MP3320N 1.8-5.5V, 3CH Charge Pump RGB LED Driver QFN-14

MP3320N 1.8-5.5V, 3CH Charge Pump RGB LED Driver QFN-14

The MP3320N is a 3-channel RGB LED driver, with a wide 1.8V to 5.5V input voltage (VIN) range.

Key Specifications

Features

• 1.8V to 5.5V Input Voltage (VIN) Range
• 5.5V Max Output Voltage (VOUT)
• 3 Channels, Max 100mA/Channel
• Internal, Self-Adaptive Charge Pump
• 1x, 1.5x, or 2x Charge Pump Auto-Transfer Rate
• 8-Bit Customized Default LED Current Amplitude for Each Channel
• Separated Pulse-Width Modulation (PWM) Dimming for Each Channel
• High Efficiency
• LED Open Protection
• LED Short Protection

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.

Common Questions