Monolithic Power Systems Inc. EVQ7220-R-00A

Overview

EVQ7220-R-00A from Monolithic Power Systems is a fully assembled and tested evaluation board for the MPQ7220GR-AEC1 6-channel automotive LED driver IC. It demonstrates boost LED driving with independent 100mA per channel current regulation, 3.5V–36V input range, 450kHz switching frequency, and AEC-Q100 Grade 1 qualification-targeting automotive tail light systems.

For engineers reviewing the EVQ7220-R-00A datasheet, EVQ7220-R-00A pinout, EVQ7220-R-00A application, or EVQ7220-R-00A equivalent, this board enables rapid validation of LED string current matching (±2.5%), PWM dimming (100Hz–20kHz), spread-spectrum EMI reduction, and fault diagnostics including LED open/short, OVP, OTP, and cycle-by-cycle current limiting.

Technical Context

The EVQ7220-R-00A implements peak current mode control using the MPQ7220GR-AEC1's internal 100mΩ/50V MOSFET and integrated six-channel current sinks. It supports external resistor programming of switching frequency up to 2.2MHz and synchronization via the FREQ/SYNC pin.

Board-level features include configurable over-voltage protection (OVP) via voltage divider (R11/R12), programmable LED current setting via ISET resistor (e.g., 12.4kΩ → 100mA), and dedicated fault indicator signaling through the FF pin for real-time system monitoring.

Key Specifications

Availability

EVQ7220-R-00A is available at Aetrix Electronics and suitable for automotive lighting development, LED driver qualification, and EMI compliance testing requiring stable component supply and production-ready reference design validation.

Supply support for EVQ7220-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 solutions, with a focus on efficiency, integration, and automotive-grade reliability.

The EVQ7220-R-00A belongs to MPS's automotive LED driver evaluation platform family, designed specifically to accelerate development of AEC-Q100-compliant exterior lighting systems with robust fault handling and low-EMI operation.

FAQ

What input voltage range does the EVQ7220-R-00A support?

The board accepts 3.5V to 36V DC input, covering nominal 12V and 24V automotive systems, including cold-crank (down to ~6V) and load-dump transients (up to 36V). Input filtering uses multiple ceramic and electrolytic capacitors (CIN1–CIN7) to maintain stability under dynamic conditions.

How is LED current set and matched across channels?

LED current per channel is set by a single external ISET resistor (e.g., 12.4kΩ yields 100mA); the MPQ7220GR-AEC1 achieves ±2.5% current matching between all six strings via precision internal current mirrors and thermal compensation circuitry.

Does the board support synchronization with an external clock?

Yes-the FREQ/SYNC pin accepts either a resistor (for fixed-frequency operation) or an external clock signal (200kHz–2.2MHz), enabling synchronization to system timing sources to reduce beat frequencies and improve EMI performance in multi-board systems.

What protections are implemented and how are faults signaled?

The board demonstrates full MPQ7220GR-AEC1 protection suite: LED open/short, inductor short, over-temperature (OTP), over-current (OCP), and over-voltage (OVP). Faults are signaled via the FF (Fault Flag) pin, which pulls low during active fault conditions and supports system-level diagnostic logging.

Can the OVP threshold be adjusted, and how?

Yes-OVP is set by a resistor divider (R11 = 191kΩ, R12 = 10kΩ) on the OVP pin. Equation VOVP = 2V × (R11 + R12)/R12 yields ~38.2V; the threshold can be scaled linearly by adjusting R11 or R12 to match specific LED string voltage requirements.

Is the board pre-configured for automotive tail light use cases?

Yes-it ships configured for 6-string tail light operation with 100mA per string, 450kHz switching, and CISPR25 Class 5 EMI compliance. The schematic, layout, and BOM follow automotive design best practices including thermal relief, fault isolation, and robust input filtering.