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Microchip Technology MSL2041GU-R
- Part No.:
- MSL2041GU-R
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 32-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MSL2041GU-R.pdf
- Description:
- IC LED DRIVER LINEAR PWM 32SOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,271
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Product details
Overview
MSL2041GU-R from Microchip Technology (formerly Atmel) is a 4-string LED driver IC that controls external N-channel MOSFETs to sink up to 1 A per string with ±0.5% current matching, supports independent PWM dimming on all four strings, delivers 5000:1 dimming range, and integrates Adaptive SourcePower™ efficiency optimization for DC-DC converters - used in LCD-TV backlight systems requiring precise per-string brightness control.
For engineers reviewing the MSL2041GU-R datasheet, MSL2041GU-R pinout, MSL2041GU-R application, or MSL2041GU-R equivalent, key selection criteria include per-string PWM input capability, external MOSFET gate drive (G0–G3), drain/source sense inputs (D0–D3, S0–S3), fault detection (FLTB), and I²C interface for optional monitoring - all in a 32-pin SOP package rated for –40°C to +85°C operation.
Technical Context
The MSL2041GU-R implements a stand-alone LED string controller architecture with four independent gate drivers (G0–G3), each paired with dedicated drain (D0–D3) and source (S0–S3) sense inputs to regulate current via external MOSFETs and shunt resistors. It uses an internal 8-bit DAC (register 0x0E, default 127) to set current regulation voltage at 490 mV (typ.) across the sense resistor.
Its Adaptive SourcePower™ system provides two feedback outputs (FBO1/FBO2) that inject programmable current (0–210 µA, 1.1 µA/LSB) into external DC-DC converter feedback networks to dynamically minimize supply voltage while maintaining current regulation - with automatic inter-device negotiation when cascaded for >4-string systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIN Supply Voltage | 10.8–13.2 V - powers internal LDOs (VCC = 5 V, VDD = 2.5 V); requires 1.0 µF ceramic bypass at pin 28. |
| Max String Current | 1 A per string - set by external source resistor (e.g., 0.715 Ω for 350 mA full scale); regulated at 490 mV (typ.) across RS. |
| Current Matching | ±0.5% (25°C) - ensures consistent luminance across four LED strings without active calibration. |
| PWM Dimming Range | 5000:1 - achieved via combined 8-bit DAC current control and external PWM frequency/duty cycle modulation. |
| Fault Detection | Open-circuit (≥6 V at Dn) and short-circuit (≤6 V at Dn) detection per string - pulls open-drain FLTB low upon verification. |
| Operating Temp | –40°C to +85°C - specified for industrial and display applications; thermal shutdown at 135°C (hysteresis to 120°C). |
| I²C Interface | Up to 1 MHz - optional for reading fault registers, configuring current DAC, enabling current fold-back, and managing EO parameters. |
Pinout & Package
MSL2041GU-R is housed in a 32-pin, 300-mil SOP package (20.52 mm × 7.49 mm × 2.49 mm, 1.27 mm pitch), lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 FBO1 | Efficiency Optimizer feedback output 1 | Drives feedback node of first external DC-DC converter; connects to FBI1 of next device in cascade chain. |
| 2 EN | Enable input (active high) | High = normal operation; low = reset all registers and release FLTB; auto-start via 100 kΩ pull-up to VIN. |
| 3 PWM3 | PWM dimming input 3 | Controls brightness, frequency, and phase of LED string 3 independently; unused → ground. |
| 4 PWM2 | PWM dimming input 2 | Controls brightness, frequency, and phase of LED string 2 independently; unused → ground. |
| 5 PWM1 | PWM dimming input 1 | Controls brightness, frequency, and phase of LED string 1 independently; unused → ground. |
| 6 PWM0 | PWM dimming input 0 | Controls brightness, frequency, and phase of LED string 0; unused → ground. |
| 7 FLTB | Fault indication output (open-drain, active low) | Sinks current on open-circuit/short-circuit/over-temperature; cleared by toggling EN low then high. |
| 8 SCL | I²C serial clock input | Accepts up to 1 MHz clock; includes 50 ns noise filter; requires external pull-up. |
| 9 SDA | I²C serial data I/O | Bi-directional; includes 50 ns noise filter; requires external pull-up. |
| 10 D0 | Drain sense input 0 | Monitors drain voltage of external MOSFET for string 0; detects open/short faults; unused → ground. |
| 11 G0 | Gate output 0 | Drives gate of external N-MOSFET for string 0; optimized for ≤3 V threshold FETs; unused → ground. |
| 12 S0 | Source sense input 0 | Connects to MOSFET source and current sense resistor; regulates current at 490 mV (typ.); unused → VDD. |
| 13 D1 | Drain sense input 1 | Monitors drain voltage of external MOSFET for string 1; unused → ground. |
| 14 G1 | Gate output 1 | Drives gate of external N-MOSFET for string 1; unused → ground. |
| 15 S1 | Source sense input 1 | Connects to MOSFET source and current sense resistor for string 1; unused → VDD. |
| 16,17,24 NC | No internal connection | Not bonded; must remain unconnected. |
| 18 D2 | Drain sense input 2 | Monitors drain voltage of external MOSFET for string 2; unused → ground. |
