HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 1 of 6
www.cd4power.com
FEATURES
n52.5V 200W Half-Brick DC/DC Converter
nHigh-Efficiency 92% at Full Load
n2250Vdc Isolation
nRemote-Sense
nRemote on/off
nTrim Capability
nIndustry Standard Pin-out
n0.42” (10.67mm) Height
DESCRIPTION
The HHS04-520 is an industry standard foot-
print half-brick DC/DC converter that complies
with IEEE802.3af standard for Power over LAN
applications, which requires basic isolation of
2250Vdc and stringent start-up characteristics
and low-noise operation. It delivers 200W of
isolated 52.5V at 92% efficiency over voltage
input range of 36V to 75V. Standard features
are remote on/off, remote sense, trim capability,
over-voltage, over-current and over-temperature
protection. The HHS04-520 can operate in parallel
for additional power with external circuitry. The
HHS04-520 measures 2.40”(L) x 2.28”(W) x
0.43”(H) and has an operating temperature range
of –40°C to +100°C.
SELECTION GUIDE
Order Code Input Voltage Output Voltage Output
Current
Output
Power Efficiency
V (nom.) V A W (MAX.) % (TYP.)
HHS04-520-OB 48 52.5 3.81 200 92.0%
INPUT CHARACTERISTICS
Parameter Conditions MIN. TYP. MAX. Units
Input Voltage 36 48 75
V
Under Voltage Lockout
Turn-on 32 36
Turn-off 30 34
Turn-on 75 79
Turn-off 76 80
Reflected Ripple 12µH Source Inductance 7.5 mA p-p
Inrush Transient 2 A2s
OUTPUT CHARACTERISTICS
Parameter Conditions MIN. TYP. MAX. Units
Voltage set point 51.30 52.50 53.88 Vdc
Risetime 10% to 90% 5 30 mSec
Turn-on delay Enable <2V to VOUT >10% 100 mSec
Line regulation ±0.1% VOUT
Load regulation ±0.22%
Total regulation150.93 54.08
VDCOutput trim6-2.5 +0.5
Remote-sense60.5
Transient response 50% to 75% of Iomax 1A/µs ±3% Vo
50% to 25% of Iomax 1A/µs ±3%
Over-voltage (latching) 58 65 VDC
Over-current (self recovery) 4.5 6.5 ADC
Output ripple & noise2
<500kHz 150
mV p-p
500kHz to 1MHz 50
>1MHz 30
External capacitance3200 1000 µF
GENERAL CHARACTERISTICS
The enable signal is logic low, referenced to Vi(-). The pin should be tied to Vi(-) if it is not used. (Isink = 1mA MAX.,
Voff =15V MAX.).
TEMPERATURE CHARACTERISTICS
Parameter Conditions MIN. TYP. MAX. Units
Operating4Measured on baseplate -40 100 °C
Storage -55 125
PROTECTION CHARACTERISTICS
Parameter Conditions MIN. TYP. MAX. Units
Over-temperature5 (Self-recovery) Temperature at sensor 109 115 121 °C
1. Includes line & load regulation/thermal & aging effects on regulation.
2. 10µF low ESR electrolytic + 1µF ceramic de-coupling capacitor at measurement point.
3. At least minimum external capacitance required.
4. Baseplate operating temperature measured at indicated Temperature Measurement Location with 200LFM airflow over entire
converter.
5. Over-Temperature Protection sensor trip range. Sensor is located on inner surface of FR4 PC Board to protect components on entire
converter.
6. Remote Sense and Output Trim are not additive.
HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 2 of 6
www.cd4power.com
OUTPUT VOLTAGE ADJUSTMENT
TRIM DOWN TRIM UP
When the output voltage is trimmed up, output current must be derated so that the maximum output power (shown in the selection table) is not exceeded.
VIN VOUT
-VOUT
TRIM
RUP
VIN VOUT
-VOUT
TRIM
RDOWN
HHS04HHS04
Rtrim_up: = Vo·(100+Δ%) 100+2·Δ%
Δ%
1.225·Δ% –(kΩ)
Rtrim_down: = 100 2
–(kΩ)
Δ%
EFFICIENCY CURVES
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ISOLATION CHARACTERISTICS
Parameter Conditions MIN. TYP. MAX. Units
Input-Output 2250 Vdc
Input-case/Output-case 1125
Isolation capacitance 1500 4500 pF
Isolation resistance 10 MΩ
Insulation class, Certified to C-CSA-US, 60950 Basic
HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 3 of 6
www.cd4power.com
THERMAL DERATING GRAPHS
Heatsink used is 2.28” L x 2.4” W x 0.7” H, non-anodized, mounted to baseplate, where noted above.
