DATASHEET ISL78100 FN6626 Rev 1.00 High Power LED Driver December 24, 2013 The ISL78100 is a high-power LED backlight driver with an Features integrated 36V FET designed to drive up to 8 high-power Drives 3 to 8 high-power LEDs in series, up to 32V LEDs in series. The PWM converter runs from an internally generated 1MHz clock. With efficiencies over 90%, the 2.7V to 16V input voltage range regulator provides tight control of LED current and may be Boost or Buck configurable switch configured in either boost or buck topologies, allowing from 3A integrated FET 3 to 8 series diodes to be driven from wide input voltages. Automotive load dump protection LED light level may be controlled either by: Light output temperature compensation 1. LED DC bias current set via the LEVEL pin, or 2. External low frequency PWM control via the LED over-temperature protection ENABLE/PWM pin. LED disconnect In both control modes, optional over-temperature thermal PWM/analog light level control protection of the LED reduces the LED DC bias current above an adjustable set temperature, protecting the LED Small, 20 Ld 4mmx4mm QFN package from thermal damage. An optional fault monitor drives an AEC-Q100 Compliant external FET between the input supply and inductor, providing short circuit current protection for the LED and Pb-free (RoHS compliant) inductor as well as load dump protection for automotive Applications applications. For low cost applications the pass transistor may be omitted and the fault pin bypassed. Automotive display backlighting The ISL78100 is packaged in a 20 Ld 4mmx4mm QFN Automotive LED lighting package and is specified for operation over the -40C to +105C temperature range. Pinout ISL78100 Ordering Information (20 LD 4X4 QFN) TOP VIEW PART NUMBER PART PACKAGE PKG. (Note) MARKING (Pb-free) DWG. ISL78100ARZ 781 00ARZ 20 Ld 4x4 QFN L20.4x4C ISL78100ARZ-TK* 781 00ARZ 20 Ld 4x4 QFN L20.4x4C VDC 1 15 ENL Tape and Reel VHI 2 14 MODE ISL78100ARZ-T* 781 00ARZ 20 Ld 4x4 QFN L20.4x4C THERMAL Tape and Reel OVP 3 13 EN/PWM PAD *Please refer to TB347 for details on reel specifications. SWD1 4 12 SWS1 NOTE: These Intersil Pb-free plastic packaged products employ special Pb-free material sets molding compounds/die attach 5 SWD2 11 SWS2 materials and 100% matte tin plate PLUS ANNEAL - e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. FN6626 Rev 1.00 Page 1 of 20 December 24, 2013 BUCK/BOOSTN 6 20 VIN LEVEL 7 19 FAULT TEMP 8 18 GND FB 9 17 NC TMAX 10 16 VBATISL78100 Absolute Maximum Ratings (T = +25C) Thermal Information A Maximum pin voltage, all pins except below 6.5V Thermal Resistance (C/W) / (C/W) JA JC VIN SWS1, SWS2, EN/PWM .18V , 20 Ld QFN Package (Notes 1, 2) . 39 2.5 VBAT, FAULT, FB .24V Maximum Junction Temperature +135C VHI - SWS1, SWS2 . 6.5V Storage Temperature .-65C to +150C SWD1, SWD2, OVP .34V Pb-free reflow profile see link below Continuous Output Current 1A