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MP1521 Datasheet (PDF) - Monolithic Power Systems

MP1521 Datasheet PDF - Monolithic Power Systems
Part # MP1521
Download  MP1521 Download

File Size   170.85 Kbytes
Page   8 Pages
Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems
Description High Efficiency White LED Driver

MP1521 Datasheet (PDF)

Go To PDF Page Download Datasheet
MP1521 Datasheet PDF - Monolithic Power Systems

Part # MP1521
Download  MP1521 Click to download

File Size   170.85 Kbytes
Page   8 Pages
Manufacturer  MPS [Monolithic Power Systems]
Direct Link  http://www.monolithicpower.com
Logo MPS - Monolithic Power Systems
Description High Efficiency White LED Driver

MP1521 Datasheet (HTML) - Monolithic Power Systems

MP1521 Datasheet HTML 1Page - Monolithic Power Systems MP1521 Datasheet HTML 2Page - Monolithic Power Systems MP1521 Datasheet HTML 3Page - Monolithic Power Systems MP1521 Datasheet HTML 4Page - Monolithic Power Systems MP1521 Datasheet HTML 5Page - Monolithic Power Systems MP1521 Datasheet HTML 6Page - Monolithic Power Systems MP1521 Datasheet HTML 7Page - Monolithic Power Systems MP1521 Datasheet HTML 8Page - Monolithic Power Systems

MP1521 Product details

General Description

The MP1521 is a constant-current Boost Regulator. This IC has three individual current-sensing feedbacks, which are ideal for driving multiple strings of series connected LEDs. The OLS pin is designed for detecting loose or open LED connections.

The IC uses a peak current, constant minimum off-time architecture. The feedback pins measure voltage across sense resistors in series with the LED strings. When supplying a bias current of 20mA, the voltage drop across the sense resistor is only 0.4V to minimize power loss. Either a DC voltage or a PWM signal at the BRT/PWM input can control the LED brightness.

The MP1521 has an on board power MOSFET switch that is protected by current limit, open load shutdown, thermal shutdown, and under voltage lockout.



Features

■ On Board Power MOSFET

■ Drive 9 White LEDs from 2.7V Input

■ Drive 15 White LEDs from 5V Input

■ Up to 90% Efficiency

■ Over 80mA Output Current Capacity

■ Open Load Shutdown

■ Low Current Sensing Feedback Voltage

■ Up to 3 String Current Sensing Feedback

■ Analog and Digital PWM Brightness Control

■ UVLO, Thermal Shutdown

■ Soft Start

■ Internal Current Limit

■ Available in Compact MSOP10 and Tiny 3 mm x 3 mm QFN16 Package

■ Evaluation Boards Available



Applications

■ Handheld Computers, Cell phones, PDAs, Digital and Video Cameras, Small LCD Displays

■ Li Ion and NiMH Battery Applications



 



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