○Product structure：Silicon monolithic integrated circuit ○This product is not designed for protection against radioactive rays

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TSZ02201-0252AAJ00010-1-2

© 2016 ROHM Co., Ltd. All rights reserved.

8.Jun.2016 Rev.001

TSZ22111

・14・001

www.rohm.com

6V to 20V, 1A 1ch

PWM Buck Converter Integrated FET

BD9227F

General Description

The BD9227F is a 20V, 1A non-synchronous PWM duty

control buck converter with integrated internal high-side

20V Power MOSFET. Operating frequency is 1.0MHz

fixed by inner circuit. Current mode control with internal

slope compensation simplifies the external compensation

calculation and reduces component count while allowing

the

use

of

ceramic

output

capacitors.

Additional

protection features are included such as Over Current

Protection, Thermal Shutdown and Under Voltage

Lockout. The under voltage lockout and hysteresis can

be set by external resistor. The BD9227F is available in

SOP8.

Features

■ Wide Operating Input Range 6V to 20V

■ 20V/20

0mΩ Internal Power MOSFET

■

1.0MHz Fixed Operating Frequency

■

Current Mode

■

Over Current Hiccup Period Protection

■

Under Voltage Locked Out(UVLO), Over Voltage

Protection(OVP), Thermal Shut Down(TSD)

■

Available in SOP8 Package.

Key Specifications



Input Voltage Range:

6V to 20 V



Ref. Precision: PWM=H: ±2.0 %(±1.0 %@Ta=25°C)



Max Output Current:

1A (Max.)



Switching Frequency:

1.0MHz (Typ.)



Operating Temperature Range:

-40

℃ to +85°C

Packages

W(Typ) x D(Typ) x H(Max)

SOP8

5.00mm x 6.20mm x 1.71mm

Applications



Home Appliance



VM Motor

Typical Application Circuits

NON

PWM

FB

COMP

BD9227F

VB

VCC

LX

GND

VCC

PWM

10uF

0.1uF

1uF

VOUT

D1

L1:10uH

10uF

R1:

110k

R2:

10k

C2:

1.5nF

R3:

33k

Figure 1. Typical Application Circuit

SOP8

Datasheet