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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > LED Drivers

Monolithic Power Systems Inc. MP24830HS-LF-Z

Name: MP24830HS-LF-Z
Brand: Monolithic Power Systems Inc.
SKU: MP24830HS-LF-Z
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MP24830HS-LF-Z

Manufacturer:: Monolithic Power Systems Inc.

Category:: LED Drivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: MP24830HS-LF-Z.pdf

Description:: IC LED DRIVER CTRLR PWM 14SOIC

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Product details

Overview

MP24830HS-LF-Z from Monolithic Power Systems is a 90V white LED driver IC supporting both buck and inverting buck-boost topologies, with programmable switching frequency (30–465 kHz), 0.2V feedback reference, and integrated analog/PWM dimming on a single pin. It delivers up to 1A output current, operates from 4.5V–85V input, and provides cycle-by-cycle over-current, open-string, short-circuit, and thermal shutdown protection - deployed in automotive LED headlamps and LCD backlight systems.

For engineers reviewing the MP24830HS-LF-Z datasheet, MP24830HS-LF-Z pinout, MP24830HS-LF-Z application, or MP24830HS-LF-Z equivalent, key selection considerations include its dual-mode topology support, 14-pin SOIC package with exposed thermal pad, 0.2V precision current-sense reference, DIM/EN logic referenced to INGND for high-side dimming control, and OVP threshold programmability via external resistor divider.

Technical Context

The MP24830HS-LF-Z implements current-mode control using an internal error amplifier (80 µs transconductance) and peak-current sensing through the CS pin, enabling fast transient response and stable loop compensation across wide input/output voltage ranges. Its architecture supports both buck and buck-boost configurations without external topology reconfiguration - determined by external component placement rather than internal logic.

Dimming is implemented via 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 functions are hardware-based: open-string detection triggers at FB <0.1V + OVP >1.2V; short-circuit latching occurs at FB >600mV (immediate) or >300mV for 450µs.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 85V - supports direct connection to 12V/24V/48V industrial and automotive supplies without pre-regulation
Feedback Reference Voltage	0.2V ±4% - enables precise LED current regulation with low-power sense resistors (e.g., 0.2Ω @ 1A = 200mW)
Switching Frequency Range	30 kHz to 465 kHz - adjustable via RSET pin; default 350 kHz when open; allows EMI optimization and inductor size trade-offs
Dimming Interface	Analog (0.6–1.95V) + PWM (100Hz–2kHz) on single DIM pin - eliminates need for separate control lines and simplifies MCU GPIO usage
Protection Features	Cycle-by-cycle current limit, thermal shutdown (160°C), open-string (OVP >1.2V), short-circuit latch-off (FB >600mV) - autonomous fault handling without host intervention
Quiescent Current	10–23 µA in shutdown (EN = 0V) - suitable for always-on automotive modules requiring low standby power
Package Thermal Resistance	θJA = 86°C/W (SOIC-14) - enables 1.4W continuous dissipation at +25°C ambient, supporting high-current LED strings without forced cooling

Pinout & Package

MP24830HS-LF-Z is housed in a 14-pin SOIC package with exposed thermal pad on underside (pin 12 VSS connected to pad). The package meets RoHS and halogen-free requirements, with 0.050" lead pitch and JEDEC MS-012 AB compliance.

Pin	Circuit Role	Design Meaning
1 DR	High-side gate driver output	Drives external N-channel MOSFET gate; requires bootstrap capacitor (BST–SW) for high-side operation in buck-boost mode
2 CS	High-side current sense input	Connects to source of high-side switch; senses peak inductor current for cycle-by-cycle limiting and current-mode control
3 VDD	Main supply input	4.5V–85V unregulated input; bypassed with ceramic capacitor to suppress switching noise and input transients
4 INGND	Input ground reference	Reference node for EN and DIM signals; isolates control logic from power ground noise in high-side dimming configurations
5 DIM	Combined analog/PWM dimming input	Voltage range 0.6–1.95V sets LED current linearly; >2V enables full current; PWM edges directly modulate output current
6 EN	Enable input	Active-high enable referenced to INGND; thresholds at 0.4V (off) and 1.4V (on); supports system-level power sequencing
7 RSET	Frequency programming input	Resistor-to-VSS sets fSW: 100kΩ → ~215 kHz; open → 350 kHz; 380kΩ → ~50 kHz - enables EMI tuning and efficiency optimization
8 OVP	Over-voltage protection monitor	Voltage divider from LED+ sets shutdown threshold (1.2V internal trip); also detects short-circuit when OVP <0.4V + FB <0.1V
9 COMP	Error amplifier output	Connects to RC network (R_COMP, C_Z, C_P) for loop compensation; integrates FB error to regulate peak inductor current
10 FB	Current-sense feedback input	Monitors voltage across external sense resistor; regulated at 0.2V; triggers short-circuit protection if >300mV for 450µs
11 DIMO	Dimming output driver	Push-pull output (±50mA) synchronized to DIM logic; drives external dimming FET gate for high-fidelity PWM dimming
12 VSS	Power return / thermal pad connection	Main ground reference for all internal circuits; exposed pad must be soldered to PCB copper for thermal performance and noise immunity
13 BST	Bootstrap supply input	Connects to ceramic capacitor (≥100nF) between BST and SW; generates floating gate drive voltage for high-side MOSFET
14 SW	Switch node	Connects to source of high-side MOSFET and cathode of Schottky diode; carries full switching current and high dv/dt

