time

VSB

= 10…90%

VSB nom

,

Cext

< 1 mF

1

2

5

ms

tVSB ovr sh

Output Turn-on Overshoot

0 to 100%

ISB nom

0.6

V

CVSB load

Capacitive Loading

0

3100

μF

Figure 5. Turn-On AC Line 230VAC, full load (200ms/div)

CH1: Vin (400V/div) CH2: PWOK_H (5V/div)

CH3: V1 (2V/div) CH4: VSB (2V/div)

Figure 6. Rise time V1 at 230VAC, full load (2ms/div)

CH3: V1 (2V/div)

9

In single power supply configuration

5.2 STANBY OUTPUT VSB

General Condition: TA = 0…40 °C (PET2000-12-074RA), TA = 0…55 °C (PET2000-12-074NA), Vi = 230 VAC unless otherwise

noted.

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Figure 7. Rise time VSB at 230VAC, full load (2ms/div)

CH4: VSB (2V/div)

Figure 8. Turn-Off AC Line 230VAC, full load (20ms/div)

CH1: Vin (400V/div) CH2: PWOK_H (5V/div)

CH3: V1 (2V/div) CH4: VSB (2V/div)

Figure 9. Turn-Off AC Line 230VAC, half load (20ms/div)

CH1: Vin (400V/div) CH2: PWOK_H (5V/div)

CH3: V1 (2V/div) CH4: VSB (2V/div)

Figure 10. Short circuit on V1 (10ms/div)

CH3: V1 (2V/div) CH4: I1 (100A/div)

Figure 11. Load transient V1, 83 to 167A (500

μ

s/div)

CH3: V1 (200mV/div) CH4: I1 (50A/div)

Figure 12. Load transient V1, 167 to 83A (500

μ

s/div)

CH3: V1 (200mV/div) CH4: I1 (50A/div)

5.3 OUTPUT GROUND / CHASSIS CONNECTION

The output return path serves as power and signal ground. All output voltages and signals are referenced to these pins. To

prevent a shift in signal and voltage levels due to ground wiring voltage drop a low impedance ground plane should be used

as shown in

Figure 13

. Alternatively, separated ground signals can be used as shown in

Figure 14.

In this case the two ground planes should be connected together at the power supplies ground pins.

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

F

Input fuse (L)

Not use accessible, time-lag (T)

16

A

V1 OV

OV Threshold

V1

Over Voltage

V1

Protection, Latch-off Type

13.3

13.9

14.5

VDC

tV1 OV

OV Trip Time

V1

1

ms

VSB OV

OV Threshold

VSB

Over Voltage

V1

Protection, Automatic retry each 1s

13.3

13.9

14.5

VDC

tVSB OV

OV Trip Time

VSB

1

ms

I1 OC Slow

OC Limit

V1

Over Current Limitation, Latch-off,

Vi min HL

to

Vi max HL

169

175

ADC

Over Current Limitation, Latch-off,

Vi min LL

to

Vi max LL

85

88

ADC

tV1 OC Slow

OC Trip time

V1

Over Current Limitation, Latch-off time

20

s

IV1 OC Fast

Fast OC Limit

V1

Fast Over Current Limit., Latch-off,

Vi min HL

to

Vi max HL

176

180

ADC

Fast Over Current Limit., Latch-off,

Vi min LL

to

Vi max LL

110

115

ADC

tV1 OC Fast

Fast OC Trip time

V1

Fast Over Current Limitation, Latch-off time

50

55

60

ms

I1 SC

Max Short Circuit Current

V

1

V1

< 3 V

180

A

tV1 SC

Short Circuit Regulation Time

V1

< 3 V, time until

I1

is limited to <

I1 sc

2

ms

ISB OC

OC Limit

VSB

Over Current Limitation, Constant-Current Type

5.2

7.5

A

tVSB OC

OC Trip time

VSB

Over Current Limit., time until

ISB

is limited to

ISB OC

1

ms

TSD

Over Temperature

See chapter 10.2

°C

NOTE:

Within the power supply the output GND pins are connected to the Chassis, which in turn is connected to the Protective Earth

terminal on the AC inlet. Therefore, it is not possible to set the potential of the output return (GND) to any other than Protective

Earth potential.

Figure 13. Common low impedance ground plane

Figure 14. Separated power and signal ground

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6.1 OVERVOLTAGE PROTECTION

PET2000-12-074xA front-end provides a fixed threshold overvoltage (OV) protection implemented with a HW comparator for

both the main and the standby output. Once an OV condition has been triggered on the main output, the supply will shut down

and latch the fault condition. The latch can be unlocked by disconnecting the supply from the AC mains or by toggling the

PSON_L input. The standby output will continuously try to restart with a 1 s interval after OV condition has occurred.

6.2 UNDERVOLTAGE DETECTION

Both main and standby outputs are monitored. LED and PWOK_H pin signal if the output voltage exceeds ±5% of its

nominal voltage.

The main output will latch off if the main output voltage

V1

falls below 10 V (typically in an overload condition) for more than

55 ms. The latch can be unlocked by disconnecting the supply from the AC mains or by toggling the PSON_L input.

If the standby output leaves its regulation bandwidth for more than 2 ms then the main output is disabled to protect the system.

