BD9227F-E2 ROHM

Datasheet 6V to 20V, 1A 1ch PWM Buck Converter Int egrated FET BD9227F General Description Key Specifications The BD9227F is a 20V, 1A non-synchronous PWM duty Input Voltage Range: 6V to 20 V control buck converter with integrated internal high-side Ref. Precision: PWM=H: 2.0 %(1.0 % Ta=25C) 20V Power MOSFET. Operating frequency is 1.0MHz Max Output Current: 1A (Max.) fixed by inner circuit. Current mode control with internal Switching Frequency: 1.0MHz (Typ.) slope compensation simplifies the external compensation Operating Temperature Range: -40 to +85C calculation and reduces component count while allowing the use of ceramic output capacitors. Additional Packages W(Typ) x D(Typ) x H(Max) protection features are included such as Over Current SOP8 5.00mm x 6.20mm x 1.71mm Protection, Thermal Shutdown and Under Voltage Lockout. The BD9227F is available in SOP8. Features Wide Operating Input Range 6V to 20V 20V/200m Internal Power MOSFET 1.0MHz Fixed Operating Frequency Current Mode SOP8 Over Current Hiccup Period Protection Applications Under Voltage Locked Out(UVLO), Over Voltage Home Appliance Protection(OVP), Thermal Shut Down(TSD) VM Motor Available in SOP8 Package. Typical Application Circuits VB NON CNON: CVB: 1uF 0.1uF VCC VCC PWM PWM CVCC: 10uF L1:10uH VOUT LX FB COUT: D1 10uF GND COMP C2: R1: 1.5nF 110k BD9227F R3: 33k R2: 10k Figure 1. Typical Application Circuit Product structureSilicon monolithic integrated circuit This product is not designed for protection against radioactive rays . www.rohm.com TSZ02201-0252AAJ00010-1-2 2016 ROHM Co., Ltd. All rights reserved. 1/26 31.Aug.2017 Rev.002 TSZ2211114001 BD9227F Pin Configuration VB 1 8 NON VCC 2 7 PWM LX 3 6 FB GND 4 5 COMP BD9227F Figure 2. Pin Configuration (TOP VIEW) Pin Description Pin No. Pin Name Function 1 VB Inner voltage regulator output power supply 2 VCC Power supply 3 LX Switch pin of PWM buck 4 GND Ground 5 COMP Compensation node 6 FB Feedback signal 7 PWM PWM input signal 8 NON Inner DC ref voltage Block Diagram VCC VCC VB Current sense AMP UVLO TSD shutdown LVS FET VCC 3V VB VCC-5V LX 1V max VREF VOUT PWM Error Amp ICOMP Logic 3V FB Oscillator 1MHz GND NON COMP Figure 3. Block Diagram www.rohm.com TSZ02201-0252AAJ00010-1-2 2016 ROHM Co., Ltd. All rights reserved. 2/26 31.Aug.2017 Rev.002 TSZ2211115001