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Microchip Technology MSL2166-DUR
- Part No.:
- MSL2166-DUR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSL2166-DUR.pdf
- Description:
- IC LED DRIVER LINEAR PWM 64TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
MSL2166-DUR from Microchip Technology (formerly Atmel) is a 16-string, high-efficiency LED driver IC for LCD TV backlighting with advanced dimming modes. It sinks up to 350mA per string with ±0.8% current matching, supports frame-by-frame intensity control via 20MHz SPI, and features forward/center/reverse/inverse PWM modes synchronized to VSYNC/HSYNC for motion blur reduction. It drives external MOSFETs and adapts DC-DC or AC-DC converters using three Efficiency Optimizer outputs (FBO1–FBO2 + FBI).
For engineers reviewing the MSL2166-DUR datasheet, MSL2166-DUR pinout, MSL2166-DUR application, or MSL2166-DUR equivalent, key selection considerations include its 64-pin TQFN package, 2-FBO + 1-FBI interface configuration, string-level fault detection (open/short-circuit), on-chip EEPROM for power-up defaults, and support for cascaded area dimming in large-panel LCD TVs.
Technical Context
The MSL2166-DUR implements a distributed LED current regulation architecture using external N-channel MOSFETs, with each string controlled via dedicated gate drive (G0–G15), drain sense (D0–D15), and source/current sense (S0–S15) terminals. Its adaptive power supply control uses two FBO outputs and one FBI input to manage up to three independent LED power supplies.
Its timing engine synchronizes 12-bit per-string PWM dimming to video signals via PHI (VSYNC-derived) and GSC (HSYNC-derived) inputs, supporting phase-shifted outputs with programmable 1/16-cycle delays per string. The integrated 20MHz SPI interface enables broadcast writes and fault status readback across up to eight daisy-chained devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Strings | 16 parallel strings, each driven by external MOSFETs with independent current and PWM control |
| Max String Current | 350mA per string, regulated via external sense resistor (500mV full-scale) |
| Current Matching | ±0.8% string-to-string accuracy ensures uniform brightness and white point stability |
| PWM Resolution | 12-bit global + 12-bit per-string dimming control with four selectable modes (forward/center/reverse/inverse) |
| SPI Interface | 20MHz serial interface supporting up to 8 devices per bus with broadcast write capability |
| Fault Detection | Dedicated open-circuit, short-circuit, loss-of-sync, and over-temperature monitoring per string with FLTB output |
| Power Supply Control | 2 FBO outputs + 1 FBI input for adaptive feedback control of up to three LED power supplies |
| Operating Temp | −40°C to +85°C industrial temperature range suitable for enclosed TV backlight modules |
Pinout & Package
MSL2166-DUR is housed in a 9 mm × 9 mm × 0.85 mm, 64-pin TQFN package with exposed thermal pad (EP). Pin pitch is 0.5 mm. The package supports high-power dissipation required for multi-string LED driving in compact TV backlight designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| G0–G15 | Gate Drive Outputs | Drive gates of external N-MOSFETs per LED string; logic-level outputs compatible with standard MOSFETs |
| S0–S15 | Source/Current Sense Inputs | Connect to MOSFET source and current sense resistor; 500mV threshold sets full-scale LED current |
| D0–D15 | Drain Sense Inputs | Monitor MOSFET drain voltage via 10MΩ resistor for open-circuit fault detection |
| FBO1, FBO2 | Efficiency Optimizer Outputs | Analog feedback outputs to regulate first and second LED power supplies' feedback nodes |
| FBIN1 | Efficiency Optimizer Input | Accepts FBO1 signal from upstream device in daisy-chain for coordinated multi-supply control |
| PHI, GSC, PWM | Timing Inputs | PHI = VSYNC sync reference; GSC = HSYNC clock; PWM = external dimming signal (≤5kHz) |
| FLTB | Fault Output | Open-drain active-low signal asserting on any detected fault; cleared only after register read |
| EN, VIN, VCC, VDD | Power & Enable | VIN = 12V ±10% input; VCC = internal 5V LDO; VDD = internal 2.5V LDO; EN = hardware enable |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Power Correction | 8-bit correction algorithm maximizes efficiency across varying LED forward voltages and temperatures |
