MB39A103 Datasheet, PDF (20/33 Pages) List of Unclassifed Manufacturers – 4-Channel DC/DC Converter IC with Support for Low Voltage

MB39A103
■ POWERR SUPPLY EXAMPLE USING CH4 FOR SELF-POWER SUPPLY
The MB39A103 can be started with the low input voltage (VIN ≥ 1.7 V) if the CH4 is used as a self-power supply.
An example of supply the power using the transformer is shown below.
• Power supply example using CH4 for self-power supply
VCCO
2
VIN
OUT4
22
−INE4
D
17
VREF
Error
Amp4
GNDO
21
CS4
−
16
+
+
FB4
18
1.24 V
VCC
5
D
VO4-1
15 V
VO4-2
5V
VO4-3
−7.5 V
Setting shown in the “■❨APPLICATION EXAMPLE” is as follows:
• Number of windings for VCC and VCCO is set to the value equivalent to VIN + 2.5 V.
CH1 to CH3 are operational on VCC ≥ 2.5 V; in order for the CH1 to CH3 to operate on VIN ≥ 1.7 V, the number
of windings should be set equivalent to VIN + 0.8 V or more for VCC and VCCO.
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