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6-Channel, Max.150mA/Ch Boost WLED Driver with 15000:1 Dim Ratio and I2C
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The MP3367 is a step-up converter with six channel current sources, designed to drive white LED arrays as backlighting in small-to-mid-size LCD panels.
The MP3367 uses peak current mode as its PWM control architecture to regulate the boost converter. Six channel current sources are applied into the LED cathode to adjust the LED brightness. The MP3367 regulates the current in each LED string to the value set by an external current-setting resistor, with 2.5% current regulation accuracy between strings.
The MP3367 employs a low on-resistor MOSFET and a low headroom voltage, designed for higher efficiency. It has a standard I2C digital interface for ease of use. The switching frequency can be programmed by a resistor, I2C interface, or external clock.
The MP3367 provides analog, PWM, and mix dimming mode with a PWM input. Dimming mode can be selected with the I2C interface or the MIX/AD pin. It also has a phase shift function to eliminate noise during PWM dimming.
Robust protections are included to guarantee safe operation of the device. Protection modes include over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), LED short, and open protection. There is also an option that automatically decreases the LED current at higher temperatures.
The MP3367 is available in QFN-24 4mmx4mm and TSSOP28-EP packages.
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Features & Benefits
- 3.5V to 36V Input Voltage Range
- Six Channels with Max 150mA per Channel
- Internal 100mΩ, 50V MOSFET
- Programmable Up to 2.2MHz fSW
- External Sync SW Function
- Multi-Dimming Operation Mode through PWM Input, Including:
- Direct PWM Dimming
- Analog Dimming
- Mix Dimming with 25%/12.5% Transfer Point
- 15000:1 Dim Ratio in PWM Dim at fPWM ≤ 200Hz
- 200:1 Dim Ratio at Analog Dim through PWM Dim Signal Input
- Excellent EMI Performance, Frequency Spread Spectrum
- I2C Interface
- Phase Shift Function for PWM Dimming
- 2.5% Current Matching
- Cycle-by-Cycle Current Limit
- Disconnect VOUT from VIN
- Optional LED Current Auto-Decrement at High Temperatures
- LED Short/Open, OTP, OCP, and Inductor Short Protections
- Programmable LED Short Threshold
- Programmable OVP Threshold
- Fault Indicator Signal Output
- Available in QFN-24 4mmx4mm and TSSOP28-EP Packages
EVQ3367-R-00A Evaluation Kit 6 Channels, Max.150mA/Ch Boost WLED Driver With 15000:1 Dim Ratio And I2C
The MPQ3367 is a step-up converter with 6-channel current sources. It is designed for driving the white LED arrays as backlighting of middle or small size LCD panel.
The MPQ3367 uses peak-current mode as its PWM control architecture to regulate the boost converter. 6 channel current sources are applied into the LED cathode to adjust the LED brightness. It regulates the current in each LED string to the value set by an external current-setting resistor, with 2.5% current regulation accuracy between strings.
MPQ3367 employs a low on-resistor MOSFET and a low headroom voltage design to get the higher efficiency. It has standard I2C digital interface for easy use. The switching frequency can be programmed by a resistor, I2C interface or external clock.
MPQ3367 provides analog/PWM/mix dimming mode with PWM input. Dimming mode can be selected by I2C interface or MIX/AD pin. It also has the phase shift function to eliminate the noise when PWM dimming.
Rich protections are designed to guarantee safety operation. The protection modes include OCP (over-current protection), OVP (over-voltage protection), OTP (over-temperature protection), LED short and open protection. Besides, the LED current decreases automatically at higher temperature.
The MPQ3367 is available in QFN24-4mmX4mm and TSSOP28-EP package.