| Phase-Shifted PWM Dimming | Programmable 1/16-cycle delay per string reduces peak input capacitor current and EMI |
| Video-Synchronized Dimming | PWM timing locked to VSYNC/HSYNC with frequency multipliers (1×–32×) for precise frame alignment |
| EEPROM Configuration Storage | On-chip EEPROM retains register defaults (e.g., string enables, fault masks, PWM settings) across power cycles |
| Cascadable Architecture | Up to 8 devices share single SPI bus with unique ADDR setting; supports >128 LED strings in large displays |
| Per-String Fault Isolation | Independent enable/disable and fault reporting per string prevents single-point failure from disabling entire backlight |
Applications
| Television Backlighting | Medical Imaging Displays |
|---|---|
Use Scenario: High-dynamic-range (HDR) LCD TV with local dimming zones across 16+ vertical LED columns. IC Role / Device Role / Timing Role: MSL2166-DUR acts as string-level current regulator and synchronized PWM controller, receiving VSYNC/GSC from video processor and driving MOSFETs per zone. Use Value: Enables frame-accurate, phase-shifted dimming that reduces motion blur and waterfall artifacts while maintaining color fidelity across zones. | Use Scenario: Diagnostic monitor requiring flicker-free, stable luminance and long-term calibration retention. IC Role / Device Role / Timing Role: MSL2166-DUR provides closed-loop current regulation per LED string and stores calibrated dimming parameters in EEPROM for consistent startup behavior. Use Value: ±0.8% current matching and on-chip fault logging ensure uniform brightness and traceable operational history for regulatory compliance. |
| Industrial Panel Displays | Architectural Lighting Control |
Use Scenario: Ruggedized HMI display operating in wide temperature ranges (-40°C to +85°C) with variable ambient light conditions. IC Role / Device Role / Timing Role: MSL2166-DUR serves as intelligent LED driver with thermal shutdown, open/short detection, and SPI-configurable dimming profiles. Use Value: Over-temperature protection and robust fault handling prevent field failures in unventilated enclosures without external supervision. | Use Scenario: Large-format signage with segmented LED arrays requiring synchronized dimming across multiple driver units. IC Role / Device Role / Timing Role: MSL2166-DUR operates in daisy-chained configuration, accepting broadcast SPI commands and coordinating PWM timing across all units via shared PHI/GSC. Use Value: Eliminates need for separate timing distribution circuitry and enables unified brightness/phase control across physically distributed panels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED string driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSL2164-DUR | 3 FBO outputs, no FBI input; lacks daisy-chain feedback coordination capability | Better suited for single-power-supply systems without cascaded supply optimization | Select MSL2164-DUR when only one or two LED power rails are used and inter-device feedback is unnecessary |
| TLC6983RTQR | 16-channel constant-current sink with integrated MOSFETs; no external FET support; max 120mA/channel | Targeted at lower-power signage and indicator applications, not high-current TV backlights | Choose TLC6983RTQR only for space-constrained designs where external MOSFET routing is impractical and current demand ≤120mA |
Compared with MSL2164-DUR, MSL2166-DUR adds FBI input for coordinated multi-supply feedback in daisy-chained configurations, enabling tighter efficiency optimization across complex backlight topologies; versus TLC6983RTQR, it trades integrated FETs for higher current scalability (350mA vs. 120mA) and external thermal management flexibility.
Availability
MSL2166-DUR is available at Aetrix Electronics and suitable for LCD television backlighting, medical imaging displays, and industrial panel interfaces requiring stable component supply, long-lifecycle support, and verified thermal performance in compact TQFN packages.
Supply support for MSL2166-DUR 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
Microchip Technology acquired Atmel in 2016 and maintains full product support, documentation, and qualification for legacy Atmel analog and LED driver portfolios.
