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Microchip Technology MSL3082CS
- Part No.:
- MSL3082CS
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 44-VFQFN Exposed Pad
- Datasheet:
-
MSL3082CS.pdf
- Description:
- IC LED DRIVER LINEAR PWM 44QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,810
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Product details
Overview
MSL3082CS from Microchip Technology (formerly Atmel) is an 8-string, high-power LED driver IC designed for precise current control in edge-lit TV backlights and intelligent solid-state lighting systems. It delivers ≥500mA per string with ±1% current accuracy and matching, supports 1MHz I²C/SMBus interface for up to 16 daisy-chained devices, and integrates Adaptive SourcePower™ efficiency optimization with fault detection for open/short LED strings.
For engineers reviewing the MSL3082CS datasheet, MSL3082CS pinout, MSL3082CS application, or MSL3082CS equivalent, this page provides verified technical context on video-synchronized PWM dimming, phase-shifted string drive for motion blur reduction, EEPROM-configurable power-up defaults, thermal derating, and real-time DC-DC supply negotiation across multi-device chains.
Technical Context
The MSL3082CS implements a dual-stage LED control architecture: peak current regulation via external sense resistors (500mV threshold) combined with 10-bit total PWM resolution-6-bit global intensity (GINT) plus 8-bit per-string pulse width (PWM0–PWM7). Its PWM engine synchronizes to external PHI (40Hz–10kHz) and GSC (up to 5MHz) inputs for frame- and line-locked dimming in LCD TV backlighting.
It features a patented Adaptive SourcePower™ system where up to eight MSL3082CS devices chain via FBI/FBO pins to negotiate optimal LED string supply voltage, minimizing power loss while maintaining current accuracy. Fault management includes hardware FLTB output and register-accessible status for open-circuit, short-circuit, sync-loss, and over-temperature events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED strings | 8 parallel strings, each driven by external N-channel MOSFETs |
| Max string current | ≥500mA per string, set by external sense resistor (500mV full-scale) |
| Current accuracy | ±1% matching across strings ensures consistent white point and color gamut |
| I²C/SMBus speed | 1MHz interface enables <1.47ms update of 128 strings (16 devices) for 640Hz area dimming |
| PWM resolution | 10-bit effective (6-bit global + 8-bit per-string), enabling fine-grained brightness and area control |
| Operating temp | −40°C to +105°C ambient, with automatic die over-temperature shutdown at 135°C |
| Package | 44-pin QFN (7mm × 7mm × 0.85mm, 0.5mm pitch) with exposed thermal pad |
Pinout & Package
MSL3082CS is housed in a thermally enhanced 44-pin QFN (7mm × 7mm × 0.85mm, 0.5mm pitch) with exposed pad (EP) for ground and thermal dissipation. Pin assignment follows JEDEC MO-220 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCL / SDA | I²C serial interface | 1MHz bidirectional bus for configuration, fault readback, and broadcast updates |
| AD0 / AD1 | I²C slave address select | Set unique 7-bit address (0x40–0x47) for up to 8 devices on same bus |
| FLTB | Fault output (open-drain) | Active-low signal asserts on open/short LED, sync loss, or over-temp; cleared only by register read or EN toggle |
| FBI / FBO | Efficiency Optimizer chain interface | FBO injects 0–45µA into external DC-DC feedback node; FBI accepts upstream FBO for multi-device voltage negotiation |
| S0–S7 | String source sense inputs | Connect to MOSFET source + current sense resistor; regulate current at 500mV threshold |
| G0–G7 | MOSFET gate drive outputs | Drive external N-FET gates with ±20mA peak current and 10mA/µs slew rate |
| D0–D7 | Drain sense inputs | Monitor MOSFET drain voltage via 10MΩ resistor for short-circuit detection (6.5–9.0V threshold) |
| PHI / GSC | Video synchronization inputs | PHI locks to VSYNC (40Hz–10kHz); GSC aligns to HSYNC (≤5MHz) for pixel-accurate PWM phasing |
| PWM | Direct PWM input | Accepts 20Hz–50kHz external PWM signal to override internal engine for global brightness control |
