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Monolithic Power Systems Inc. MP4601ES-LF-Z
- Part No.:
- MP4601ES-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP4601ES-LF-Z.pdf
- Description:
- IC LED DRV RGLTR PWM 2.5A 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,612
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Product details
Overview
MP4601ES-LF-Z 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 VINH+63V (VINH ≤ 350V), integrated 0.5Ω internal MOSFET, ±5% 200mV reference voltage, and over 1:1000 dimming ratio via PWM + analog control.
For engineers reviewing the MP4601ES-LF-Z datasheet, MP4601ES-LF-Z pinout, MP4601ES-LF-Z application, or MP4601ES-LF-Z equivalent, key selection considerations include its dual-voltage operation (VINL=12V + external high-voltage bus), programmable cycle-by-cycle overcurrent protection, fault-latched LED short detection, thermal shutdown at 150°C, and TSSOP16-EP/SOIC16 package compatibility.
Technical Context
The MP4601ES-LF-Z implements peak-current-mode buck-boost regulation with novel power leverage control, enabling high-efficiency (>99.5%) operation by regulating only a small portion of the total LED string voltage while leveraging a fixed high-voltage source. Its architecture supports synchronized switching frequency (0.1–2 MHz) and fold-back frequency reduction under OVP/FB fault conditions.
It integrates analog and PWM dimming control on a single DIM pin, where 0.7–1.5V analog input linearly scales the 200mV FB reference from 0% to 100% LED current, while 100Hz–50kHz PWM signals enable digital dimming. Fault handling includes immediate latch-off for FB > 600mV, 480µs delay for 300mV < FB < 600mV, and open-drain FAULT output referenced to INGND.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | Buck-boost regulator with integrated 0.5Ω MOSFET - enables compact, high-power-density LED driver design without external high-voltage switch. |
| LED String Voltage Range | VINH to VINH+63V - supports up to 350V LED strings when paired with external high-voltage bus, suitable for 60-inch+ LCD TVs. |
| Dimming Ratio | >1:1000 - achieved via combined PWM + analog dimming, critical for high-contrast HDR TV backlight control. |
| Reference Voltage | ±5% 200mV at FB pin - sets LED current accuracy; external RFB determines ILED = 0.200V / RFB. |
| Switching Frequency | 0.8–1.2 MHz (default 0.95 MHz) - allows small passive components; synchronizable via SYN pin to avoid beat frequencies in multi-channel systems. |
| Protection Features | LED open/short detection, cycle-by-cycle OCP (programmable via ROCP), thermal shutdown (150°C), and latch-off FAULT output - ensures robust operation in high-reliability TV power stages. |
| Quiescent Current | 850 µA typical - minimizes standby power loss; drops to 10 µA in shutdown mode for energy-efficient system design. |
Pinout & Package
MP4601ES-LF-Z is available in SOIC16 package (10.0 mm × 3.9 mm × 1.75 mm) with exposed pad not present; thermal resistance θJA = 80°C/W. Pin functions are identical between SOIC16 and TSSOP16-EP variants per datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Low-voltage input supply | Accepts 4.5–75V DC (typically 12V); powers internal circuitry and bootstrap capacitor via BST-SW path. |
| INGND | Input ground reference | Reference for EN, DIM, SYN signals; separate from VSS to isolate noise-sensitive analog feedback paths. |
| FB | Current-sense feedback input | Regulates voltage across external sense resistor to 200mV; triggers LED short protection if >600mV or >300mV for 480µs. |
| DIM | Dimming control input | Accepts 0.7–1.5V analog signal or 100Hz–50kHz PWM; controls LED current scaling and enables >1:1000 dimming ratio. |
| FAULT | Fault status output | Open-drain output pulled low to INGND during LED short or latch-off condition; requires external pull-up for system-level fault reporting. |
| SW | Internal switch node | Drives external inductor; connects to cathode of Schottky rectifier; voltage swings from VIN to VIN+63V during operation. |
| BST | Bootstrap supply | Connects via capacitor to SW to generate floating gate drive for internal high-side MOSFET; enables efficient buck-boost switching. |
