A
10 Watt TC Single Series DC/DC Converters
D-106
Manufacturing Company, Inc
. • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
1
SHIELDED
ISOLATION TRANSFORMER
THERMAL SHUTDOWN
CURRENT
MODE
PWM
ISOLATED
FEEDBACK
LOW TC
BANDGAP REFERENCE
SIX-SIDED SHIELDED COPPER CASE
CC D
4
5
7
+ OUTPUT
CMN
TRIM
3
2
1
+ INPUT
- INPUT
ON/OFF
10 Watt TC Single Series Block Diagram
Features
!Extra Wide 3:1 Input Voltage Range, 20-60 VDC
!Low Noise, Highly Regulated Single Outputs
!Efficiency 75% for All Line Conditions
!No Derating to 80°C Case Temperature
!Six-Sided Shielded Low Thermal Gradient
Copper Case
!500 VDC Minimum Input to Output Isolation
!Overvoltage Protected Input and Outputs
!Pulse by Pulse Digital Current Limiting
!Overtemperature Protection Circuit
!5 Year Warranty
Description
These single output converters are designed for wide input
range, low noise, telecommunications, industrial control,
medical and instrument applications. The extra wide input
range (3:1) is ideal for battery or unregulated input applications.
These converters are state-of-the-art 120kHz MOSFET
based designs that provide outstanding line and load regulation.
The single outputs are regulated with a high loop gain current
mode control method that provides linear regulator type
performance.
Also included is an open collector TTL/CMOS compatible
logic shutdown pin to control converter operation.
The TC Single Series is protected from output shorts to
common by a high speed, pulse by pulse digital, current limit
circuit and a thermal overload sensing circuit.
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A
10 Watt TC Single Series DC/DC Converters
D-106
Manufacturing Company, Inc
. • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
2
(6) Short term stability is specified after a 30 minute warm-up at full
load, and with constant line, load and ambient conditions.
(7) The transient response is specified as the time required to settle
from 50 to 75% step load change (rise time of step = 2µ Sec.) to
a 50 mV error band.
(8) Dynamic response is the peak overshoot voltage during the
transient response time defined in note 7 above.
(9) The input ripple rejection is specified for DC to 120Hz ripple with
a modulation amplitude of 1% Vin.
(10) For module protection only, see also note 4.
(11) The logic shutdown pin is Open Collector TTL, CMOS, and relay
compatible. The input to this pin is referenced to Pin 2, -Input
and is protected to +100 VDC.
(12) Case is tied to Pin 3, +Input.
(13) The functional temperature range is intended to give an additional
data point for use in evaluating this power supply. At the low
functional temperature the power supply will function with no
side effects, however, sustained operation at the high functional
temperature will reduce expected operational life. The data
sheet specifications are not guaranteed over the functional
temperature range.
(14) The case thermal impedance is specified as the case temperature
rise over ambient per package watt dissipated.
NOTES
*All parameters measured at Tc = 25° C, nominal input voltage
and full rated load unless otherwise noted. Refer to the CALEX
Application Notes for the definition of terms, measurement
circuits and other information.
(2) Noise is measured per CALEX Application Notes.
(3) An external capacitor capable of withstanding at least 700 mA RMS
of 120 kHz ripple current must be connected directly across the +
and - inputs. Suggested capacitors are:
Sprague Electric: 672D686H100DM3C, 68µF, 100V
672D127H100ET3C, 120µF, 100V
Panasonic: ECEA2AFE101, 100µF, 100V
ECEA2AFE121, 120µF, 100V
United Chemi-Con: SXE100VB120M12.5X25LL, 120µF, 100V
SXE100VB180M12.5X30LL, 180µF, 100V
SXE100VB220M12.5X35LL, 220µF, 100V
Note:All of the above capacitors are 105°C Rated. Multiple smaller sized
capacitors may be used in parallel as long as their total ripple
capability is above 700 mA RMS (see IRR curve).
(4) Determine the correct fuse size by calculating the maximum DC
current drain at low line input, maximum load and then adding 20
to 25%. A slow blow type fuse is recommended.
(5) No minimum load required.
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A
10 Watt TC Single Series DC/DC Converters
D-106
Manufacturing Company, Inc
. • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
3
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BOTTOM VIEW SIDE VIEW
Low Noise Input Circuit
The circuit shown below will reduce reflected ripple to 50 mA
P-P. Keep all components as close to the converter as
possible
The inductor is 35 turns on a Micro-Metals T50-26 Iron
Powder Core.
