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Monolithic Power Systems Inc. MP4601EF-LF-P
- Part No.:
- MP4601EF-LF-P
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MP4601EF-LF-P.pdf
- Description:
- NRFND: FOR NEW DESIGNS, RECOMMEN
- Quantity:
- Payment:
- Shipping:
Inventory:4,429
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Product details
Overview
MP4601EF-LF-P from Monolithic Power Systems is a current-mode buck-boost white LED driver IC designed for large-size LCD TV backlighting, supporting up to 100 LEDs in series with output voltage up to 350V. It operates with dual input rails (VINL = 12V, VINH = up to 236V), delivers regulated LED current via 200mV FB reference, and achieves up to 99.5% efficiency using patented power leverage control. Its integrated 0.5Ω MOSFET switch enables high-power-density designs for 60-inch+ panels.
For engineers reviewing the MP4601EF-LF-P datasheet, MP4601EF-LF-P pinout, MP4601EF-LF-P application, or MP4601EF-LF-P equivalent, key selection criteria include its 1:1000+ dimming ratio (PWM + analog), programmable cycle-by-cycle overcurrent protection, thermal shutdown at 150°C, and dual-package availability (TSSOP16-EP/SOIC16) for thermal and layout flexibility.
Technical Context
The MP4601EF-LF-P implements peak current-mode control with programmable slope compensation (1.2 V/µs default) to ensure stability at duty cycles >50%. Its novel power leverage architecture regulates only a small portion of the total LED string voltage-leveraging a fixed high-voltage bus (VINH) while using a low-voltage controller (VINL)-reducing component stress and enabling compact magnetics.
It integrates fault detection logic for LED open (OV threshold = 1.2V, hysteresis = 0.1V), LED short (latch-off if FB > 600mV or >300mV for 480 µs), output short circuit, and thermal shutdown (150°C, 20°C hysteresis). The FAULT pin provides open-drain status signaling referenced to INGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck-boost regulator with internal 0.5Ω MOSFET switch - enables single-stage high-voltage LED driving without external high-side switch. |
| FB Reference Voltage | 200 mV ±5% - sets precise LED current via external sense resistor (e.g., 2Ω yields 100 mA). |
| Dimming Ratio | Over 1:1000 - achieved via combined PWM (100 Hz–50 kHz) and analog dimming (0.7–1.5 V on DIM pin). |
| Switching Frequency | 0.8–1.2 MHz (default 0.95 MHz) - supports small passive components and reduces EMI through synchronization capability. |
| Input Voltage Range | VINL: 4.5–75 V - powers control circuitry; VINH: up to 350 V - supplies LED string via external high-voltage rail. |
| Protection Features | LED open/short, output short, cycle-by-cycle OCP (programmable via ROCP), thermal shutdown (150°C), and FAULT pin latching - ensures robust field operation. |
| Quiescent Current | 850 µA typical - minimizes standby power loss; 10 µA in shutdown mode - supports energy-efficient system sleep states. |
Pinout & Package
MP4601EF-LF-P is available in TSSOP16-EP (exposed pad) and SOIC16 packages. The TSSOP16-EP variant offers superior thermal performance (θJA = 45°C/W) and is recommended for high-power TV backlight applications requiring sustained 2.7W dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Low-voltage input supply | Accepts 4.5–75 V DC for internal bias and gate drive; requires local decoupling capacitor. |
| INGND | Input ground reference | Reference node for EN, DIM, SYN signals; must be connected to system input ground plane. |
| DIM | Dimming control input | Accepts PWM (100 Hz–50 kHz) or analog voltage (0.7–1.5 V) to scale LED current from 0% to 100%. |
| FAULT | Fault status output | Open-drain output pulled low during LED short, open, or thermal fault; high-Z otherwise. |
| FB | Current-sense feedback | Regulates voltage across external sense resistor to 200 mV; triggers latch-off if >600 mV or >300 mV for 480 µs. |
| SW | Internal switch source | Connects to inductor and Schottky rectifier cathode; carries full LED current and switching transients. |
| BST | Bootstrap supply | Forms floating gate drive supply with external capacitor between BST and SW pins. |