Key Features
| Feature | Design Value |
|---|---|
| Novel power leverage control | Enables use of low-voltage (12V) IC to drive 350V LED strings by regulating only a fraction of total string voltage - reduces component stress and cost. |
| Programmable cycle-by-cycle OCP | ROCP resistor sets current limit from 1.1A to 4.1A - allows precise matching to LED string current and inductor saturation limits. |
| Slope compensation via SLOPE pin | RSLOPE resistor configures compensation slope (0.3–0.47 V/µs) - ensures stable peak-current-mode operation above 50% duty cycle. |
| Integrated 0.5Ω MOSFET | Eliminates need for external high-voltage switch - simplifies layout, reduces BOM count, and improves thermal performance in space-constrained TV backlights. |
| Thermal shutdown with 20°C hysteresis | Shuts down at 150°C junction temperature and resumes after cooling to 130°C - prevents permanent damage during transient overloads or poor heatsinking. |
Applications
| Large-Screen LCD TV Backlighting | Commercial Digital Signage Panels |
|---|---|
Use Scenario: Driving 80–100 LED strings in parallel for 75-inch 4K UHD television backlight units with local dimming zones. IC Role / Device Role / Timing Role: Primary LED current regulator and dimming controller; manages high-voltage string compliance while coordinating PWM timing with system video processor. Use Value: Enables >99.5% efficiency at 240V LED string voltage and 100mA per string, reducing thermal load and enabling thinner TV chassis designs. | Use Scenario: Powering edge-lit LED arrays in 55-inch retail kiosks requiring flicker-free, 24/7 operation under variable ambient lighting. IC Role / Device Role / Timing Role: Constant-current LED driver with analog dimming interface for smooth brightness transitions; FAULT pin feeds into system health monitoring MCU. Use Value: 10µA shutdown current and thermal hysteresis ensure reliability during unattended operation; SOIC16 package supports automated optical inspection (AOI) in high-volume manufacturing. |
| Medical Imaging Display Backlights | Industrial Control Panel Lighting |
Use Scenario: High-stability backlight for diagnostic-grade 3MP medical monitors where luminance uniformity and color fidelity are critical. IC Role / Device Role / Timing Role: Precision current source with ±5% FB reference tolerance; synchronized switching prevents EMI interference with sensitive analog front-end circuits. Use Value: 0.5Ω RDS(ON) and 850µA quiescent current minimize self-heating drift, maintaining consistent LED output over extended clinical shifts. | Use Scenario: Ruggedized HMI backlighting in factory automation panels exposed to vibration, wide temperature swings, and ESD events. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with latch-off protection for LED short/open conditions; FAULT output triggers PLC alarm logic. Use Value: LED open auto-recovery and 150°C thermal shutdown prevent field failures; SOIC16 package withstands reflow and mechanical stress better than TSSOP variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar white LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4603ES-LF-Z | Successor device with improved efficiency (up to 99.7%), lower quiescent current (750µA), and enhanced ESD rating (±4kV HBM). | Same pinout and footprint; supports identical VINH+63V output range but optimized for newer TV platforms with tighter thermal budgets. | Select MP4603 for new designs requiring longer product lifecycle support and higher reliability certification. |
| LM3409HVMM/NOPB | External MOSFET controller (no integrated switch); supports up to 75V VIN, requires external high-side FET for >350V LED strings. | Greater flexibility in high-voltage FET selection but increases BOM count, layout complexity, and thermal management burden. | Choose LM3409HV when system requires >350V LED string voltage beyond MP4601's VINH+63V limit or discrete FET optimization. |
Compared with MP4601ES-LF-Z, MP4603ES-LF-Z offers measurable improvements in efficiency and ESD robustness while maintaining full pin compatibility, whereas LM3409HVMM/NOPB trades integration for higher voltage scalability at the cost of added design effort and component count.
