参数资料
型号: LT1702-7D
厂商: POWER-ONE INC
元件分类: 电源模块
英文描述: 1-OUTPUT 550 W AC-DC REG PWR SUPPLY MODULE
封装: CASE T01, MODULE
文件页数: 6/33页
文件大小: 838K
代理商: LT1702-7D
T Series
AC-DC Converters >100 Watt
Rugged Environment
Edition 4/4.99
14/33
MELCHER
The Power Partners.
Ext. voltage
source
5.5...11.5 V
+
Vo–
i/Ucr
Ucr
28
22
05062
Fig. 23
Voltage setting by an external voltage source
Remote control by a resistive potential divider
With a resistive potential divider or a potentiometer con-
nected to the remote control input, a fixed output voltage
can be programmed:
Fig. 22
Voltage setting by a resistive potential divider
Ucr = Uo – 45 V
(LT/UT 1740)
Ucr = (Uo – 33.75 V) 4/3
(LT 1840)
Ucr = 2 Uo – 45 V
(LT/UT 1240)
Uo R2
Ucr = ––––––––
(
R1 + R2)
R2: Value with 1 M internal resistance in parallel with R.
It is mandatory that:
(
R1 R2)
–––––––
>35 k
(
R1 + R2)
otherwise the unit might not be able to start.
Vo+
i/Ucr
Vo–
1 M
R
Uo
Uo+
R1
R2 = 1 M R/(1 M + R)
28
Ucr
12
22
05063
Fig. 24
Voltage setting by a temperature sensor, wiring diagram
The Melcher temperature sensor provides a temperature
compensated charging process for lead acid batteries, see
also:
Temperature Sensors.
+
Battery
Vo+
i/Ucr
Vo–
Temperature
sensor
Sensor
cable
Sensor
wires
+
28
05064
12
22
Remote control by a temperature sensor
Remote control by an external voltage source.
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