Monolithic Power Systems Inc. EVQ3367A-R-00A

Overview

EVQ3367A-R-00A from Monolithic Power Systems is an AEC-Q100 Grade 1 qualified evaluation board for the MPQ3367A six-channel boost WLED driver IC, supporting up to 150mA per channel, 15000:1 PWM dimming ratio, and I²C programmable control. It demonstrates backlight driving for automotive displays and tablets using a QFN-24 (4mm×4mm) LED driver with peak-current-mode PWM control, 2.5% inter-string current matching, and integrated OVP/OCP/OTP protection.

For engineers reviewing the EVQ3367A-R-00A datasheet, EVQ3367A-R-00A pinout, EVQ3367A-R-00A application, or EVQ3367A-R-00A equivalent, this board enables rapid validation of MPQ3367A's 3.5–36V input operation, 2.2MHz configurable switching frequency, phase-shifted PWM dimming, analog/mixed dimming modes, and fault reporting via dedicated signal output.

Technical Context

The EVQ3367A-R-00A implements a complete reference design for the MPQ3367A IC, which integrates a 100mΩ/50V internal MOSFET, six independent cathode-side current sinks, and I²C-configurable protection thresholds. Its schematic includes external sync capability, selectable I²C addresses (0x38/0x39/0x3A), and jumper-controlled dimming mode selection (PWM/ANA/MIX).

Board-level features include VIN-to-GND input range verification (3.5–36V), LED string voltage monitoring up to 50V, EN-controlled enable/disable sequencing, and dedicated test points for COMP, SW, OVP, and STH signals-enabling real-time waveform capture and fault injection testing under automotive thermal and EMI constraints.

Key Specifications

Availability

EVQ3367A-R-00A is available at Aetrix Electronics and suitable for automotive display backlight development, tablet LCD power validation, and industrial HMI lighting system prototyping requiring stable component supply and AEC-Q100-compliant reference hardware.

Supply support for EVQ3367A-R-00A 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 core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and consumer applications.

The MPQ3367A product line targets high-reliability backlighting in automotive displays and portable computing, delivering precise multi-string current regulation, ultra-high dimming ratios, and robust fault protection in compact QFN packages.

FAQ

What is the primary function of the EVQ3367A-R-00A evaluation board?

This board is a fully assembled and tested platform for evaluating the MPQ3367A six-channel WLED driver IC. It provides immediate access to all control interfaces (I²C, EN, PWM, SYNC), LED string outputs (LED1–LED6), and fault monitoring pins (SD, OVP, STH), enabling functional validation without custom PCB design.

Does the EVQ3367A-R-00A support AEC-Q100 compliance testing?

Yes-the board hosts the MPQ3367AGRE, which is qualified to AEC-Q100 Grade 1 (−40°C to +125°C ambient). The layout follows automotive thermal and EMI guidelines, and all critical components (inductor L1, MOSFET M1, capacitors C2/C3/C5/C15) are automotive-grade parts rated for extended temperature operation.

How do I configure dimming mode on this evaluation board?

Dimming mode is selected via JP4: open = PWM dimming, closed position 1 = analog dimming, closed position 2 = mixed dimming. Alternatively, use the I²C interface to write to register 0x01 (DIM_MODE bits) while the board is connected to an EVKT-USBI2C-02 kit and controlled via MPS GUI software.

Can I synchronize the MPQ3367A's switching frequency to an external clock?

Yes-the board exposes the SYNC pin (Jumper JP3 pin 3) for external clock injection. When enabled, the MPQ3367A locks its internal oscillator to the external signal, allowing EMI reduction through frequency alignment across multiple boards or with system clocks in automotive infotainment modules.

What protection features can be tested using this board?

All built-in protections are accessible: over-voltage (OVP pin), over-current (via STH pin monitoring), over-temperature (OTP triggers automatic LED current reduction), LED short/open detection (reported via SD pin), and inductor short protection. Test points and jumpers allow intentional fault injection for validation.

Is the GUI software required to operate the board?

No-basic operation only requires VIN, EN high, and a PWM signal on the DIM terminal. However, the MPS GUI (downloadable from monolithicpower.com) is required to access advanced features: I²C register read/write, dimming mode selection, OVP threshold programming, phase shift adjustment, and fault log interrogation via the SD pin status.