Monolithic Power Systems Inc. EVQ7200A-L-00B

Overview

EVQ7200A-L-00B from Monolithic Power Systems is a fully assembled, AEC-Q100 Grade 1 qualified evaluation board for the MPQ7200A synchronous buck-boost LED driver IC. It delivers up to 1.2A constant LED current across a 6V–20V input range, operates at 410kHz switching frequency in buck-boost mode, and supports PWM and two-step dimming for automotive interior lighting validation.

For engineers reviewing the EVQ7200A-L-00B datasheet, EVQ7200A-L-00B pinout, EVQ7200A-L-00B application, or EVQ7200A-L-00B equivalent, this board enables rapid functional verification of high-efficiency, EMI-compliant LED driver designs targeting CISPR25 Class 5 automotive emissions requirements.

Technical Context

The EVQ7200A-L-00B implements the MPQ7200A's constant-frequency hysteretic control architecture, enabling fast transient response without external loop compensation. Its layout integrates input EMI filtering (CIN7 damping LC oscillation), dual-stage output capacitance (C2A/C2B + C3A/C3B), and precision current-setting via R5 on the ISET pin.

Board-level features include dedicated EN/DIM functionality supporting both analog-dimming enable control and 100Hz–2kHz PWM dimming, plus fault monitoring via the FAULT pin with open-LED, short-circuit, and ISET/IDUTY fault detection validated per test reports.

Key Specifications

Availability

EVQ7200A-L-00B is available at Aetrix Electronics and suitable for automotive lighting development, LED driver reference design validation, and CISPR25 pre-compliance testing requiring stable component supply and traceable sourcing.

Supply support for EVQ7200A-L-00B 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 solutions for automotive, industrial, and consumer applications, with core expertise in DC/DC conversion and LED driver ICs.

The EVQ7200A-L-00B belongs to MPS's AEC-Q100-qualified LED driver evaluation platform family, designed specifically to accelerate qualification of buck-boost LED drivers in safety-critical automotive interior and exterior lighting systems.

FAQ

What input voltage range does the EVQ7200A-L-00B support?

The board operates from 6V to 20V input, covering nominal 12V automotive systems, cold-crank dips down to ~6V, and transient overvoltages up to 20V. Input voltage plus LED string voltage must remain below 40V to ensure safe operation of the MPQ7200A IC.

How is LED current set on this evaluation board?

LED current is set by resistor R5 connected to the ISET pin of the MPQ7200A. For 1.2A output, R5 = 13.3kΩ is installed; values for lower currents (e.g., 0.7A → 22.6kΩ, 0.5A → 31.5kΩ) are documented in the quick-start guide and validated in buck-boost mode.

Does the board support PWM dimming, and what frequency range is validated?

Yes - the EN/DIM pin accepts external 100Hz to 2kHz PWM signals for smooth LED brightness control. Test waveforms in the documentation confirm clean start-up, shutdown, and steady-state behavior across this full range with no audible noise or current overshoot.

What fault protection features are implemented and tested?

The board validates open-LED, LED+–LED− short, ISET/IDUTY pin shorts/opens, and FAULT pin shorts - all triggering immediate shutdown and FAULT pin assertion. These responses are captured in oscilloscope waveforms across start-up, dimming, and fault injection test cases.

Is the board compliant with automotive EMI standards?

Yes - it meets CISPR25 Class 5 limits for both conducted (150kHz–108MHz) and radiated emissions (150kHz–1GHz) in horizontal/vertical polarizations, as verified in the test report. Layout optimizations include damped input LC filter (CIN7 + L1) and symmetric power-ground routing.

Can the board be used for buck-only or boost-only configurations?

No - the EVQ7200A-L-00B is configured exclusively for buck-boost mode per its schematic and bill of materials. The inductor (L2 = 10µH), output capacitor selection (C2A/C2B), and feedback network are optimized for buck-boost operation with 4-LED strings (VLED ≈ 12V).