See note 3 for capacitor recommendations and note 4 for
fuse sizing.
Mechanical tolerances unless otherwise noted:
X.XX dimensions: ±0.020 inches
X.XXX dimensions: ±0.005 inches
Seal around terminals is not hermatic. Do not immerse unts in any
liquid.
Connections for Output Trim
Use one resistor for either trim up or trim down. The values can
range from infinity to zer ohms with zero ohms giving the most
trim.
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4
6
5
4
6
5
10K LOAD LOAD
+ OUT
TRIM
CMN
+ OUT
TRIM
CMN
USING TRIMPOT USING FIXED RESISTORS
TRIM
DOWN
TRIM
UP
THIS CAPACITOR IS REQUIRED
FOR PROPER OPERATION
FUSE 40 µH, 700 mA
TO INPUT
SOURCE
3
2
+ INPUT
- INPUT
See Note 3
A
10 Watt TC Single Series DC/DC Converters
D-106
Manufacturing Company, Inc
. • Concord, California 94520 • Ph: 925/687-4411 or 800/542-3355 • Fax: 925/687-3333 • www.calex.com • Email: sales@calex.com
4
Typical Performance (Tc=25°C; Vin=48VDC, Full Rated Load
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
70
75
80
85
90
EFFICIENCY (%)
48S12.850TC EFFICIENCY Vs. LINE INPUT
100% FULL LOAD
50% FULL LOAD
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
70
75
80
85
90
EFFICIENCY (%)
48S5.2000TC EFFICIENCY Vs. LINE INPUT
50% FULL LOAD
100% FULL LOAD
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
70
75
80
85
90
EFFICIENCY (%)
48S15.700TC EFFICIENCY Vs. LINE INPUT
100% FULL LOAD
50% FULL LOAD
0 20406080100
LOAD (%)
50
60
70
80
90
EFFICIENCY (%)
48S12.850TC EFFICIENCY Vs. LOAD
LINE = 20VDC
LINE = 48VDC
LINE = 60VDC
0 20406080100
LOAD (%)
50
60
70
80
90
EFFICIENCY (%)
48S5.2000TC EFFICIENCY Vs. LOAD
LINE = 20VDC
LINE = 48VDC
LINE = 60VDC
0 20406080100
LOAD (%)
50
60
70
80
90
EFFICIENCY (%)
48S15.700TC EFFICIENCY Vs. LOAD
LINE = 20VDC
LINE = 48VDC
LINE = 60VDC
0 102030405060
LINE INPUT (VOLTS)
0.0
0.2
0.4
0.6
0.8
INPUT CURRENT (AMPS)
INPUT CURRENT Vs. LINE INPUT
100% FULL LOAD
50% FULL LOAD
20 25 30 35 40 45 50 55 60
LINE INPUT (VOLTS)
0.0
0.2
0.4
0.6
0.8
1.0
REFLECTED RMS RIPPLE (AMPS)
TC SERIES INPUT RIPPLE Vs. LINE INPUT
50% FULL LOAD
100% FULL LOAD
0 20 40 60 80 100 120 140 160
OUTPUT LOAD (%)
0
20
40
60
80
100
120
OUTPUT VOLTAGE (%)
OUTPUT VOLTAGE Vs. OUTPUT LOAD
-30 -20 -10 0 10 20 30 40 50 60 70 80
CASE TEMPERATURE (Deg C)
-0.40
-0.30
-0.20
-0.10
0.00
0.10
NORMALIZED OUTPUT (%)
OUTPUT VOLTAGE Vs. CASE TEMPERATURE
-25 -15 -5 5 15 25 35 45 55 65 75 85
AMBIENT TEMPERATURE (Deg C)
0.0
2.0
4.0
6.0
8.0
10.0
12.0
OUTPUT POWER (WATTS)
TC SERIES POWER DERATING
INFINITE HEAT SINK
STILL AIR
←SAFE OPERATING AREA→
↑
↓
FREQUENCY (Hz)
IMPEDANCE (OHMS)
OUTPUT IMPEDANCE Vs. FREQUENCY
48S5.2000TC 48S15.700TC
1.0
0.1
0.01 10 100 1K 10K 100K 1MEG
