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参数资料
| 型号： | LT1701-7 |
| 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： | 4/32页 |
| 文件大小： | 1000K |
| 代理商： | LT1701-7 |
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BCD20023 Rev. AA, 3-Sep-2008
Page 12 of 32
www.power-one.com
T Series Data Sheet
500 Watt AC-DC Converters
Table 9: Characteristics of the inhibit signal
Characteristics
Conditions
min
typ
max
Unit
Vinh
Inhibit voltage
Vo = on
Vi min – Vi max,
2.5
60
V
Rinh
Resistance to Vo-
Vo = on
TC min–TC max
30 k
Vinh
Inhibit voltage
Vo = off
– 0.7
0.4
V
Rinh
Resistance to Vo-
VUo = off
50
tr
Switch on time until full power available
Vi nom
100
ms
Pinh
Input power at inhibited converter
Vi nom
3W
Fig. 16
Output voltage Vo versus control voltage Vcr, with the
corresponding signal System Good
50.5
52
53
54
55
56.5
Vo [V]
3
4
5 5.5
11.5
14
16 V
Vcr
Logic level of
the signal
System Good
37.85
39
41
42.37
25.25
26
27
28.25
06069a
T1240
T1840 T1740
Vcr
5.3 V
14 V
If the voltage selector switch Z is not set at 2.23 V per cell, the Vcr
fail voltage rises accordingly.
The inhibit input of battery charger models is not TTL/CMOS
compatible and should be triggered by a switch, a relay, or an
open-collector transistor.
Control by external resistors
With a resistive potential divider or a potentiometer connected
to the remote control input, a fixed output voltage can be
programmed:
Vcr = Vo – 45 V
(T1740)
Vcr = 4/3 Vo – 33.7 V
(T1840)
Vcr = 2 Vo – 45 V
(T1240)
Vo R2
Vcr = ––––––––
(R1 + R2)
R2: Value with 1 MW internal resistance in parallel with R.
It is mandatory that:
(R1 R2)
––-–-–--––
> 35 k
(R1 + R2)
otherwise the converter might not be able to start.
Control by an external voltage source
Fig. 18
Voltage setting by an external voltage source
Fig. 17
Voltage setting by external resistors
Control by the temperature sensor T
The temperature sensor provides a temperature-compensated
charging process for lead-acid batteries; see Accessories,
Temperature Sensor T.
Ext. voltage
source
5.5 – 11.5 V
+
–
Vo–
i/Vcr
Vcr
28
22
05062a
Vo+
i/Vcr
Vo–
1 M
R
Vo–
Vo+
R1
R2 = 1 M R/(1 M + R)
28
Vcr
12
22
05063a
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