Monolithic Power Systems Inc. EVQ7200-L-00B

Overview

EVQ7200-L-00B from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ7200-AEC1 synchronous buck-boost LED driver IC, supporting 6V–20V input and delivering up to 1.2A constant LED current in automotive-grade buck-boost topology with 1.15MHz switching frequency, spread-spectrum EMI reduction, and dual dimming modes (PWM and programmable two-step).

For engineers reviewing the EVQ7200-L-00B datasheet, EVQ7200-L-00B pinout, EVQ7200-L-00B application, or EVQ7200-L-00B equivalent, this board enables rapid validation of AEC-Q100 Grade 1 LED driver performance-including fault diagnostics (LED open/short, over-voltage, thermal shutdown), NTC-based thermal derating, and CISPR25 Class 5 EMI compliance-under real-world automotive lighting conditions.

Technical Context

The EVQ7200-L-00B implements the MPQ7200-AEC1's constant-frequency hysteretic control architecture, eliminating loop compensation while enabling sub-microsecond transient response across 6V–20V input and 3V–15V LED output ranges. It integrates 44mΩ/40mΩ internal MOSFETs and supports configurable 1.2A continuous output via external ISET resistor (e.g., 13.3kΩ for 1.2A).

Board-level features include dedicated EN/DIM pin for enable control and dimming mode selection, FAULT pin reporting LED short/open, over-voltage, and thermal events, and NTC interface for remote temperature sensing and programmable thermal derating-enabling robust operation in automotive ambient temperatures up to 125°C junction.

Key Specifications

Availability

EVQ7200-L-00B is available at Aetrix Electronics and suitable for automotive LED headlamp development, adaptive front-lighting systems (AFS), and interior ambient lighting requiring stable component supply, pre-validated EMI performance, and AEC-Q100-compliant reference design traceability.

Supply support for EVQ7200-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 ICs, with core expertise in DC/DC converters, LED drivers, and motor drivers for automotive, industrial, and consumer applications.

The EVQ7200-L-00B belongs to MPS's automotive evaluation board product line, designed specifically to accelerate qualification of AEC-Q100 Grade 1 LED drivers in safety-critical lighting systems-emphasizing fault resilience, thermal robustness, and regulatory EMI compliance.

FAQ

What input voltage range is supported, and what happens if VIN exceeds 20V?

The EVQ7200-L-00B is rated for 6V–20V input per its design intent for the MPQ7200-AEC1's buck-boost operation. Exceeding 20V violates the board's validated operating envelope; however, the underlying IC supports up to 42V. To operate above 20V, external input filtering (e.g., damping capacitor CIN7) and revised input EMI components per MPS AN-129 are required-board-level validation beyond 20V is not provided.

How is LED current accuracy maintained across temperature and input voltage variations?

LED current is set by the precision ISET resistor (R5) and regulated by the MPQ7200-AEC1's internal current-sense amplifier and hysteretic control loop. Load regulation is ±1.5% over 6V–20V input, and line regulation is ±0.5% over temperature (−40°C to +125°C), as confirmed by test data on page 6 of the reference document using 13.3kΩ R5 at 1.2A.

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

No-the EVQ7200-L-00B is configured exclusively for buck-boost mode per its schematic (dual inductor L1/L2, shared SW node, fixed feedback network). The MPQ7200-AEC1 IC supports all three topologies, but this evaluation board's layout, component selection (e.g., 4.7µH inductors, 12V LED output range), and test reports are strictly for buck-boost operation with V_IN + V_LED < 40V.

What fault conditions trigger the FAULT pin, and how is recovery handled?

The FAULT pin asserts low for LED open circuit, LED short-to-GND or short-to-battery, output over-voltage (>16.5V), and thermal shutdown (>150°C junction). Recovery is automatic after fault removal and a 2ms debounce delay; no manual reset is required. Fault status is latched only during active fault and clears immediately upon condition resolution.

Is the board RoHS and AEC-Q100 compliant, and where is compliance documented?

Yes-the EVQ7200-L-00B uses only RoHS-compliant, halogen-free components (per MPS green status documentation), and its core IC (MPQ7200GL-AEC1) is certified AEC-Q100 Grade 1 (−40°C to +125°C ambient). Compliance evidence is in the MPS product brief (MPQ7200-AEC1 Datasheet Rev. 1.02) and the board's bill of materials, which lists only qualified automotive-grade passives and connectors.

How is EMI performance achieved without external shielding or ferrites?

EMI suppression relies on four integrated techniques: (1) 1.15MHz spread-spectrum switching, (2) optimized PCB stack-up with solid ground planes (Figures 2–5), (3) damped input LC filter (CIN7 + R7), and (4) controlled slew-rate gate drive. Test results on pages 7–8 confirm full CISPR25 Class 5 compliance across conducted/radiated bands up to 1GHz without add-on filters or shields.