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参数资料
| 型号： | 48IMS7-05-9Z |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 6.1 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 8/14页 |
| 文件大小： | 174K |
| 代理商： | 48IMS7-05-9Z |
REV. JUN 14, 2004
3/14
Functional Description
The IMS 7 DC-DC modules are feedback controlled flyback
converters using current mode PWM (Pulse Width Modula-
tion).
In the case of the single output units the output is directly
monitored and fed back to the primary control circuit via a
pulse transformer, resulting in tight regulation of the output
voltage. The R input is referenced to the secondary side
and allows for programming of the output voltages in the
range 75 to 105% of
Uo nom using either an external resistor
or an external voltage source.
In the case of the double output units the output voltage is
monitored by a separate transformer winding close to the
secondary windings and fed back to the control circuit. The
R-input is referenced to the primary side and allows pro-
gramming of the output voltage in the range 100 to 105% of
Uo nom by an external resistor or within 75 to 105% of Uo nom
using an external voltage source.
Current limitation is provided by the primary circuit, thus
limiting the total output current (
Io nom for the single and
Io1 nom + Io2 nom for the double output types).
The inhibit input allows remote converter shutdown.
PWM
2
× 2200 pF, 1500 V
10 nF
14
1
2
3
4
11
10
12
13
Vi+
(Trim)
R
i
Vi –
Vo1
Vo2
n.c.
03026
Fig. 2
Block diagram, double output types, standard pinout
Fig. 1
Block diagram, single output types, standard pinout
PWM
2
× 2200 pF
1500 V
13
1
2
3
4
11
10
12
14
Vi+
i
Vi–
n.c.
Vo+
Vo–
R
n.c.
03025
PWM
2
× 2200 pF, 1500 V
10 nF
1
2
3
10
5
Vi+
Vi –
Vo+
Go
Vo –
03040
Fig. 4
Block diagram, dual output types, C pinout
Fig. 3
Block diagram, single output types, C pinout
PWM
2
× 2200 pF
1500 V
1
2
13
15
Vi+
Vi–
Vo+
Vo–
03039
17 R
4
SD
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