6.3 CURRENT LIMITATION

MAIN OUTPUT

The main output exhibits a substantially rectangular output characteristic controlled by a software feedback loop. If output

current exceeds

IV1 OC Fast

it will reduce output voltage in order to keep output current at

IV1 OC Fast

. If the output voltage drops

below ~10.0 VDC for more than 55 ms, the output will latch off (standby remains on), see also

Undervoltage Detection.

Figure 15. Current Limitation on V1

at Vi = 90 ... 140

VAC

Figure 16 .Current Limitation on V1

at Vi = 180 … 264

VAC

A second SW controlled current limit will latch off the main output if the power supply is operated for long duration in its peak

current capability region. This protection trips as soon as the output current exceeds

I1 OC Slow

for a duration of more than 20 s.

The third current limitation implemented as a fast hardware circuit will immediately switch off the main output if the output

current increases beyond the peak current trip point, occurring mainly if a short circuit is applied to the output voltage.

The supply will re-start 4 ms later with a soft start, if the short circuit persists (

V1

< 10.0 V for >55 ms) the output will latch off;

otherwise it continuous to operate.

The latch can be unlocked by disconnecting the supply from the AC mains or by toggling the PSON_L input.

The main output current limitation thresholds for

I1 OC Slow

and

I1 OC Fast

depend on the actual input voltage range applied to the

power supply. In addition, the threshold for

I1 OC Slow

is reduced when ambient temperature exceeds 55°C, see

Figure 38

for

PET2000-12-074RA and

Figure 46

for PET2000-12-074NA.

STANDBY OUTPUT

The standby output exhibits a substantially rectangular output characteristic down to 0 V (no hiccup mode / latch off).

The current limitation of the standby output is independent of the AC input voltage.

Running in current limitation causes the output voltage to fall, this will trigger under voltage protection and disables the main

output, see also

Undervoltage Detection.

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

Vi mon

Input RMS Voltage

Vi min LL

≤

Vi

≤

Vi max HL

-3

+3

VAC

Ii mon

Input RMS Current

Ii

> 6.7 Arms

-3

+3

%

Ii

≤ 6.7 Arms

-0.2

+0.2

Arms

Pi mon

True Input Power

Pi

> 500 W

-4

+4

%

50 W <

Pi

≤ 500 W

-20

+20

W

V1 mon

V1 Voltage

-0.1

+0.1

VDC

I1 mon

V1 Current

I1

> 50 A

-1

+1

%

5 A <

I1

≤ 50 A

-0.5

+0.5

ADC

P1 nom

V1 Output Power

Pi

> 1000 W

-1

+1

%

50 W <

Pi

≤ 1000 W

-10

+10

W

VSB mon

VSB Voltage

-0.1

+0.1

VDC

ISB mon

VSB Current

-0.1

+0.1

ADC

TA mon

Inlet Temperature

TA min

≤

TA

≤

TA max

-2

+2

°C

PET2000-12-074RA

PET2000-12-074NA

Figure 17. Current Limitation on VSB

The power supply operating parameters can be accessed through I2C interface. For more details refer to chapter

I2C / POWER MANAGEMENT BUS COMMUNICATION and document URP.00234 (PET Front-End Power Management Bus

Communication Manual).

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

PSON_H / HOTSTANDBYEN_H

VIL

Input Low Level Voltage

PSON_L: Main output enabled

-0.2

0.8

V

HOTSTANDBYEN_H: Hot Standby mode

not allowed

VIH

Input High Level Voltage

PSON_L: Main output disabled

2

3.5

V

HOTSTANDBYEN_H: Hot Standby mode

allowed

IIL,H

Maximum Input Sink or Source Current

VI

= -0.2 V to +3.5 V

-1

1

mA

Rpull up

Internal Pull up Resistor to internal 3.3 V

10

kΩ

RLOW

Maximum external Pull down Resistance

to GND to obtain Low Level

1

kΩ

RHIGH

Minimum external Pull down Resistance

to GND to obtain High Level

50

kΩ

PWOK_H

VOL

Output Low Level Voltage

V1

or

VSB

out of regulation,

VIsink

< 4 mA

0

0.4

V

VOH

Output High Level Voltage

V1

and

VSB

in regulation

, Isource

< 0.5 mA

2.4

3.5

V

Rpull up

Internal Pull up Resistor to internal 3.3 V

1

kΩ

IOL

Maximum Sink Current

VO

< 0.4 V

4

mA

8.1 ELECTRICAL CHARACTERISTICS

8.2 SENSE INPUTS

The main output has sense lines implemented to compensate for voltage drop on load wires in both positive and negative

path. The maximum allowed voltage drop is 200 mV on the positive rail and 50 mV on the GND rail.

With open sense inputs the main output voltage will rise by 270 mV. Therefore, if not used, these inputs should be connected

to the power output and GND at the power supply connector. The sense inputs are protected against short circuit. In this case

the power supply will shut down.

8.3 CURRENT SHARE

The PET front-ends have an active current share scheme implemented for

V1

. All the ISHARE current share pins need to be

interconnected in order to activate the sharing function. If a supply has an internal fault or is not turned on, it will disconnect

its ISHARE pin from the share bus. This will prevent dragging the output down (or up) in such cases.

