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MBI1801 Datasheet Preview

MBI1801 Datasheet

High Power LED Driver

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Macroblock
Datasheet
MBI1801
All-Ways-OnTM High-Power LED Driver
Features
Constant output current invariant to supply and load voltage change
Maximum output constant current: 1.2A
Output current adjusted through an external resistor
Built-in thermal protection
5V supply voltage
RoHS-compliant package
Surface Mount Device
GSD: TO-265-5L
Product Description
MBI1801 is an instant On/Off LED driver for high power LED applications and exploits PrecisionDriveand
All-Ways-Ontechnology to enhance its output characteristics. At MBI1801 output stage, one regulated current
port is designed to provide a uniform and constant current sink for driving LEDs within a large range of VF
variations.
With All-Ways-On, MBI1801 easily provides users a consistent current source. Users may adjust the output
current from 50 mA up to 1.2A 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. MBI1801 also guarantees that LEDs can be cascaded to maximum 17V at the output
port.
Additionally, to ensure the system reliability, MBI1801 is built with Thermal Protection (TP) function. The TP
function protects IC from over temperature (165°C). Also, the TO package enhances the power dissipation. As a
result, a large amount of current can be sunk safely in one package.
Applications
High-flux LED lighting
Macroblock, Inc. 2012
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
- 1 - September 2012, VA.02




Macroblock

MBI1801 Datasheet Preview

MBI1801 Datasheet

High Power LED Driver

No Preview Available !

MBI1801
All-Ways-OnTM High-Power LED Driver
Function Block Diagram
OUT
R-EXT
VDD
IO Regulator
OE
Figure 1
1 switch
Thermal
Sensor
Pin Configuration
Thermal Pad
MBI1801
1 2 3 45
OE VDD GND R-EXT OUT
MBI1801GSD
Pin Descrption
Pin Name
Function
Output enable terminal
1
When OE is active (low), the output is
OE
enabled; when OE is inactive (high), the
output is turned OFF (blanked).
2
VDD
5V supply voltage terminal
3
GND
Ground terminal for control logic and current
sink
Terminal used to connect an external
4 R-EXT resistor (Rext) for setting up output current
for the output channel
5
OUT
Constant current output terminal
-
Thermal Pad
Power dissipation terminal connected to
GND*
*To eliminate the noise influence, the thermal pad is suggested to be
connected to GND on PCB.
In addition, desired thermal conductivity will be improved, if a
heat-conducting device is screwed with thermal pad.
- 2 - September 2012, VA.02


Part Number MBI1801
Description High Power LED Driver
Maker Macroblock
PDF Download

MBI1801 Datasheet PDF






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