MBI1804 Datasheet | Macroblock

Features z 4 constant-current output channels z Constant output current invariant to load voltage change z Maximum output constant current per channel: 240m A z Excellent output current accuracy: between channels: <±3% (max.), and between ICs: <±6% (max.) z Output current adjusted through an external resistor z Schmitt trigger input z 5V supply voltage z Package type: “Pb-free & Green” SOP8 with thermal pad Small Outline Package GDGD: :SSOOPP88-1L5-01-15.027-1.27 Current Accuracy Between Channels Between ICs < ±3% < ±6% Conditions IOUT = 40 ~ 240 m A Product Description MBI1804 is an instant On/Off LED driver for high power LED applications and exploits Precision Drive™ and All-Ways-On™ technology to enhance its output characteristics. At MBI1804 output stage, four regulated current ports are designed to provide uniform and constant current sinks for driving LEDs within a large range of VF variations. With All-Ways-On™, MBI1804 provides users 4-channel constant current ports. Users may adjust the output current from 40 m A up to 240m A through an external resistor, Rext, which gives users flexibility in controlling the light intensity of LEDs. In addition, users can precisely adjust LED brightness from 0% to 100% via output enable ( OE ) with Pulse Width Modulation. Additionally, to ensure the system reliability, MBI1804 is built with TP (Thermal Protection) function and thermal pad. The TP function protects IC from over temperature (165°C). Also, the thermal pad enhances the power dissipation. As a result, a large amount of current can be handled safely in one package. ©Macroblock, Inc. 2009 Floor 6-4, No.18, Pu-Ting Rd., Hsinchu, Taiwan 30077, ROC. TEL: +886-3-579-0068, FAX: +886-3-579-7534 E-mail: info@mblock..tw -1- Jan. 2009, VA.00 All-Ways-On TM High-Power LED Driver Applications z High-flux LED lighting z Automotive interior lighting z LCD backlight z Photocopier z Scanner Typical Application Circuit Rext 1 GND 2 R-EXT 3 OUT0 4...