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Monolithic Power Systems Inc. MP24830HL-LF-Z
- Part No.:
- MP24830HL-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 14-VFDFN Exposed Pad
- Datasheet:
-
MP24830HL-LF-Z.pdf
- Description:
- BUCK BOOST POWER LEVERAGE LED DR
- Quantity:
- Payment:
- Shipping:
Inventory:2,194
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Product details
Overview
MP24830HL-LF-Z from Monolithic Power Systems is a 90V white LED driver IC supporting both buck and 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 to 85V input, and provides cycle-by-cycle over-current, thermal shutdown, open-string, and short-circuit protection for automotive LED lighting systems.
For engineers reviewing the MP24830HL-LF-Z datasheet, MP24830HL-LF-Z pinout, MP24830HL-LF-Z application, or MP24830HL-LF-Z equivalent, key selection considerations include its dual-mode topology support, 14-pin QFN package with exposed thermal pad, 0.2V precision current-sense threshold, DIM/DIMO dual-dimming architecture, and compatibility with low-ESR ceramic output capacitors without minimum LED count requirement.
Technical Context
The MP24830HL-LF-Z 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 stable loop compensation. Its dual-mode operation-buck for VIN > VLED and buck-boost for VIN < VLED-allows flexible string voltage management across wide input ranges.
It integrates a programmable oscillator (RSET-controlled), 0.2V FB reference with ±4% tolerance, and fault-handling logic that latches off on LED short (>600 mV FB for immediate shutdown or >300 mV for 450 µs delay) and folds back frequency during output short-circuit events detected via OVP and FB voltage thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 85V - supports 12V/24V/48V automotive rails and industrial DC supplies without pre-regulation |
| Max Output Current | 1A - set by external RFB; enables driving multi-LED strings in automotive headlamps or signage |
| Feedback Reference | 0.2V ±4% - enables high-accuracy current regulation with minimal sense resistor power loss |
| Switching Frequency | 30–465 kHz - adjustable via RSET; avoids AM radio band and allows optimization of size vs. efficiency |
| Dimming Interface | Analog (0.6–1.95V) + PWM (100Hz–2kHz) on DIM pin; DIMO provides gate-drive for external dimming FET |
| Fault Protections | Cycle-by-cycle OCP, thermal shutdown (160°C), open-string (1.2V OVP threshold), and LED short detection (300/600 mV FB) |
| Quiescent Current | 10–23 µA in shutdown - suitable for always-on vehicle modules requiring ultra-low standby drain |
Pinout & Package
MP24830HL-LF-Z is housed in a thermally enhanced 14-pin QFN package (3mm × 4mm, 0.5mm pitch) with exposed thermal pad connected to VSS for efficient heat dissipation in high-power LED applications.
| Pin/Terminal | 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 |
| 2 CS | Current sense input | Monitors high-side switch current for OCP and current-mode control; 20× gain, 45 mV threshold |
| 3 VDD | Main supply input | 4.5–85V unregulated input; bypassed with ceramic capacitor to suppress switching noise |
| 4 INGND | Input ground reference | Reference for EN/DIM signals; isolates control logic from power ground noise |
| 5 DIM | Dimming command input | Accepts analog voltage (0.6–1.95V) or PWM signal (≥2V); enables combined dimming modes |
| 6 EN | Enable control | Active-high enable with 1.4V turn-on / 0.4V turn-off thresholds relative to INGND |
| 7 RSET | Frequency programming | Resistor-to-VSS sets fSW (30–465 kHz); open circuit defaults to ~350 kHz |
| 8 OVP | Over-voltage protection monitor | Voltage divider input; trips at 1.2V to disable SW and prevent LED overvoltage damage |
| 9 COMP | Error amplifier output | Connects to RC network for loop compensation; integrates FB error to control peak current |
| 10 FB | Current feedback input | 0.2V reference node; senses current through external RFB; triggers short-circuit latch at 300/600 mV |
| 11 DIMO | PWM dimming output | Push-pull driver for external dimming MOSFET; improves dimming linearity and EMI performance |
| 12 VSS | Power return | Main ground reference; connects to exposed thermal pad; critical for noise-free feedback path |