The current share function uses an analog bus to transmit and receive current share information. The controller implements a

Master/Slave current share function. The power supply providing the largest current among the group is automatically the

Master. The other supplies will operate as Slaves and increase their output current to a value close to the Master by slightly

increasing their output voltage. The voltage increase is limited to +250 mV.

The standby output uses a passive current share method (droop output voltage characteristic).

8.4 PSON_L INPUT

The PSON_L is an internally pulled-up (3.3 V) input signal to enable/disable the main output

V1

of the front-end. With low level

input the main output is enabled. This active-low pin is also used to clear any latched fault condition. The PSON_L can be

either controlled by an open collector device or by a voltage source.

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PSU 1 PDU

PSU 2

3.3V

PSU 1 PDU

PSU 2

3.3V

PSON_L

Figure 18. PSON_L connection

8.5 PWOK_H OUTPUT

The PWOK_H is an open drain output with an internal pull-up to 3.3 V indicating whether both

VSB

and

V1

outputs are within

regulation. This pin is active-high.

An external pull down resistor ensures low level when there is no power supply seated. When combining PWOK_H outputs of

several power supplies, circuits as shown in

Figure 19

should be used.

PSU 1 PDU

PSU 2

3.3V

PWOK_H

3.3V

PWOK_H

PSU PDU

3.3V

>10kΩ

PSU 1 PDU

PSU 2

3.3V

PWOK_H

3.3V

PWOK_H ≥1kΩ

3.3V

>10kΩ

PWOK_H

Figure 19. PWOK_H connection

8.6 HOT-STANDBY IN-/OUTPUT

The hot-standby operation is an operating mode allowing to further increase efficiency at light load conditions in a redundant

power supply system. Under specific conditions one of the power supplies is allowed to disable its DC/DC stage. This will

save the power losses associated with this power supply and at the same time the other power supply will operate in a load

range having a better efficiency. In order to enable the hot standby operation, the HOTSTANDBYEN_H and the ISHARE pins

need to be interconnected between the power supplies. A power supply will only be allowed to enter the hot-standby mode,

when the HOTSTANDBYEN_H pin is high, the load current is low, see

Figure 20

, and the supply was allowed to enter the hot-

standby mode by the system controller via the appropriate I2C command (by default disabled). The system controller needs to

ensure that only one of the power supplies is allowed to enter the hot-standby mode.

If a power supply is in a fault condition, it will pull low its active-high HOTSTANDBYEN_H pin which indicates to the other

power supply that it is not allowed to enter the hot-standby mode or that it needs to return to normal operation should it already

have been in the hot-standby mode.

NOTE:

The system controller needs to ensure that only one of the power supplies is allowed to enter the hot-standby mode.

Figure 21

shows the achievable power loss savings when using the hot-standby mode operation. A total power loss reduction

of approx. 10 W is achievable.

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1 PSU on

2 PSU on

80A37.5A

Total

System

Current

167A

Figure 20. Hot-standby enable/disable current thresholds

Figure 21. PSU power losses with/without hot-standby mode

PSU 1 PSU 2

VSB

CS

HOTSTANDBYEN_H

V1

VSB

CS

HOTSTANDBYEN_H

V1

Figure 22. Recommended hot-standby configuration

8.7 PRESENT_L OUTPUT

The PRESENT_L pin is wired through a 100 Ohms resistor to internal GND within the power supply. This pin does indicate that

there is a power supply present in this system slot. An external pull-up resistor has to be added within the application. Current

into PRESENT_L should not exceed 5 mA to guarantee a low level voltage if power supply is seated.

