Company Name: Excellent Integrated System LIMITED

Contact Person : John

Email/Msn     :John(at)eis-ic.com

Tel: 00852-30777742

Add.: RM 906, WORKINGBERG COMM BLDG, 41-47 MARBLE RD, HONGKONG

Excellent Integrated System LIMITED (EIS LIMITED), Established in 1991, is a professional independent stocking distributor of electronic components and specialize in buying the EXCESS STOCK from the original equipment manufacturers (OEMs), Contract equipment manufacturers (CEMs), and many other factories. EIS has gained good experiences in Excess Inventory Management through its development over 20 years and has become the reliable partner for the domestic and foreign OEM manufacturers. If any inquiry and question,please email us: John(at)eis-ic.com.

Description as follow:

The MC34844AEPR2 is a high efficiency, LED driver for use in backlighting LCD displays from 10" to 20"+. Operating from supplies of 7.0 to 28V, the MC34844AEPR2 is capable of driving up to 160 LEDs in 10 parallel strings. Current in the 10 strings is matched to within ±2%, and can be programmed via the I2C/SM Bus interface.

Parametrics

Absolute maximum ratings: (1)Ambient Temperature Range: -40 to 105℃; (2)Junction to Ambient Temperature: 32℃/W; (3)Junction to Case Temperature: 3.5℃/W; (4)Maximum junction temperature: 150 ℃; (5)Storage temperature range: -40 to 150℃; (6)Peak Package Reflow Temperature During Reflow: 260℃; (7)Power Dissipation: 3.9 W at TA = 25℃, 2.5 W at TA = 70℃.

Features

Features: (1)Input voltage of 7.0 to 28V; (2)2.5A integrated boost FET; (3)up to 50 mA on the 34844 LED current per channel; (4)up to 80 mA on the 34844A LED current per channel; (5)90% efficiency (DC:DC); (6)I2C/SM Bus interface; (7)10 channel current mirror with ?% current matching; (8)Boost output voltage up to 60V, with Dynamic Headroom Control (DHC); (9)PWM frequency programmable or synchronizable from 100 to 25,000 Hz for the 34844; (10)PWM frequency programmable or synchronizable from 110 to 27,000 Hz for the 34844A; (11)32-Ld 5x5x1.0mm TQFN Package; (12)Pb-free packaging designated by suffix code EP.

Diagrams