Key Features

Feature	Design Value
Buck-buck-boost topology flexibility	Single IC supports step-down (buck) and inverting step-up/down (buck-boost) without changing IC - reduces BOM count and design validation effort
Integrated dual-dimming interface	DIM pin accepts analog voltage or PWM signal without external logic; DIMO provides dedicated gate drive for external dimming FET - eliminates need for discrete dimming circuitry
Low-noise current-sense architecture	0.2V reference with ±4% tolerance and 50nA max feedback bias current - enables accurate current regulation with minimal sense resistor power loss
Robust fault protection suite	Hardware-latched short-circuit protection, open-string OVP, thermal shutdown, and cycle-by-cycle current limiting - ensures fail-safe operation in harsh automotive environments
Stable with ceramic output capacitors	Compensation designed for low-ESR ceramic caps (no electrolytic required); supports compact, long-life LED driver designs with no capacitor aging concerns

Applications

Automotive Headlamp Driver

LCD Backlight Controller

Use Scenario: Driving 4–8串联 white LEDs in 12V/24V vehicle electrical systems with variable battery voltage and load dump transients.

IC Role / Device Role / Timing Role: Constant-current LED driver operating in buck mode; regulates LED string current independent of input voltage fluctuations and temperature drift.

Use Value: Maintains consistent luminance across 9–16V battery range; withstands 85V load dump pulses via 90V absolute max rating; thermal shutdown prevents damage during parking lamp duty cycles.

Use Scenario: Powering edge-lit LCD panels in industrial HMIs and medical displays requiring flicker-free dimming and high PSRR.

IC Role / Device Role / Timing Role: Buck-boost LED driver with analog dimming; delivers stable current while accommodating varying LED forward voltage across temperature and aging.

Use Value: 0.2V reference enables <1% current accuracy; DIMO output synchronizes external FET for 10,000:1 PWM dimming ratio; low EMI operation avoids display interference.

Industrial High-Bay Lighting

Truck & Bus Tail Light Module

Use Scenario: Driving high-power LED arrays (up to 1A) in 48V DC-powered warehouse lighting with ambient temperatures up to +85°C.

IC Role / Device Role / Timing Role: Buck-mode constant-current regulator with programmable frequency; optimized for 200–300 kHz switching to balance efficiency and magnetics size.

Use Value: 86°C/W θJA enables full 1A output at +85°C ambient without heatsink; cycle-by-cycle current limit prevents inrush damage during hot-plug events.

Use Scenario: Controlling red/amber LED strings in commercial vehicle tail lights with CAN-controlled dimming and diagnostic reporting.

IC Role / Device Role / Timing Role: Fault-tolerant LED driver with open-string and short-circuit detection; EN pin interfaces with vehicle controller for on/off and error signaling.

Use Value: Latch-off on LED short prevents bus overcurrent; OVP pin voltage reports string status to microcontroller; 10µA shutdown current meets ISO 16750 quiescent requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MPQ24830-AQ	Automotive-grade AEC-Q100 qualified version; identical electrical specs but enhanced ESD (±8kV HBM) and extended temp range (–40°C to +125°C junction)	Required for ASIL-B compliant lighting modules; supports higher ambient temperature operation in engine bay mounting	Select MPQ24830-AQ for automotive production programs requiring qualification evidence and extended reliability testing
LT3761EFE#PBF	Higher max input (95V), integrated boost diode, but requires external compensation and lacks integrated DIMO driver; 16-pin TSSOP package	Better suited for boost-only applications with tight board space; dimming requires external FET driver circuit	Choose LT3761EFE#PBF only when boost topology dominates and integrated dimming driver is not required

Compared with MP24830HS-LF-Z, the MPQ24830-AQ adds automotive qualification without sacrificing features, while the LT3761EFE#PBF trades integration for higher voltage margin and boost optimization - making MP24830HS-LF-Z optimal for cost-sensitive buck/buck-boost LED drivers needing unified dimming and robust protection in industrial and non-AEC-Q100 automotive segments.