| 19 G2 | Gate output 2 | Drives gate of external N-MOSFET for string 2; unused → ground. |
| 20 S2 | Source sense input 2 | Connects to MOSFET source and current sense resistor for string 2; unused → VDD. |
| 21 S3 | Source sense input 3 | Connects to MOSFET source and current sense resistor for string 3; unused → VDD. |
| 22 G3 | Gate output 3 | Drives gate of external N-MOSFET for string 3; unused → ground. |
| 23 D3 | Drain sense input 3 | Monitors drain voltage of external MOSFET for string 3; unused → ground. |
| 25 VDD | 2.5 V internal LDO regulator output | Powers internal logic; requires 2.2 µF ceramic bypass to GND near pin. |
| 26 CVDD | Connect to VDD | Internal tie to VDD; must be connected externally. |
| 27 VCC | 5 V internal LDO regulator output | Powers internal logic; requires 2.2 µF ceramic bypass to GND near pin. |
| 28 VIN | Supply voltage input | 12 V ±10% main supply; 50 mA max; bypass with 1.0 µF ceramic capacitor. |
| 29 GND | Power ground | System ground reference for all supplies and signals. |
| 30 FBI2 | Efficiency Optimizer feedback input 2 | Receives FBO2 from previous device in cascade; unused → ground. |
| 31 FBO2 | Efficiency Optimizer feedback output 2 | Drives feedback node of second external DC-DC converter; unused → leave open. |
| 32 FBI1 | Efficiency Optimizer feedback input 1 | Receives FBO1 from previous device in cascade; unused → ground. |
Key Features
| Feature | Design Value |
|---|---|
| Four independent PWM inputs | Enables per-string dimming, frequency, and phase control - eliminates visible beat frequencies in multi-string displays. |
| Adaptive SourcePower™ Efficiency Optimizer | Dynamically adjusts external DC-DC output voltage to minimum required for current regulation - reduces power loss and heat in LED power stage. |
| ±0.5% string current matching | Ensures uniform brightness across four LED strings without manual trimming or closed-loop calibration circuits. |
| Open- and short-circuit fault detection | Verifies faults per string using dual-threshold (6 V) sensing on Dn pins - disables faulty string and asserts FLTB without affecting others. |
| Stand-alone operation | Operates without I²C; only requires PWM inputs, external MOSFETs, sense resistors, and DC-DC supplies - simplifies BOM and layout. |
Applications
| LCD-TV Backlighting | PC Monitor Backlighting |
|---|---|
|
Use Scenario: Driving four parallel LED strings behind edge-lit or direct-lit LCD panels with local dimming zones. IC Role / Device Role / Timing Role: Primary LED string controller managing per-string current and PWM timing to enable dynamic contrast and zone-specific dimming. Use Value: Enables 5000:1 dimming range and ±0.5% current matching - critical for minimizing banding artifacts and achieving uniform luminance across large displays. |
Use Scenario: Controlling backlight intensity and uniformity in high-resolution desktop monitors with narrow bezels. IC Role / Device Role / Timing Role: Stand-alone LED driver coordinating four strings via independent PWM inputs to suppress flicker and maintain color point stability. Use Value: Eliminates need for microcontroller-based timing control - reduces system cost and firmware complexity while supporting high-frequency PWM (>50 kHz). |
| Industrial Display Backlighting | Street Lighting Driver Module |
|
Use Scenario: Powering ruggedized LED arrays in factory HMIs, medical displays, or outdoor kiosks operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Fault-tolerant LED controller with open/short detection and thermal shutdown - ensures continuous operation in harsh environments. Use Value: FLTB output enables system-level fault logging; Adaptive SourcePower™ maintains efficiency despite LED Vf drift over temperature and lifetime. |
Use Scenario: Modular LED driver design for smart streetlights with scalable string count (via MSL2041GU-R cascading) and remote monitoring. IC Role / Device Role / Timing Role: Core LED string controller interfacing with external DC-DC and I²C-enabled MCU for telemetry and diagnostics. Use Value: I²C interface allows real-time readout of fault registers and current DAC settings - supports predictive maintenance and energy reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 4-string LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSL2042GU-R | Single PWM input with automatic 90° phase shift across four strings; no per-string PWM capability. | Better suited for cost-sensitive, non-local-dimming applications where phase spreading reduces input capacitor size. | Select MSL2042GU-R if independent string control is unnecessary and EMI reduction via phase spreading is prioritized. |
| TLC6983RTQR (Texas Instruments) | Integrated 16-bit PWM generator with 32 constant-current channels; no external MOSFET support; max 120 mA/channel. | Targets high-channel-count, low-current signage and architectural lighting - not suitable for high-power TV backlights. | Choose TLC6983RTQR only for designs requiring >4 strings at <120 mA with integrated PWM generation and no external FETs. |
Compared with MSL2042GU-R, the MSL2041GU-R provides true per-string dimming flexibility but requires four PWM sources; compared with TLC6983RTQR, it trades channel count and integration for higher per-string current (1 A vs. 120 mA) and external FET scalability.
