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Monolithic Power Systems Inc. MP4652ES-LF-Z
- Part No.:
- MP4652ES-LF-Z
- Manufacturer:
- Monolithic Power Systems Inc.
- Category:
- LED Drivers
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MP4652ES-LF-Z.pdf
- Description:
- IC LED DRIVER OFFL PWM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,061
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Product details
Overview
MP4652ES-LF-Z from Monolithic Power Systems is a high-performance off-line LED driver IC designed for isolated high-power backlighting in LCD TVs. It delivers two 180° phase-shifted gate drive signals (GL/GR), supports fixed or externally programmable frequency (25–150 kHz), integrates a 9V enhanced gate driver, and enables fast continuous PWM dimming with 1000:1 ratio and audible-noise elimination at 120 Hz - deployed in 2-stage LLC TV backlight systems.
For engineers reviewing the MP4652ES-LF-Z datasheet, MP4652ES-LF-Z pinout, MP4652ES-LF-Z application, or MP4652ES-LF-Z equivalent, key selection criteria include its dual-phase gate drive capability, 9V gate driver output, 1000:1 PWM dimming performance without audible noise, fault management with auto-recovery/latch-up options, and compatibility with LLC/half-bridge/flyback topologies.
Technical Context
The MP4652ES-LF-Z implements a dual-mode control architecture: it operates as a fixed-frequency PWM controller (via FSET resistor) for half-bridge/flyback, or as a frequency-modulated controller (via analog voltage on FSET) for LLC resonant stages. Its COMP pin interfaces with external compensation networks to regulate LED current via 0.6 V FB reference.
Fault protection is implemented through three independent comparators - OVP (2.38 V threshold, 7 µs delay), SSD (2.36 V, short-string detection), and FB (1.2 V, short-LED detection) - all feeding into a configurable FT timer that supports either auto-recovery (capacitor-based timing) or latch-up (resistor-biased).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 25 kHz to 150 kHz; set by resistor on FSET pin or analog voltage for LLC control - enables topology flexibility and EMI optimization. |
| Gate Driver Output | 9 V typical VCC supply with 1 A source / 2 A sink capability - directly drives external MOSFETs or gate-drive transformers without level-shifting. |
| PWM Dimming Ratio | 1000:1 at 120 Hz; achieved via continuous gate drive during PWM off-cycle - eliminates transformer/inductor audible noise in TV backlight systems. |
| Input Voltage Range | 9 V to 30 V VIN; supports wide-range auxiliary bias supply - powers internal circuitry and external control blocks reliably. |
| LED Current Regulation | 0.6 V FB reference with ±5% tolerance; regulated via external sample-hold or external amplifier - ensures stable current across temperature and line variations. |
| Fault Detection Thresholds | OVP: 2.38 V (7 µs delay); SSD: 2.36 V; FB short: 1.2 V - provides robust, multi-point protection against open/short LED string failures. |
| Dimming Interface | DC input (0–1.2 V) or direct PWM signal on PWMIN; synchronized burst dimming via SYNC pin - supports both legacy analog and modern digital brightness control schemes. |
Pinout & Package
MP4652ES-LF-Z is housed in a 16-pin SOIC package with exposed pad (SOIC16), rated for -20°C to +85°C ambient operation and optimized for surface-mount assembly in high-density LED driver PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 OVP | Over-voltage protection sense input | Monitors LED string output via voltage divider; triggers fault if >2.38 V for 7 µs - prevents overvoltage damage to LEDs and secondary components. |
| 2 SYNC | Burst frequency synchronization input | Accepts narrow-pulse sync signal (>1.4 V, >BFS-set frequency) to align DC-input PWM dimming bursts - enables system-level timing coordination. |
| 3 SSD | Short-string detection input | Detects LED string shorts-to-ground via secondary-side current sensing; fault triggered if voltage drops below 2.36 V for 7 µs. |
| 4 FB | LED current feedback input | Regulates average LED current to 0.6 V reference; also serves as short-LED detector (fault if >1.2 V for 7 µs) - dual-function analog interface. |
| 5 COMP | Error amplifier compensation node | Connects external RC network (47–470 nF for PWM topologies; 1 nF for LLC) - stabilizes current regulation loop and defines transient response. |
| 6 FT | Fault timer timing terminal | Capacitor sets auto-recovery delay; resistor <250 kΩ configures latch-up mode - provides flexible fault-handling strategy per system safety requirements. |
| 7 PWMOUT | PWM dimming driver output | Drives external dimming MOSFET gate; pulled low during fault - enables fast, low-loss series dimming of LED strings. |
| 8 FSET | Frequency set/control input | Resistor-to-GND sets fixed frequency (e.g., 25 kΩ → 50 kHz); analog voltage enables variable-frequency control for LLC - core topology selection pin. |
| 9 BFS | Burst frequency set for DC dimming | R-C network sets triangle waveform frequency for DC-input PWM dimming; pulled to VCC for direct PWM mode - dimming mode configuration pin. |
