High Performance Switching Regulator Series 60V Synchronous Step-down Switching Regulator(Controller type) BD9610AMUV General Description Key Specifications The BD9610AMUV is a family of high resistance and Input Supply Voltage 10~56 V wide-input voltage (10V to 56V), synchronous, Output Voltage 1.0~(Vin0.8) V step-down switching regulator. BD9610AMUV offers Reference Voltage Accuracy 1.0 % design flexibility with a variety of user-programmable Gate Drive Voltage(REG10) 9~11 V functions, including soft-start, operating frequency, Frequency 50~500 kHz high-side current limit, and loop compensation. BD9610AMUV uses the pulse-width modulation method of the voltage mode, and drives 2 external Nch-FETs. The externally programmable current limit Package provides pulse-by-pulse current limit, as well as VQFN020V4040 4.00 4.00 1.00 hiccup mode operation utilizing an internal fault counter for longer duration overloads.BD9610AMUV Applications is safe for pre-biased outputs, not turning on the Amusement machines synchronous rectifier until the high-side FET has FA Equipments already started switching OA Equipments LED Lighting Equipments Features General Equipments used 24V,48V Bus line High Resistance and Wide Range Input Voltage :VCC=10V~56V Internal Outside FET Gate Driver:REG10=10V 0.8V1.0% Reference Voltage Accuracy Safe for Pre-biased Outputs Adjustable Oscillating Frequency and Soft-Start Master/Slave Synchronize Function Over Current Protection (OCP) Under Voltage Locked Output(UVLO) Thermal Shut-down(TSD) Typical Application Circuit A Type of Efficiency ON/OFF 1F =95% CTL VCC (Vin=34V,Io=10A,fosc=250kHz) Vo VIN 10F4 FB CLH 100 VIN CLL 1k 11k =15-56V 140k RCL 180pF 4700pF 5m 90 20k INV 10k BST SS 80 HG Nch 0.01F SUD23N06-31L (Vishay Siliconix) REG5 0.47F VOUT 70 BD9610AMUV 0.1F Vo =12V LX RTSS 10F4 5H 0.01F (DCR=3m) 60 Vin=34V,Vo=12V RT REG10 220F 75k SYNC LG Nch 50 SUD23N06-31L 1F 0 5 10 15 (Vishay Siliconix) CLKOUT Iout A PGND GND STRUCURESilicon Monolithic Integrated Circuit Not designed to withstand radiation. www.rohm.com TSZ02201-0Q1Q0AJ00010-1-2 2011 ROHM Co., Ltd. All rights reserved. 1/27 TSZ2211114001 24.OCT.2014 Rev.002 Efficiency % BD9610AMUV Pin Configuration Pin Description 15 14 13 12 11 Pin No. Pin Name Description 1 GND GROUND 2 SS Soft-start programming 16 10 3 INV Inverting input to the error amplifier 4 FB Output of the error amplifier 5 RCL Current limit programming 17 6 RT Frequency programming 9 7 RTSS Reference of the RT voltage ( ) 8 CLKOUT Output of Internal clock pulse Thermal Pad 18 9 PGND GROUND 8 10 SYNC Syncronization input for the device 11 LG Gate drive for low-side N-channel FET 19 7 12 REG10 Output of 10V regulator for gate drive 13 LX This pin is connected to the switched node of the converter 14 HG Gate drive for high-side N-channel FET 20 15 BST Gate drive voltage for the high side N-channel FET 6 16 CLL Inverting input to current detector 17 CLH Input to current detector 18 VCC Power supply 19 CTL Shutdown pin 1 2 3 4 5 20 REG5 Output of 5V regulator for internal circuit () Recommend connecting Thermal Pad to GND for increasing radiation characteristic. Block Diagram VCC CTL VCC stb CLH UVLO Pulse by pulse OCP CLL (VCC,REG5, uvlo Hiccup FB REG10) ocp After 2count RCL REG5 stb TSD tsd ocp REG5 uvlo REG5 BST REG5 tsd INV HG ERR DRV LOGIC PWM uvlo SS Low-side 0.8V1% Min. ON LX REG5 VCC stb VCC REG10 10V OSC (Internal/Synchronize) REG REG5 LG REG5 5V DRV stb REG PGND GND RTSS SYNC CLKOUT RT www.rohm.com TSZ02201-0Q1Q0AJ00010-1-2 2011 ROHM Co., Ltd. All rights reserved. 2/27 TSZ2211114001 24.OCT.2014 Rev.002