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Microchip Technology MSL2164-DU
- Part No.:
- MSL2164-DU
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
MSL2164-DU.pdf
- Description:
- IC LED DRIVER LINEAR PWM 64TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,535
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Product details
Overview
MSL2164-DU from Microchip Technology (formerly Atmel) is a 16-string, high-efficiency LED driver IC for LCD TV backlighting, featuring external MOSFET current sinking up to 350mA per string with ±0.8% matching, 20MHz SPI interface, and advanced frame-synchronized PWM dimming with forward/center/reverse/inverse modes. It supports active area dimming in television backlights using VSYNC/HSYNC synchronization and adaptive DC-DC converter control via three FBO outputs.
For engineers reviewing the MSL2164-DU datasheet, MSL2164-DU pinout, MSL2164-DU application, or MSL2164-DU equivalent, key selection considerations include its 64-pin TQFN package, string-level 12-bit PWM control, on-chip EEPROM for power-up configuration, open/short-circuit fault detection per string, and support for cascading up to eight devices on one SPI bus.
Technical Context
The MSL2164-DU implements a distributed LED current regulation architecture using external N-channel MOSFETs per string, with source-sense inputs (S0–S15) and gate-drive outputs (G0–G15) enabling high-voltage/high-current operation. Its internal 10-bit ISTR DAC sets global current reference, while 12-bit STRnSET registers configure per-string PWM timing and phase delay relative to processed PHI (VSYNC-derived) and GSC (HSYNC-derived) clocks.
It integrates an Efficiency Optimizer subsystem with three feedback outputs (FBO1–FBO3) that adaptively adjust external DC-DC converter regulation to minimize power loss without compromising current accuracy. Fault management includes hardware FLTB assertion and register-mapped status for open-circuit, short-circuit, loss-of-sync, and over-temperature events - all configurable per string via STRFLTEN0/1 and FLTEN registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Strings | 16 parallel strings, each driven by external MOSFET with independent current sense and gate drive |
| Max String Current | 350mA per string, set by external sense resistor and 10-bit ISTR DAC (500mV full-scale) |
| Current Matching | ±0.8% string-to-string current matching ensures uniform brightness across display zones |
| PWM Resolution | 12-bit per-string PWM width and phase delay, synchronized to video frame timing via PHI/GSC inputs |
| SPI Interface | 20MHz serial interface supporting up to 8 daisy-chained devices per CSB line with broadcast write capability |
| Fault Detection | Per-string open/short-circuit detection plus loss-of-sync and over-temperature monitoring with FLTB output |
| Package | 64-pin TQFN (9 × 9 × 0.85 mm, 0.5 mm pitch) with exposed thermal pad for high-power dissipation |
Pinout & Package
MSL2164-DU is housed in a 64-pin, 9 mm × 9 mm × 0.85 mm TQFN package with 0.5 mm pitch and exposed thermal pad (EP) connected to power ground. The package supports high thermal performance for continuous 16-string LED driving at up to 350mA per channel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| S0–S15 | Source Sense Input | Connects to MOSFET source and current sense resistor; 500mV across resistor sets full-scale LED current |
| G0–G15 | Gate Drive Output | Drives gate of external N-MOSFET per string; logic-level compatible with standard MOSFETs |
| D0–D15 | Drain Sense Input | Monitors MOSFET drain voltage via 10MΩ resistor for short-circuit detection and fault isolation |
| FBO1–FBO3 | Efficiency Optimizer Output | Analog feedback signals to regulate up to three external DC-DC converters for optimal power efficiency |
| PHI / GSC / PWM | Timing Synchronization Inputs | PHI accepts VSYNC (40Hz–10kHz); GSC accepts HSYNC (≤1.5MHz); PWM enables external dimming control |
| FLTB | Fault Indication Output | Open-drain active-low signal asserting on any detected fault; cleared only after reading fault registers |
Key Features
| Feature | Design Value |
|---|---|
| Frame-synchronized PWM dimming | Four programmable modes (forward/center/reverse/inverse) reduce motion blur and waterfall noise in LCD TVs |
| Per-string phase delay control | 12-bit PHDLYn register aligns PWM "on" time to physical LED position on panel for local dimming accuracy |
| Adaptive power optimization | Patent-pending Efficiency Optimizer dynamically adjusts DC-DC converter feedback to minimize power loss |
| Configurable power-up defaults | On-chip EEPROM stores register states (e.g., STRINGEN, CONFIG, FLTEN) for reliable boot behavior |
| Scalable multi-device architecture | Up to eight MSL2164-DU devices share one SPI bus with individual ADDR pins and broadcast write support |
Applications
| Television Backlighting | Medical Display Systems |
|---|---|
|
Use Scenario: High-dynamic-range (HDR) LCD TV with local dimming zones requiring precise per-area brightness control. IC Role / Device Role / Timing Role: MSL2164-DU acts as the primary LED string controller, synchronizing PWM dimming to VSYNC/HSYNC and managing 16 vertical backlight zones. Use Value: Enables >10,000:1 contrast ratio via real-time frame-by-frame dimming, reducing motion blur through center-aligned PWM and phase spreading. |
Use Scenario: Diagnostic imaging monitor requiring flicker-free, color-stable backlighting under continuous operation. IC Role / Device Role / Timing Role: MSL2164-DU regulates 16 LED strings with ±0.8% current matching and monitors open/short faults to ensure uninterrupted display integrity. Use Value: Maintains consistent white point and luminance uniformity across clinical viewing area, supported by EEPROM-stored calibration settings. |
| Industrial HMI Panels | Architectural Signage |
|
Use Scenario: Ruggedized human-machine interface panel operating in wide temperature range (-40°C to +85°C). IC Role / Device Role / Timing Role: MSL2164-DU provides fault-tolerant LED driving with over-temperature shutdown and hardware FLTB signaling to host MCU. Use Value: Ensures long-term reliability in factory environments via per-string fault isolation and thermal protection without software intervention. |