| 10 PWMIN | PWM dimming control input | 0–1.2 V DC input sets dimming duty cycle linearly; logic-level PWM input accepted directly - supports both analog and digital brightness interfaces. |
| 11 EN | Enable/disable control input | Logic-high (>2 V) enables IC; logic-low (<1 V) disables all outputs and reduces quiescent current to 1 µA - primary system power gating pin. |
| 12 VIN | Main supply input | 9–30 V input powering internal regulator and logic; bypassed with ≥0.1 µF ceramic capacitor - supplies bias for control circuitry. |
| 13 VCC | Internal LDO output & gate driver supply | 9.7 V ±10% regulated output; powers gate drivers and external circuits; bypassed with ≥1 µF ceramic capacitor - critical for driver strength and stability. |
| 14 GL | Phase-A gate driver output | 180° phase-shifted complementary signal to GR; drives high-side MOSFET or gate-transformer primary - enables balanced half-bridge/LLC switching. |
| 15 GND | Power and signal ground reference | Common return path for VIN, VCC, FB, COMP, and fault comparators - must be low-impedance and separated from power ground per layout guidelines. |
| 16 GR | Phase-B gate driver output | 180° phase-shifted complementary signal to GL; used with GL for push-pull or resonant stage drive - completes dual-phase output pair. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-phase gate driver outputs (GL/GR) | 180° phase-shifted, 9 V capable signals - enable efficient LLC, half-bridge, and flyback topologies without external phase-splitting circuitry. |
| Continuous PWM dimming with noise elimination | Maintains uninterrupted gate drive during PWM off-intervals - prevents magnetic component vibration and audible noise in TV backlight applications. |
| Configurable fault response (auto-recovery or latch-up) | FT pin accepts capacitor (auto-recovery) or resistor (<250 kΩ for latch-up) - meets diverse safety and reliability requirements across OEM designs. |
| Multi-point LED string protection | OVP, SSD, and FB pins provide independent open-circuit, short-to-ground, and short-string detection - comprehensive fault coverage for high-reliability displays. |
| Flexible dimming interface | Supports both DC voltage (0–1.2 V) and direct PWM input on PWMIN, plus SYNC-synchronized burst dimming - simplifies integration with MCU, DAC, or PWM generators. |
Applications
| LCD TV Backlighting | Commercial Display Lighting |
|---|---|
|
Use Scenario: Driving 4×55 V/260 mA LED strings in a 40-inch TV using a 2-stage LLC architecture with PFC front-end. IC Role / Device Role / Timing Role: Primary LLC controller providing dual-phase gate drive, current regulation via FB, and synchronized 320 Hz PWM dimming. Use Value: Enables 1000:1 dimming depth without audible noise, meeting broadcast-grade contrast and flicker requirements in premium television systems. |
Use Scenario: Powering high-brightness LED arrays in outdoor digital signage with thermal and ESD stress. IC Role / Device Role / Timing Role: Isolated LED driver managing constant-current output while monitoring string integrity via OVP/SSD/FB fault inputs. Use Value: Delivers field-reliable operation with latch-up fault handling and wide 9–30 V input range - suitable for unregulated 24 VDC industrial power rails. |
| Medical Imaging Displays | Professional Video Monitors |
|
Use Scenario: Backlighting diagnostic-grade LCD panels requiring precise luminance stability and zero flicker across clinical viewing angles. IC Role / Device Role / Timing Role: High-accuracy current regulator with 0.6 V FB reference and low-drift COMP compensation - maintains ±2% LED current over temperature. Use Value: Ensures consistent grayscale rendering and DICOM-compliant luminance uniformity, critical for radiological image interpretation. |
Use Scenario: Driving RGB LED backlights in color-accurate studio monitors with dynamic dimming zones. IC Role / Device Role / Timing Role: Dual-phase controller supporting independent dimming channels via PWMOUT and external MOSFETs - enables local dimming control. Use Value: Achieves >1000:1 contrast ratio with real-time dimming updates, preserving HDR metadata fidelity in broadcast production environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar off-line LED driver controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MP4651ES-LF-Z | Pin-to-pin compatible; lacks SYNC pin and has reduced dimming frequency range (up to 1 kHz vs. MP4652's 2 kHz). | Suitable for cost-sensitive TV models without system-level dimming synchronization requirements. | Select when SYNC functionality and >1 kHz dimming are not required; offers lower BOM cost and identical layout. |
| NCP13992DR2G | LLC-specific controller with integrated high-side driver; no dual-phase outputs or PWMOUT pin; requires external dimming circuitry. | Targeted at single-string, high-efficiency LLC designs where discrete dimming control is acceptable. | Choose for pure LLC optimization with higher integration; avoid when dual-phase drive or integrated PWM dimming is needed. |
Compared with MP4651ES-LF-Z, MP4652ES-LF-Z adds SYNC-based dimming synchronization and extended 2 kHz dimming support; versus NCP13992DR2G, it provides integrated dual-phase drive and direct PWMOUT dimming - making it uniquely suited for multi-string, noise-sensitive TV backlight systems.
