Automotive LED Drivers Selection Guide Ver.2.3 Creating the future of Automobiles

Automotive LED Drivers Selection Guide INDEX Application Configuration Examples LED Driver Lineup for Automotive Lamps Switching Buck LED Drivers Buck LED Drivers featuring Fixed Switching Frequency Control Buck LED Drivers featuring OFF Time Control Switching Boost LED Drivers Multi-Channel Switching LED Driver 1ch Boost + 2ch Buck LED Driver Matrix Switch Matrix LED Controller with Built-in Pattern BD18345EFV-M with Enhanced DC Dimming Function Ultra-Compact Linear LED Driver Linear LED Drivers with Built-in FET Linear LED Driver Lineup PBUS Function IPD (Intelligent Power Device) Intelligent...

Application Configuration Examples Application High/Low Beam, DRL, Fog, Position p Multiple LEDs Simple Drive Buck converter Few LE ew LEDs Hig H gh Current Load t Load L d High Simple Drive Buck-Boost converter  Under Planning Small Size Few LEDs Low Current Load Controller type Internal MOSFET Matrix SW/ADB MOSFET: RSx/RSD series(P.17) Diode: RBR/RBxx8 series(P.18) Shunt Resistor: LTR series(P.19) Chip Resistor: SFR series(P.20) Linear Driver  Under Planning PNP Transistor: 2SAR573(P.17) MOSFET: RJU003N03(P.17) LED: PSL030x series(P.17) Chip Resistor: SFR series(P.20) Co ve Conventional Turn...

Buck LED Drivers featuring Fixed Switching Frequency Control BD18394EFV-M/BD18394MUF-M Key Features ■ Synchronous rectification buck LED drivers ■ Hysteresis function ■ Operating voltage range: 5.0V to 70V ■ LED voltage range: 2.0V to 60V ■ Switching frequency: 100kHz to 500kHz ■ Fixed switching frequency control ■ Spread spectrum function ■ High-side LED current detection function ■ PWM/DC dimming function ■ Supports matrix drive ■ LED open/short detection function ■ UVLO, TSD, OCP functions Block Diagram Target Applications Package ■ High/Low Beam ■ Tail-Stop Lamp, DRL ■ Position/Turn Lamp...

Under Development Buck LED Drivers featuring OFF time control (built-in switch FET)BD18391EFV-M/BD18395EFV-M Block Diagram Key Features ■ Buck LED drivers with built-in FET featuring OFF time control ■ Hysteresis control ■ Operating voltage range: 4.5V to 70V ■ LED voltage range: 0V to 60V ■ LED current setting range: 0.1A to 1.0A(BD18391EFV) 0.2A to 2.0A(BD18395EFV) ■ Switching frequency: 25kHz to 1MHz ■ Standby current: 0|jA(Typ) ■ Output ON resistance: 0.17O(Typ) ■ PWM/DC dimming function ■ Supports matrix drive (output capacitance: less than10nF) ■ High-side LED current detection function...

BD18351EFV-M Key Features ■ 1ch boost LED driver ■ Operating voltage range: 4.5 to 65V ■ Boost voltage range: 6.0 to 65V ■ High accuracy power supply: 2.5V±3% ■ LED current accuracy: ±3%(-40°C to +125°C) ■ Switching frequency: 200kHz to 700kHz ■ PWM/DC dimming function ■ Built-in PWM generator ■ High-side LED current detection function ■ Spread spectrum function ■ LED open/short protection function ■ UVLO, TSD, OCP functions ■ Self-diagnostic function(FAIL) Block Diagram Target Applications ■ High/Low Beam ■ Tail-Stop Lamp, DRL ■ Position/Turn Lamp Spread Spectrum Function • Spread spectrum(spread...

Under Development Block Diagram ■ Operating voltage range: 5.0V to 65V ■ Boost voltage range: up to 60V Internal Regulator DC/DC Control Analog Dimming ■ Integrated Pch MOSFET driver for PWM dimming ■ Spread spectrum function ■ High-side LED current detection function ■ PWM/DC dimming function PGND OPUD Current Sense SNSN PDRV ■ LED open/short protection function ■ UVLO, UVD, OVP, OCP, TSD functions ■ Diagnostic function(FAULT_B) Target Applications ■ High/Low Beam ■ Tail-Stop Lamp, DRL ■ Position/Turn Lamp HTSSOP-B20 W(Typ) BD18353EFV-M and BD18353MUF-M each have 2 DC dimming terminals(DCDIM1...

Under Development 1 1ch Boost + 2ch Buck LED Driver Block Diagram ■ 1ch boost power supply + 2ch buck LED driver Boost block: Current mode DC/DC controller Buck block: Buck LED driver featuring OFF time control ■ Operating voltage range: 5.5V to 50V Control signals ■ PWM/DC dimming function VSENS COMP Control Logic BSTCLK Control signals Diagnostics Select A/D input Target Applications ■ LED open/short protection function ■ Peak current correction function Control signals ■ Limp home function ■ Supports matrix drive(output capacitance ≤10nF) ■ High-side LED current detection function ■ LED settable...

Under Development M Matrix LED Controller with Built-in Pattern Block Diagram ■ Input voltage range: 5.5V to 60V Internal Regulator Internal Oscillator VREG SETDLY ■ Sequential lighting pattern built-in VCP Local power supply Diag & Gate Driver Level Shift Local power supply Diag & Gate Driver Level Shift Local power supply Diag & Gate Driver Level Shift Local power supply ■ 2 LEDs can be connected to each switch External Supply Diag & Gate Driver Level Shift Diag & Gate Driver Level Shift Local power supply VCP Local power supply ■ Internal sequential lighting time setting function Charge Pump...

Block Diagram ■ 4ch linear LED drivers with built-in FET ■ Operating voltage range: 5.5V to 20V ■ Max output current: 150mA/ch(Total: 500mA) ■ Output current accuracy: ±5%(Ta=−40˚C to +125˚C) Power Control ■ Power Shift function ■ License lamp mode ■ LED open detection mask function ■ LED open/output short detection function ■ Overvoltage mute function: VIN>20V(Min) Control Logic SET Terminal Short Detect VBG Current Setting Target Applications With BD18337EFV-M and BD18347EFV-M, individual PWM dimming can be done by connecting an Nch MOSFET to each channel. The delay time for the PWM signal...

Power Shift Function ● Power shift function simplifies thermal design of LED driver board by adding external resister. With conventional linear LED drivers, thermal design is difficult in high power applications due to the constraints for permissible package power loss. In contrast, BD18337EFV-M and BD18347EFV-M dissipates the power ,which is consumed internally with conventional linear LED driver, externally with resistor(REXT) added between VIN and VINRES. Thus IC temperature increase is minimized. The voltage between VINRES pin and OUT1-4 pins are controlled to be less than 2.0V. VINRES REXT...