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参数资料
| 型号： | LS2540-7EPD0B1 |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 2-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| 封装： | METAL, CASE S02, MODULE |
| 文件页数： | 19/33页 |
| 文件大小： | 438K |
| 代理商： | LS2540-7EPD0B1 |
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S Series Data Sheet
100 Watt AC-DC and DC-DC Converters
APR 26, 2006 revised to SEP 25, 2006
Page 26 of 33
www.power-one.com
Option D: Undervoltage Monitor
The input and/or output undervoltage monitoring circuit operates
independently of the built-in input undervoltage lockout circuit. A
logic "low" (JFET output) or "high" signal (NPN output) is
generated at pin 20 as soon as one of the monitored voltages
drops below the preselected threshold level Vt. The return for
this signal is Vo1–. The D output recovers when the monitored
voltage(s) exceed(s) Vt + Vh. The threshold levels Vti and Vto
are either adjustable by a potentiometer, accessible through a hole
in the front cover, or factory adjusted to a fixed value specified by
the customer.
Option D exists in various versions D0 - DD as shown in the
following table.
Table 20: Undervoltage monitor functions
Output type
Monitoring
Minimum adjustment range
Typical hysteresis
Vh [% of Vt]
of threshold level
Vt
for
Vt min - Vt max
JFET
NPN
Vi
Vo1
Vti
Vto
Vhi
Vho
D1
D5
no
yes
-
3.5 - 40 V
1
-
2.5 - 0.6
D2
D6
yes
no
Vi min - Vi max
1
-
3.4 - 0.4
-
D3
D7
yes
Vi min - Vi max
1
(0.95 - 0.985
Vo1)
2
3.4 - 0.4
"0"
D4
D8
no
yes
-
(0.95 - 0.985
Vo1)
2
-
"0"
D0
D9
no
yes
-
3.5 - 40 V
3
-
2.5 - 0.6
yes
no
Vi min - Vi max
3, 4
-
3.4 - 0.4
-
yes
Vi min - Vi max
3, 4
3.5 - 40 V
3
3.4 - 0.4
2.5 - 0.6
yes
Vi min - Vi max
3, 4
(0.95 - 0.985
Vo1)
2
3.4 - 0.4
"0"
-DD
yes
Vi min - Vi max
1
3.5 - 40 V
1
3.4 - 0.4
2.5 - 0.6
1 Threshold level adjustable by potentiometer
2 Fixed value tracking if Vo1 is adjusted via R-input, option P or sense lines.
3 The threshold level is permanently adjusted according to customer specification ±2% at 25 °C. Any value within the
specified range is possible, but causes a new customer-specific type designation.
4 Adjusted at Io nom
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