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參數(shù)資料
| 型號： | LC020F1 |
| 廠商： | LINEAGE POWER LLC |
| 元件分類： | 電源模塊 |
| 英文描述： | DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 437K |
| 代理商： | LC020F1 |
10
Lineage Power
Data Sheet
April 2008
18 Vdc to 36 Vdc Inputs; 20 W
LC020 Single-Output Series Power Module:
Feature Descriptions (continued)
Remote On/Off
Two remote on/off options are available. Positive logic remote on/off turns the module on during a logic high volt-
age on the REMOTE ON/OFF pin, and off during a logic low. Negative logic device code suffix of “1,” remote on/off
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 termi-
nal and the VI(–) terminal (Von/off). The switch can be an open collector or equivalent (see Figure 19). A logic low is
Von/off = –0.7V to 1.2 V. The maximum Ion/off during a logic low is 1 mA. The switch should maintain a logic low volt-
age while sinking 1 mA.
During a logic high, the maximum Von/off generated by the power module is 6 V. The maximum allowable leakage
current of the switch at Von/off = 6 V is 50 A.
The module has internal capacitance to reduce noise at the ON/OFF pin. Additional capacitance is not generally
needed and may degrade the start-up characteristics of the module.
8-758
Figure 19. Remote On/Off Implementation
Output Voltage Adjustment
Output voltage trim allows the user to increase or decrease the output voltage set point of a module. This is accom-
plished by connecting an external resistor between the TRIM pin and either the VO(+) or VO(–) pins. With an exter-
nal resistor between the TRIM and VO(+) pins (Radj-down), the output voltage set point (VO, adj) decreases. With an
external resistor between the TRIM pin and VO(–) pin (Radj-up), VO,adj increases.
The following equations determine the required external resistor value to obtain an output voltage change of
Δ%:
Device
a
b
c
d
–5% VO Radj-down
+5% VO Radj-up
LC020F
14.0
51.10
5.19
2.70
110.9 k
Ω
52.8 k
Ω
LC020A
4.02
16.90
2.01
2.0
19.3 k
Ω
23.3 k
Ω
LC020B
15.40
1.58
9.80
246.5 k
Ω
16.0 k
Ω
LC020C
21.50
16.90
1.76
12.24
356.3 k
Ω
18.2 k
Ω
+
Ion/off
-
Von/off
REMOTE
ON/OFF
VI(+)
VI(-)
Radj-down
cd
100
Δ%
–
() 100
–
[]
Δ%
--------------------------------------------------------------b
–
k
Ω
=
Radj-up
100a
d
Δ
%
-----------------b
–
k
Ω
=
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