PSU PDU

PRESENT_L

100Ω

Vext

Figure 23. PRESENT_L connection

8.8 SIGNAL TIMING

AC

Input

VSB

V1

tAC VSB tVSB rise

tV1 rise

tAC V1

tPWOK_H del

tVSB V1 del

PSON_L

PWOK_H

AC

Input

VSB

V1

tV1 holdup

tV1 off

tPWOK_H warn

tAC drop1

tAC drop2

PSON_L

PWOK_H tPWOK_H holdup

Figure 24. AC turn-on timing

Figure 25. AC short dips

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PARAMETER

DESCRIPTION /

CONDITION

MIN

NOM

MAX

UNIT

tAC VSB

AC Line to 90%

VSB

1.5

s

tAC V1

AC Line to 90%

V1

PSON_L = Low

1.5

4 10

s

tVSB V1 del

VSB

to

V1

delay

PSON_L = Low

50

150

1000

ms

tV1 rise

V1

rise time

See chapter

OUTPUT

tVSB rise

VSB

rise time

See chapter

OUTPUT

tAC drop1

AC drop without

V1

leaving regulation

0.5 ∙

I1 nom

,

ISB nom

17

ms

0.7 ∙

I1 nom

,

ISB nom

13

ms

I1 nom

,

ISB nom

5

ms

tAC drop2

AC drop without

VSB

leaving regulation

I1 nom

,

ISB nom

70

ms

tV1 holdup

Loss of AC to

V1

leaving regulation

See chapter

INPUT

tVSB holdup

Loss of AC to

VSB

leaving regulation

See chapter

INPUT

tPWOK_H del

Outputs in regulation to PWOK_H asserted

100

150

200

ms

tPWOK_H warn

Warning time from de-assertion of PWOK_H to

V1

leaving regulation

0.15

ms

tPWOK_H holdup

Loss of AC to PWOK_H de-asserted

Vi nom HL, I1 nom

,

ISB nom

10

ms

tPWOK_H low

Time PWOK_H is kept low after being de-asserted

100

ms

tPSON_L V1 on

Delay PSON_L active to

V1

in regulation

Cext

= 0 mF

5

10

20

ms

tPSON_L V1 off

Delay PSON_L de-asserted to

V1

disabled

2

3

4

ms

tPSON_L PWOK_H

Delay PSON_L de-asserted to PWOK_H de-asserted

1

2

ms

tV1 off

Time

V1

is kept off after leaving regulation

1

s

tVSB off

Time

VSB

is kept off after leaving regulation

1

s

10

At repeated ON-OFF cycles the start-up times may increase by 1s

AC

Input

VSB

V1

tVSB holdup

tV1 holdup

tV1 off

tVSB off

tPWOK_H warn

PSON_L

PWOK_H

tPWOK_H holdup

VSB

AC

Input

V1

PSON_L

PWOK_H

tPSON_L V1 on

tV1 rise

tPWOK_H del

tPSON_L PWOK_H

tPWOK_H warn

tPSON V1 off

tV1 off

tPWOK_H low

Figure 26. AC long dips

Figure 27. PSON_L turn-on/off timing

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OPERATING CONDITION 11

LED SIGNALING

No AC or AC Line in UV condition,

VSB

not present from paralleled power supplies

Off

PSON_L High

Blinking Green 1 Hz

Hot-Standby Mode

No AC or AC Line in UV condition,

VSB

present from paralleled power supplies

Solid Amber

V

1 or

V

SB out of regulation

Over temperature shutdown

Output over voltage shutdown (

V

1 or

V

SB)

Output over current shutdown (

V

1 or

V

SB)

Fan error (>15%)

Over temperature warning

Blinking Amber 1 Hz

Minor fan regulation error (>5%, <15%)

Firmware boot loading in process

Blinking Green 2 Hz

Outputs V1 and VSB in regulation

Solid Green

Table 1. LED Status

11

The order of the criteria in the table corresponds to the testing precedence in the controller

8.9 LED INDICATOR

The front-end has one front LED showing the status of the supply. The LED is bi-colored: green and amber, and indicates AC

and DC power presence and warning or fault conditions.

Table 1

lists the different LED status.

The PET front-end is a communication Slave device only; it never initiates messages on the I2C / SMBus by itself. The

communication bus voltage and timing is defined in

Table 2

and further characterized through:

• The SDA/SCL IOs use 3.3 V logic levels

• External pull-up resistors on SDA/SCL required for

correct signal edges

• Full SMBus clock speed of 100 kbps

• Clock stretching limited to 1 ms

• SCL low time-out of >25 ms with recovery within 10 ms

• Recognizes any time Start/Stop bus conditions

3.3V

Rpull-up

TX

RX

SDA/SCL

3.3V

10kΩ

DSP or EEPROM

TX_EN

Figure 28. Physical layer of communication interface

Communication to the DSP or the EEPROM will be possible as long as the input AC voltage is provided. If no AC is present,

communication to the unit is possible as long as it is connected to a life

VSB

output (provided e.g. by the redundant unit).

If only

V1

is provided, communication is not possible.

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PARAMETER

DESCRIPTION

CONDITION

MIN

MAX

UNIT

SCL / SDA

V

iL

Input low voltage

-0.5

1.0

V

iH

Input high voltage

2.3

3.5

V

hys

Input hysteresis

0.15

V

oL

Output low voltage

3 mA sink current

0

0.4

V

t

r

Rise time for SDA and SCL

20+0.1Cb1

300

ns

t

of

Output fall time ViHmin → ViLmax

10 pF < Cb1 < 400 pF

20+0.1Cb1

250

ns

I

i

Input current SCL/SDA

0.1 VDD < Vi < 0.9 VDD

-10

10

μA

C

i

Internal Capacitance for each SCL/SDA

50

pF

f

SCL

SCL clock frequency

0

100

kHz

R

pull-up

External pull-up resistor

fSCL ≤ 100 kHz

1000 ns / Cb1

Ω

t

HDSTA

Hold time (repeated) START

fSCL ≤ 100 kHz

4.0

μs

t

LOW

Low period of the SCL clock

fSCL ≤ 100 kHz

4.7

μs

t

HIGH

High period of the SCL clock

fSCL ≤ 100 kHz

4.0

μs

t

SUSTA

Setup time for a repeated START

fSCL ≤ 100 kHz

4.7

μs

t

HDDAT

Data hold time

fSCL ≤ 100 kHz

0

3.45

μs

t

SUDAT

Data setup time

fSCL ≤ 100 kHz

250

ns

t

SUSTO

Setup time for STOP condition

fSCL ≤ 100 kHz

4.0

μs

t

BUF

Bus free time between STOP and START

fSCL ≤ 100 kHz

5

ms

1 Cb = Capacitance of bus line in pF, typically in the range of 10…400 pF

Table 2. I2C / SMBus Specification

Figure 29. I2C / SMBus Timing

ADDRESS SELECTION

The address for I2C communication can be configured by pulling address input pins A2, A1 and A0 either to GND