Use Scenario: Large-format outdoor signage with segmented LED arrays requiring scalable, low-noise dimming. IC Role / Device Role / Timing Role: MSL2164-DU drives multiple 16-string modules in cascade mode, using broadcast SPI writes to synchronize global intensity changes. Use Value: Reduces EMI and input capacitor size via 1/16-phase PWM spreading across strings, improving power supply efficiency and longevity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED string driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TLC6983 | 16-channel constant-current sink with integrated MOSFETs (no external FETs required); max 120mA per channel; no VSYNC-synchronized PWM modes | Better suited for compact, lower-power signage; lacks frame-sync dimming and adaptive power optimization | Select when board space is constrained and external MOSFETs are undesirable; not suitable for 350mA TV backlighting |
| ON Semiconductor NCP5623B | 3-channel I²C LED driver with integrated PWM; max 90mA per channel; no string fault detection or FBO outputs | Targeted at small displays (e.g., tablets); lacks scalability, video sync, and high-current capability | Choose for cost-sensitive, low-channel-count applications where advanced dimming and fault management are unnecessary |
Compared with TLC6983 and NCP5623B, the MSL2164-DU uniquely delivers high-current (350mA), frame-synchronized 16-string control with adaptive power optimization and per-string fault visibility - essential for premium LCD TV backlight systems requiring dynamic local dimming and long-term reliability.
Availability
MSL2164-DU is available at Aetrix Electronics and suitable for LCD television backlighting, medical imaging displays, and industrial HMI panels requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for MSL2164-DU 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 support for legacy Atmel analog and LED driver products, including comprehensive documentation, validation tools, and long-term manufacturing commitment.
The MSL2164-DU belongs to Microchip's high-performance LED backlight driver product line, engineered specifically for LCD TV and professional display applications demanding precision dimming, fault resilience, and adaptive power efficiency.
FAQ
What is the maximum LED string current supported by the MSL2164-DU?
The MSL2164-DU supports up to 350mA per LED string using external N-channel MOSFETs. Full-scale current is set by a 500mV drop across the external current sense resistor, controlled by the 10-bit ISTR DAC register. This current level is confirmed in the datasheet's Absolute Maximum Ratings and Typical Application Circuit sections, and applies directly to the MSL2164-DU under recommended operating conditions.
Does the MSL2164-DU require external MOSFETs, and why?
Yes, the MSL2164-DU requires external N-channel MOSFETs for each of its 16 LED strings. It provides dedicated gate drive outputs (G0–G15) and source/drain sense inputs (S0–S15, D0–D15) to enable high-voltage and high-current operation beyond integrated-driver limitations. This architecture allows design flexibility in LED string voltage and thermal management - a core feature explicitly defined for the MSL2164-DU in the datasheet's Detailed Description and Application Circuit sections.
How does the MSL2164-DU synchronize PWM dimming to video signals?
The MSL2164-DU uses two dedicated inputs - PHI (for VSYNC, 40Hz–10kHz) and GSC (for HSYNC, ≤1.5MHz) - to lock its internal PWM generator to video frame timing. The processed PHI signal serves as the frame reference, while GSC defines the gate shift clock; their frequency ratio determines final PWM resolution. This synchronization mechanism is documented in the MSL2164-DU's Detailed Description and is fundamental to its motion blur reduction capability in LCD TV applications.
What fault detection capabilities does the MSL2164-DU provide?
The MSL2164-DU provides per-string open-circuit and short-circuit detection, plus system-level loss-of-sync and over-temperature monitoring. Fault status is reported both via the open-drain FLTB pin and through dedicated registers (FLTSTATUS, OCSTAT0/1, SCSTAT0/1). Each string's fault detection can be individually enabled/disabled using STRFLTEN0/1 registers - functionality fully specified for the MSL2164-DU in the Register Map and Fault Management sections of the datasheet.
Can multiple MSL2164-DU devices be connected on the same SPI bus?
Yes, up to eight MSL2164-DU devices can be daisy-chained on a single SPI bus using shared MOSI, MISO, SCK, and CSB lines. Each device is assigned a unique address via the ADDR pin, and broadcast writes allow simultaneous configuration of all devices. This multi-device capability is explicitly supported by the MSL2164-DU's 20MHz SPI interface and documented in the datasheet's Application Circuit and SPI Interface sections.
MSL2164-DU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tray
- 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)
MSL2164-DU FAQ
1.How can I place an order for MSL2164-DU through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL2164-DU 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 MSL2164-DU reliable?
The price and inventory of MSL2164-DU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL2164-DU is usually 5 days.
3.What payment methods are accepted for MSL2164-DU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL2164-DU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL2164-DU?
MSL2164-DU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL2164-DU 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 MSL2164-DU?
For technical support, including MSL2164-DU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL2164-DU requirements.
6.How does Aetrix verify that MSL2164-DU is sourced from the original manufacturer or authorized distributors?
All MSL2164-DU 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 MSL2164-DU meets industry standards.
7.What is the process for return or replacement of MSL2164-DU?
All MSL2164-DU units undergo pre-shipment inspection (PSI). If there is an issue with MSL2164-DU, 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 MSL2164-DU part is unused and in its original packaging.
Return procedure for MSL2164-DU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL2164-DU Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR420UFD-7
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BCR421UFD-7
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