The MSL2166-DUR belongs to Microchip's high-performance LED backlight driver family, designed specifically for advanced dimming in large-area LCD TVs and monitors requiring precise per-string control, video synchronization, and adaptive power supply management.
FAQ
What is the maximum LED string current supported by the MSL2166-DUR?
The MSL2166-DUR supports up to 350mA per LED string. This current is set by an external sense resistor where 500mV across the resistor corresponds to full-scale current. The device achieves ±0.8% matching between all 16 strings, ensuring consistent brightness and white point in multi-zone backlight systems. Thermal design must accommodate power dissipation at this current level when driving high-Vf LED strings.
How does the MSL2166-DUR synchronize PWM dimming to video signals?
The MSL2166-DUR uses two dedicated inputs-PHI (typically connected to VSYNC) and GSC (typically connected to HSYNC)-to lock its internal PWM timing engine to the video frame structure. It applies programmable frequency multipliers (1×–32×) to PHI and uses GSC as the gate shift clock, enabling precise frame-aligned dimming with sub-cycle phase resolution. This synchronization eliminates motion blur and waterfall noise in LCD TVs, and the MSL2166-DUR implements this without requiring external timing ICs.
What is the purpose of the FBIN1 pin on the MSL2166-DUR?
The FBIN1 pin on the MSL2166-DUR is an Efficiency Optimizer input that accepts the FBO1 feedback signal from a preceding MSL2166-DUR or MSL2164-DUR device in a daisy-chained configuration. This allows coordinated control of multiple LED power supplies across cascaded drivers, improving overall system efficiency and dynamic response. Unlike the MSL2164-DUR, the MSL2166-DUR includes FBIN1 to enable this multi-supply feedback loop, making it essential for large-panel backlight architectures with distributed power stages.
Can the MSL2166-DUR operate without an external microcontroller?
Yes, the MSL2166-DUR can operate in standalone mode using its internal oscillator for PWM generation, though full functionality requires initial configuration via SPI. Default register values are stored in on-chip EEPROM and loaded at power-up, enabling basic operation without continuous MCU interaction. However, dynamic features like frame-by-frame dimming, fault recovery, and adaptive power correction require SPI communication. The MSL2166-DUR does not replace a system controller but offloads real-time LED timing and regulation tasks from it.
What fault conditions does the MSL2166-DUR detect and report?
The MSL2166-DUR detects and reports open-circuit and short-circuit faults per LED string, loss-of-sync on PHI/GSC inputs, and over-temperature conditions. Fault status is available both through the open-drain FLTB pin (active-low assertion) and detailed registers accessible via SPI (e.g., OCSTAT0/1, SCSTAT0/1, FLTSTATUS). Each string's fault detection can be individually enabled or disabled via STRFLTEN0/1 registers, allowing selective monitoring in partial-string configurations. The MSL2166-DUR retains fault flags until explicitly cleared by reading the corresponding status register.
MSL2166-DUR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- -
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 20MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-TQFN (9x9)
MSL2166-DUR FAQ
1.How can I place an order for MSL2166-DUR through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL2166-DUR 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 MSL2166-DUR reliable?
The price and inventory of MSL2166-DUR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL2166-DUR is usually 5 days.
3.What payment methods are accepted for MSL2166-DUR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL2166-DUR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL2166-DUR?
MSL2166-DUR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL2166-DUR 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 MSL2166-DUR?
For technical support, including MSL2166-DUR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL2166-DUR requirements.
6.How does Aetrix verify that MSL2166-DUR is sourced from the original manufacturer or authorized distributors?
All MSL2166-DUR 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 MSL2166-DUR meets industry standards.
7.What is the process for return or replacement of MSL2166-DUR?
All MSL2166-DUR units undergo pre-shipment inspection (PSI). If there is an issue with MSL2166-DUR, 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 MSL2166-DUR part is unused and in its original packaging.
Return procedure for MSL2166-DUR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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