(Logic Low) or leave them open (Logic High). An internal pull up resistor will cause the A2 / A1 / A0 pin to be in High Level if

left open. A fixed addressing offset exists between the Controller and the EEPROM.

tr

tLOW

tHIGH

tLOW

tHDSTA

tSUSTA tHDDAT tSUDAT tSUSTO tBUF

tof

SDA

SCL

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A2

A1

A0

I2C Address12

Controller

EEPROM

0

0xB0

0xA0

0

1

0xB2

0xA2

0

1

0

0xB4

0xA4

0

1

0xB6

0xA6

1

0

0xB8

0xA8

1

0

1

0xBA

0xAA

1

0

0xBC

0xAC

1

0xBE

0xAE

Table 3. Address and protocol encoding

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

SMB_ALERT_L

Vext

Maximum External Pull up Voltage

12

V

IOH

Maximum High Level Leakage Current

No Failure or Warning condition,

VO

= 12 V

10

µA

VOL

Output Low Level Voltage

Failure or Warning condition,

Isink

< 4 mA

0

0.4

V

Rpull up

Internal Pull up Resistor to internal 3.3 V

None

IOL

Maximum Sink Current

VO

< 0.4 V

4

mA

PSU 1 PDU

PSU 2

SMB-

ALERT_L

Vext

SMB-

ALERT_L

Figure 30. SMBALERT_L connection

12

The LSB of the address byte is the R/W bit

9.1 SMBALERT_L OUTPUT

The SMBALERT_L signal indicates that the power supply is experiencing a problem that the system agent should investigate.

This is a logical OR of the Shutdown and Warning events. It is asserted (pulled Low) at Shutdown or Warning events such as

reaching temperature warning/shutdown threshold of critical component, general failure, over-current, over-voltage, under-

voltage or low-speed of a failed fan. This signal may also indicate the power supply is operating in an environment exceeding

the specified limits.

The SMBAlert signal is asserted simultaneously with the LED turning to solid amber or blinking amber.

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9.2 CONTROLLER AND EEPROM ACCESS

The controller and the EEPROM in the power supply share the same I2C bus physical layer (see

Figure 31

) and can be

accessed under different addresses, see ADDRESS SELECTION.

The SDA/SCL lines are connected directly to the controller and EEPROM which are supplied by internal 3.3 V.

The EEPROM provides 256 bytes of user memory. None of the bytes are used for the operation of the power supply.

DSP

EEPROM

SDA

SCL

A2..0

Protection

Address Selection

Figure 31. I2C Bus to DSP and EEPROM

9.3 EEPROM PROTOCOL

The EEPROM follows the industry communication protocols used for this type of device. Even though page write / read

commands are defined, it is recommended to use the single byte write / read commands.

WRITE

The write command follows the “SMBus 1.1 Write Byte Protocol”. After the device address with the write bit cleared, the Two

Byte Data Address is sent followed by the data byte and the STOP condition. A new START condition on the bus should only

occur after 5ms of the last STOP condition to allow the EEPROM to write the data into its memory.

READ

The read command follows the “SMBus 1.1 Read Byte Protocol”. After the device address with the write bit cleared the two

byte data address is sent followed by a repeated start, the device address and the read bit set. The EEPROM will respond with

the data byte at the specified location.

9.4 POWER MANAGEMENT BUS PROTOCOL

The Power Management Bus is an open standard protocol that defines means of communicating with power conversion

and other devices. For more information, please see the System Management Interface Forum web site at:

www.powerSIG.org.

Power Management Bus command codes are not register addresses. They describe a specific command to be executed.

PET2000-12-074xA supply supports the following basic command structures:

• Clock stretching limited to 1 ms

• SCL low time-out of >25 ms with recovery within 10 ms

• Recognized any time Start/Stop bus conditions

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WRITE

The write protocol is the SMBus 1.1 Write Byte/Word protocol. Note that the write protocol may end after the command byte

or after the first data byte (Byte command) or then after sending 2 data bytes (Word command).

In addition, Block write commands are supported with a total maximum length of 255 bytes. See PET2000-12-074xA Power

Management Bus Communication Manual URP.00234 for further information.

READ

The read protocol is the SMBus 1.1 Read Byte/Word protocol. Note that the read protocol may request a single byte or word.

In addition, Block read commands are supported with a total maximum length of 255 bytes. See PET2000-12-074xA Power

Management Bus Communication Manual URP.00234 for further information.

9.5 GRAPHICAL USER INTERFACE

Bel Power Solutions provides with its “I2C Utility” a Windows® XP/Vista/Win7 compatible graphical user interface allowing the

programming and monitoring of the PET2000-12-074xA Front-End.

The utility can be downloaded on: belfuse.com/power-solutions and supports both the PSMI and Power Management Bus

protocols.

The GUI allows automatic discovery of the units connected to the communication bus and will show them in the navigation

tree. In the monitoring view the power supply can be controlled and monitored.

If the GUI is used in conjunction with the YTM.00046 Evaluation Board it is also possible to control the PSON_L pin of the

power supply. Refer to BCG.00809 for YTM.00046 connection and GUI configuration.

