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Microchip Technology MSL3163BT
- Part No.:
- MSL3163BT
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
MSL3163BT.pdf
- Description:
- IC LED DRVR LIN PWM 100MA 40TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,665
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Product details
Overview
MSL3163BT from Microchip Technology (formerly Atmel) is a 16-string white/RGB LED driver IC with I²C interface, adaptive DC-DC power control, on-chip E²PROM, and 12-bit per-string PWM dimming. It sinks up to 60mA average / 100mA peak per string with ±3% current accuracy and matching, driving 160 white LEDs (10 per string) for LCD TV and monitor backlighting.
For engineers reviewing the MSL3163BT datasheet, MSL3163BT pinout, MSL3163BT application, or MSL3163BT equivalent, key selection criteria include its 1 MHz I²C serial interface, 40-pin 6×6 mm TQFN package, -40°C to +85°C operation, adaptive source power optimization across up to three shared LED supplies, and frame-synchronized area dimming capability for high-dynamic-range displays.
Technical Context
The MSL3163BT integrates 16 current-sink MOSFETs with programmable 8-bit global and 12-bit individual string intensity registers, synchronized to external VSYNC (PHI) and HSYNC (GSC) inputs. Its Adaptive SourcePower architecture uses three FBOn/FBIn efficiency optimizer channels to dynamically adjust external DC-DC supply voltage based on real-time LED forward voltage requirements.
It features broadcast-write register access, fault detection for open/short circuits per string, over-temperature shutdown, and an on-chip 2.5V LDO (VDD) powered from 5V VIN. The I²C interface supports up to 16 devices on one bus with address selection via AD0/AD1 pins and includes noise-suppression filters on SDA/SCL/AD inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | I²C at 1 MHz - enables daisy-chained configuration of up to 16 devices with slave address set by AD0/AD1 pins |
| LED String Drive | 16 × current-sink outputs, each rated 40V max, 100mA peak, 60mA average - supports 10-white-LED strings per channel |
| Current Accuracy | ±3% matching and regulation - ensures consistent brightness and white point across all 16 strings without external calibration |
| PWM Resolution | 12-bit per string + 8-bit global intensity - delivers >4096-step dimming control with video-frame synchronization |
| Efficiency Optimization | Three FBOn/FBIn channels - dynamically adjusts up to three shared LED power supplies to minimum required voltage, reducing system power loss |
| Operating Temp | -40°C to +85°C - qualified for industrial and automotive display applications including infotainment and instrument clusters |
| Package | 40-pin TQFN, 6 mm × 6 mm × 0.75 mm with exposed thermal pad - provides low thermal resistance for high-current LED sink operation |
Pinout & Package
MSL3163BT is housed in a 40-pin, 6 mm × 6 mm × 0.75 mm TQFN package with exposed thermal pad (EP). Pin pitch is 0.5 mm. The package supports high-power dissipation and requires short, wide traces from EP to system ground and LED power return paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| STR0–STR15 | LED string current sink outputs | 16 dedicated cathode-side sinks; each drives one LED string with programmable 12-bit PWM and 8-bit global intensity scaling |
| ILED | Global peak current reference input | Single resistor (e.g., 12.7 kΩ) sets full-scale sink current for all strings: ISTRING = 762 / RILED (mA) |
| SCL / SDA | I²C serial clock/data I/O | 1 MHz bidirectional interface; supports multi-device addressing and broadcast writes for synchronized backlight updates |
| PHI / GSC | Video sync inputs | PHI accepts VSYNC (40 Hz–10 kHz); GSC accepts HSYNC (0–10 MHz); enables frame-locked dimming and phase spreading |
| FLTB | Fault indication output | Open-drain active-low signal asserting on open/short circuit, sync loss, or over-temperature - clears only after EN toggle or register read |
| AD0 / AD1 | Slave address selection | Two-pin binary encoding selects one of four I²C addresses (0x60–0x63), enabling up to 16 devices per bus via address extension |
| EN | Enable input | Active-high logic input; powers up device and triggers boot-load of E²PROM defaults into control registers |
| FBO1–FBO3 / FBI1–FBI3 | Efficiency Optimizer I/O | Three feedback channels for cascading control of external DC-DC supplies; FBO injects 0–255 µA to adjust output voltage in real time |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive SourcePower control | Real-time negotiation among up to 16 MSL3163BT devices to minimize shared LED supply voltage - reduces power loss and heat generation |
| Per-string 12-bit PWM + phase adjustment | Eliminates motion blur and LCD artifacts by staggering PWM on-times across strings - no additional timing controller required |
| On-chip E²PROM with customizable defaults | Stores power-up register values (e.g., ISTR, PWMn, STRnEN); eliminates boot-time host initialization overhead |
| String-level fault monitoring | Detects open-circuit, short-circuit, and thermal faults per STRn; enables selective string disable without affecting others |
| Low-leakage off-state | <1 µA per string when disabled - prevents unintended LED glow during standby or partial dimming |
Applications
| Television Backlighting | Medical Imaging Displays |
|---|---|
Use Scenario: High-dynamic-range (HDR) LCD TVs requiring local dimming zones across 160+ LEDs per panel. IC Role / Device Role / Timing Role: Primary LED string driver with VSYNC/GSC-synchronized PWM and adaptive power supply control. Use Value: Enables >10,000:1 contrast ratio via per-area dimming while maintaining color fidelity and minimizing power consumption. | Use Scenario: Diagnostic monitors in MRI/CT suites where stable, flicker-free illumination and long service life are critical. IC Role / Device Role / Timing Role: Precision current-regulated LED driver with ±3% matching and fault reporting for safety-critical backlighting. Use Value: Ensures uniform luminance and zero visible flicker under 60 Hz–120 Hz medical video standards, meeting IEC 62366 usability requirements. |
| Automotive Infotainment | Architectural Signage |