| OCP | Overcurrent programming | Resistor-to-VSS sets cycle-by-cycle current limit (default 2.5 A); enables precise FET stress control. |
Key Features
| Feature | Design Value |
|---|---|
| Power leverage control | Enables 350 V LED string regulation using only 12 V controller supply - reduces MOSFET voltage stress and improves reliability. |
| Programmable slope compensation | Configurable via SLOPE pin resistor (20k–500kΩ) - prevents sub-harmonic oscillation in CCM operation above 50% duty cycle. |
| Combined dimming architecture | Simultaneous analog + PWM dimming on single DIM pin - achieves >1:1000 contrast ratio without external logic or timing circuits. |
| Thermal-enhanced packaging | TSSOP16-EP with exposed pad - delivers 2.7 W continuous power dissipation at +25°C ambient, critical for sustained TV backlight operation. |
| Integrated protection coordination | FAULt pin latches on LED short while maintaining independent OVP (1.2 V threshold) and thermal shutdown - enables fail-safe system-level fault handling. |
Applications
| Large-Screen LCD TV Backlighting | Commercial Digital Signage Panels |
|---|---|
Use Scenario: Driving 80–100 LED strings in edge-lit or direct-lit 65-inch+ LCD TVs with 240–350 V total string voltage. IC Role / Device Role / Timing Role: Primary LED current regulator and fault manager; synchronizes switching frequency across multiple channels via SYN pin. Use Value: Eliminates need for external high-voltage MOSFETs and reduces BOM count by 30% versus discrete buck-boost solutions. | Use Scenario: Powering high-brightness LED backlights in outdoor kiosks and retail displays operating 24/7 under variable ambient temperature. IC Role / Device Role / Timing Role: Constant-current driver with thermal shutdown and LED open/short detection - ensures uninterrupted operation and automatic recovery. Use Value: Maintains >95% efficiency across 180–236 V external bus range, minimizing heat buildup in sealed enclosures. |
| Medical Imaging Monitor Backlights | Industrial Control Panel Displays |
Use Scenario: Delivering flicker-free, color-accurate illumination for diagnostic-grade 55-inch medical monitors requiring DICOM-compliant luminance uniformity. IC Role / Device Role / Timing Role: Precision current source with ±5% FB reference and <1% current matching across parallel channels. Use Value: Supports analog dimming down to 0.7 V for fine-grained brightness control without PWM-induced image artifacts. | Use Scenario: Backlighting ruggedized HMI displays in factory automation systems exposed to vibration, dust, and wide temperature swings (−40°C to +85°C). IC Role / Device Role / Timing Role: Fault-tolerant LED driver with latch-off protection and FAULT pin reporting - enables predictive maintenance via PLC monitoring. Use Value: Withstands 10 µA shutdown current and −20°C to +85°C operating range, ensuring long-term reliability in uncontrolled environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4603 | Successor device with improved efficiency (up to 99.7%), lower quiescent current (650 µA), and extended VINL range (3.3–85 V); pin-compatible but requires updated layout for BST capacitor placement. | Targeted for new designs requiring higher reliability margin and RoHS-6 compliance; not backward-compatible with MP4601's thermal pad footprint. | Select MP4603 for production ramp after Q3 2023; MP4601EF-LF-P remains valid for legacy repair and inventory utilization. |
| LM3409HV | External MOSFET controller (no integrated switch); supports up to 75 V VIN, requires external 350 V-rated FET; lacks integrated analog dimming and FAULT pin latching. | Suitable for custom high-voltage architectures where layout flexibility outweighs integration benefits; demands additional gate driver and protection ICs. | Choose LM3409HV only when system-level voltage scaling or multi-rail redundancy is required beyond MP4601's dual-input architecture. |
Compared with MP4603, MP4601EF-LF-P offers proven field reliability and lower design risk for existing TV platforms, while LM3409HV provides greater topology freedom at the cost of increased component count and reduced dimming precision.
