SC445TETRT Semtech

SC445 High Efficiency Integrated Driver for 4-Strings of 150mA LEDs POWER MANAGEMENT Description Features The SC445 is a high-efficiency multiple string WLED driver Wide input voltage range from 4.5V to 27V with an integrated boost converter. It operates over a Sustain fast Vin fluctuation up to 5v/s wide input range from 4.5V to 27V and can sustain fast 42V maximum output voltage Vin transient up to 5V/s. It can drive up to forty WLEDs in Drives up to 40 WLEDs in 4 strings 4 strings with current up to 150mA per string. The string- Programmable LED current for up to 150mA per to-string current matching is 2% typical, 3% maximum. string The overall efficiency is greater than 90% due to the low +/- 2% string-to-string current matching current sense voltage and a low-impedance internal pow- Up to 90% efficiency er switch. The wide PWM dimming range boasts a ratio of Wide 0.2% to 100% PWM dimming range 500: 1. Enable analog dimming Integrated 3.0A power switch The 700KHz switching frequency enables the user to op- 700KHz switching frequency for small size timize the external component sizes for efficiency. When there are fewer than 10 LEDs in each string, users can ad- Adjustable OVP for cost-eeff ctive output cap selection just the output voltage protection yielding an allowable Open/short LED protection reduction in associated costs, size and voltage ratings of Short LED protection enable/disable the output capacitor. Thermal protection with auto-recovery Thermally enhanced TSSOP-20 EDP package The SC445 also features comprehensive open and short- Lead-free, Halogen-Free and WeEE/RoHS Compliant circuit LED protection functions. It disables the corre- sponding strings with LED open or LED short conditions Applications while maintaining normal operation of other, unaffected LED strings. This feature allows LCD panels to remain view- Medium-sized LCD panel able even under LED failure, wire disconnect, or short-cir- Notebook Display cuit conditions. The internal thermal shutdown protects Automotive Car Navigation Display the IC from overheating at abnormal conditions. Sub-Notebook and Tablet Computer Displays Portable Media Players The SC445 is available in a thermally-enhanced TSSOP-20 EDP package. Typical Application Circuit Vin (4.5V -27V) 1 2 SW SW VIN VVOUTOUT 4 Strings SCP EN OVPIN OVPIN EN FFLAG PWM 12 SC445 4 IO1-4 IO1- 4 COMCOMPP IIOSOSEETT AGND AGND IOGND SS SS EDP PPGNDGND PGND Revision 2.1 1 1 X-ON Electronics Largest Supplier of Electrical and Electronic Components Click to view similar products for LED Lighting Drivers category: Click to view products by Semtech manufacturer: Other Similar products are found below : LV5235V-MPB-H MB39C602PNF-G-JNEFE1 MIC2871YMK-T5 AL1676-10BS7-13 AL1676-20AS7-13 AP5726WUG-7 ICL8201 IS31BL3228B-UTLS2-TR IS31BL3506B-TTLS2-TR AL3157F-7 AP5725FDCG-7 LV52204MTTBG AP5725WUG-7 STP4CMPQTR NCL30086BDR2G CAT4004BHU2-GT3 LV52207AXA-VH AP1694AS-13 TLE4242EJ KTD2027EWE-TR AS3688 IS31LT3172-GRLS4- TR TLD2311EL KTD2694EDQ-TR KTZ8864EJAA-TR IS32LT3174-GRLA3-TR MP2488DN-LF-Z NLM0010XTSA1 AL1676-20BS7-13 ZXLD1370QESTTC MPQ7220GF-AEC1-P MPQ4425BGJ-AEC1-P MPQ7220GF-AEC1-Z MPQ4425BGJ-AEC1-Z IS31FL3737B-QFLS4- TR IS31FL3239-QFLS4-TR KTD2058EUAC-TR KTD2037EWE-TR DIO5662ST6 KTD2026BEWE-TR MAX20052CATC/V+ MAX25606AUP/V+ BD6586MUV-E2 BD9206EFV-E2 LYT4227E LYT6079C-TL MP3394SGF-P MP4689AGN-P MPQ4425AGQB- AEC1-Z KTD2060EUAC-TR