Click here to ask an associate for production status of specific part numbers. Automotive Four-Switch Buck-Boost LED MAX25603 Controller for Combination Head Lights General Description Benefits and Features The MAX25603 is a synchronous four-switch, buck- Automotive Ready: AEC-Q100 Qualified boost LED driver controller suitable for multifunction Integration Minimizes BOM for High-Brightness LED automotive combination head lamps. The controller Driver, Saving Space and Reducing Cost regulates the LED current for LED string voltages from Wide Input Voltage Range from 5V to 60V 0V to 60V. The MAX25603 can be used as a seamless H-Bridge Single Inductor Buck-Boost Architecture buck-boost LED driver for applications that require an Built-In Fast LED Current Limit During Transients efficient buck-boost LED driver with synchronous Suitable for Dual-String Applications with Time- rectification. The MAX25603 is ideal for high-power Sharing applications that require a current source with PWM 28-Pin TSSOP with EP Pad dimming capability. Full Featured Dual String Driver The device provides seamless transition between buck, Analog and PWM Dimming on Both Channels boost, and buck-boost modes depending on the ratio of (EN1 and EN2) input to output voltage. The MAX25603 is ideal for LED Analog Devices Proprietary Control Architecture driver applications in automotive, industrial, and other Limits LED Current Spikes and Spike Duration in LED lighting applications. A fault flag indicates open LED Dual-String Mode or thermal shutdown conditions. The device uses Analog Flicker-Free PWM Dimming with Spread- Devices proprietary average-current-mode control Spectrum scheme and allows adjustable 200kHz to 440kHz fixed- Dual Integrated pMOS Dimming FET Gate Driver frequency operation. In addition, 6% triangular spread- Protection Features and Wide Temperature Range spectrum is added internally to the oscillator to improve Increase System Reliability EMI performance. The MAX25603 provides both analog Short Circuit, Overvoltage, and Thermal and digital PWM dimming in dual string applications with Protection time sharing. A single device can be used to power a Fast LED Current Limit and Input Current Limiter daytime running light (DRL), position light, high beam, -40C to +150C Operating Junction-Temperature and low beam in an automotive front headlamp. The Range MAX25603 integrates two high-side pMOS drivers for PWM dimming applications that require fast rising and falling edges of the LED current. It also features robust Ordering Information appears at end of data sheet output open and short protection, is AEC qualified, and is suitable for automotive applications. The MAX25603 uses Analog Devices proprietary architecture to limit LED current overshoots and overshoot durations during switchover in dual-string applications in time-sharing mode. In multistring applications in time-sharing mode, LED current overshoots during switchover between strings is minimized by an Analog Devices proprietary control scheme. Applications Combination Automotive Head Lamps 19-101257 Rev 0 12/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved. MAX25603 Automotive Four-Switch Buck-Boost LED Controller for Combination Head Lights Simplified Application Diagram RIN VOUT INPUT COUT INP INN IN N3 DH2 C N1 IN DH1 L1 LX2 LX1 CLL/DRL+LB / HB EN1 N2 DL2 DL1 N4 EN2 CLL / DRL ANALOG ICTRL R SLOPE DIMMING VOUT CSP CLL SHUNT ISP R SE NS E MAX25603 FLT R LED CSN ISP ISP LX2 LX2 ISN ISN ISN DL2 DL2 GTP2 COMP1 DH2 DH2 P2 GTP1 C GTP1 COM P1 GTP1 CLL / DRL P1 GTP2 GTP2 RCOM P1 COMP2 C COM P2 LOW/HIGH BEAM R COM P2 www.analog.com Analog Devices 2