HHS04Z52 DC-DC Converter Data Sheet
48V Input, 52.5V @ 3.8A Half-Brick Converter
Benefits
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Simplifies power system design, reduces design
time and technical risk
Reduces PCB area occupied by power conversion
and power management components
Features
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•
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Standard ½-brick footprint and pinout
Fully regulated 52.5VDC output
Efficiency up to 92%
100V/100ms input voltage surge
Input/output isolation: 2,250VDC
Basic insulation
Output overcurrent protection
Output overvoltage protection
Overtemperature protection
Remote sense
Remote on/off (primary referenced)
rd
Safety: UL60950-3 / CSA C22.2 60950-00,
TUV EN60950:2001, IEC60950-1:2001
Applications
Next-generation IP Telephony & Power Over LAN
(Unit is compliant to IEEE802.3af)
Distributed power architectures
Description
The HHS04Z52 is a DC-DC converter that operates over an input voltage range of 36VDC to 75VDC and provides
regulated 52.5V output rated up to 3.8 amps (200 watts) of continuous output current. The output is fully isolated
from the input, which allows a positive or negative output voltage configuration.
This open-frame module is constructed with a two-board approach. The power devices are connected to an
Insulated Metal Substrate (IMS) baseplate which provides a very low thermal impedance and ability to add a heat
sink. A separate PCB is populated with the control circuitry and is physically isolated from the hotter IMS board.
This approach allows for lower component temperatures, hence increasing reliability. The standard feature set
includes remote on/off, remote sensing, UVLO, OTP, OVP, output trim and a dedicated pin that connects to the
baseplate.
Model Selection
Model
HHS04Z52
1
Input
Voltage
VDC
36-75
Input
Current,
1
Max ADC
6.11
Output
Voltage
VDC
52.5
Output Rated
Current I
rated
ADC
3.8
Output
Ripple/Noise,
mV p-p
150
Typical
Efficiency @
I
rated
%
92
@ V
IN
min.
REV. SEP 15, 2004
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HHS04Z52 DC-DC Converter Data Sheet
48V Input, 52.5V @ 3.8A Half-Brick Converter
1. Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect
long-term reliability, and cause permanent damage to the converter.
Parameter
Input voltage
Operating Temperature
Storage Temperature
ON/OFF Control Voltage
Conditions/Description
Continuous
Transient, 100ms
Base Plate Temperature
Ambient
Referenced to -Vin
-40
-55
Min
Max
75
100
105
125
20
Units
VDC
VDC
°C
°C
VDC
2. Environmental and Mechanical Specifications
Parameter
Operating Temperature
Shock
Sinusoidal Vibration
Operating Humidity
Storage Humidity
Water Washing
Weight
Dimensions
MTBF (calculated)
(Overall)
per MIL-STD-217E, Ta = 30 C, or
Bellcore TR-NWT-000332 method 1
- ports count
O
Conditions/Description
Baseplate
Ambient
1
Min
-40
-40
50
1
Nom
Max
105
85
Units
°C
°C
g
g
Halfsine wave, 3 axes
GR-63-CORE, Section 5.4.2
Relative Humidity, Non-cond.
Relative Humidity, Non-cond.
Standard process
95
95
Yes
2.4 (68)
2.4 W
(60.9)
2
2.28 L
(58.4 )
0.415 H
(10.55)
%
%
Oz(g)
In.
(mm)
MHrs
1
See Figure 9, Power derating curve.
3. Isolation Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Conditions/Description
Min
Nom
Max
Units
Insulation Safety Rating
Isolation Voltage
Basic
Input to Output
Input to Baseplate
Output to Baseplate
2250
1500
1500
10
-
-
-
-
-
-
5
1
12.5
VDC
VDC
VDC
MOhm
nF
nF
nF
Isolation Resistance
Capacitance
Input to Output
Input to Output
Input to Baseplate
Output to Baseplate
REV. SEP 15, 2004
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HHS04Z52 DC-DC Converter Data Sheet
48V Input, 52.5V @ 3.8A Half-Brick Converter
4. Safety Regulatory Compliance
Safety Agency
Underwriters Laboratories
TUV product Service
CB report
Standard Approved To:
UL60950-
3RD
Marking
cULus
TUV PS Baurt mark
N/A.
