MB3775PFV-E1 Просмотр технического описания (PDF) - Fujitsu

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MB3775PFV-E1

BIPOLAR SWITCHING REGULATOR CONTROLLER

Fujitsu 

MB3775

■ HOW TO SET OUTPUT VOLTAGE

The output voltage is set using the connection shown in Fig. 5 and 6.

The error amplifiers are supplied to the internal reference voltage circuit as are the other internal circuits. The

common-mode input voltage range is from −0.2 V to +1.45 V.

When the amplifiers are operated non-inverting, tie the inverting terminal to VREF ( 1.28 V). When the amplifiers

are operated inverting, tie the non-inverting terminal to ground.

Fig. 5 -Connection of Error Amp

Output Voltage V0 is plus

R2

V0+ [V0+ = VREF X (1 + R2/R1)]

+

R1

−

PIN 5 or PIN 12

VREF

R1

VREF

Fig. 6 -Connection of Error Amp

Output Voltage V0 is minus

R2

V0- [V0- = −VREF X (R2/R1)]

−

PIN 5 or PIN 12

+

10

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