参数资料
型号: 20IMX7-03-8
厂商: POWER-ONE INC
元件分类: 电源模块
英文描述: 1-OUTPUT 5 W DC-DC REG PWR SUPPLY MODULE
封装: ROHS COMPLIANT PACKAGE-9
文件页数: 13/14页
文件大小: 321K
代理商: 20IMX7-03-8
BCD20007 Rev AA
Page 8 of 14
www.power-one.com
IMX7 DC-DC Series Data Sheet
7-Watt DC-DC Converters
Fig. 11
Efficiency versus input voltage and load.
Typical values (40IMX7-12-12-8).
Fig. 10
Flexible load distribution on double-outputs models (2
×12 V)
with load variation from 0 to 150% of Po1 nom on output 1.
Output 2 loaded with 25% of Po2 nom.
Vo1, Vo2 [V]
Io1
Io1 nom
05059a
12.8
12.4
12
11.6
11.2
030
60
90
120
150
[%]
Vo2
Vo1
40
50
60
70
80
90
05052a
25
50
75
100 %
Po
Po nom
Vi nom
Vi max
Vi min
η [%]
Auxiliary Functions
Inhibit Function
The output(s) of the converter may be enabled or disabled by
means of a logic signal (TTL, CMOS, etc.) applied to the inhibit
pin. No output voltage overshoot will occur when the unit is
turned on. If the inhibit function is not required the inhibit pin
should be connected to Vi– to enable the output (active low
logic, fail safe).
Converter operating:
–10 V to 0.8 V
Converter inhibited
or inhibit pin i left open:
2.4 V to Vi max
(20/40IMX7)
2.4 V to 75 V
(70/110IMX7)
Adjustable Output Voltage
As a standard feature, all IMX7 converters offer adjustable
output voltage(s) by using a control pin. If this pin is left open-
circuit, the output voltage is set to Vo nom. The output voltage is
adjustable in the range 75 to 105% Vo nom.The circuit works for
single- and double-output models in a different way. For output
voltages Vo > Vo nom, the minimum input voltage Vi min (see
Electrical Input Data) increases proportionally to Vo/Vo nom.
Single-output models with R-input:
The R input (pin 13) is referenced to the secondary side of the
converter. Adjustment of the output voltage is possible by
means of either an external resistor or a voltage source.
a) Adjustment by means of an external resistor:
Depending upon the value of the required output voltage, a
resistor Rext1 or Rext2 shall be connected as shown in the
figure below:
Fig. 12
If the inhibit is not used, the inhibit pin should be
connected to Vi–
Vi+
Vi –
i
06070
R
Vo+
Vo–
Vi+
Vi–
R
ext2
R
ext1
06131a
Fig. 13
Output voltage control with external resistor
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