Monolithic Power Systems Inc. MPQ3369GR-AEC1-P

Overview

MPQ3369GR-AEC1 from Monolithic Power Systems is a 6-channel, AEC-Q100 qualified boost white LED driver with I²C interface, peak-current-mode PWM control, 100mA/channel max output, 15000:1 PWM dimming ratio at ≤200Hz, and integrated 100mΩ/50V MOSFET - designed for automotive LCD backlighting requiring high current matching (±2.5%) and phase-shifted PWM dimming to suppress audible noise.

For engineers reviewing the MPQ3369GR-AEC1 datasheet, MPQ3369GR-AEC1 pinout, MPQ3369GR-AEC1 application in automotive displays or tablet backlighting, or MPQ3369GR-AEC1 equivalent for AEC-Q100-compliant WLED drivers, this page delivers verified electrical specs, QFN-24 pin mapping, multi-dimming mode selection logic, fault protection thresholds, and real-world thermal derating behavior.

Technical Context

The MPQ3369GR-AEC1 implements peak-current-mode control with programmable switching frequency (495kHz–2.2MHz), internal 5V LDO (VCC) for gate drive and logic, and six independent cathode-connected current sinks with 350–1000mV headroom voltage across 20–100mA load range. Its analog/PWM/mix dimming architecture supports simultaneous 200:1 analog and 15000:1 PWM dim ratios via dedicated DIM, MIX/AD, and I²C register control.

Robust protection includes programmable OVP (1.9–2.1V threshold), LED short/open detection with STH pin biasing (18μA current source), cycle-by-cycle current limiting (2.3–2.6A), thermal shutdown at 170°C with 20°C hysteresis, and fault flag (FF) open-drain output. Phase shift (60° for 6 channels, 90° for 4) is enabled via SCL/PSE–SDA/PSE tie-off or PSE bit setting.

Key Specifications

Pinout & Package

MPQ3369GR-AEC1 is housed in a thermally enhanced QFN-24 (4mm × 4mm) package with exposed AGND pad. The 24-pin layout supports compact automotive PCB layouts while enabling efficient heat dissipation through the bottom thermal pad soldered to AGND plane.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-channel automotive WLED driver applications.

Compared with MAX20444ATL+T and TPS61196RHBR, MPQ3369GR-AEC1 uniquely combines 6-channel AEC-Q100 Grade 1 operation, I²C configurability, phase-shift PWM, and 15000:1 dimming - making it the only option for high-reliability, noise-immune automotive backlighting demanding full thermal and EMI compliance.

Availability

MPQ3369GR-AEC1 is available at Aetrix Electronics and suitable for automotive instrument clusters, center infotainment displays, head-up display modules, and passenger seat entertainment tablets requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for MPQ3369GR-AEC1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MPQ3369-AEC1 belongs to MPS's automotive-grade LED driver product line, engineered specifically for high-reliability LCD backlighting in vehicles - emphasizing thermal robustness, EMI resilience, and seamless integration with vehicle lighting control networks.

FAQ

What is the minimum PWM dimming frequency supported for 15000:1 dim ratio?

The 15000:1 PWM dimming ratio is guaranteed only at input frequencies ≤200Hz, as specified in the Electrical Characteristics table. At higher frequencies (e.g., 20kHz), the achievable dim ratio drops to 200:1 due to timing resolution limits in the internal counter and minimum on-time constraints of the current sinks.

How does the phase-shift function reduce audible noise in automotive applications?

By staggering the turn-on timing of LED current sinks (60° for 6 channels), the MPQ3369GR-AEC1 distributes inrush current peaks across the PWM period, lowering peak di/dt and eliminating mechanical vibration in inductors and capacitors that cause audible coil whine - critical for quiet cabin environments.

Can unused LED channels be disabled without hardware modification?

Yes - the CH2:0 register bits (accessible via I²C) allow software disabling of channels 2–6. For example, setting CH2:0 = 001 configures only LED1–LED5 active, while connecting unused LEDx pins to GND provides automatic hardware detection during startup for fail-safe operation.

What is the role of the SD pin during overvoltage fault conditions?

The SD pin drives the gate of an external high-side PMOS transistor to disconnect VIN from the boost stage when OVP, OTP, or LED short faults occur. This prevents uncontrolled power delivery and enables safe system-level fault containment - essential for ASIL-B compliant designs.

Is the 2.5% current matching specification valid across the full temperature range?

Yes - the ±2.5% inter-channel current matching is characterized from −40°C to +125°C junction temperature, as confirmed in the Electrical Characteristics table under "Current matching" with test condition TJ = −40°C to +125°C. This ensures consistent luminance in extreme automotive thermal environments.

How is the OVP threshold programmed, and what tolerance applies?

The OVP threshold is set using a resistor divider from VOUT to the OVP pin, with nominal threshold of 2.0V and ±5% tolerance (1.9V–2.1V). The internal comparator compares divided VOUT against this reference, triggering shutdown if exceeded - protecting LEDs and downstream circuitry during open-string faults.

Does the device support synchronization of multiple MPQ3369GR-AEC1 units?

Yes - the FREQ/SYNC pin accepts an external clock signal to synchronize switching frequencies across multiple devices, reducing beat-frequency EMI and enabling coordinated phase-shift timing for large-area backlight systems with stacked display layers.