Monolithic Power Systems Inc. EV4700-S-00A

Overview

EV4700-S-00A from Monolithic Power Systems is an evaluation board designed to demonstrate the MP4700 high-efficiency step-down LED driver IC for TV backlighting. It supports 250–300 V input, delivers regulated 250 mA LED current at up to 200 V output, and implements PWM dimming, input UVLO, over-voltage protection, and hiccup-mode short-circuit protection.

For engineers reviewing the EV4700-S-00A datasheet, EV4700-S-00A pinout, EV4700-S-00A application, or EV4700-S-00A equivalent, this board enables rapid validation of MP4700-based LED driver designs in high-voltage AC/DC TV backlight systems with boundary conduction mode operation and zero-current turn-on MOSFET control.

Technical Context

The EV4700-S-00A implements a constant-current buck controller architecture using the MP4700GS IC in SOIC-8 package. It operates in boundary conduction mode (BCM) with maximum switching frequency limited to 160 kHz and features zero-current turn-on for the main power MOSFET (STD3NK60ZT4) to minimize switching loss and eliminate freewheeling diode reverse recovery issues.

Protection functions include input undervoltage lockout (INUV pin), over-voltage protection (250 V clamp on LED string), thermal shutdown, and hiccup-mode short-circuit response. The board accepts separate 8–18 V IC supply (Vsupply) and 250–300 V high-voltage bus (VIN), enabling safe lab evaluation of high-side LED string drive under realistic TV backlight conditions.

Key Specifications

Availability

EV4700-S-00A is available at Aetrix Electronics and suitable for TV backlight development, LED driver reference design validation, and high-voltage constant-current power supply prototyping requiring stable component supply and documented test results.

Supply support for EV4700-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 core expertise in DC/DC conversion, LED drivers, and motor control solutions.

The EV4700-S-00A belongs to MPS's evaluation board product line targeting LED backlight system developers, specifically engineered to accelerate adoption of the MP4700 buck controller in 200–300 V AC/DC-powered TV and large-display applications.

FAQ

What is the primary function of the EV4700-S-00A?

The EV4700-S-00A is a fully assembled evaluation board that demonstrates the MP4700 high-efficiency step-down LED driver IC. It provides a ready-to-test platform for validating constant-current LED string drive up to 200 V and 250 mA under 250–300 V input conditions, with integrated PWM dimming, UVLO, and over-voltage protection.

Does the EV4700-S-00A include the MP4700 IC?

Yes - the board integrates the MP4700GS LED driver IC in an SOIC-8 package (U1). This controller manages boundary conduction mode operation, zero-current turn-on of the main MOSFET (Q1), and all protection functions including hiccup short-circuit response and 250 V LED over-voltage clamp.

What are the required external supplies to operate this board?

Two independent DC supplies are required: (1) a 250–300 V high-voltage source connected to the "VIN" terminals for the LED string power path, and (2) an 8–18 V auxiliary supply connected to "Vsupply" to power the MP4700 controller. Both must be enabled in sequence per the Quick Start Guide.

Can the EV4700-S-00A drive multiple LED strings?

No - the board is configured for a single LED string connection via "LED+" and "LED−" terminals, supporting up to 200 V forward voltage and 250 mA constant current. Driving parallel or series-parallel strings would require redesign of the current-sense network, compensation, and protection thresholds.

Is safety certification provided for this evaluation board?

No - the documentation explicitly states this engineering prototype has not undergone agency safety approval (e.g., UL, CE). All testing must use an isolation transformer for the AC-derived high-voltage input, and users bear full responsibility for safe lab implementation per MPS warning notice.

What PCB dimensions and mounting options does the board support?

The EV4700-S-00A measures 6.35 cm × 6.35 cm × 14 mm (2.5″ × 2.5″ × 0.55″) and features standard through-hole and surface-mount components. It includes no dedicated mounting holes or standoffs in the provided layout; mechanical integration requires custom bracketing or chassis fixation based on lab setup requirements.