HCD SERIES
HCD SERIES - 100 WATTS
FEATURES
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Half-brick size, 2.4” x 2.28” x 0.5”
Wide input: 36-75V in
Remote on/off, positive or negative reference
Short circuit protection
1600 VDC isolation
Independently regulated outputs (see table)
EMI suppression filter
Adjustable output voltage
Two year warranty
Fixed frequency
85% efficiency (typ.)
UL/CUL 1950, file# E155800
100 WATTS
THE HCD SERIES FROM WALL INDUSTRIES, INC.
The HCD Series are dual output fully isolated converters
with high efficiency, 85% typically. Users can get 100
watts of power using current from both rails.
SPECIFICATIONS: HCD SERIES
INPUT SPECIFICATIONS
Input voltage range.......................................................36-75VDC
UVLO start-up voltage ......................................................35V typ
UVLO shudown voltage ....................................................33V typ
Input filter (Note 1)...........................................................L-C type
Input voltage variation ......dv/dt..................................5V/ms, max
(complies with ETS300 132 part 4.4)
Remote On/Off (Note 2) Pos. logic On ..Open or 3.5V<Vr<+Vin
Off............Short or Vr<1.2V
Neg. logic On............Short or Vr<1.2V
Off ..Open or 3.5V<Vr<+Vin
OVLO start-up voltage ...................................................76.5V typ
OVLO shutdown voltage ................................................78.5V typ
GENERAL SPECIFICATIONS
Efficiency ........................................................................see table
Isolation voltage ...............Input to Output .............1600VDC, min
Input to Case................1000VDC, min
Output to Case.............1000VDC, min
Isolation resistance .................................................10
9
ohms, min
Isolation capacitance ................................................1500pF, max
Switching frequency ..................................................300KHz, typ
Approvals and standards.............IEC60950, UL60950, EN60950
Case material ..................................Non-conductive black plastic
Base material ..............................................Aluminum base-plate
Potting material ................................................Silicon (UL-94 V0)
Weight .......................................................................105g (3.7oz)
MTFB (Note 4)......................................................1.004 x 10
6
hrs
OUTPUT SPECIFICATIONS
Output power....................total output power .......100 Watts, max
Voltage accuracy..............FL and nominal Vin ...................±1.0%
Voltage adjustability .........For each output ..........................±10%
Minimum load...........................................................................0%
Line regulation..................LL to HL at Full Load ............see table
Load regulation ................Dual (0% to 100% FL) ..........see table
Dual for each output .............see table
Ripple and noise (Note 3) 20MHz bandwidth ..............100mVp-p
Temperature coefficient.....................................±0.02% / ºC, max
Transient response recovery time 25% load step chg .......200uS
Over voltage protection threshold .....2.5V.............................3.0V
3.3V.............................3.9V
5V................................6.2V
Short circuit protection.......................Hiccup, automatic recovery
ENVIRONMENTAL SPECIFICATIONS
Operating base plate temp. range (Note 5) ........-40ºC to +100ºC
Over temp. protection ......for base plate.............................105ºC
Humidity max, non-condensing..............................................95%
Storage temperature range.................................-55ºC to +125ºC
Thermal shock.......................................................MIL-STD-810D
Vibration ............................10~55Hz, 2G, 30 minutes along X,Y,Z
EMC CHARACTERISTICS
Conducted emissions.......EN55022(Note 6).....................Level A
.........................................EN55022(Note 6) ....................Level B
Radiated emissions..........EN55022..................................Level A
Radiated immunity ...........EN61000-4-3 .................Perf. Criteria2
Fast transient ...................EN61000-4-4 .................Perf. Criteria2
Surge................................EN61000-4-5 .................Perf. Criteria2
Conducted immunity ........EN61000-4-6 .................Perf. Criteria2
3/18/04
1
603 778 2300
WWW
.
WALLINDUSTRIES
.
COM
100 WATTS
MODELS
Input
Voltage
(V)
36 - 75
Output
Voltage
(V)
5 / 3.3
5 / 2.5
3.3 / 2.5
Output
Current
(A)
20 / 25
20 / 25
25 / 25
Model
Number
HCD48-533-100
HCD48-525-100
HCD48-3325-100
Line
Regulation
(mV)
25 / 16.5
25 / 12.5
16.5 / 12.5
Load
Regulation
(mV)
25 / 16.5
25 / 12.5
16.5 / 12.5
HCD SERIES
Efficiency
(Note 7)
(%)
87
85
85
NOTES:
1) An external filter capacitor is required for normal operation. The capacitor should be capable of
handling 1A ripple current for 48V models.
We suggest the Nippon chemi-con KMF series, 220
µ
F/100V, ESR 90 mOhm
2) Positive logic standard, negative logic optional. Pin voltage referenced to negative input.
To order negative logic ON/OFF control add the suffix “R”
3) For each output.
4) BELLCORE TR-NWT-000332. Case I: 50% stress, Temperature at 40°C
(Ground fixed and controlled environment)
5) Heat sink is optional. Consult factory for details
6) The HCD series meets Level A and Level B conducted emissions only with external components
connected before the input pin to the converter.
7) Typical value at nominal input voltage and full load.
Efficiency test conditions: HCD48-533-100
@ 5V / 12A
and 3.3V / 12A
HCD48-525-100
@ 5V / 12A
and 2.5V / 16A
HCD48-3325-100 @ 3.3V / 18A and 2.5V / 16A
3/18/04
WWW
.
WALLINDUSTRIES
.
COM
603 778 2300
2