| EN | Enable input | Active-high logic enables VDD regulator and all functions; toggling clears fault registers |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive SourcePower™ | Up to 8 MSL3082CS devices auto-negotiate minimum LED supply voltage, reducing power loss without sacrificing current accuracy |
| Phase-shifted string drive | Programmable per-string PWM phase delay eliminates waterfall noise and reduces transient load on shared power supply |
| 10-bit total PWM resolution | Combines 6-bit global intensity (GINT) and 8-bit per-string PWM registers for precise area dimming and uniform luminance |
| EEPROM-configurable defaults | All registers (0x00–0x59) power up with factory or user-programmed values stored in on-chip EEPROM |
| Comprehensive fault coverage | Detects and reports open/short LED strings, sync loss, and over-temperature via FLTB and readable status registers |
Applications
| Edge-lit LED Backlit TVs | High-contrast Monitors |
|---|---|
|
Use Scenario: Driving top/bottom edge-lit LED arrays behind large-format LCD panels with dynamic local dimming. IC Role / Device Role / Timing Role: LED string controller synchronized to VSYNC/HSYNC signals for frame-locked area dimming and motion blur suppression. Use Value: Enables >10,000:1 contrast ratio via per-zone brightness control while eliminating visual artifacts through phase-shifted PWM timing. |
Use Scenario: Powering multi-string direct-backlight modules in medical imaging and industrial control displays requiring stable white point. IC Role / Device Role / Timing Role: High-accuracy current regulator with ±1% matching across 8 strings, supporting RGB or white LED configurations. Use Value: Maintains color fidelity and luminance uniformity across temperature (-40°C to +105°C) and aging, critical for diagnostic-grade displays. |
| Intelligent Solid-state Lighting | High-power LED Arrays |
|
Use Scenario: Smart architectural lighting systems with programmable dimming profiles and thermal derating. IC Role / Device Role / Timing Role: Digital LED driver with EEPROM-stored startup defaults and programmable over-temperature compensation (OTSLOPE). Use Value: Supports remote firmware-based reconfiguration of intensity, phase, and safety thresholds without hardware changes. |
Use Scenario: Industrial signage and stage lighting using high-current LED strings powered by external boost converters. IC Role / Device Role / Timing Role: Gate driver and current monitor for external MOSFETs, enabling >500mA per string with low-leakage (<1µA off-state). Use Value: Delivers scalable power handling-string count and current limited only by external FETs and supply-not by the MSL3082CS itself. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-string LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Texas Instruments TLC6983 | 8-channel constant-current LED driver with integrated 40V MOSFETs; no external FET requirement; max 120mA/channel | Better suited for lower-current, space-constrained designs; lacks adaptive supply negotiation and video sync inputs | Select when board area is critical and string current ≤120mA; avoid for high-power TV backlighting requiring >500mA/string |
| ON Semiconductor CAT4201 | Single-channel, 350mA constant-current LED driver with analog/digital dimming; no I²C interface or multi-string support | Designed for simple single-string applications like indicator lighting; no fault reporting or thermal management | Use only for basic, low-channel-count lighting; not a functional substitute for MSL3082CS's 8-string, video-sync, and fault-aware architecture |
Compared with TLC6983 and CAT4201, the MSL3082CS uniquely combines high-current capability (>500mA/string), video-synchronized multi-string PWM, adaptive supply optimization, and comprehensive fault diagnostics-making it purpose-built for premium LCD backlighting and intelligent SSL systems where performance, reliability, and dynamic control are non-negotiable.
Availability
MSL3082CS is available at Aetrix Electronics and suitable for edge-lit TV backlights, high-contrast medical monitors, and intelligent solid-state lighting systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MSL3082CS 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 its high-performance analog and LED driver portfolio. The company specializes in embedded control, connectivity, and power management solutions for industrial, automotive, and consumer markets.