Availability

MP24830HS-LF-Z is available at Aetrix Electronics and suitable for automotive LED lighting, LCD backlight systems, and industrial high-bay luminaires requiring stable component supply, RoHS-compliant packaging, and long-term manufacturing continuity.

Supply support for MP24830HS-LF-Z 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, engineered specifically for automotive and industrial lighting applications demanding wide input range, topology flexibility, and integrated protection - reducing system complexity and improving field reliability.

FAQ

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

In buck-boost configuration, the MP24830HS-LF-Z supports LED string voltages exceeding the input supply - up to 85V (limited by VDD–VSS absolute max rating). The actual maximum depends on external MOSFET and diode ratings, but the IC itself regulates correctly with V_LED = 100V when V_IN = 12V, provided external components are rated accordingly and layout minimizes parasitic inductance.

Can MP24830HS-LF-Z operate without an external MOSFET in buck mode?

No. The MP24830HS-LF-Z is a controller IC - it does not integrate a power switch. In buck mode, it requires an external N-channel MOSFET connected between SW and VSS, plus a Schottky diode from SW to LED–. The DR pin drives the MOSFET gate, and BST–SW capacitor supplies the gate drive voltage.

How is the 0.2V feedback reference used to set LED current?

LED current is set by a sense resistor (R_FB) between FB and VSS: I_LED = 0.2V / R_FB. For example, a 0.2Ω resistor yields 1A nominal current. The FB pin draws only ±50nA, so resistor tolerance and temperature coefficient dominate accuracy - 1% metal film resistors are recommended for <2% total current error.

Does MP24830HS-LF-Z support PWM dimming frequencies above 2kHz?

The datasheet specifies optimal PWM dimming between 100Hz and 2kHz. While higher frequencies (e.g., 10kHz) may function, they degrade dimming linearity due to limited DIMO slew rate and internal comparator propagation delay. For >2kHz dimming, use the DIMO pin to drive an external MOSFET with faster gate characteristics and optimized gate resistor.

What is the purpose of the INGND pin, and can it be tied to VSS?

INGND provides a dedicated reference for DIM and EN signals, isolating control logic from power ground noise - critical for stable dimming in high-current buck-boost layouts. It must not be tied directly to VSS if the LED string is grounded (common-anode configuration); doing so defeats the isolation benefit and risks false dimming or enable behavior due to ground bounce.

How does the MP24830HS-LF-Z respond to an open LED string?

When the LED string opens, FB falls near 0V and OVP rises due to the voltage divider. Once OVP exceeds 1.2V, the IC disables switching and enters latch-off state. Recovery requires cycling EN or removing/reapplying input power. No automatic retry occurs - this prevents uncontrolled voltage rise and protects downstream components.

Is thermal derating required for continuous 1A operation in SOIC-14 package?

Yes. At +85°C ambient, the SOIC-14 package's 86°C/W θJA limits continuous power dissipation to ~0.5W. With typical 85% efficiency at 1A/40V output, power dissipation is ~0.7W - requiring either reduced load current, forced airflow, or use of the QFN-14 package (θJA = 49°C/W) for full 1A operation at elevated temperatures.

MP24830HS-LF-Z Specifications

Product attributes: Attribute value

Manufacturer:: Monolithic Power Systems Inc.

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: DC DC Controller

Topology:: Step-Down (Buck), Step-Up (Boost)

Internal Switch(s):: No

Number of Outputs:: 1

Voltage - Supply (Min):: 4.5V

Voltage - Supply (Max):: 85V

Voltage - Output:: -

Current - Output / Channel:: -

Frequency:: -

Dimming:: Analog, PWM

Applications:: Backlight

Operating Temperature:: -40°C ~ 125°C (TJ)

Grade:: Automotive

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SOIC

MP24830HS-LF-Z FAQ

1.How can I place an order for MP24830HS-LF-Z through Aetrix?

Please submit a Request for Quotation (RFQ) for MP24830HS-LF-Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MP24830HS-LF-Z reliable?

The price and inventory of MP24830HS-LF-Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP24830HS-LF-Z is usually 5 days.

3.What payment methods are accepted for MP24830HS-LF-Z?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP24830HS-LF-Z transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MP24830HS-LF-Z?

MP24830HS-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MP24830HS-LF-Z order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MP24830HS-LF-Z?

For technical support, including MP24830HS-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP24830HS-LF-Z requirements.

6.How does Aetrix verify that MP24830HS-LF-Z is sourced from the original manufacturer or authorized distributors?

All MP24830HS-LF-Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MP24830HS-LF-Z meets industry standards.

7.What is the process for return or replacement of MP24830HS-LF-Z?

All MP24830HS-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP24830HS-LF-Z, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MP24830HS-LF-Z part is unused and in its original packaging.

Return procedure for MP24830HS-LF-Z:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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