MBI1804
Preliminary Datasheet
Macroblock
All-Ways-OnTM High-Power LED Driver
Features
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4 constant-current output channels
Constant output current invariant to load voltage change
Maximum output constant current: 360 mA
Excellent output current accuracy:
between channels: <±3% (max.), and
CD: SOP8-150-1.27
between ICs: <±6% (max.)
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Output current adjusted through an external resistor
Fast response of output current,
Schmitt trigger input
(min.): 10μs
OE
5V supply voltage
Package type: SOP8 with thermal pad
Current Accuracy
Conditions
IOUT = 40 ~ 240 mA
Between Channels
Between ICs
< ±3%
< ±6%
Product Description
MBI1804 is an instant On/Off LED driver for high power LED applications and exploits PrecisionDrive™ 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 easily a consistent current source in their system design. Users may
adjust the output current from 20 mA up to 360 mA 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 control with Pulse Width Modulation. MBI1804 also guarantees LED can be cascaded to maximum 17V at
the output ports.
Additionally, to ensure the system reliability, MBI1804 is provided in the SOP8 with thermal pad for dramatically
increased power dissipation capability. As a result, a large amount of current can be handled safely in one
package.
ÓMacroblock, Inc. 2004
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.com.tw
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November 2004, V1.00