S Address W A Command A

Data Low Byte1) A Data High Byte1) A P

1) Optional

S Address W A Command A

Byte 1 A Byte N A P

Byte Count A

S Address W A Command A

Data (Low) Byte AS Address R A Data High Byte1) nA P

1) Optional

S Address W A Command A

Byte 1 A

S Address R A

Byte N nA PByte Count A

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Figure 32. Monitoring dialog of the I2C Utility

10.1 FAN CONTROL

To achieve best cooling results sufficient airflow through the supply must be ensured. Do not block or obstruct the

airflow at the rear of the supply by placing large objects directly at the output connector. The PET2000-12-074RA

is provided with a front to rear airflow, which means the air enters on the AC-inlet side of the supply and leaves at

the DC-output, while the PET2000-12-074NA is provided with a rear to front airflow, which means the air enters

through the DC-output of the supply and leaves at the AC-inlet side, as shown in

Figure 33

.

The PET2000-12-074xA supply has been designed for horizontal operation.

PET2000-12-074RA

PET2000-12-074NA

Figure 33. Airflow direction

Airflow

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Table 4. Temperature sensor location and thresholds

The fan inside the supply is controlled by a microprocessor. The rpm of the fan is adjusted to ensure optimal supply

cooling and is a function of output power. Three different curves are selected based on input voltage and inlet

temperature. With standby output loaded the fan speed minimum is limited to ensure enough cooling of circuits

providing standby power.

Figure 34

illustrates the programmed fan curves.

PET2000-12-074RA

PET2000-12-074NA

Figure 34. Fan speed vs. main output load

10.2 TEMPERATURE MONITOR AND OVER TEMPERATURE PROTECTION

PET2000-12-074xA provides access via I2C to the measured temperatures of in total 6 sensors within the power

supply, see

Table 4

. The microprocessor is monitoring these temperatures and if warning threshold of one of these

sensors is reached it will set fan to maximum speed. If temperatures continue to rise above shut down threshold

the main output

V1

(or

VSB

if auxiliary converter is affected) will be disabled. At the same time the warning or fault

condition is signalized accordingly through LED, PWOK_H and SMBALERT_L.

TEMPERATURE

SENSOR

DESCRIPTION / CONDITION

POWER

MANAGEMENT

BUS REGISTER

WARNING

THRESHOLD

SHUTDOWN

THRESHOLD

PET2000-12-074RA

Inlet Air Temperature

Sensor located on control board close to DC

end of PSU

8Dh

61°C

63°C

Synchronous Rectifier

Sensor located on secondary side of DC/DC

stage

8Eh

105°C

110°C

Primary Heat Sink

Sensor located on primary heat sink

8Fh

96°C

101°C

Output ORing Element

Sensor located close to output

D2h

105°C

110°C

Auxiliary Converter

Sensor located on secondary side on auxiliary

rectifier

D3h

95°C

100°C

Outlet Ambient

Sensor located near output connector

D4h

85°C

90°C

PET2000-12-074NA

Inlet Air Temperature

Sensor located on control board close to DC

end of PSU

8Dh

75°C

78°C

Synchronous Rectifier

Sensor located on secondary side of DC/DC

stage

8Eh

95°C

100°C

Primary Heat Sink

Sensor located on primary heat sink

8Fh

87°C

92°C

Output ORing Element

Sensor located close to output

D2h

100°C

105°C

Auxiliary Converter

Sensor located on secondary side on auxiliary

rectifier

D3h

80°C

85°C

Bridge Rectifier

Sensor located on heat sink for AC rectifier

D4h

86°C

91°C

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10.3 MAXIMUM OUTPUT POWER VERSUS INLET TEMPERATURE FOR SAFETY COMPLIANCY

For safety compliant operation the power supply must not exceed specified operating conditions specified herein.

These operating conditions ensure the input AC connector is operated within its ratings.

The different input AC connectors and regional usage is not considered in this implementation of current limitation.

Therefore, it is under the responsibility of the user to ensure safety compliant operation.

110.3.1

PET2000-12-074RA

Between 0°C and 40°C power supply inlet temperature the maximum allowed output power is only depending on AC

input connector type chosen, regional usage and the applied nominal input AC voltage. Above 40°C the maximum

output power is further reduced with rising temperature.

Figure 35

to

Figure 38

illustrate these maximum current and

power levels.

The mentioned power levels are related to main output power only, in addition the standby output can be operated up

to 5 A with derating to 3 A as shown in

Figure 37

.

Above 55°C the power supply is adjusting the current limit level

I1 OC Slow

depending on input voltage range

(100-127 VAC or 200-240 VAC) and inlet temperature, as shown in

Figure 38

to protect the power supply from excessive

component temperatures.

Figure 35. Maximum I1 PET2000-12-074RA

(IEC 60320-C14)

Figure 36. Maximum P1 PET2000-12-074RA

(IEC 60320-C14)

Figure 37. Maximum ISB

Figure 38. Current limitation vs temperature

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Figure 39. Maximum I1 PET2000-12-074NA

(IEC 60320-C14)

Figure 40. Maximum P1 PET2000-12-074NA

(IEC 60320-C14)

Figure 41. Maximum I1 PET2000-12-074NAC

(IEC 60320-C16)

Figure 42. Maximum P1 PET2000-12-074NAC

(IEC 60320-C16)

Figure 43. Maximum I1 PET2000-12-074NAA

(Anderson Saf-D-Grid®)

Figure 44. Maximum P1 PET2000-12-074NAA

(Anderson Saf-D-Grid®)

110.3.2

PET2000-12-074NA

Between 0°C and 55°C power supply inlet temperature the maximum allowed output power is only depending on AC

input connector type chosen, regional usage and the applied nominal input AC voltage. Above 55°C the maximum

output power is further reduced with rising temperature.

