BP5250 Просмотр технического описания (PDF) - ROHM Semiconductor

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BP5250

DC/DC converter

ROHM Semiconductor 

Block diagram

BP5250 / BP5250-24

CONTROL CIRCUIT

DRIVE CIRCUIT

OVER CURRENT

DETECTION CIRCUIT

1

2

3

4

5

VCTL

Vi

SW

GND

IS

6

7

VO

VADJ

Pin descriptions

Pin No. Pin name

1

VCTL

2

Vi

3

SW

4

GND

5

IS

6

Vo

7

VADJ

Function

Power save terminal.Setting the voltage on this terminal to Low or high impedance turns the

output OFF. Normally connect to Vi for use.

Input voltage terminal. Inserting a bypass capacitor of 0.1µF between this and pin 4 GND is

recommended.

Terminal to drive the external FET gate.

GND terminal. Connect the negative terminal of the I/O smoothing capacitor and the anode terminal

of the flywheel diode nearby.

Overcurrent detection terminal. The value of the resistor inserted between this and pin 6 sets the

output current capacity.

Output voltage monitor terminal.

Output voltage setting terminal. The values of the resistors inserted between this and pin 6 and

between this and GND set the output voltage capacity.

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