Monolithic Power Systems Inc. EV24830-S-00A

Overview

EV24830-S-00A from Monolithic Power Systems is an evaluation board for the MP24830 buck-boost white LED driver IC, supporting 5V–90V input and programmable 200 kHz switching frequency, with integrated analog/PWM dimming, 1 A LED current capability, and 28 V output overvoltage protection. It enables rapid validation of high-voltage LED lighting designs in automotive and LCD backlight applications.

For engineers reviewing the EV24830-S-00A datasheet, EV24830-S-00A pinout, EV24830-S-00A application, or EV24830-S-00A equivalent, this board provides verified reference design implementation, thermal performance data, efficiency curves across LED string voltages (10–40 V), and functional validation of open-string, short-circuit, and thermal shutdown protections under real operating conditions.

Technical Context

The EV24830-S-00A implements the MP24830 IC in a fixed-buck-boost topology with external MOSFETs (Q1: FDD86102, Q2: Si4100DY) and a 22 μH power inductor. It operates in current-mode control with cycle-by-cycle peak current limiting and supports dual dimming via a single DIM pin-accepting 0.7–2.0 V analog signals or 100 Hz–20 kHz PWM inputs.

Input voltage range spans 5 V to <80 V (VIN + VOUT), enabling operation across wide LED string configurations (3–10 LEDs). Protection features include output overvoltage clamp at 28 V, thermal shutdown, open-string detection, and short-circuit recovery-all validated on the board per MPS Rev. 1.1 test reports at TA = 25°C.

Key Specifications

Availability

EV24830-S-00A is available at Aetrix Electronics and suitable for automotive LED lighting, LCD backlight panels, general LED illumination, and handheld computer display development requiring stable component supply and fast-turn prototyping support.

Supply support for EV24830-S-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 expertise in DC/DC conversion, LED drivers, and motor control solutions.

The MP24830 product line targets high-input-voltage LED lighting systems requiring buck-boost topology flexibility, robust fault protection, and dual dimming-designed specifically for automotive cabin lighting, commercial signage, and large-panel LCD backlights.

FAQ

What is the maximum LED string voltage supported by the EV24830-S-00A?

The board implements 28 V output overvoltage protection (VOVP), limiting safe LED string voltage to ≤25 V (e.g., 7× white LEDs at ~3.6 V each). Exceeding this triggers immediate shutdown to protect the MP24830 IC and external components.

Can the switching frequency be adjusted, and how?

Yes. Frequency is set by resistor R6 (100 kΩ default), which programs the MP24830's internal oscillator. Replacing R6 changes frequency per the formula FS ≈ 1.1×10⁶ / R6 (Ω); values from 51 kΩ to 200 kΩ yield ~22 kHz to ~430 kHz, verified in MPS application notes.

Does the board support both analog and PWM dimming simultaneously?

No. The DIM pin accepts either analog voltage (0.7–2.0 V) or PWM signal (5 V amplitude, 100 Hz–20 kHz), but not both concurrently. The MP24830 internally detects mode based on signal characteristics-no external configuration is required.

What thermal protection behavior is observed during overload testing?

Under sustained overcurrent or ambient >125°C, the MP24830 enters thermal shutdown: switching halts, DIMO goes low, and the board remains latched off until junction temperature drops below ~145°C, then auto-restarts-verified in thermal imaging tests on Rev. 1.1 board.

Is the EN pin compatible with 3.3 V logic control?

No. The EN pin requires ≥5 V to enable operation, as specified in the MP24830 datasheet. Applying 3.3 V results in undervoltage lockout; level-shifting circuitry or a 5 V rail is mandatory for reliable enable/disable sequencing.

What is the purpose of the separate INGND pin on the board?

The INGND pin isolates the input return path from signal ground, minimizing noise coupling into the MP24830's sensitive current-sense and feedback nodes. This improves stability during high di/dt switching and ensures accurate 1 A LED current regulation across input transients.