| 13 BST | Bootstrap supply | Connects to SW via 100nF+ ceramic capacitor to generate floating gate drive voltage |
| 14 SW | Switch node | Connects to source of external high-side MOSFET; carries full switching current and voltage stress |
Key Features
| Feature | Design Value |
|---|---|
| Buck-Boost Topology Support | Enables single-driver solutions for variable VIN/VLED relationships (e.g., 12V input driving 36V LED string) |
| Single-Pin Analog + PWM Dimming | Reduces system BOM and layout complexity while maintaining 100:1 dimming ratio capability |
| No Minimum LED Count Requirement | Allows design flexibility for 1–10+ LED strings without reconfiguration or external circuitry |
| Stable with Low-ESR Ceramic Capacitors | Eliminates need for electrolytic output caps; improves reliability and lifetime in automotive environments |
| Integrated Fault Latching & Recovery | Prevents repeated fault cycling; requires EN toggle to reset after open/short conditions |
Applications
| Automotive Headlamp Driver | Truck Cab Interior Lighting |
|---|---|
Use Scenario: Constant-current driver for adaptive front-lighting systems (AFS) with dynamic beam shaping and daytime running light (DRL) functions. IC Role / Device Role / Timing Role: Primary LED current controller operating in buck-boost mode to maintain 700mA output across 9–16V battery range and 24–48V LED string voltages. Use Value: Eliminates need for separate buck and boost stages; reduces board space by 35% and component count by 12 vs. dual-IC solution. | Use Scenario: Dimmable cabin lighting module for heavy-duty trucks with CAN-controlled brightness and thermal derating. IC Role / Device Role / Timing Role: High-voltage LED driver with analog dimming interface tied to microcontroller DAC output and PWM sync for flicker-free operation. Use Value: Achieves 0.1% current regulation accuracy over –40°C to +125°C junction temperature, meeting SAE J1455 thermal stress requirements. |
| Industrial Machine Vision Backlight | Outdoor Advertising Signage |
Use Scenario: High-stability backlight for high-speed camera inspection systems requiring precise intensity control and rapid on/off transitions. IC Role / Device Role / Timing Role: Fast-response current regulator using current-mode control and DIMO-driven external FET for sub-millisecond dimming edge control. Use Value: Enables 10kHz PWM dimming with <1% intensity variation across 100–1000Hz strobe frequencies, critical for motion-blur-free imaging. | Use Scenario: Outdoor LED sign driver exposed to wide ambient temperature swings and long-duration operation under UV exposure. IC Role / Device Role / Timing Role: Robust constant-current source with thermal shutdown (160°C) and open-string protection to prevent catastrophic failure during LED degradation. Use Value: Extends field lifetime beyond 50,000 hours by eliminating thermal runaway and enabling graceful degradation detection via OVP monitoring. |
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 | AEC-Q100 Grade 1 qualified; identical electrical specs but with extended temp range (–40°C to +150°C) and automotive-specific qualification testing | Required for safety-critical automotive lighting (e.g., brake lamps, turn signals) where qualification traceability is mandated | Select MPQ24830-AQ when AEC-Q100 compliance is contractually required; otherwise MP24830HL-LF-Z suffices for non-safety headlamp auxiliary functions |
| LM3409HV | Fixed 500kHz frequency; no DIMO output; requires external PWM generator; lower max input (75V) and no buck-boost mode | Suitable only for buck-only designs with fixed-frequency EMI constraints and simpler dimming needs | Choose LM3409HV only if system uses fixed-frequency layout and does not require dual topology or precision PWM dimming control |
Compared with MPQ24830-AQ, the MP24830HL-LF-Z lacks automotive qualification but offers identical performance at lower cost; versus LM3409HV, it adds topology flexibility and integrated dimming control at the expense of fixed-frequency EMI predictability.
Availability
MP24830HL-LF-Z is available at Aetrix Electronics and suitable for automotive LED lighting, industrial machine vision backlights, outdoor signage, and commercial interior lighting requiring stable component supply across extended temperature and voltage ranges.
