Monolithic Power Systems Inc. EV24894-J-00A

Overview

EV24894-J-00A from Monolithic Power Systems is an evaluation board for the MP24894GJ step-down WLED current controller IC, designed to drive up to 1 A of LED current from 6 V to 60 V input with hysteretic control, 2500:1 PWM dimming resolution, and integrated open/short LED protection.

For engineers reviewing the EV24894-J-00A datasheet, EV24894-J-00A pinout, EV24894-J-00A application, or EV24894-J-00A equivalent, this board enables rapid validation of high-efficiency LED driver designs in automotive lighting, emergency signage, and low-voltage general illumination systems requiring stable constant-current output and dual dimming control.

Technical Context

The EV24894-J-00A implements the MP24894GJ's hysteretic control architecture, eliminating loop compensation while delivering fast transient response and stable regulation via high-side current-sensing (R_S = 0.2 Ω) with 200 mV feedback reference. It supports both analog dimming (0.3–2.7 V DC) and PWM dimming (100 Hz–20 kHz) on the EN/DIM pin.

Board-level protections include thermal shutdown, open-LED detection, and short-LED recovery-verified under VIN = 24 V, 3-LED string, I_LED = 1 A, T_A = 25 °C. Efficiency exceeds 95% across 10–60 V input range per test data.

Key Specifications

Availability

EV24894-J-00A is available at Aetrix Electronics and suitable for automotive LED lighting validation, emergency signage qualification, and low-voltage halogen replacement prototyping requiring stable component supply and full-feature driver evaluation.

Supply support for EV24894-J-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, LED drivers, and motor control solutions.

The MP24894 product line targets high-efficiency, wide-input LED current controllers for industrial and automotive lighting, emphasizing hysteretic control simplicity, high dimming resolution, and robust fault protection without external compensation.

FAQ

What input voltage range does the EV24894-J-00A support?

The board operates from 6 V to 60 V DC input, matching the MP24894GJ's rated range. This allows direct testing with 12 V, 24 V, and 48 V industrial or automotive supplies without intermediate regulation stages.

How is LED current set on this evaluation board?

LED current is set by the 0.2 Ω, 1%, 0805 current-sense resistor (R1) and the MP24894GJ's 200 mV internal feedback reference, yielding a nominal 1 A output (I_LED = 0.2 V / 0.2 Ω). No trimming or recalibration is required for baseline operation.

Does the board support both analog and PWM dimming simultaneously?

No-dimming mode is selected by the signal applied to the EN/DIM pin: DC voltage (0.3–2.7 V) enables analog dimming; PWM waveform (≥3 V high, ≤0.25 V low, 100 Hz–20 kHz) enables PWM dimming. Both cannot be active concurrently.

What protections are implemented and how are they verified?

The board demonstrates thermal shutdown, open-LED, and short-LED protection per test waveforms in the reference document (pages 4–5). Recovery behavior is observable on oscilloscope traces showing automatic restart after fault removal.

Can the EV24894-J-00A drive more than three LEDs in series?

Yes-the MP24894GJ supports V_OUT < V_IN, so the maximum LED string voltage depends on input voltage and forward voltage drop. With 60 V input and typical 3.2 V/LED, up to 18 LEDs (57.6 V) can be driven, provided thermal and layout constraints are met.

Is the MP24894GJ IC included on the board, and what package is used?

Yes-the board integrates the MP24894GJ-Z IC in TSOT-23-6 (TSOT6) package, as confirmed in the Bill of Materials (page 3). The IC is soldered and fully functional; no additional mounting or configuration is needed for basic operation.