/ CSA60950-00
TUV EN60950:2001
IEC60950-1:2001
5. Input Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Input Voltage
Maximum Input Current
Turn-On Input Voltage (UVLO)
Turn-Off Input Voltage
Input Reflected Ripple Current
Inrush Transient
1
2
Conditions/Description
Continuous
Vin =36V, Iout=I
rated
Ramping Up
Ramping Down
I
rated
, 12µH source inductance
1
BW=20MHz
Vin=Vin.max
Min
36
34
31
Nom
48
36
33
2.6
2
Max
75
6.11
38
35
7.5
2
Units
VDC
ADC
VDC
VDC
mA p-p
As
2
See Figure 1 for measurement method.
Vin = 48Vin.
REV. SEP 15, 2004
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HHS04Z52 DC-DC Converter Data Sheet
48V Input, 52.5V @ 3.8A Half-Brick Converter
6. Output Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Output Voltage
Set-point Accuracy:
Output Line Regulation:
Output Load Regulation:
Combined Output Voltage Regulation
Output Current
Efficiency
1
Conditions/Description
(Vin=48V, Io=3.8A)
(Vi = 36V to 75V)
(Io,min to Io,max)
Includes all above plus Temp.Co.
5
& Aging.
I
rated
T
AMB
=25°C, Vin
NOM
, Iout=3.8A
T
AMB
=25°C, Vin
NOM
, Iout=0.4A
Fixed frequency
Over line and load
Tamb= 0°C to 85°C
Min
-
-1.5
Nom
52.5
-
100
100
Max
-
+1.5-
Units
VDC
% Vout
mV
mV
50.93
0
52.5
54.07
3.8
VDC
ADC
%
%
kHz
92
89
300
150
50
30
50
25
100
30
3
Switching Frequency
Output Ripple
2, 3
(DC to 500kHz)
(500kHz to 1MHz)
(1MHz to 20MHz)
Turn-On Time
(via application of input voltage)
Rise Time
Turn-on Overshoot
Dynamic Regulation
4
mVp-p
mVp-p
mVp-p
ms
ms
%Vout
Time from Vin=UVLO to
regulation band
From 10 to 90% of Vout.nom
Overall input voltage, load, and
temperature conditions
Peak Deviation
Settling Time
Admissible Load Capacitance
1
2
75-100-75% load step change,
di/dt=1A/µs
to 1% error band
0.5
500
±3
15,000
%Vout
µs
µF
See Figure 1.
See Figure 4 for test setup
3
Output ripple may exceed the specification for Io < 0.2 Amps.
4
5
Measured @ Remote Sense pins, C
LOAD
= 200
µ
F min, Settling Time (Vo, 1% of Vo1)
Aging < 7 years, Tamb. = 0 C to +70 C
REV. SEP 15, 2004
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HHS04Z52 DC-DC Converter Data Sheet
48V Input, 52.5V @ 3.8A Half-Brick Converter
7. Protections Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Type
Threshold
Short Circuit
Overvoltage Protection
Type
Threshold
Type
Threshold
Hysteresis
Latching, recycle input voltage or ON/OFF signal to unlatch
Vin = Vin.nom, Iout=I
rated
Overtemperature Protection
Non-latching, auto-recovery
Baseplate temperature
105
10
115
°C
°C
65
VDC
Conditions/Description
Overcurrent Protection
Non-latching – Hiccup mode, auto-recovery
5
7.5
3.8
ADC
A
RMS
Min
Nom
Max
Units
8. Feature Specifications
All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted.
Parameter
Negative Logic (-N)
Converter ON
Source Current
Converter OFF
Open Circuit Voltage
1
Positive Logic
Converter ON
Open Circuit Voltage
Converter OFF
Source Current
Remote Sense Headroom
Output Voltage Trim
Trim Up
Trim Down
1
2
Conditions/Description
Min
Nom
Max
Units
ON/OFF
ON/OFF signal is low or the pin is
connected to -Vin – converter is ON
Von/off in reference to -Vin
ON/OFF pin is connected to -Vin
Von/off in reference to -Vin
ON/OFF pin is floating
On/Off signal is low or the pin is floating
–converter is OFF
Von/off in reference to -Vin
ON/OFF pin is floating
Von/off in reference to -Vin
ON/OFF pin is connected to -Vin
Remote Sense
2
-0.5
0.5
2.5
1.8
1
20
5
VDC
mADC
VDC
VDC
2.5
-0.5
0.5
0.5
10
5
1.8
1
VDC
VDC
VDC
mADC
VDC
2
Vin = Vin.nom, Iout=I
rated
Vin = Vin.nom, Iout=I
rated
-2.5
0.5
VDC
VDC
Consult factory for availability of this option.
Combined output voltage positive adjustment cannot exceed
0.5VDC.
REV. SEP 15, 2004
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