EVQ3367A-R-00A

EVQ3367A-R-00A is an evaluation board designed to demonstrate the capabilities of the MPQ3367A, a step-up converter with six channel current sources. It is designed to drive white LED arrays as backlighting for small- and medium sized LCD panels. The device uses peak current mode as its PWM control architecture to regulate the boost converter. Six channel current sources are applied to the LED cathode to adjust LED brightness. The MPQ3367A regulates the current in each LED string to value set by an external current-setting resistor, with 2.5% current matching between strings. A low on resistance MOSFET and headroom voltage are provided to improve efficiency. MPQ3367A has a standard I2C digital interface for easy use. The switching frequency can be configured via a resistor, I2C interface or external clock. The MPQ3367A provides analogue, PWM and mix dimming mode with a PWM input. The MPQ3367A is available in a QFN-24 (4mmx4mm) package.

• 12V input voltage, <lt/>50V output voltage, 6 strings LEDs, 50mA LED current/string
• Internal 100mohm/50V MOSFET, external sync switching frequency function
• 15000:1 dimming ratio in PWM dimming mode when fPWM ≤ 200Hz, configurable fSW up to 2.2MHz
• 200:1 dimming ratio at analogue dimming through PWM dimming signal input
• Excellent EMI performance, frequency spread spectrum
• Phase shift function for PWM dimming, 2.5% current matching, cycle-by-cycle current limit
• Disconnect VOUT from VIN. optional LED current auto-decrease at high temperatures
• LED short/open, OTP, OCP, inductor short protection, configurable LED short threshold
• Fault indicator signal output, AEC-Q100 Grade 1 qualified, configurable OVP threshold
• Suitable for use in tablets, notebooks and automotive displays

Notes

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