Monolithic Power Systems Inc. MP24830HS-LF-P

Overview

MP24830HS-LF-P from Monolithic Power Systems is a 90V white LED driver IC supporting buck and inverting buck-boost topologies, with programmable switching frequency (30–465 kHz), 0.2V feedback reference, integrated analog/PWM dimming on a single pin, and comprehensive protection including open-string, short-circuit, thermal shutdown, and cycle-by-cycle current limiting. It operates across 4.5V–85V input and delivers stable current regulation for automotive LED lighting and LCD backlighting.

For engineers reviewing the MP24830HS-LF-P datasheet, MP24830HS-LF-P pinout, MP24830HS-LF-P application, or MP24830HS-LF-P equivalent, key selection considerations include its dual-mode topology support, 14-pin SOIC package with exposed pad, 0.2V precision current-sense reference, 10μA shutdown current, and compatibility with low-ESR ceramic output capacitors without minimum LED count requirements.

Technical Context

The MP24830HS-LF-P implements current-mode control using an internal error amplifier (80 μs transconductance) and peak-current sensing via the CS pin, enabling fast transient response and simplified loop compensation. Its dual-buck/buck-boost architecture allows operation where LED string voltage may exceed or fall below input voltage-critical for automotive 12V/24V systems with variable load conditions.

Dimming is implemented through a unified DIM pin accepting 0.6–1.95V analog control or 100Hz–2kHz PWM signals >2V, with DIMO providing buffered gate drive for external dimming MOSFETs. Protection logic includes latched shutdown on FB ≥600mV (immediate) or ≥300mV for 450μs, OVP threshold set via external divider (0.4–1.2V at OVP pin), and foldback frequency reduction during output short-circuit events.

Key Specifications

Pinout & Package

MP24830HS-LF-P is housed in a 14-pin SOIC package with exposed thermal pad (pin 12 VSS connected to pad). The package supports high-voltage isolation and efficient heat dissipation in space-constrained LED driver designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar white LED driver applications.

Compared with MP24830HS-LF-P, MPQ24830HS-AEC1 adds automotive qualification without changing functionality, while LT3762 trades integrated dimming simplicity for higher voltage headroom and tighter reference accuracy-making each optimal for distinct reliability or voltage-class requirements.

Availability

MP24830HS-LF-P is available at Aetrix Electronics and suitable for automotive LED lighting, LCD backlighting, and outdoor signage illumination requiring stable component supply across extended temperature ranges and high-reliability production cycles.

Supply support for MP24830HS-LF-P 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 MP24830 belongs to MPS's high-voltage LED driver product line, designed specifically for automotive and industrial lighting applications demanding wide input range, dual topology flexibility, and integrated protection without external supervision.

FAQ

What is the maximum LED string voltage supported by MP24830HS-LF-P in buck-boost mode?

In buck-boost configuration, the MP24830HS-LF-P supports LED string voltages up to 85V-limited by its 85V VDD rating and internal OVP threshold of 1.2V (set externally via resistor divider). The actual maximum depends on external component ratings, especially the MOSFET breakdown voltage and Schottky diode reverse voltage.

Can MP24830HS-LF-P operate with only one LED in the string?

Yes. Unlike many LED drivers requiring minimum string voltage, the MP24830HS-LF-P imposes no minimum LED count-it functions correctly with a single LED (e.g., 3.2V forward voltage) in buck mode when input exceeds LED voltage, or in buck-boost mode regardless of relative voltage levels.

How does the DIMO pin improve dimming performance compared to using DIM directly?

DIMO provides a dedicated push-pull gate driver (±50mA) that isolates the internal dimming logic from external MOSFET gate capacitance, enabling faster switching edges and reduced jitter in high-frequency PWM dimming (>1kHz). This improves dimming linearity and eliminates shoot-through risk in external FET control.

What is the purpose of the INGND pin, and why is it separate from VSS?

INGND serves as the reference for EN and DIM inputs, allowing those signals to be referenced to the input supply rail rather than the power return (VSS). This enables direct interface with microcontrollers powered from the same input rail-eliminating level shifters-and supports negative dimming control in buck-boost topologies where LED– is not at system ground.

Does MP24830HS-LF-P require an external bootstrap diode?

No. The MP24830HS-LF-P integrates an internal bootstrap diode between VDD and BST pins. Only an external 100nF ceramic capacitor between BST and SW is required to form the floating gate drive supply for the high-side MOSFET in buck-boost operation.

How is over-voltage protection triggered and reset?

OVP triggers when the voltage at the OVP pin exceeds 1.2V (typical), causing immediate latch-off. Recovery occurs automatically when OVP pin voltage falls below 1.2V minus hysteresis (~50mV), provided FB voltage also rises above 0.1V-ensuring the LED string is reconnected before restart.

What thermal derating applies above 25°C ambient?

With θJA = 86°C/W, the MP24830HS-LF-P's maximum continuous power dissipation decreases linearly: PD(MAX) = (150°C − TA)/86°C/W. At 85°C ambient, maximum dissipation drops to 0.76W-requiring careful thermal design or reduced load current to avoid thermal shutdown.