Monolithic Power Systems Inc. EV1924-R-00A

Overview

EV1924-R-00A from Monolithic Power Systems is a dedicated evaluation board for the MP1924 high-frequency half-bridge gate driver IC, configured as a buck converter with independent high-side and low-side PWM control inputs (INH/INL), 100V input capability, and <5ns channel matching. It supports 9–16V driver supply and integrates on-chip bootstrap diode and UVLO protection.

For engineers reviewing the EV1924-R-00A datasheet, EV1924-R-00A pinout, EV1924-R-00A application, or EV1924-R-00A equivalent, this board enables rapid validation of MP1924-based half-bridge power stages in telecom DC/DC, motor drive, and avionics converters under real-world switching conditions with precise dead-time implementation.

Technical Context

The EV1924-R-00A implements a functional buck topology using the MP1924HR QFN-10 gate driver, with SW node connected to external MOSFETs (AM4490N) and bootstrap circuitry supporting up to 118V floating voltage. Input power (0–100V) feeds the high-side switch via C7–C10 (220nF/250V X7R) and output filtering uses C15 (330μF/35V) and L1 (33μH).

Control signals INH and INL accept TTL-compatible complementary PWMs; propagation delay is 20ns typical, and gate driver matching is <5ns. The board includes test points for DRVH, DRVL, INH, INL, and SW, plus header interfaces (CN1–CN4) for signal injection and load connection.

Key Specifications

Availability

EV1924-R-00A is available at Aetrix Electronics and suitable for telecom half-bridge power supplies, avionics DC/DC converters, and motor driver reference designs requiring stable component supply, fast prototyping turnaround, and validated gate-drive timing performance.

Supply support for EV1924-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 analog and power ICs, with core expertise in DC/DC conversion, gate drivers, and motor control solutions.

The MP1924 product line delivers high-frequency, matched half-bridge gate drivers optimized for efficiency-critical, space-constrained applications such as telecom infrastructure and aerospace power systems.

FAQ

What is the maximum input voltage supported by the EV1924-R-00A board?

The board supports up to 100 V DC input voltage, verified by its use of 250 V-rated ceramic capacitors (C7–C10) and 160 V electrolytic capacitor (C6) on the input stage, aligning with the MP1924's 118 V bootstrap rating and safe operation under transient overvoltage conditions.

Does the EV1924-R-00A include the MP1924 IC?

Yes, the board integrates the MP1924HR QFN-10 gate driver IC (U1), as confirmed by the BOM and schematic. It is factory-assembled with the IC mounted and tested, enabling immediate functional evaluation without component substitution.

Can the EV1924-R-00A be used with external MOSFETs other than AM4490N?

Yes - the board provides accessible SW, DRVH, DRVL, and GND nodes with Kelvin connections. While AM4490N MOSFETs (M1/M2) are installed, the layout supports replacement with compatible N-channel MOSFETs meeting voltage, current, and gate charge requirements for the target application.

What is the purpose of CN3 and CN4 headers?

CN3 and CN4 provide isolated, TTL-compatible access to INH_INT, INL_INT, INH_EXT, and INL_EXT signals, allowing engineers to inject custom complementary PWM waveforms with controlled dead time - essential for validating timing margins and avoiding cross-conduction in half-bridge topologies.

Is a heatsink required for continuous operation?

No dedicated heatsink is required under typical evaluation conditions. The board uses SO-8 packaged AM4490N MOSFETs with 8.5 A rating and thermal vias under U1 (MP1924HR); thermal performance is validated per MPS Rev.1.0 design, assuming ambient ≤40°C and moderate duty cycles.

How is bootstrap capacitor selection validated on this board?

The board uses four parallel 220 nF/250 V X7R ceramics (C7–C10) for bootstrap coupling, providing low-ESR, high-voltage hold-up and minimizing voltage droop during high-frequency switching - consistent with MP1924's 20 ns propagation delay and <5 ns matching requirements.