Monolithic Power Systems Inc. EV3307-J-00A

Overview

EV3307-J-00A from Monolithic Power Systems is a non-synchronized white LED driver evaluation board built around the MP3307 step-up DC/DC converter IC, supporting 2.7–5.5V input, up to 24V LED output, 40mA LED current, and programmable switching frequency up to 2.2MHz for video display backlighting applications.

For engineers reviewing the EV3307-J-00A datasheet, EV3307-J-00A pinout, EV3307-J-00A application, or EV3307-J-00A equivalent, this board enables rapid validation of MP3307-based WLED driver designs with analog/PWM dimming, open-load protection, and thermal shutdown in compact TSOT23-8 layouts.

Technical Context

The EV3307-J-00A implements the MP3307's peak-current-mode control architecture using an external 3.3µH inductor (Wurth 7440700033), B0540W Schottky diode, and low-side current-sense resistor network to regulate LED current. It supports dual-dimming inputs: EN/PWML (100Hz–2kHz PWM) and PWMH (>20kHz analog dimming).

Board-level protections mirror the MP3307's internal features: 24V open-load OVP threshold set by R2=0Ω, cycle-by-cycle current limiting, UVLO at ~2.3V, and thermal shutdown. Input filtering uses 4.7µF/10V (C1) and 4.7µF/50V (C3) X5R/X7R ceramics in 0805 and 1210 packages.

Key Specifications

Availability

EV3307-J-00A is available at Aetrix Electronics and suitable for video displays, in-car LCD infotainment systems, and tablet backlight development requiring stable component supply and fast-turn evaluation capability.

Supply support for EV3307-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 MP3307 product line delivers compact, high-frequency step-up LED drivers optimized for portable display backlighting, emphasizing low feedback voltage (200mV), integrated protection, and flexible dimming interfaces.

FAQ

What input voltage range does the EV3307-J-00A support?

The board accepts 2.7V to 5.5V DC input, matching the MP3307 IC's operating range. This covers common single-cell lithium-ion batteries (3.0–4.2V) and regulated 3.3V or 5V system supplies. Operation below 2.7V triggers UVLO, disabling switching.

How is LED current set on this evaluation board?

LED current is set by the external sense resistor network-primarily R4 and R7 per the schematic. With R4 = 100kΩ and R7 = NC, the default configuration achieves 40mA based on the MP3307's 200mV feedback reference and internal gain. Adjusting R4 changes ILED linearly.

Does the board support both analog and PWM dimming simultaneously?

No-EN/PWML and PWMH are separate control inputs with distinct functions: EN/PWML enables/disables or PWM-dims the LED string (100Hz–2kHz), while PWMH provides analog dimming via duty-cycle modulation (>20kHz). Using both concurrently is not supported per design intent.

What is the purpose of the OVP pin and how is it configured?

The OVP pin sets the open-load protection threshold. With R2 = 0Ω as shipped, the internal resistor divider fixes OVP at 24V. Changing R2 alters the threshold per the MP3307 datasheet equation; exceeding VLED during open-circuit triggers shutdown.

Can the EV3307-J-00A drive multiple LED strings?

No-it is designed for a single LED string only, as confirmed by the schematic (one LED+ and one LED− terminal pair), bill of materials (single B0540W diode, single inductor), and MP3307's single-channel architecture. Multi-string operation requires separate drivers or a different IC.

Is the board RoHS-compliant and lead-free?

Yes-per the documentation, all MPS components including the MP3307 IC and associated passives on EV3307-J-00A meet RoHS requirements and are halogen-free. The board uses lead-free solder and complies with EU Directive 2011/65/EU.