TLD5098EL

LITIX™ Power TLD5098EL - Multitopology LITIX™ Power DC/DC Controller IC 1 Overview Description The TLD5098EL 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 TLD5098EL drives a low side n-channel power MOSFET from an internal 5 V linear regulator. The switching frequency is adjustable in the range from 100 kHz to 500 kHz and can also be synchronized to an external clock source. The TLD5098EL can be flexibly dimmed by means of analog and PWM dimming; an enable function reduces the shut-down current consumption to IQ_OFF < 10 µA. 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. VIN = 4.5V to 45V VIVCC VIN CIN VIVCC RA 14 IN LBO DBO CBO SWO 2 SWCS 4 SGND 3 TSW RCS ROVH TDIM2 S D DZ RDIM2 G ILED RDIM1 RFB VREF IC2 Microcontroller (e.g. XC866) RB PWMI Digital Dimming Clock / Spread Spectrum 10 SET IC1 TLD5098 13 EN / PWMI 11 FREQ / SYNC OVFB 9 FBH 6 IVCC 1 VIVCC CIVCC RPOL ROVL DPOL CCOMP RFREQ RCOMP 8 COMP GND 12 FB...