Datasheet 1ch Low Side Switch IC In-Vehicle 1ch Low Side Switch BD1LB500 Series (BD1LB500EFJ-C BD1LB500FVM-C) Features Specifications Built-in overcurrent limiting circuit Built-in thermal shutdown circuit (TSD) Operating voltage range 3.5V to 5.5V Built-in open load detection circuit (at output OFF) ON resistance (25C, Typ.) 350m Enables direct control from CMOS logic ICs, etc. Overcurrent limitation (Typ.) 1.50A Low standby current Active clamp energy (25C) 25mJ Built-in under voltage lock out circuit Built-in diagnostic output (ST) terminal Low ON resistance R =350m (Typ) (V =IN=5V, DS(ON) DD Ta=25C, IOUT=0.25A) Built-in overvoltage protection(active clamp) for output Package circuit HTSOP-J8 4.90mm x 6.00mm x 1.00mm Monolithic power IC in which the control unit (CMOS) MSOP8 2.90mm x 4.00mm x 0.90mm and power MOS FET are incorporated into one chip 1ch low side switch for driving mechanical relay coil (1) AEC-Q100 Qualified (1) Grade1 Overview BD1LB500 Series is an in-vehicle 1ch low side switch. This switch builds in the overcurrent limiting circuit, thermal shutdown circuit, open load detection circuit and under voltage lock out circuit. It also provides the diagnostic output circuit when an abnormality is detected. Application MSOP8 HTSOP-J8 In-vehicle application (Air conditioners, body devices, meters, etc.) Basic Application Circuit (Recommendation) VBAT V RL DD 8 7 6 5 N.C. DRAIN DRAIN VDD Under voltage Open load lock out detection Overvoltage protection Logic Rext (2) 0.1F Over current Limit SOURCE (GND) IN ST SOURCE(GND) 1 2 3 4 10k (3) (2) When the open detection function is required, an external resistance must be added between DRAIN terminal and SOURCE terminal. (3) It is necessary to detect unusual state(ST terminal is low) when VDD terminal is opened. When ST pin is not used, it can be open. Product configuration: Silicon monolithic integrated circuit The product is not designed for radiation resistance. www.rohm.co.jp TSZ02201-0G3G0BD00040-1-2 2015 ROHM Co., Ltd. All rights reserved. 1/16 TSZ2211114001 26.May.2017 Rev.008DatasheetDatasheet BD1LB500 Series Pin Descriptions Pin No. Symbol Function 1 IN Input terminal a pull down resistor is connected internally. Self-diagnostic output terminal outputs L at detection of overcurrent, at open (IN=0V), 2 ST and in the overheat state. See the truth table. It is structured as COMS inverter output circuit. SOURCE 3,4 Ground terminal (GND) Output terminal limits output current to protect IC when load is short-circuited and current 5,6 DRAIN exceeding the overcurrent detection value (0.8A Min) flows to the output terminal. 7 N.C. No Connect pin 8 VDD Power supply terminal The heat radiation metal on the substrate is connected to the IC sub. Therefore, connect (1) Cooling Tab TAB Cooling Tab to the external GND electrical potential (for HTSOP-J8 only). (1)MSOP8 does not have Cooling Tab. Pin Configurations ON resistance Product Name PKG TSD function (25C,Typ) BD1LB500EFJ-C HTSOP-J8 Self-restart 350m BD1LB500FVM-C MSOP8 www.rohm.co.jp TSZ02201-0G3G0BD00040-1-2 2015 ROHM Co., Ltd. All rights reserved. 2/16 TSZ2211115001 26.May.2017 Rev.008