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參數(shù)資料
| 型號(hào)： | PQ50073HZB60NNS-G |
| 廠商： | SYNQOR INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 440 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, HALF BRICKAGE-9 |
| 文件頁(yè)數(shù)： | 13/13頁(yè) |
| 文件大?。?/td> | 1838K |
| 代理商： | PQ50073HZB60NNS-G |
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Technical Specification
Product # PQ50073HZB60
Phone 1-888-567-9596
www.synqor.com
Doc.# 005-0005484 Rev. 2
03/31/10
Page 9
Input:44-52 V
Output:7.3V
Current:60A
Part No.:PQ50073HZB60
BASIC OPERATION AND FEATURES
The PowerQor Zeta series converter uses a two-stage power
conversion topology. The first stage keeps the output voltage
constant over variations in line, load, and temperature. The
second stage uses a transformer to provide the functions of
input/output isolation and voltage step-down to achieve the low
output voltage required.
Both the first stage and the second stage switch at a fixed
frequency for predictable EMI performance. Rectification of
the transformer’s output is accomplished with synchronous
rectifiers. These devices, which are MOSFETs with a very low
on-state resistance, dissipate significantly less energy than
Schottky diodes, enabling the PowerQor converter to achieve
high efficiency.
The PowerQor series of half-brick, quarter-brick and eighth-
brick converters uses the industry standard footprint and pin-out
configuration.
CONTROL FEATURES
REMOTE ON/OFF (Pin 2): The ON/OFF input, Pin 2, permits
the user to control when the converter is on or off. This input is
referenced to the return terminal of the input bus, Vin(-). The
converter is available with either positive or negative logic used
for the ON/OFF input.
In the positive logic version, the ON/OFF input is active high
(meaning that a high voltage turns the converter on). In the
negative logic version, the ON/OFF signal is active low (meaning
that a low voltage turns the converter on). Figure A details five
possible circuits for driving the ON/OFF pin.
REMOTE SENSE(+) (Pins 7 and 5): The SENSE(+) inputs
correct for voltage drops along the conductors that connect the
converter’s output pins to the load.
Pin 7 should be connected to Vout(+) and Pin 5 should be
connected to Vout(-) at the point on the board where regulation
is desired. If these connections are not made, the converter will
deliver an output voltage that is slightly higher than its specified
value.
Note: The output over-voltage protection circuit senses the
voltage across the sense leads (pins 7 and 5) to determine when
it should trigger, not the voltage across the converter’s output
pins (pins 8 and 4).
OUTPUT VOLTAGE TRIM (Pin 6): The TRIM input permits the
user to adjust the output voltage across the sense leads up or
down according to the trim range specifications. SynQor uses
industry standard trim equations.
To decrease the output voltage, the user should connect a
resistor between Pin 6 (TRIM) and Pin 5 (SENSE(
–) input). For
a desired decrease of the nominal output voltage, the value of
the resistor should be:
Rtrim-down =
(100%)_ 2 kW
D
where
D% = Vnominal – Vdesired x 100%
Vnominal
Open Collector Enable Circuit
Remote Enable Circuit
Direct Logic Drive
Negative Logic
(Permanently
Enabled)
(Permanently
Enabled)
ON/OFF
Vin(_
)
ON/OFF
Vin(_
)
ON/OFF
5V
TTL/
CMOS
Vin(_
)
Vin(_
)
Positive Logic
ON/OFF
Vin(_
)
Figure A: Various circuits for driving the ON/OFF pin.
Application Section
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