MP3305 5V, 1.3A, 2.2MHz Step-up White LED Driver QFN8

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MP3305 5V, 1.3A, 2.2MHz Step-up White LED Driver QFN8

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pMPS MP3305 — Step-up White LED Driver, 5V input, 1.3 A output, QFN8./p

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MPS QFN8 LED Drivers LED Power Management Step-Up

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MP3305 5V, 1.3A, 2.2MHz Step-up White LED Driver QFN8

The MPS MP3305 is a Step-up White LED Driver. It accepts up to 5 V at the input, is rated for 1.3 A and switches at 2.2 MHz. It is supplied in a QFN8 package.

The MP3305 is a monolithic step-up converter designed for driving arrays of WLEDs from 5V input or a single cell Lithium Ion battery.

Key Specifications

Part Number	MP3305
Function	Step-up White LED Driver
Input Voltage	up to 5 V
Current Rating	1.3 A
Switching Frequency	2.2 MHz
Interface	PWM
Peak Efficiency	88%
Package	QFN8
Ordering Codes	MP3305

Features

Internal Power MOSFET
Drives up to 10 Series White LEDs
Up to 88% Efficiency
PWM Dimming Frequency from 250Hz to 50kHz
2.2MHz Fixed Switching Frequency
Adjustable Open Load Shutdown Threshold (OVP)
Low 200mV Feedback Voltage
UVLO, Thermal Shutdown
Internal 1.3A Current Limit
Available in 2mm x 3mm QFN8 Package

Typical Application Circuit

Applications

LCD Panels
Digital Picture Frames
Handheld Computers and PDAs
Digital Still Cameras

Design Notes

Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
Size the inductor and output capacitor for the string current ripple, not the total LED current.