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參數(shù)資料
| 型號(hào)： | DW025ABK-M |
| 元件分類： | 電源模塊 |
| 英文描述： | 3-OUTPUT 25 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 4/20頁 |
| 文件大?。?/td> | 774K |
| 代理商： | DW025ABK-M |
12
Tyco Electronics Corp.
Data Sheet
June 1997
36 Vdc to 75 Vdc Input; 25 W
DW025 Triple Output-Series Power Modules:
Feature Descriptions
Output Overvoltage Clamp
The output overvoltage clamp consists of control cir-
cuitry, independent of the primary regulation loop, that
monitors the voltage on the output terminals. The con-
trol loop of the clamp has a higher voltage set point
than the primary loop (see Feature Specifications
table). This provides a redundant voltage control that
reduces the risk of output overvoltage.
Current Limit
To provide protection in a fault (output overload) condi-
tion, the unit is equipped with internal current-limiting
circuitry. At the point of current-limit inception, the unit
shifts from voltage control to current control. If the out-
put voltage is pulled very low during a severe fault, the
current-limit circuit can exhibit either foldback or
tailout characteristics (output current decrease or
increase). The unit operates normally once the output
current is brought back into its specified range.
Output Voltage Set-Point Adjustment
The output voltage adjustment feature provides the
capability of increasing or decreasing the output volt-
age set point of a module. When the output voltage
adjustment feature is used, the output voltage set point
of all three outputs is adjusted.
The output voltage adjustment can be accomplished by
using an external resistor connected between the TRIM
pin and either the VO1(+) or common pins. With an
external resistor between the TRIM and common pins
(Radj-up), the output voltage set point (VO, adj) increases.
Note: The output voltage adjustment range must not
exceed 110% of the nominal output voltage
between the VO1(+) and common terminals.
With an external resistor connected between the TRIM
and VO1(+) pins (Radj-down), the output voltage set point
(VO, adj) decreases.
Note: The output voltage adjustment must be 90% or
more of the nominal output voltage between the
VO1(+) and common terminals.
Remote On/Off
Two remote on/off options are available. Positive logic
remote on/off turns the module on during a logic high
voltage on the REMOTE ON/OFF pin, and off during a
logic low. Negative logic remote on/off, suffix code “1,”
turns the module off during a logic high and on during a
logic low.
To turn the power module on and off, the user must
supply a switch to control the voltage between the
on/off terminal and the VI(–) terminal (Von/off). The
switch can be an open collector or equivalent (see
imum Ion/off during a logic low is 1 mA. The switch
should maintain a logic low voltage while sinking 1 mA.
During a logic high, the maximum Von/off generated by
the power module is 10V. The maximum allowable
leakage current of the switch at V on/off = 10 V is 50 A.
8-758(C).a
Figure 21. Remote On/Off Implementation
Radj-up
42.35
VO, adj
VO, nom
–
----------------------------------
k
=
Radj-down
VO, adj
2.5
–
() 16.94
×
VO, nom
VO, adj
–
-------------------------------------------------
k
=
+
Ion/off
-
Von/off
REMOTE
ON/OFF
VI(+)
VI(-)
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| DW025ACL81-M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC-to-DC Voltage Converter |
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