Monolithic Power Systems Inc. MP3802DH-LF

Overview

MP3802DH-LF from Monolithic Power Systems is a high-voltage DC-to-AC EL lamp driver IC with 240V_PP regulated output, dual independent oscillators (50–200kHz boost, 60Hz–1kHz EL drive), 2.5–5.5V input range, 10nA shutdown current, and MSOP-8 package. It drives up to 5 in² electroluminescent lamps in battery-powered portable devices.

For engineers reviewing the MP3802DH-LF datasheet, MP3802DH-LF pinout, MP3802DH-LF application, or MP3802DH-LF equivalent, key selection factors include regulated ±120V AC output capability, separate frequency control for boost and H-bridge stages, low quiescent supply current (100µA), and split-supply operation support.

Technical Context

The MP3802DH-LF integrates a boost converter stage (with LX switching node and CS output) and an H-bridge EL driver stage (VA/VB outputs), each controlled by its own oscillator-RSW_OSC sets boost frequency (50–200kHz), REL_OSC sets lamp drive frequency (60Hz–1kHz). The device regulates output voltage to ±120V at CS and delivers 240V_PP across VA–VB.

It supports enable/disable via VEN logic thresholds (VEN-H = VDD–0.3V, VEN-L = VDD–0.6V), features 9Ω R_DS(ON) for internal switching transistors, and operates over –40°C to +85°C with θ_JA = 150°C/W in MSOP-8.

Key Specifications

Pinout & Package

The MP3802DH-LF is housed in an 8-pin MSOP package with exposed thermal pad connected to GND. Pin 1 is marked by half/full circle; pin 4 is GND and must be tied to the exposed pad for thermal and electrical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar EL lamp driver applications.

Compared with MAX14521E and TPS65131, the MP3802DH-LF uniquely combines independently adjustable boost and lamp frequencies, true single-inductor architecture, and industry-leading 10nA shutdown current-making it optimal for compact, battery-sensitive EL lighting where design flexibility and ultra-low power are critical.

Availability

MP3802DH-LF is available at Aetrix Electronics and suitable for portable multimedia players, LCD backlighting, and remote controls requiring stable component supply, RoHS-compliant packaging, and long-term production continuity.

Supply support for MP3802DH-LF 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/EL drivers, and motor control solutions.

The MP3802 belongs to MPS's high-voltage display driver product line, designed specifically for efficient, compact electroluminescent lamp excitation in space-constrained, battery-operated consumer electronics.

FAQ

What is the maximum EL lamp area supported by the MP3802DH-LF?

The MP3802DH-LF is rated to drive electroluminescent lamps up to 5 square inches, as confirmed in the official datasheet's DESCRIPTION section and typical application schematic. This rating assumes proper external component selection-including a 150V NPO ceramic capacitor at CS and appropriate inductor value-and operation within the specified 60Hz–1kHz lamp frequency range.

Does the MP3802DH-LF require an external H-bridge?

No. The MP3802DH-LF integrates a complete H-bridge driver stage with internal MOSFETs connected to VA and VB pins. External components needed are limited to one inductor, one CS capacitor, and two frequency-setting resistors-no external transistors or bridge controllers are required.

How is enable/disable functionality implemented on the MP3802DH-LF?

Enable/disable is controlled through logic-level signals applied to the VEN pin (pin not explicitly labeled in pin table but functionally defined in Electrical Characteristics as VEN-H/VEN-L thresholds). When VEN is pulled below VDD–0.6V, the device enters shutdown with 10nA current draw; pulling above VDD–0.3V activates normal operation.

Can the MP3802DH-LF operate from a 3.3V supply?

Yes. The MP3802DH-LF supports input voltages from 2.5V to 5.5V, fully covering standard 3.3V logic rails. At 3.3V input, it maintains 240V_PP output regulation and meets all specified electrical characteristics, including 100µA supply current and 250Hz typical lamp frequency.

What thermal considerations apply to the MSOP-8 package?

The MSOP-8 package has θ_JA = 150°C/W and θ_JC = 65°C/W. To maintain safe junction temperature, the exposed thermal pad (pin 4/GND) must be soldered to a minimum 1-inch² copper pour on the PCB. Without this, thermal resistance rises significantly, risking derating or thermal shutdown under sustained load.

Is the MP3802DH-LF RoHS compliant?

Yes. The "-LF" suffix in MP3802DH-LF explicitly denotes lead-free, RoHS-compliant packaging per the manufacturer's package nomenclature guide. This includes compliant terminations and halogen-free molding compound, verified per JEDEC J-STD-609A standards.

What is the purpose of the CS pin?

The CS pin is the regulated high-voltage output of the internal boost converter stage, delivering ±120V DC. It serves as the power rail for the integrated H-bridge and must be decoupled with a 150V-rated NPO ceramic capacitor to stabilize energy transfer and minimize ripple before AC inversion at VA/VB.