LITIX Power TLD5097EL - Multitopology LITIX Power DC/DC Controller IC 1 Overview Description The TLD5097EL is a flexibly usable DC/DC boost controller with built in diagnosis and protection features especially designed to drive LEDs. It is designed to support fixed current and fixed voltage configurations in multiple topologies such as Boost, Buck, Buck-Boost, SEPIC and Flyback by simply adjusting the external components. The TLD5097EL drives a low side n-channel power MOSFET from an internal 5 V linear regulator. The switching frequency is adjustable in the range of 100 kHz to 500 kHz and can also be synchronized to an external clock source. The TLD5097EL can be flexibly dimmed by means of analog and PWM dimming an enable function reduces the shut-down current consumption to I < 10 A. Q OFF The current mode control scheme of this device provides a stable regulation loop maintained by small external compensation components. Additionally an integrated soft start feature limits the current peak as well as voltage overshoot at start-up. This IC is suited for use in the harsh automotive environments. L BO DBO V IN V = 4.5V to 45V IN C C IN BO I LED T SW 2 SWO 14 IN VCC or VIVCC SWCS 4 R V FB REF R R CS A V or V CC IVCC R SGND 3 OVH 10 OVFB 9 D1 RB SET IC 2 Microcontroller ROVL D2 IC 1 (e.g. XC866) D3 TLD5097 5 Diagnosis ST D PWMI 4 6 FBH Digital Dimming 13 EN / PWMI 1 IVCC D 5 RPOL 11 C D Clock / Spread Spectrum FREQ / SYNC IVCC POL D6 8 COMP D7 C COMP FBL 7 D 8 D 9 RFREQ RCOMP GND D10 12 LED load seperated via wire harness Figure 1 Typical application: Boost LED driver Type Package Marking TLD5097EL PG-SSOP-14-3 TLD5097 Datasheet 1 Rev. 1.30 www.infineon.com 2018-10-17 LITIX Power TLD5097EL Potential applications Potential applications Automotive exterior and interior lighting General illumination General purpose current/voltage controlled DC/DC driver Features Fixed current or fixed voltage configuration in Boost, Buck, Buck-Boost, SEPIC and Flyback Topology Drives low side external n-channel switching MOSFET from internal 5 V voltage regulator Flexible switching frequency range from 100 kHz to 500 kHz, synchronization with external clock source Wide input voltage range from 4.5 V to 45 V Enable & PWM function with very low shutdown current: I < 10 A Q OFF Analog dimming and PWM dimming feature to adjust average LED current Low active status output for fault communication Integrated protection and diagnostic functions Internal soft start 300 mV high-side current sense Available in a small thermally enhanced 14-pin PG-SSOP-14-3 package, green product (RoHS) compliant Table1 Product summary Feature Symbol Range Nominal supply voltage range V 8 V ... 34 V IN Extended supply voltage range V 4.5 V ... 45 V IN V > V parameter deviations possible IVCC IVCC,RTH,d Switching frequency range f 100 kHz ... 500 kHz oscillator frequency adjustment FREQ range 250 kHz ... 500 kHz synchronization frequency capture range Maximum duty cycle D 91% ...95% fixed frequency mode max,fixed D 88% synchronization mode max,synced Typical gate driver peak sourcing current I 380 mA SWO,SRC Typical gate driver peak sinking current I 550 mA SWO,SNK Protection and diagnostic functions Open circuit detection Output overvoltage protection Overtemperature shutdown Electrostatic discharge (ESD) protection Product validation Qualified for automotive applications. Product validation according to AEC-Q100/101. Datasheet 2 Rev. 1.30 2018-10-17