Monolithic Power Systems Inc. EV24895-J-00A

Overview

EV24895-J-00A from Monolithic Power Systems is an evaluation board for the MP24895GJ step-down white LED driver IC, supporting 9–30V input and delivering up to 750mA LED current with hysteretic current-mode control. It implements both PWM and analog dimming on a single EN/DIM pin, features a 100mV feedback voltage, and integrates thermal shutdown and UVLO protection for robust LED lighting operation in automotive and signage applications.

For engineers reviewing the EV24895-J-00A datasheet, EV24895-J-00A pinout, EV24895-J-00A application, or EV24895-J-00A equivalent, this board enables rapid validation of MP24895GJ-based LED driver designs-including dimming interface configuration, efficiency measurement at 750mA, thermal behavior under 30V input, and PCB layout reference for TSOT23-5 switching regulator placement.

Technical Context

The EV24895-J-00A implements the MP24895GJ's hysteretic current-mode architecture, eliminating need for loop compensation while enabling sub-microsecond transient response. Its high-side current-sense topology uses R1 (0.4Ω) and R2 (0.2Ω) in parallel to set 750mA LED current via 100mV reference voltage.

Dimming is implemented through dual-mode EN/DIM pin control: 200Hz–2kHz PWM signal for 1000:1 resolution, or 0.3–2.5V analog voltage for linear intensity control. Input filtering uses C1 (2.2µF/50V X7R) and C2 (220µF/35V electrolytic), while L1 (47µH/1.45A) and D1–D5 (B260A Schottky diodes) form the power stage.

Key Specifications

Availability

EV24895-J-00A is available at Aetrix Electronics and suitable for LED backlighting validation, automotive interior lighting qualification, and emergency signage power supply development requiring stable component supply and fast-turn evaluation support.

Supply support for EV24895-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 MP24895 product line targets high-brightness white LED applications requiring wide-input, high-current, and dual-dimming capability-optimized for cost-sensitive, thermally constrained lighting systems where loop stability and layout simplicity are critical.

FAQ

What input power sources are compatible with the EV24895-J-00A?

The board accepts 9–30V DC or AC directly at the AC1/AC2 terminals. When using AC, internal rectification by D1–D5 enables operation without external bridge; for DC, polarity must match AC1 (+) and AC2 (–). No external rectifier or bulk capacitor is required beyond the onboard C2.

How is LED current adjusted on this evaluation board?

LED current is set by the parallel resistance of R1 (0.4Ω) and R2 (0.2Ω), yielding 0.133Ω total, which produces 750mA at 100mV sense voltage. To change current, replace R1/R2 with values satisfying R_SENSE = 0.1V / I_LED; R4 and R5 positions allow optional resistor swapping per Quick Start Guide instructions.

Can the EV24895-J-00A support both PWM and analog dimming simultaneously?

No-PWM and analog dimming are mutually exclusive modes selected by hardware configuration. PWM requires R5 removed and R4 fitted with 1kΩ; analog requires R4 open and R5 shorted. The EN/DIM pin cannot interpret mixed signals, and simultaneous application may cause unstable LED current regulation.

What is the role of the NC components (Q1, C4, C5, R3, R4, R6) on the board?

These are no-connect placeholders for optional functionality or alternate configurations: Q1 supports external synchronous rectification; C4/C5 provide additional AGND/PGND decoupling; R3/R4/R6 enable alternative dimming resistor networks or feedback adjustments. They are unpopulated in the default Rev.1.0 build and serve no function unless modified per application notes.

Does the board include thermal monitoring or reporting circuitry?

No-the EV24895-J-00A relies on the MP24895GJ's internal thermal shutdown (triggering at ~150°C junction temperature), but provides no external temperature sensor, analog output, or digital interface for thermal telemetry. Board-level thermal performance must be assessed via IR imaging or thermocouple on U1's exposed pad and L1 surface.

Is the MP24895GJ on this board lead-free and RoHS-compliant?

Yes-the MP24895GJ-Z variant mounted on EV24895-J-00A is lead-free and fully RoHS 2011/65/EU compliant, as confirmed by MPS green status documentation. All passive components (C1–C3, R1–R5, L1, D1–D5) also meet RoHS requirements per manufacturer part numbers listed in the BOM.