Monolithic Power Systems Inc. EV1924A-R-00A

Overview

EV1924A-R-00A from Monolithic Power Systems is an evaluation board for the MP1924A high-frequency half-bridge gate driver IC, configured as a buck converter with independent high-side/low-side control, 100V input capability, and <5ns channel matching. It supports VDD 8–15V, VIN up to 100V, and features on-chip bootstrap diode and TTL-compatible inputs.

For engineers reviewing the EV1924A-R-00A datasheet, EV1924A-R-00A pinout, EV1924A-R-00A application, or EV1924A-R-00A equivalent, this board enables rapid validation of MP1924A-based half-bridge designs in telecom power supplies, avionics DC/DC converters, and motor drivers requiring precise dead-time control and <20ns propagation delay.

Technical Context

The EV1924A-R-00A implements a functional buck topology using the MP1924A QFN-10 gate driver, with separate INH/INL inputs enabling externally generated complementary PWMs. Its layout includes dedicated test points (1mm needles) for VDD, GND, INL, INH, DRVH, DRVL, SW, and load connections.

Board-level design incorporates a 33µH power inductor (Wurth 74435573300), dual AM4490N MOSFETs in PowerPAK SO-8, and multi-layer ceramic capacitors (22µF X5R 1210, 220nF X7R 1210) for bootstrap and output filtering - all optimized for high-frequency switching up to several MHz.

Key Specifications

Availability

EV1924A-R-00A is available at Aetrix Electronics and suitable for telecom half-bridge power supplies, avionics DC/DC converters, and industrial motor driver development requiring stable component supply, fast prototyping turnaround, and validated gate driver reference design.

Supply support for EV1924A-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, including DC/DC converters, gate drivers, LED drivers, and motor controllers.

The MP1924A product line targets high-frequency, high-efficiency half-bridge applications where tight propagation matching (<5ns), low quiescent current (<150µA), and integrated bootstrap diodes reduce external component count in space-constrained power systems.

FAQ

What is the primary purpose of the EV1924A-R-00A evaluation board?

The EV1924A-R-00A is a fully assembled, tested reference design for evaluating the MP1924A half-bridge gate driver IC. It provides immediate access to critical signals (INH, INL, DRVH, DRVL, SW) and supports bench validation of timing behavior, bootstrap operation, and thermal performance under real 100V-input conditions.

Does the board include the MP1924A IC, and what package is used?

Yes, the board integrates one MP1924AHR IC in QFN-10 (4mm × 4mm) package, as confirmed by the Bill of Materials and schematic. This matches the manufacturer's recommended footprint and thermal pad layout for optimal high-frequency gate drive performance.

Can the EV1924A-R-00A be used with external PWM controllers?

Yes - the board requires externally generated complementary PWM signals applied to CN4 (INH and INL), with user-implemented dead time. The design intentionally omits internal PWM generation to enable flexible integration with custom controllers, FPGAs, or microcontrollers driving high-side/low-side independently.

What are the key power stage components on the board?

The board uses two AM4490N N-channel MOSFETs in PowerPAK SO-8, a 33µH shielded inductor (Wurth 74435573300), 22µF/25V X5R ceramics for bootstrap, 220nF/250V X7R ceramics for high-frequency filtering, and 100µF/160V and 330µF/35V electrolytics for bulk input/output capacitance.

Is the EV1924A-R-00A RoHS-compliant and lead-free?

Yes - per the official documentation, all MPS parts including the EV1924A-R-00A board and its MP1924AHR IC are lead-free, halogen-free, and compliant with the RoHS directive. Full green status details are published on the MPS Quality Assurance webpage.

How is the bootstrap circuit implemented on this board?

The board leverages the MP1924A's integrated bootstrap diode and supports a 115V bootstrap voltage range. External bootstrap capacitor C1 (22µF/25V X5R, 1210) connects between BST and SW pins, enabling high-side drive without discrete diode placement - reducing layout complexity and parasitic inductance.