Availability
MP4601ES-LF-Z is available at Aetrix Electronics and suitable for large-screen TV backlighting, commercial signage, medical imaging displays, and industrial HMI applications requiring stable component supply, long-term availability, and RoHS-compliant packaging.
Supply support for MP4601ES-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 mixed-signal ICs for power management, LED lighting, and motor control.
The MP4601 belongs to MPS's high-voltage LED driver product line, engineered specifically for cost-sensitive, high-efficiency backlight solutions in consumer and professional large-panel displays.
FAQ
What is the maximum LED string voltage supported by MP4601ES-LF-Z?
The MP4601ES-LF-Z supports output voltage up to VINH+63V, where VINH is an external high-voltage bus. With VINH ≤ 350V, the device can drive LED strings up to 350V - sufficient for 60-inch or larger LCD TV backlights with up to 100 series-connected LEDs. The internal 0.5Ω MOSFET handles switching, eliminating need for external high-voltage switches.
How does MP4601ES-LF-Z achieve over 1:1000 dimming ratio?
It combines PWM dimming (100Hz–50kHz) with analog dimming (0.7–1.5V on DIM pin) to scale the 200mV FB reference from 0% to 100% LED current. During PWM off-cycles, an internal switch holds COMP voltage, preserving regulation state and enabling fast current recovery - essential for deep dimming without flicker in HDR TV applications.
What protection features does MP4601ES-LF-Z include for LED string faults?
The device provides LED open detection (via OVP threshold), immediate latch-off for FB > 600mV, and delayed latch-off (480µs) for 300mV < FB < 600mV. It also includes cycle-by-cycle overcurrent protection (programmable via ROCP), thermal shutdown at 150°C with 20°C hysteresis, and open-drain FAULT output pulled low during fault conditions.
Can MP4601ES-LF-Z operate with only a 12V supply, or does it require two input voltages?
MP4601ES-LF-Z requires two supplies: a low-voltage input (VINL = 4.5–75V, typically 12V) for IC bias and gate drive, plus an external high-voltage bus (VINH) applied to the LED string anode. This dual-rail architecture enables high-efficiency power leverage - the IC regulates only a small portion of the total LED string voltage, reducing losses and component stress.
Is MP4601ES-LF-Z still recommended for new designs?
No - the datasheet explicitly states "NOT RECOMMENDED FOR NEW DESIGNS REFER TO MP4603". MP4603ES-LF-Z is the direct pin-compatible successor with improved efficiency (99.7%), lower quiescent current (750µA), and enhanced ESD rating (±4kV HBM). MP4601 remains available for legacy repair and continuity, but MP4603 is preferred for all new projects.
What package options are available for MP4601ES-LF-Z?
MP4601ES-LF-Z uses the SOIC16 package (10.0 mm × 3.9 mm × 1.75 mm), RoHS-compliant and lead-free. The "ES" suffix denotes SOIC16; the "LF-Z" suffix indicates lead-free, tape-and-reel packaging. An alternative TSSOP16-EP variant (MP4601EF-LF-Z) is also offered with better thermal performance (θJA = 45°C/W) due to exposed pad.
MP4601ES-LF-Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Monolithic Power Systems Inc.
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- 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:
- 2.5A (Switch)
- Frequency:
- 280kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MP4601ES-LF-Z FAQ
1.How can I place an order for MP4601ES-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4601ES-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 MP4601ES-LF-Z reliable?
The price and inventory of MP4601ES-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 MP4601ES-LF-Z is usually 5 days.
3.What payment methods are accepted for MP4601ES-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4601ES-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4601ES-LF-Z?
MP4601ES-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4601ES-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 MP4601ES-LF-Z?
For technical support, including MP4601ES-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4601ES-LF-Z requirements.
6.How does Aetrix verify that MP4601ES-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP4601ES-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 MP4601ES-LF-Z meets industry standards.
7.What is the process for return or replacement of MP4601ES-LF-Z?
All MP4601ES-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4601ES-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 MP4601ES-LF-Z part is unused and in its original packaging.
Return procedure for MP4601ES-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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