Use Scenario: In-vehicle LCD displays operating in wide ambient temperature (-40°C to +85°C) with vibration and EMI exposure. IC Role / Device Role / Timing Role: Robust LED driver with integrated fault detection, thermal shutdown, and noise-filtered I²C interface. Use Value: Maintains consistent brightness and avoids hot-spotting despite LED Vf drift over temperature and lifetime - validated per AEC-Q100 Class 2. | Use Scenario: Large-format outdoor signage using RGB LED arrays for dynamic color rendering and energy-efficient operation. IC Role / Device Role / Timing Role: White/RGB-capable string driver supporting 16-channel independent intensity control and global current tuning. Use Value: Delivers accurate white point and smooth grayscale transitions across large panels using single-resistor current setting and 12-bit PWM resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED string driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSL3164BT | 20 MHz SPI interface instead of 1 MHz I²C; replaces SDA/SCL with MOSI/MISO/SCK/CSB pins; identical pinout except interface pins | Better suited for high-speed, low-latency systems with SPI master infrastructure; not compatible with I²C-only hosts | Select MSL3164BT when system MCU has SPI peripherals and requires faster register updates or tighter timing control than I²C allows. |
| TLC6983RTQR | 16-channel constant-current LED driver with 12-bit PWM; uses SPI interface; lacks adaptive power control and E²PROM; different pinout and package (48-pin QFN) | No built-in efficiency optimizer or video sync inputs; requires external microcontroller for area dimming logic and supply voltage management | Choose TLC6983RTQR for cost-sensitive designs where adaptive power optimization is unnecessary and host MCU handles timing coordination. |
Compared with MSL3163BT, MSL3164BT offers higher serial bandwidth but requires SPI hardware support, while TLC6983RTQR provides basic 12-bit dimming without integrated power optimization or video synchronization - making MSL3163BT uniquely suited for HDR LCD backlighting with minimal host intervention.
Availability
MSL3163BT is available at Aetrix Electronics and suitable for television backlighting, medical imaging displays, and automotive infotainment systems requiring stable component supply, long-lifecycle support, and guaranteed traceability.
Supply support for MSL3163BT 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 continues to develop, manufacture, and support its high-performance LED driver portfolio for display and lighting applications.
The MSL3163BT belongs to Microchip's Atmel LED Driver family, designed specifically for high-efficiency, video-synchronized LCD backlighting in premium consumer, medical, and automotive displays.
FAQ
What is the maximum number of MSL3163BT devices that can be connected on a single I²C bus?
The MSL3163BT supports up to 16 devices on one I²C bus using AD0 and AD1 pins to configure four unique base addresses (0x60–0x63). Address extension via software-configurable device ID registers enables full 16-device daisy chaining with broadcast write capability - essential for large-panel backlighting with >2560 total LEDs.
Does the MSL3163BT require an external oscillator or crystal?
No, the MSL3163BT contains an internal oscillator (18.15–21.88 MHz typical) used for PWM timing and register operations. External clock sources are optional: PHI input synchronizes PWM to VSYNC, and GSC input aligns string phase to HSYNC - eliminating need for external crystals while ensuring precise video-frame alignment.
How does the MSL3163BT achieve adaptive power control without external microcontroller intervention?
The MSL3163BT implements autonomous Adaptive SourcePower control through its three FBOn/FBIn efficiency optimizer channels. When multiple MSL3163BT devices share LED power supplies, they communicate directly via these pins to negotiate the minimum required supply voltage - adjusting in real time based on LED forward voltage drift, temperature, and dimming level - all without host CPU involvement.
Can the MSL3163BT drive RGB LED strings, or is it limited to white LEDs?
Yes, the MSL3163BT supports RGB LED strings. Its 16 independent current sinks, 12-bit per-string PWM, and global current tuning enable precise color mixing and white point control. The datasheet explicitly identifies it as a "16-string White & RGB LED Driver", and its 40V string voltage rating accommodates typical RGB LED forward voltages in series configurations.
What fault conditions does the MSL3163BT detect, and how is fault status reported?
The MSL3163BT detects open-circuit and short-circuit faults per string, loss of PHI or GSC sync, and over-temperature conditions. Faults assert the open-drain FLTB pin (active low) and are logged in dedicated registers (FLTSTATUS, OCSTAT0/1, SCSTAT0/1). Individual string fault masking is configurable via FLTMASK0/1, allowing selective disablement without interrupting other strings.
MSL3163BT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Adaptive SourcePower™
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 4.75V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 100mA
- Frequency:
- 20MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-TQFN (6x6)
MSL3163BT FAQ
1.How can I place an order for MSL3163BT through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL3163BT 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 MSL3163BT reliable?
The price and inventory of MSL3163BT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL3163BT is usually 5 days.
3.What payment methods are accepted for MSL3163BT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL3163BT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL3163BT?
MSL3163BT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL3163BT 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 MSL3163BT?
For technical support, including MSL3163BT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL3163BT requirements.
6.How does Aetrix verify that MSL3163BT is sourced from the original manufacturer or authorized distributors?
All MSL3163BT 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 MSL3163BT meets industry standards.
7.What is the process for return or replacement of MSL3163BT?
All MSL3163BT units undergo pre-shipment inspection (PSI). If there is an issue with MSL3163BT, 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 MSL3163BT part is unused and in its original packaging.
Return procedure for MSL3163BT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL3163BT Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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