Availability
MP4601EF-LF-P is available at Aetrix Electronics and suitable for large-screen TV backlighting, commercial signage, medical imaging monitors, and industrial HMI displays requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP4601EF-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.
The MP4601 belongs to MPS's high-voltage LED driver product line, engineered specifically for energy-efficient, high-reliability backlighting in premium consumer and professional display systems.
FAQ
What is the maximum LED string voltage supported by MP4601EF-LF-P?
The MP4601EF-LF-P supports LED string voltages up to 350 V when used with an external high-voltage bus (VINH). Its buck-boost architecture regulates current without requiring the IC itself to withstand the full string voltage-only the external components (inductor, diode, capacitor) must be rated accordingly.
Can MP4601EF-LF-P operate with only a single 12 V supply?
No. MP4601EF-LF-P requires two independent supplies: VINL (4.5–75 V, typically 12 V) powers the IC's internal circuitry and gate driver, while VINH (external high-voltage rail, up to 350 V) supplies the LED string. The IC leverages VINH via its power leverage topology-it does not generate VINH internally.
How is the 1:1000+ dimming ratio achieved?
The ratio combines digital PWM dimming (100 Hz–50 kHz, off-time blanking of COMP node) and analog dimming (0.7–1.5 V on DIM pin modulating FB reference from 0 to 200 mV). When used together-e.g., 100 Hz PWM with 0.7–1.5 V amplitude-the multiplicative effect exceeds 1:1000 without external controllers.
What happens during an LED short-circuit fault?
If FB voltage exceeds 600 mV, or stays above 300 mV for 480 µs, the IC latches off: DGD is pulled low, SW turns off, and FAULT pin is driven to INGND. Recovery requires cycling EN or resetting the supply-no auto-restart to prevent repeated stress on failed LEDs.
Is MP4601EF-LF-P pin-compatible with MP4603?
MP4603 is functionally and pin-compatible with MP4601EF-LF-P in SOIC16 and TSSOP16-EP packages, but differs in BST capacitor placement requirements and thermal pad layout. Migration requires minor PCB revision; electrical behavior is upward-compatible with tighter tolerances and lower IQ.
What package variants are offered for MP4601EF-LF-P?
MP4601EF-LF-P denotes the RoHS-compliant, tape-and-reel packaged TSSOP16-EP variant with exposed thermal pad. The SOIC16 version is designated MP4601ES-LF-Z. Both share identical electrical specifications but differ in thermal resistance (θJA = 45°C/W vs. 80°C/W) and power dissipation capability (2.7 W vs. 1.6 W).
MP4601EF-LF-P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- MP
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 75V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 200kHz ~ 1.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP-EP
MP4601EF-LF-P FAQ
1.How can I place an order for MP4601EF-LF-P through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4601EF-LF-P 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 MP4601EF-LF-P reliable?
The price and inventory of MP4601EF-LF-P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MP4601EF-LF-P is usually 5 days.
3.What payment methods are accepted for MP4601EF-LF-P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4601EF-LF-P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4601EF-LF-P?
MP4601EF-LF-P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4601EF-LF-P 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 MP4601EF-LF-P?
For technical support, including MP4601EF-LF-P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4601EF-LF-P requirements.
6.How does Aetrix verify that MP4601EF-LF-P is sourced from the original manufacturer or authorized distributors?
All MP4601EF-LF-P 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 MP4601EF-LF-P meets industry standards.
7.What is the process for return or replacement of MP4601EF-LF-P?
All MP4601EF-LF-P units undergo pre-shipment inspection (PSI). If there is an issue with MP4601EF-LF-P, 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 MP4601EF-LF-P part is unused and in its original packaging.
Return procedure for MP4601EF-LF-P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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