Figure 39

to

Figure 44

illustrate these maximum current and

power levels.

The mentioned power levels are related to main output power only, in addition the standby output can be operated up

to 5 A with derating to 3 A as shown in

Figure 45

.

Above 55°C the power supply is adjusting the current limit level

I1 OC Slow

depending on input voltage range (100-127

VAC or 200-240 VAC) and inlet temperature, as shown in

Figure 46.

PET2000-12-074xA

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Figure 45. Maximum ISB

Figure 46. Current limitation vs temperature

PARAMETER

DESCRIPTION / CONDITION

CRITERION

ESD Contact Discharge

IEC / EN 61000-4-2, ±8 kV, 25+25 discharges per test point

(metallic case, LED, connector body)

A

ESD Air Discharge

IEC / EN 61000-4-2, ±15 kV, 25+25 discharges per test point

(non-metallic user accessible surfaces)

A

Radiated Electromagnetics Filed

IEC / EN 61000-4-3, 10 V/m, 1 kHz/80% Amplitude Modulation, 1µs

Pulse Modulation, 10 kHz ... 2 GHz

A

Burst

IEC / EN 61000-4-4, Level 3

AC port ±2 kV, 1 minute

A

Surge

IEC / EN 61000-4-5, Level 3

Line to Earth: ±2 kV

Line to Line: ±1 kV

A

RF Conducted Immunity

IEC / EN 61000-4-6, Level 3, 10 Vrms, CW, 0.1 … 80 MHz

A

Voltage Dips and Interruptions

IEC / EN 61000-4-11

Vi 230VAC / 50 Hz, 90% load, Phase 0°, Dip 100% , duration 10 ms

Vi 200VAC / 50 Hz, 70% load, Phase 0°, Dip 30% , duration 500 ms

1. Vi 200VAC / 50 Hz, 100% load, Phase 0°, Dip 20% , duration 10 s

V1

: A,

VSB

: A

V1

: A,

VSB

: A

V1

: A,

VSB

: A

PARAMETER

DESCRIPTION / CONDITION

CRITERION

Conducted Emission

EN 55022 / CISPR 22: 0.15 … 30 MHz, QP and AVG,

single power supply

Class A

6 dB margin

EN 55022 / CISPR 22: 0.15 … 30 MHz, QP and AVG,

2 power supplies in a system

Class A

Radiated Emission

EN 55022 / CISPR 22: 30 MHz … 1 GHz, QP,

single power supply

Class A

6 dB margin

EN 55022 / CISPR 22: 30 MHz … 1 GHz, QP,

2 power supplies in a system

Class A

Harmonic Emissions

IEC 61000-3-2, Vi = 115 VAC / 60 Hz & 230 VAC / 50 Hz, 100% Load

Class A

AC Flicker

IEC 61000-3-3, Vi = 230 VAC / 50Hz, 100% Load

Pass

Acoustical Noise

Distance at bystander position, 25°C, 50% Load

65 dBA

11.1 IMMUNITY

11.2 EMISSION

26

PET2000-12-074xA

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PARAMETER

DESCRIPTION / CONDITION

NOTES

Agency Approvals

Approved to latest edition of the following standards:

UL/CSA60950-1, IEC60950-1 and EN60950-1.

NEMKO NO86275, EAC NO 0230738, COC

Approved

Grade of Insulation

Input (L/N) to chassis (PE)

Basic

Input (L/N) to output

Reinforced

Output to chassis

None (Direct connection)

Creepage / Clearance

Primary (L/N) to chassis (PE)

Primary to secondary

Electrical Strength Test

Input to chassis

Input to output (tested by manufacturer only)

Min. 2121 VDC

4242 VDC

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

TA

Ambient Temperature

Up to 1’000 m ASL

0

+40

+55*

°C

Linear derating from 1’000 to 3’048 m ASL

+35

+45*

°C

TA ext

Extended Temp. Range

Reduced output power13, up to 1’000 m ASL

+55

+70*

°C

Linear derating from 1’000 to 3’048 m ASL

+50

+60*

TS

Storage Temperature

Non-operational

-20

+70

°C

Altitude

Operational, above Sea Level

-

3’048

m

Non-operational, above Sea Level

-

10’600

m

Shock, operational

Half sine, 11ms, 10 shocks per direction,

6 directions

1

g peak

Shock, non-operational

30

g peak

Vibration, sinusoidal, operational

IEC/EN 60068-2-6, sweep 5 to 500 to 5 Hz,

1 octave/min, 5 sweep per axis

1

g peak

Vibration, sinusoidal, non-operational

4

g peak

Vibration, random, non-operational

IEC/EN 60068-2-64, 5 to 500 Hz,

1 hour per axis

0.025

g2/Hz

* Max temperature values for PET2000-12-074NA model.

