MP1529

MP1529

NOT RECOMMENDED FOR NEW DESIGNS

2.7V-5.5Vin, 25Vout, 3-Channel Boost WLED Driver Plus Flash Light

ALTERNATIVE PART

NRFND Datasheet

MP1529 continues to be in production for existing customers. Please consider this alternative for new designs:

MP1517

3A, 25V, 1.1MHz Step-Up Converter

Features & Benefits

4A Peak Current Limit
Low 700mV Feedback Threshold
Internal 150mΩ Power Switch
Input Range of 2.6V to 25V
Up to 95% Efficiency
Zero Current Shutdown Mode
Under Voltage Lockout Protection
Open Load Protection
Soft-Start Operation
Thermal Shutdown
Tiny 4x4mm 16-Pin QFN Package

… and many more!

Description

The MP1529 is a step-up converter for driving two 6LED backlight strings to 30mA and a 4LED flash string to 150mA from a single Lithium-Ion battery. The step-up converter generates an output voltage as high as 25V from a 2.7V to 5.5V input source. Three current sources drive in three modes. In backlight mode two strings of 6 LEDs are lit with up to 30mA of current. In the backlight plus preview mode the 4 flash LEDs are lit with the preview current. In flash mode the flash LEDs are lit with up to 150mA of current and the two backlight strings are turned off. There are three pins to independently set the backlight, preview and flash current. The MP1529 includes built-in open lamp over voltage protection, cycle-by-cycle current limit, over temperature shutdown, input under voltage control and integrated soft-start. The MP1529 is available in a tiny 16-pin 4mm x 4mm package.

Features & Benefits

2.7V to 5.5V Input Voltage Range
25V Maximum Step-Up Voltage
<1µA Shutdown Mode
1.2MHz Fixed Frequency Operation
LCD Backlight to 30mA, Flash to 150mA
Cycle-By-Cycle Current Limit
Independent Backlight, Preview and Flash Current Adjustment
Special PWM Dimming
Over Voltage Protection
Under Voltage Lockout
Integrated Soft-Start
Thermal Shutdown
Tiny 4mm x 4mm QFN Package

Active Part Numbers:

MP1529DR-LF-P MP1529DR-LF-Z MP1529DR-LF MP1529XN

Meaning of P & Z

Evaluation Tools

EV1529DR-00A Evaluation Kit Fixed Frequency Step-Up Converter LCD Backlight Plus Flash Evaluation Board

The EV1529DR-00A evaluation board is designed to drive 2 strings of up to 4 backlight LEDs to 30mA and a 4-LED flash string to 150mA from a single Lithium-Ion battery. The board is set up to obtain 20mA backlight current, 40mA preview current and 100mA flash current. All the LED currents can be adjusted by resistors RS1, RS2, and RS3 on the evaluation board.

The MP1529 switches at 1.2MHz and allows the use of tiny, low cost capacitors and small inductors. High frequency PWM dimming is made possible through EN1. The MP1529 includes built-in open-LED over-voltage protection, cycle-by-cycle current limit, over-temperature shutdown, input under-voltage control and integrated soft-start.

$25.00
+ tax

Design Resources

Symbol, Footprint & 3D Model

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