MPQ3365-AEC1

MPQ3365-AEC1

4-Channel, Max. 150mA/Ch, Boost WLED Driver with 15000:1 Dimming Ratio and I²C, AEC-Q100 Qualified

Description

The MPQ3365-AEC1 is a step-up converter with four channel current sources, designed to drive the white LED arrays as backlighting in small to mid-size LCD panels.

The MPQ3365-AEC1 uses peak current mode as its pulse-width modulation (PWM) control architecture to regulate the boost converter. Four channel current sources are applied into the LED cathode to adjust the LED brightness. The MPQ3365-AEC1 regulates the current in each LED string to the value set via an external current-setting resistor, with 2.5% current regulation accuracy between strings.

The MPQ3365-AEC1 is designed for higher efficiency with a low on resistance (R_DS(ON)) MOSFET and a low headroom voltage. It provides a standard I²C digital interface for ease of use. The switching frequency (f_SW) can be configured via a resistor, I²C interface, or external clock.

The MPQ3365-AEC1 provides analog, PWM, and mixed dimming mode with a PWM input or internal register. Dimming mode can be selected via the I²C interface or the MIX/AD pin. The device also provides a phase shift function to eliminate noise during PWM dimming.

Robust protections are included to guarantee the device’s safe operation. Protection modes include over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), LED short/open protection, and LEDx short-to-GND protection. The NTC function provides an option that decreases the LED current automatically at higher temperatures.

The MPQ3365-AEC1 is available in a QFN-24 (4mmx4mm) package and is AEC-Q100 qualified.

Features & Benefits

3.6V to 36V Input Voltage (V_IN) Range
4 Channels with Max. 150mA per Channel
Internal 110mΩ, 50V MOSFET
Configurable Switching Frequency (f_SW) Up to 2.2MHz
External Sync SW Function
Multi-Dimming Operation via the Pulse-Width Modulation (PWM) Input or Register, Including:
- PWM Dimming
- Analog Dimming
- Mixed Dimming with 50%, 25%, 12.5%, or 6.25% Transfer Point
15000:1 Dimming Ratio during Mixed Dimming at f_PWM ≤ 200Hz
200:1 Dimming Ratio during Analog Dimming
Excellent EMI Performance and Frequency Spread Spectrum (FSS)
I²C Interface with 3 Selectable IC Addresses
Phase Shift Function for PWM Dimming
2.5% Current Matching
Cycle-by-Cycle Current Limit
Disconnect VOUT from VIN
Optional LED Current Automatically Decrements at High Temperature (NTC)
LED Short/Open Protection, Over-Temperature Protection (OTP), Over-Current Protection (OCP), and Inductor/Diode Short Protection
Configurable LED Short Threshold
Configurable Over-Voltage Protection (OVP) Threshold
Fault Indicator Signal Output
Available in a QFN-24 (4mmx4mm) Package
AEC-Q100 Qualified