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

MTBF

Mean time to failure

TA

= 25°C, according Telcordia SR-332, issue 3, GB,

confidence level = 90%

860

kh

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

Dimensions

Width

73.5

mm

Heigth

40.0

mm

Depth

265.0

mm

m

Weight

1.1

kg

13

See chapter 10.3

Maximum electric strength testing is performed in the factory according to IEC/EN 60950, and UL 60950. Input-to-output

electric strength tests should not be repeated in the field. Bel Power Solutions will not honor any warranty claims resulting

from electric strength field tests.

PET2000-12-074xA

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Figure 47. Top and side view

Figure 48. Front view

Figure 49. Rear view

15.1 OUTLINE PET2000-12-074xA, PET2000-12-074xAC

28

PET2000-12-074xA

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15.2 OUTLINE PET2000-12-074NAA

Figure 50. Top and side view

Figure 51. Front view

Figure 52. Detail A

PET2000-12-074xA

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15.3 OPTION OF ADDING KEYING SCREW

A thread added to the side of the PET2000-12-074xA allows the user to add a screw to prevent the PET2000-12-074xA from

being inserted into systems using other card edge connector types with the same power supply width and height.

In such case, systems using PET2000-12-074xA must have a slot of ø6 mm x 14 mm implemented to allow

PET2000-12-074xA to be inserted. The maximum size of the screw head is ø6 mm and height 2.12 mm.

Figure 53. Polarizing screw

15.4 OUTPUT CONNECTOR PIN LOCATIONS

Figure 54. Rear view

Figure 55. Card edge PCB top view

Figure 56. Card edge PCB bottom view

P36

P29

P19

P28

S13

S24

P1

P10

P18

P11

S12

S1

P1

P36

S12

S13

30

PET2000-12-074xA

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PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

AC inlet

PET2000-12-074xA : IEC 60320-C14

PET2000-12-074xAC : IEC 60320-C16

PET2000-12-074NAA: Anderson Saf-D-Grid®, P/N 2006G1

AC cord requirement

Wire size

16

AWG

Output connector

36 Power- + 24 Signal-Pins PCB card edge

Mating output connector

Manufacturer: FCI Electronics

Manufacturer P/N: 10130248-005LF (see

Figure 59

for option x)

Bel Power Solutions P/N: ZES.00678

16.1 MATING OUTPUT CONNECTOR SPECIFICATION

Figure 57. Mating connector drawing page 1

PET2000-12-074xA

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Figure 58. Mating connector drawing page 2

32

PET2000-12-074xA

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Figure 59. Mating connector drawing page 3

PET2000-12-074xA

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SIGNAL NAME

DESCRIPTION

MATING SEQUENCE14

P1 ~ P10

GND

Power and signal ground (return)

1

P29 ~ P36

GND

P11 ~ P18

V1

+12 VDC main output

2

P19 ~ P28

V1

S1

A0

I2C address selection input

2

S2

A1

2

S3, S4

VSB

+12 V Standby positive output (as pins S3, S4)

2

S5

HOTSTANDBYEN_H

Hot standby enable signal, active-high

2

S6

ISHARE

Analog current share bus

2

S7

Reserved

For future use, do not connect

2

S8

PRESENT_L

Power supply seated, active-low

3

S9

A2

I2C address selection input

2

S10 ~ S15

GND

Power and signal ground (return)

2

S16

PWOK_H

Power OK signal output, active-high

2

S17

V1_SENSE

Main output positive sense

2

S18

V1_SENSE_R

Main output negative sense

2

S19

SMB_ALERT_L

SMB Alert signal output, active-low

2

S20

PSON_L

Power supply on input, active-low

3

S21, S22

VSB

+12 V Standby positive output (as pins S3, S4)

2

S23

SCL

I2C clock signal line

2

S24

SDA

I2C data signal line

2

Table 5. Output connector pin assignment

14

1 = First, 3 = Last, given by different card edge finger pin lengths and mating connector pin arrangement

16.2 MATING OUTPUT CONNECTOR SPECIFICATION

34

PET2000-12-074xA

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ITEM

DESCRIPTION

ORDERING PART

NUMBER

SOURCE

I2C Utility

Windows XP/Vista/7 compatible GUI

to program, control and monitor

Front-End power supplies (and other

I2C units)

ZS-00130

belfuse.com/power-solutions

Evaluation Board

Connector board to operate

PET2000-12-074xA. Includes an on-

board USB to I2C converter (use I2C

Utility as desktop software).

YTM.00046

belfuse.com/power-solutions

AC cable for PET2000-12-074NAA

Anderson Saf-D-Grid® receptacle to

IEC 60320-C20 plug, 14 AWG, 2 m,

Anderson P/N 2052KH2

TBD

DATE

REVISION

DESCRIPTION OF CHANGE

ECO/MCO

REFERENCE NO.

2019-Jun-19

AL

Page 4: Max. Output currents updated in the table

C94036

NUCLEAR AND MEDICAL APPLICATIONS - Products are not designed or intended for use as critical components in life support systems,

equipment used in hazardous environments, or nuclear control systems.

TECHNICAL REVISIONS - The appearance of products, including safety agency certifications pictured on labels, may change depending on

the date manufactured. Specifications are subject to change without notice.