MPQ3366C-AEC1

MPQ3366C-AEC1

6-Channel, Max 200mA/Channel, Boost WLED Controller with 10000:1 Dimming Ratio and I²C, AEC-Q100 Qualified

概要

The MPQ3366C-AEC1 is a step-up controller with 6 channel current sources. The device is designed to drive white LED (WLED) arrays as backlighting for small- and medium-sized LCD panels.

The MPQ3366C-AEC1 uses peak current mode as its pulse-width modulation (PWM) control architecture to regulate the boost converter within the controller. Six channel current sources are applied to the LED cathode to adjust LED brightness. The device 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 MPQ3366C-AEC1 employs a strong gate driver signal for an external MOSFET, with selectable rising and falling times. It has a standard I²C digital interface for ease of use. The switching frequency (f_SW) can be configured via a resistor, the I²C interface, or an external clock. A low headroom voltage is provided to improve efficiency and IC thermal performance.

The MPQ3366C-AEC1 provides analog, PWM, and mixed dimming modes through a PWM input or internal registers. The dimming mode can be selected via the I²C interface. It also has a phase-shift function to reduce inrush current and eliminate audible noise during PWM dimming.

Rich protection features are designed to guarantee safe device operation. Protection modes include over-current protection (OCP), over-voltage protection (OVP), over-temperature protection (OTP), VOUT short-to-GND protection, LEDx short-to-GND protection, and LED short and open protection. The MPQ3366C-AEC1 can automatically decrease the LED current (I_LEDx) via detection on the NTC pin.

The MPQ3366C-AEC1 is available in a QFN-24 (4mmx4mm) package, and is available in AEC-Q100 Grade 1.

機能と利点

3.8V to 36V Input Voltage (V_IN) Range
6 Channels with Max 200mA per Channel
Configurable Switching Frequency (f_SW) Up to 2.2MHz
External SW Synchronization Function
Multi-Dimming Operation via Pulse-Width Modulation (PWM) Input or Internal Register, Including:
- Direct and Internal PWM Dimming (15 Bits)
- Analog Dimming (10 Bits)
- Mixed Dimming with 25%/12.5% Transfer Point
≥10000:1 Dimming Ratio in Direct PWM Dimming at PWM Frequency (f_PWM) ≤ 200Hz
Excellent EMI Performance with Frequency Spread Spectrum (FSS)
I²C Interface with 4 Configurable IC Addresses
Phase-Shift Function for PWM Dimming
2.5% Current Matching
Cycle-by-Cycle Current Limiting
Disconnect Output Voltage (V_OUT) from V_IN
Negative Temperature Coefficient (NTC) Function to Reflect the External Temperature
LED Short/Open Protection, Over-Current Protection (OCP), Over-Voltage Protection (OVP), Over-Temperature Protection (OTP), Inductor/Diode Short Protection, VOUT Short-to-GND Protection, and LEDx Short-to-GND Protection
Configurable OVP and LED Short Protection Thresholds
Fault Indicator Signal Output
Available in a QFN-24 (4mmx4mm) Package
Available in AEC-Q100 Grade 1