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参数资料
| 型号： | HKS48T30120-PCA0 |
| 厂商： | Power-One |
| 文件页数： | 9/14页 |
| 文件大小： | 0K |
| 描述： | DC/DC HALF BRICK 20V 0UT 48V IN |
| 标准包装： | 50 |
| 系列： | * |
HKS48T30120 DC-DC Series Data Sheet
Half-Brick with 48VDC Input; 12VDC @ 32A Output
Overvoltage Protection
The output overvoltage protection consists of a
separate control loop, independent of the primary
control loop. This secondary control loop has a
higher voltage set point than the primary loop. In a
fault condition, the converter limits its output voltage
and latches off. This action ensures the output
voltage does not exceed V OVP max. Figure 12 & 13
show operation of the converter during an induced
overvoltage condition.
Figure 12. Induced OVP Behavior (typ)
(Unit A.)
Conditions: Vin = 75 V and Iout = 0 A (no-load).
Induced, fast Vo increase
Channel 1- V OVP = 14.2 VDC (Trip voltage measured),
Scale : 2V/div.
Figure 13. Induced OVP Behavior (typ).
(Unit B.)
Conditions: Vin = 75 V and Iout = 75% load.
Induced, gradual Vo increase
Channel 1- V OVP = 14.8 VDC (Trip voltage, measured),
Scale : 5V/div.
Features Description
ON/OFF Control (ref. figure 16)
-Pxxx suffix model
With the positive logic model, when the ON/OFF pin is
pulled low, the output is turned off and the unit draws
less than 4mA of input current. If the ON/OFF pin is
not used, it can be left floating.
-Nxxx suffix model
With negative logic, when the ON/OFF pin is pulled
low, the unit is turned on. If the ON/OFF pin is not
used, it can be connected to the -Vin pin.
(Common to –Pxxx & –Nxxx versions)
The ON/OFF pin is pulled up internally, so no external
voltage source is required or recommended. The
ON/OFF pin is internally referenced to the –Vin pin.
An open collector switch is recommended to control
the voltage between these two points
The controlling signal must not be referenced ahead
of EMI filtering, or remotely from the unit. Optically
coupling the control signal and locating the opto-
coupler directly, is recommended for trouble-free
operation.
FEB 14, 2006 revised to MAY 17, 2006
Page 9 of 14
www.power-one.com
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