The MSL3082CS belongs to Microchip's legacy Atmel LED driver family, engineered specifically for high-dynamic-range LCD backlighting and intelligent SSL applications demanding precision current control, video synchronization, and system-level power optimization.
FAQ
What is the maximum LED string current supported by the MSL3082CS?
The MSL3082CS supports ≥500mA per string, set by an external current-sense resistor (RSn) with a 500mV regulation threshold. For example, a 1.00Ω resistor yields 500mA full-scale current. Current is digitally trimmed per string using 6-bit ISTR registers, and thermal derating applies above programmable temperature thresholds. The actual limit depends on external MOSFET selection and thermal design-not the MSL3082CS itself.
Does the MSL3082CS require external MOSFETs, and why?
Yes, the MSL3082CS requires external N-channel MOSFETs for LED string switching. Its G0–G7 outputs drive external FET gates, while S0–S7 monitor source voltage for current regulation. This architecture decouples high-power handling from the IC, enabling >500mA per string, superior thermal management, and flexibility in FET selection (e.g., low RDS(on), fast switching) - unlike integrated-driver alternatives limited to ~120mA.
How does the MSL3082CS achieve motion blur reduction in LCD backlights?
The MSL3082CS reduces motion blur by synchronizing per-string PWM off-times with LCD pixel update timing using PHI (VSYNC) and GSC (HSYNC) inputs. Programmable phase delay (PHDLY0–PHDLY7) shifts each string's PWM waveform so LED dimming occurs during LCD refresh intervals - eliminating "waterfall" artifacts and improving perceived contrast without requiring panel-level changes. This is enabled only when using the internal PWM engine, not direct PWM mode.
Can multiple MSL3082CS devices share a single LED string power supply?
Yes - up to eight MSL3082CS devices can be chained via FBI/FBO pins to jointly optimize a common LED string supply voltage. Each device's FBO injects current into the DC-DC converter's feedback node; the chain negotiates the minimum voltage needed to maintain regulation across all strings. Accuracy degrades by ≤2% per link, so worst-case FBO current must be recalculated for RTOP resistor selection in multi-device configurations.
What fault conditions does the MSL3082CS detect, and how are they reported?
The MSL3082CS detects open-circuit LEDs (via S0–S7 voltage >7.3V), short-circuited LEDs (D0–D7 voltage <6.5V), loss of PHI/GSC sync, and die over-temperature (>135°C). Faults assert the open-drain FLTB pin low and populate status bits in FLTSTATUS (0x07), OCSTAT (0x09), and SCSTAT (0x0A) registers. FLTB remains asserted until faults are read or EN is toggled - ensuring MCU-level notification without polling overhead.
MSL3082CS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Adaptive SourcePower™
- Package/Case:
- 44-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Obsolete
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 8
- Voltage - Supply (Min):
- 10.8V
- Voltage - Supply (Max):
- 13.2V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 20MHz
- Dimming:
- PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 44-QFN (7x7)
MSL3082CS FAQ
1.How can I place an order for MSL3082CS through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL3082CS 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 MSL3082CS reliable?
The price and inventory of MSL3082CS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL3082CS is usually 5 days.
3.What payment methods are accepted for MSL3082CS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL3082CS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL3082CS?
MSL3082CS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL3082CS 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 MSL3082CS?
For technical support, including MSL3082CS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL3082CS requirements.
6.How does Aetrix verify that MSL3082CS is sourced from the original manufacturer or authorized distributors?
All MSL3082CS 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 MSL3082CS meets industry standards.
7.What is the process for return or replacement of MSL3082CS?
All MSL3082CS units undergo pre-shipment inspection (PSI). If there is an issue with MSL3082CS, 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 MSL3082CS part is unused and in its original packaging.
Return procedure for MSL3082CS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL3082CS Tags
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BCR402RE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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