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HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 4 of 6
www.cd4power.com
START-UP
VIN=48V IOUT=1.0A COUT=240µF
CH.1 VOUT CH.2 Enable On/Off
VIN=48V IOUT=1.0A COUT=1020µF
CH.1 VOUT CH.2 Enable On/Off
INPUT REFLECTED RIPPLE
IOUT=0.38A IOUT=3.8A
T1 T2 T1 T2
(mA pk-pk) (mA pk-pk) (mA pk-pk) (mA pk-pk)
(mA rms) (mA rms) (mA rms) (mA rms)
36V input 1.62 65.2 2.13 87.6
0.348 22.8 0.67 24
48V input 0.922 53.2 1.46 68.4
0.413 15.48 0.458 19.9
75V input 0.84 30.6 1.01 34
0.404 8.81 0.51 10.6
T1: measured between the 48V power supply and the filter.
T2: measured between the filter and the unit under test.
COUT=200µF
T2: VIN=48V IOUT:3.8A 20mA/div T1: VIN=48V IOUT:3.8A 1mA/div
DC
DC
VIN
33µF,
ESR<0.7 Ohms
at 100kHz
220µF,
ESR<0.1 Ohms
at 100kHz
12µH
Input Filter
48V power supply
-VIN
T1 T2
HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 5 of 6
www.cd4power.com
OUTPUT TRANSIENT RESPONSE
VIN=48V IOUT=0A-1A COUT=240µF
CH.1 VOUT CH.2 IOUT (1A/10mV)
VIN=48V IOUT=1A-2A COUT=240µF
CH.1 VOUT CH.2 IOUT (1A/10mV)
VIN=48V IOUT=2A-3A COUT=240µF
CH.1 VOUT CH.2 IOUT (1A/10mV) VIN=48V IOUT=3A-4A COUT=240µF
CH.1 VOUT CH.2 IOUT (1A/10mV)
OUTPUT RIPPLE
VIN=36V IOUT=3.81A COUT=240µF VIN=75V IOUT=3.81A COUT=240µF
VIN=48V IOUT=0.81A COUT=240µF VIN=48V IOUT=3.81A COUT=240µF
HHS04
High-Efficiency 200W Half Brick DC/DC Converter
CDC_HHS04.1 Page 6 of 6
www.cd4power.com
PACKAGE SPECIFICATIONS
MECHANICAL DIMENSIONS PIN CONNECTIONS
Pin Diameter Function
1 0.040 (1.016) -VIN
2 0.040 (1.016) CASE
3* 0.040 (1.016) ON/OFF
4 0.040 (1.016) +VIN
5 0.080 (2.032) +VOUT
6 0.040 (1.016) +SENSE
70.040 (1.016) TRIM
80.040 (1.016) -SENSE
90.080 (2.032) -VOUT
* See General Characteristics
C&D Technologies, Inc reserve the right to alter or improve the specification, internal design or manufacturing process
at any time, without notice. Please check with your supplier or visit our website to ensure that you have the current and
complete specification for your product before use.
© C&D Technologies, Inc 2005 CDC_HHS04.1
No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including,
but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D
Technologies, Inc. Instructions for use are available from www.cd4power.com
C&D Technologies, Inc.
1150 Eglinton Ave. East
Toronto, ON M3C 1H7, Canada
Tel: +1 866 740 1232
Fax +1 416 448 3203
email: sales.cps@cdtechno.com
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Top View
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Side View
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Bottom View
Dimensions: 2.28 (57.9) L x 2.4 (61.0) W x 0.42 (10.6) H
All dimensions in inches (mm).
C&D Technologies, Inc.
11 Cabot Boulevard, Mansfield,
MA 02048-1151, USA
Tel: +1 (508) 339-3000
Fax: +1 (800) 233-2765
email: sales@cdtechno.com
* Temperature measurement location