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PDF ( 数据手册 , 数据表 ) HWD075DGE-A

零件编号 HWD075DGE-A
描述 HWD Series . 75 Watt/ Half-Brick DC/DC Converter Wide Input Range Dual Output
制造商 Power-One
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HWD075DGE-A 数据手册, 描述, 功能
HWD Series – 75 Watt, Half-Brick DC/DC Converter
Wide Input Range
Dual Output
Datasheet
Features
Applications
Distributed power architectures
Telecommunications equipment
LAN/WAN applications
Data processing applications
75 Watts total output power
Wide input range 18V – 60V
Independent dual outputs
Flexible load sharing
Open-frame design with IMS board
Low profile – 12.7mm height
Start-up into high capacitive load
Output overcurrent protection (self re-start)
Output overvoltage protection (self re-start)
Overtemperature protection (self re-start)
Setpoint accuracy ± 2.0%
Output voltage trim adjust, independent for
each output
Input/output isolation: 1500V
UL 1950 Recognition, CSA 22.2 No. 950-95
certification
Description
The HWD series provides onboard conversion of standard telecom and datacom input voltages into two isolated
low-voltage outputs. These products offer a unique combination of wide input range, low profile, and high current
capability. High efficiency and advanced thermal management enable these half-brick products to deliver full
rated power at 55°C ambient temperature, with 200 LFM airflow, without the addition of heatsinks.
Model
HWD075DGE-A
Input
voltage
range, VDC
18-60
Selection Chart
Input
Output Output rated
current, voltage, current,
max, ADC VDC
ADC
5.5 5.0/3.3 15/15
Output Ripple
and Noise,
mV p-p
100
Efficiency %
81% @ 24Vin
79% @ 48Vin
REV. 9/01
www.power-one.com
Page 1 of 15







HWD075DGE-A pdf, 数据表
HWD Series – 75 Watt, Half-Brick DC/DC Converter
Wide Input Range
Dual Output
Datasheet
Output Current Protection
To provide protection in an output overload or short circuit condition, the converter is equipped with current
limiting circuitry and can endure the fault condition for an unlimited duration. At the point of current-limit
inception, the converter goes into “Hiccup Mode”, causing the output current to be limited both in peak and
duration. The converter operates normally once the output current is brought back into its specified range.
Enable
Two enable options are available. Positive Logic Enable and Negative Logic Enable. Positive Logic Enable turns
the converter on during a logic-high voltage on the enable pin, and off during a logic-low. Negative Logic Enable
turns the converter of during a logic-high and on during a logic-low.
Output Voltage Adjustment
Output voltage adjustment is accomplished by connecting an external resistor between the Trim Pin and either
the +Vo1 or –Vo1 Pins.
With an external resistor between the Trim Pin and +Vo1 Pin (Radj-down) the output voltage set point (Vo,adj)
decreases. The following equation determines the required external resistor value to obtain an adjusted output
voltage:
Radj, dn

(Vo, adj
Vo, nom
D)A
Vo, adj
Bohm
Where Radj-down is the resistance value and A, B, and D are defined in Table 7.
With an external resistor between the Trim Pin and –Vo1 Pin (Radj-up) the output voltage set point (Vo,adj)
increases. The following equation determines the required external resistor value to obtain an adjusted output
voltage:
Raj, up

(Vo,
AD
adj D)
C
Bohm
Where Radj-up is the resistance value and A, B, C, and D are defined in Table 7:
Table 8 Output Adjustment Variables.
Output
Vo1
Vo2
A
4990
4990
B
2000
2000
C
2.5
0.8
D
2.5
2.5
REV. 9/01
www.power-one.com
Page 8 of 15














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