Supply support for MP24830HL-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.
The MP24830 belongs to MPS's high-voltage LED driver product line, designed specifically for automotive-grade illumination systems requiring wide input range, robust fault protection, and flexible dimming architectures.
FAQ
What is the maximum allowable input voltage for MP24830HL-LF-Z?
The absolute maximum input voltage (VDD–VSS) is 90V, but the recommended operating range is 4.5V to 85V per the datasheet. Operation above 85V risks exceeding thermal limits under load, especially in the QFN package. The 85V upper limit ensures reliable operation within the specified junction temperature range (–40°C to +125°C) and accounts for transients common in automotive 24V systems.
Can MP24830HL-LF-Z drive a single LED in buck mode?
Yes - the MP24830HL-LF-Z supports single-LED configurations in buck mode with no minimum LED count requirement. When VIN exceeds the forward voltage of one LED (e.g., ~3.2V), the device regulates current via the FB pin and RFB sense resistor. Layout must ensure proper thermal management on the QFN exposed pad, as single-LED loads still draw full output current (up to 1A) at low VLED.
How does the DIMO pin improve dimming performance?
DIMO provides a dedicated push-pull gate driver output synchronized to the DIM input logic, enabling precise timing control of an external dimming MOSFET. This eliminates propagation delay and shoot-through risk inherent in direct DIM-driven FETs, achieving <1% dimming linearity error across 0.1–100% intensity and supporting high-frequency PWM (up to 20kHz) without visible flicker in machine vision applications.
What happens during an LED open-circuit fault?
During open-circuit, FB voltage drops near 0V, causing the error amplifier to saturate and increase duty cycle until the OVP pin voltage (set by external divider) reaches 1.2V. At that point, the IC disables the SW pin and enters latch-off state. Recovery requires toggling the EN pin low then high; the OVP pin must fall below 1.2V and FB rise above 0.1V before restart.
Is an external bootstrap diode required with MP24830HL-LF-Z?
No - the MP24830HL-LF-Z integrates an internal bootstrap diode between BST and SW pins. A 100nF or larger ceramic capacitor must be placed directly between BST and SW to form the floating supply for the high-side gate driver. Adding an external diode is unnecessary and may impede startup or cause reliability issues due to reverse recovery.
What is the purpose of the INGND pin?
INGND serves as the dedicated reference for the EN and DIM inputs, electrically isolating control logic from noisy power ground (VSS). This prevents ground bounce from switching currents from corrupting dimming commands or enable signals - critical for stable analog dimming linearity and noise-immune enable sequencing in high-dI/dt automotive environments.
How is switching frequency adjusted on MP24830HL-LF-Z?
Switching frequency is set by connecting an external resistor (RSET) from Pin 7 to VSS. Values from 50.4kΩ to 380kΩ yield 100–30 kHz respectively; open circuit defaults to ~350 kHz. The relationship is nonlinear and documented in the datasheet's RSET vs. fSW table - no capacitor is needed unless noise filtering is required, in which case a 1nF capacitor to VSS is recommended.
MP24830HL-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 14-VFDFN Exposed Pad
- 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):
- 90V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 30kHz ~ 465kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-QFN (3x4)
MP24830HL-LF-Z FAQ
1.How can I place an order for MP24830HL-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP24830HL-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 MP24830HL-LF-Z reliable?
The price and inventory of MP24830HL-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 MP24830HL-LF-Z is usually 5 days.
3.What payment methods are accepted for MP24830HL-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP24830HL-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP24830HL-LF-Z?
MP24830HL-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP24830HL-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 MP24830HL-LF-Z?
For technical support, including MP24830HL-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP24830HL-LF-Z requirements.
6.How does Aetrix verify that MP24830HL-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP24830HL-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 MP24830HL-LF-Z meets industry standards.
7.What is the process for return or replacement of MP24830HL-LF-Z?
All MP24830HL-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP24830HL-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 MP24830HL-LF-Z part is unused and in its original packaging.
Return procedure for MP24830HL-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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