HCD SERIES
HCD SERIES - 75 WATTS
FEATURES
• 75 watts total output power
5V/3.3V, 5V/1.8V, 3.3V/2.5V, 3.3V/1.8V
• independently regulated outputs
• no minimum load
• under-voltage lockout
• efficiency up to 88%
• half-brick package
• tight line-load regulation
TO 75 WATTS
The HCD Series is a high density, half-brick size, high
current, dual output dc/dc converter with through-hole
mounting. The series provides on-board conversion of
standard telecom and datacom input voltages to two
independently regulated output voltages.
SPECIFICATIONS: HCD SERIES
INPUT SPECIFICATIONS
All specifications apply at 25°C ambient unless otherwise noted.
OUTPUT SPECIFICATIONS
Output power ...................................................... 75 Watts max.
Voltage accuracy Full load and nominal Vin ................ ±1.5%
Voltage adjustability .......................................................... ±10%
Minimum load ...................................................................... 0%
Line regulation (HL-LL at FL).......................................... ±0.2%
Load regulation (10% to 100% FL).................................. ±0.2%
Ripple/noise (20MHz BW) (Note 1).......................... 100mV p-p
Temperature coefficient ................................ ±0.02% / °C, max.
Transient response recovery time
(25% load step change) .................................. 200uS
Over voltage protection threshold .......... 115% ~ 130% of Vout
(Non-latching hiccup)
Maximum total output current I1 + I2 ................................15A
Over current protection threshold ....110% ~ 140% of Iout rated
Short circuit protection ....................Hiccup, automatic recovery
recovery after half-load to full load step change to within 1% of the
regulation band with no more than 5% deviation.
Input voltage range .................................................. 36-75VDC
UVLO start-up voltage .................................................. 34V typ.
UVLO shutdown voltage .............................................. 32V typ.
Input filter (Note 2) ...................................................... L-C type
Input voltage variation ......dv/dt ............................ 5V/mS,max
(Complies with ETS300 132 part 4.4)
Input surge voltage 100mS max ................................ 100VDC
Start up time nominal Vin, constant resistive load .. 25 mS typ.
Input reflected ripple current ...................................... 20mA p-p
(5Hz to 20MHz, 12µH source impedance)
Remote ON/OFF (Note 3)
Positive logic ON = Open or 3.5V < Vr < 15V, Iin=50µA max.
OFF = Short or 0V < Vr < 1.2V, Iin=1mA max.
Negative logic ON = Short or 0V < Vr < 1.2V, Iin=1mA max.
OFF = Open or 3.5V < Vr < 15V, Iin=50µA max.
GENERAL SPECIFICATIONS
Efficiency .................................................................... see table
Isolation voltage
Input to Output .... 1600 VDC 1 min.
Input to Case ...... 1000 VDC 1 min.
Output to Case .... 1000 VDC 1 min.
Isolation resistance .................................................... 107 ohms
Isolation capacitance .................................................... 2500 pF
Switching frequency .............................................. 300KHz, typ.
Design meets safety standard pending........ UL1950, EN60950
Case material ..........................Open with aluminum base-plate
Weight.................................................................. 57g (2.01 oz.)
MTBF (Note 4) .................................................... 1.3 x106 hrs
ENVIRONMENTAL SPECIFICATIONS
Operating base-plate temperature (Note 5) .... -40°C to +100°C
Over temperature protection ............................................ 110°C
Humidity max., Non-condensing ........................................ 95%
Storage temperature range ............................ -55°C to +125°C
Thermal shock .................................................. MIL-STD-810D
Vibration .................................... 10~55Hz., 2G, 3 minute period
30 minutes along X, Y and Z
3/17/03
1
603 778 2300
WWW
.
WALLINDUSTRIES
.
COM
TO 75 WATTS
SPECIFICATIONS: HCD SERIES
(continued)
EMC CHARACTERISTICS
Conducted emissions
Radiated emissions
Immunity:
ESD air
ESD contact
Radiated field enclosure
Fast transient/burst
Conducted
EN55022 (Note 6) .................. Level A
EN55022 (Note 6) .................. Level B
EN55022 ................................ Level A
IEC61000-4-2..........................
IEC61000-4-2..........................
IEC61000-4-3..........................
IEC61000-4-4 .... On DC input
IEC61000-4-6..........................
Level
Level
Level
Level
Level
2
2
2
1
2
HCD SERIES
Due to advances in technology, specifications subject to change
without notice.
MODELS
Input
Voltage
36-75
Output
Voltage
5/3.3
3.3/2.5
5/1.8
3.3/1.8
Output
Current
15/15
15/15
15/15
15/15
Model
Number
HCD48-533-75
HCD48-3325-75
HCD48-518-75
HCD48-3318-75
Efficiency (%)
(Note 7)
88
81
85
81
NOTES:
1) Measured with a 1uF M/C and a 10uF M/C
2) An external filter capacitor is required for normal operation. The capacitor should be capable of
handling 1A ripple current for 48V models.
Wall suggests the Nippon chemi-con KMF series, 220 uF/100V, ESR 90 mOhm
3) Positive logic standard, negative logic optional. Pin voltage referenced to negative input.
To order negative logic ON/OFF control add the suffix “R”
4) BELLCORE TR-NWT-000332. Case I: 50% stress, Temperature at Tc=40°C
(Ground fixed and controlled environment)
5) Heat sink is optional. Consult factory for details
6) The HCD75 meets level A and level B conducted emissions only with external components
connected before the input pin to the converter.
7) Efficiency test condition:
Nominal input voltage and both output currents at 7.5A
3/17/03
WWW
.
WALLINDUSTRIES
.
COM
603 778 2300
2
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