Availability
MP4652ES-LF-Z is available at Aetrix Electronics and suitable for LCD TV backlighting, commercial display lighting, medical imaging displays, and professional video monitors requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MP4652ES-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.
The MP4652 belongs to MPS's high-power LED driver controller product line, engineered specifically for isolated, high-efficiency backlighting in large-format displays - emphasizing noise-free dimming, multi-topology flexibility, and robust fault management.
FAQ
What is the maximum recommended PWM dimming frequency for MP4652ES-LF-Z in half-bridge applications?
The MP4652ES-LF-Z supports PWM dimming frequencies greater than 2 kHz in half-bridge configurations, as confirmed in the datasheet's typical application diagram. This is enabled by its continuous gate drive architecture and fast PWMOUT response (3 mA source / 20 mA sink), ensuring minimal dead-time distortion and stable current regulation at high dimming rates.
How does the MP4652ES-LF-Z eliminate audible noise during PWM dimming?
It eliminates audible noise by maintaining continuous gate driver signals (GL/GR) throughout both PWM on- and off-intervals - preventing magnetic component (transformer/inductor) core saturation and mechanical vibration. This allows 1000:1 dimming at 120 Hz without perceptible noise, unlike conventional controllers that halt switching during dimming off-cycles.
Can MP4652ES-LF-Z drive external MOSFETs directly without a gate-drive transformer?
Yes - its 9 V VCC output and 1 A source / 2 A sink gate driver capability allow direct drive of medium-power MOSFETs (e.g., ≤500 V, Qg < 50 nC). For high-voltage isolation or high-side drive in bridge topologies, a gate-drive transformer is still recommended to ensure level-shifting and noise immunity.
What is the function of the SSD pin, and how is it connected in a typical LED string?
The SSD (Short String Detection) pin monitors secondary-side current via a resistor between the LED string cathode and ground. A voltage drop below 2.36 V for 7 µs triggers fault mode - indicating a short anywhere along the LED string to ground. It is typically connected through a 10–100 kΩ pull-up to VCC and a current-sense resistor to ground.
Does MP4652ES-LF-Z support both constant-current and constant-voltage LED regulation modes?
No - it is designed exclusively for constant-current LED regulation via the FB pin (0.6 V reference). The IC regulates average LED current using external sample-hold circuitry (for PWM topologies) or an external frequency-control loop (for LLC), with no built-in CV regulation capability or dedicated voltage feedback path.
How is fault recovery behavior configured on MP4652ES-LF-Z?
Fault recovery is configured via the FT pin: connecting a capacitor to GND enables auto-recovery after a timing delay (e.g., 10 nF ≈ 3 ms), while connecting a resistor <250 kΩ forces latch-up until EN is cycled. The datasheet specifies 8 µA charging current and 2.38 V threshold for capacitor-based timing.
Is MP4652ES-LF-Z compatible with LLC, flyback, and half-bridge topologies simultaneously in one design?
No - topology selection is determined by external circuit configuration: FSET resistor + COMP capacitor for PWM-controlled half-bridge/flyback; FSET voltage input + COMP 1 nF capacitor for LLC. A single design must commit to one topology; switching mid-design requires hardware changes to FSET, COMP, and feedback paths.
MP4652ES-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:
- AC DC Offline Switcher
- Topology:
- Half-Bridge
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 9V
- Voltage - Supply (Max):
- 30V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 50kHz
- Dimming:
- PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MP4652ES-LF-Z FAQ
1.How can I place an order for MP4652ES-LF-Z through Aetrix?
Please submit a Request for Quotation (RFQ) for MP4652ES-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 MP4652ES-LF-Z reliable?
The price and inventory of MP4652ES-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 MP4652ES-LF-Z is usually 5 days.
3.What payment methods are accepted for MP4652ES-LF-Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MP4652ES-LF-Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MP4652ES-LF-Z?
MP4652ES-LF-Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MP4652ES-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 MP4652ES-LF-Z?
For technical support, including MP4652ES-LF-Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MP4652ES-LF-Z requirements.
6.How does Aetrix verify that MP4652ES-LF-Z is sourced from the original manufacturer or authorized distributors?
All MP4652ES-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 MP4652ES-LF-Z meets industry standards.
7.What is the process for return or replacement of MP4652ES-LF-Z?
All MP4652ES-LF-Z units undergo pre-shipment inspection (PSI). If there is an issue with MP4652ES-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 MP4652ES-LF-Z part is unused and in its original packaging.
Return procedure for MP4652ES-LF-Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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