EVQ3359-LE-00A

EVQ3359-LE-00A is a 4-channel, max 150mA/channel, boost WLED driver with a high dimming ratio evaluation board. evaluation board is designed to demonstrate the capabilities of the MPQ3359-AEC1, a converter that drives white LED (WLED) arrays as backlighting for small- or medium-sized LCD panels. Peak current mode is used as the PWM control architecture to regulate the boost converter. 4 channel current sources are applied to the LED cathode to adjust LED brightness. This regulates the current in each LED string to the value set by an external current-setting resistor, with a 2.5% current regulation accuracy between strings. The MPQ3359-AEC1’s low on resistance (RDS(ON)) MOSFET and headroom voltage improve efficiency. The switching frequency (fSW) can be configured via a resistor or an external clock. The MPQ3359-AEC1 provides analogue and PWM dimming via the EN/ADIM and PDIM pins. The device also has a fixed delay time between LED current channels to eliminate noise during PWM dimming.

• Input voltage (VIN) range from 3.5V to 40V
• Four channels with a maximum of 150mA per channel
• Internal 100mohm, 50V MOSFET
• Configurable switching frequency (fSW) up to 2.2MHz
• External Sync SW function, Pulse-Width Modulation (PWM) dimming, analogue dimming
• Deep dimming ratio, 2.5% current matching, cycle-by-cycle current limiting
• Excellent EMI performance and Frequency Spread Spectrum (FSS), disconnect VOUT from VIN
• LED short/open protection, OTP, OCP and inductor/diode short protection
• Fault indicator signal output, available in AEC-Q100 Grade 1
• Fixed 100μs delay time between LED current channels during PWM dimming (replace phase shift)

Notes

MPS part numbers ending in "-P" and "-Z" are the same parts. P & Z only indicates reel size.