BP5250 / BP5250-24

Pin descriptions

Block diagram

CONTROL CIRCUIT

DRIVE CIRCUIT

OVER CURRENT

DETECTION CIRCUIT

1

Vi

2

SW

3

GND

4

IS

5

6

7

Pin No.

Pin name

Function

1

2

3

4

5

6

7

Vi

SW

GND

IS

Vo

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 0.1

µF 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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