MP3320A 1.8-5.5V, 4CH Charge Pump RGB LED Driver QFN-14

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MP3320A 1.8-5.5V, 4CH Charge Pump RGB LED Driver QFN-14

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pMPS MP3320A — Charge Pump RGB LED Driver, 1.8-5.5V input, 4 channels, QFN-14./p

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MPS QFN-14 LED Drivers LED Power Management

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MP3320A 1.8-5.5V, 4CH Charge Pump RGB LED Driver QFN-14

The MPS MP3320A is a Charge Pump RGB LED Driver. It operates from a 1.8 V to 5.5 V input and drives 4 LED strings. It is supplied in a QFN-14 package.

The MP3320A is a 4-channel, self-adaptive, charge pump RGB LED driver that operates across a wide 1.8V to 5.5V input voltage (VIN) range.

Key Specifications

Part Number	MP3320A
Function	Charge Pump RGB LED Driver
Input Voltage	1.8 V to 5.5 V
Channels	4
Interface	I²C
Package	QFN-14
Ordering Codes	MP3320A

Features

1.8V to 5.5V Input Voltage (VIN) Range
5.5V Max Output Voltage (VOUT)
4 Channels, Max 51mA/Ch
Enable/Disable for Each Channel
Internal, Self-Adaptive Charge Pump
Charge Pump Auto-Transfer Rate: 1x, 1.5x, and 2x
8-Bit Analog Dimming for Each Channel
10-Bit Pulse-Width Modulation (PWM) Dimming for Each Channel
Configurable PWM Dimming Frequency (fPWM)
400kHz I2C-Compatible Interface

Typical Application Circuit

Applications

Wearable Devices
LED Indicators

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.