Availability
MSL2041GU-R is available at Aetrix Electronics and suitable for LCD-TV backlighting, industrial display systems, and street-lighting modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSL2041GU-R 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 the legacy Atmel LED driver portfolio, including qualification, documentation, and technical resources.
The MSL2041GU-R belongs to Microchip's high-efficiency LED backlight controller product line, designed specifically for multi-string, high-current display applications requiring adaptive power optimization and robust fault management.
FAQ
What is the maximum LED string current supported by the MSL2041GU-R?
The MSL2041GU-R supports up to 1 A per LED string when used with appropriately rated external N-channel MOSFETs and current sense resistors. The actual current is set by the voltage across the sense resistor (regulated at 490 mV typical) and the resistor value - for example, a 0.49 Ω resistor yields 1 A full-scale current. Thermal design and PCB layout must accommodate power dissipation in the external FETs.
Does the MSL2041GU-R require an I²C interface to operate?
No, the MSL2041GU-R operates fully stand-alone using only the four PWM inputs, EN signal, and external components (MOSFETs, sense resistors, and DC-DC supplies). The I²C interface (SCL/SDA pins) is optional and used only for advanced functions like fault register readout, current DAC configuration, or Adaptive SourcePower™ parameter tuning - not needed for basic dimming or current regulation.
How does the MSL2041GU-R detect LED string faults?
The MSL2041GU-R detects open-circuit and short-circuit faults per string using dedicated drain-sense inputs (D0–D3). An open circuit is flagged when the drain voltage exceeds 6 V (typ.), indicating no current flow; a short circuit is flagged when the drain voltage falls below 6 V (typ.), indicating excessive current bypass. Upon verified fault, the corresponding string is disabled and FLTB is pulled low.
Can multiple MSL2041GU-R devices be synchronized for larger LED arrays?
Yes, multiple MSL2041GU-R devices can be cascaded using the FBO1/FBI1 and FBO2/FBI2 pins to coordinate Adaptive SourcePower™ feedback across a shared DC-DC supply. When chained, devices negotiate the optimal supply voltage in real time - enabling scalable designs for >4 LED strings while maintaining efficiency and current accuracy without additional controllers.
What package type and thermal specifications apply to the MSL2041GU-R?
The MSL2041GU-R is supplied in a 32-pin, 300-mil SOP package (20.52 mm × 7.49 mm × 2.49 mm) with lead-free, RoHS-compliant finish. It operates from –40°C to +85°C ambient, with thermal shutdown activating at 135°C junction temperature and automatic recovery at 120°C. Continuous power dissipation is rated at 1576 mW at 70°C ambient, derating 28.7 mW/°C above that.
MSL2041GU-R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Adaptive SourcePower™
- Package/Case:
- 32-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 10.8V
- Voltage - Supply (Max):
- 13.2V
- Voltage - Output:
- 9.6V
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-SOP
MSL2041GU-R FAQ
1.How can I place an order for MSL2041GU-R through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL2041GU-R 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 MSL2041GU-R reliable?
The price and inventory of MSL2041GU-R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL2041GU-R is usually 5 days.
3.What payment methods are accepted for MSL2041GU-R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL2041GU-R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL2041GU-R?
MSL2041GU-R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL2041GU-R 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 MSL2041GU-R?
For technical support, including MSL2041GU-R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL2041GU-R requirements.
6.How does Aetrix verify that MSL2041GU-R is sourced from the original manufacturer or authorized distributors?
All MSL2041GU-R 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 MSL2041GU-R meets industry standards.
7.What is the process for return or replacement of MSL2041GU-R?
All MSL2041GU-R units undergo pre-shipment inspection (PSI). If there is an issue with MSL2041GU-R, 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 MSL2041GU-R part is unused and in its original packaging.
Return procedure for MSL2041GU-R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL2041GU-R Tags
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