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Microchip Technology MSL1061AV
- Part No.:
- MSL1061AV
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MSL1061AV.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,797
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Product details
Overview
MSL1061AV from Microchip Technology (formerly Atmel) is a 6-string PWM LED driver IC with integrated digitally compensated 1.1 MHz, 48 V boost regulator, ±1.5% string-to-string current balance, I²C/SMBus interface, and 28-pin TQFN package. It delivers up to 30 mA per string across six independent current sinks for backlighting up to 72 white LEDs at 8 W.
For engineers reviewing the MSL1061AV datasheet, MSL1061AV pinout, MSL1061AV application, or MSL1061AV equivalent, key selection considerations include its 4.75–36 V input range, internal 50 V/2 A MOSFET switch, 12-bit combined PWM + analog dimming resolution, ALS/NTC support, and fault reporting via FLTB pin and I²C status register.
Technical Context
The MSL1061AV implements a current-mode PWM boost regulator with digital control loop-no external compensation required-and automatically regulates output voltage to meet the highest string voltage demand among STR0–STR5. Its internal oscillator (set by 115 kΩ on OSC) fixes switching frequency at 1.1 MHz, enabling compact magnetics and low EMI.
It integrates dual linear regulators (VCC = 6 V, VDD = 2.9 V), supports both I²C-controlled and pin-driven operation (EN, PWM, ILED, IADJ), and performs real-time open-circuit/short-circuit detection per string with automatic disable and FLTB assertion. The AD0 pin selects one of four I²C slave addresses (0x60–0x63), distinguishing it from the fixed-address MSL1064.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.75 V to 36 V - supports wide industrial and automotive supply rails without pre-regulation |
| Boost Output Voltage | Up to 48 V - powers strings of up to 12 white LEDs (3.75 V max VF) with 600 mV headroom |
| LED String Current | Adjustable up to 30 mA per string - set via ILED pin resistor (e.g., 66.7 kΩ = 30 mA) |
| Current Matching | ±1.5% max mismatch - ensures uniform brightness across all six strings in backlight applications |
| Switching Frequency | 1.1 MHz (typ.) - enables use of small 10 µH inductors and low-ESR ceramic output capacitors |
| I²C Interface Speed | Up to 1 MHz - allows fast register access for dynamic dimming and fault interrogation |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive display environments |
Pinout & Package
MSL1061AV uses a lead-free, halogen-free, RoHS-compliant 5 mm × 5 mm × 0.75 mm TQFN package with 28 pins and 0.5 mm pitch, featuring an exposed thermal pad for enhanced power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Supplies boost regulator and internal LDOs; bypass with ≥1 µF ceramic capacitor to GND |
| EN | Enable control | Active-high logic input; toggling resets fault latch and initiates startup sequence |
| SW (Pins 23–26) | Boost switch drain | Connects internally to 50 V/2 A MOSFET; all four pins must be tied together and routed to inductor |
| STR0–STR5 | LED string current sinks | Each sinks up to 30 mA; cathodes of LED strings connect here; open-circuit/short-circuit monitored per pin |
| AD0 | I²C address selector | Configures slave address as 0x60, 0x61, 0x62, or 0x63 - enables multi-driver I²C bus sharing |
| FLTB | Fault indicator | Open-drain active-low output asserting on any detected fault; requires external pull-up |
| ILED | Analog current reference | Sets full-scale sink current via resistor to GND (e.g., 100 kΩ → 20 mA) |
| IADJ | Analog dimming input | 0–1.22 V input scales LED current linearly from 0% to 100% for ALS/temperature compensation |
Key Features
| Feature | Design Value |
|---|---|
| Digitally compensated 1.1 MHz boost | Eliminates external compensation network and reduces BOM count while maintaining stability over load/temperature |
| 12-bit total dimming resolution | 256-step PWM + 16-step analog adjustment enables smooth, flicker-free brightness control across 4096 levels |
| Per-string fault detection & auto-disable | Prevents thermal runaway and system-level failure by isolating faulty strings without interrupting others |
| ALS/NTC analog interfaces | Enables closed-loop ambient light or temperature compensation without MCU intervention or firmware overhead |
| Four selectable I²C addresses | Allows up to four MSL1061AV devices on a single bus - essential for RGB/RGGB backlight systems |
Applications
| Notebook PC Backlight | Medical Instrument Display |
|---|---|
Use Scenario: Driving 60 white LEDs (10 per string) in a 15.6″ LCD panel with dynamic contrast and ambient light adaptation. IC Role / Device Role / Timing Role: Primary LED current controller and boost voltage manager; regulates string current and adjusts output voltage based on worst-case string forward voltage. Use Value: ±1.5% current matching ensures uniform luminance across display area; IADJ input enables seamless ALS integration for battery-aware brightness scaling. | Use Scenario: Powering high-reliability, long-life LED backlights in portable ultrasound and patient monitor displays operating in clinical environments. IC Role / Device Role / Timing Role: Fault-resilient LED driver with open/short detection and thermal derating via NTC interface to maintain safe operating temperature under continuous use. Use Value: FLTB pin provides immediate hardware-level fault signaling to host MCU; −40°C to +85°C rating ensures operation in uncontrolled medical carts and transport cases. |
| Industrial Signage | Automotive Infotainment Display |
Use Scenario: Driving 72-LED red signage arrays (12 per string × 6 strings) in outdoor kiosks requiring high efficiency and robust overvoltage protection. IC Role / Device Role / Timing Role: High-voltage boost controller with adjustable OVP (via R8/R9) limiting output to 45.9 V to protect LEDs and rectifier under transient conditions. Use Value: Internal 50 V MOSFET and 2 A current limit eliminate need for external high-side switch; 92% peak efficiency reduces thermal load in sealed enclosures. | Use Scenario: Backlighting TFT displays in head units and digital clusters where EMC, reliability, and I²C configurability are critical. IC Role / Device Role / Timing Role: I²C-configurable LED driver supporting software-defined dimming profiles, fault logging, and synchronized PWM updates across multiple displays. Use Value: Four I²C addresses allow independent control of RGB backlight zones; 1.1 MHz switching minimizes conducted noise near CAN/FlexRay bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED string driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MSL1064AW | 24-pin TQFN, fixed I²C address (0x62), no AD0 pin, 0.65 mm pitch | Single-driver systems only; cannot share I²C bus with other MSL1064s | Select when cost sensitivity outweighs multi-device I²C flexibility and board space permits smaller footprint |
| TPS61165DRVR | Texas Instruments 6-string driver with 40 V boost, 1.2 MHz switching, but only ±3% current matching and no built-in ALS/NTC interface | Lacks analog ambient/temperature compensation; requires external op-amps or MCU for closed-loop dimming | Choose for simpler designs where ±1.5% matching and integrated sensor interfaces are not required |
Compared with MSL1061AV, MSL1064AW offers lower cost and smaller package but sacrifices I²C address flexibility and thermal pad layout compatibility; TPS61165DRVR provides competitive boost performance but lacks the precision current matching and direct analog sensor integration critical for premium backlighting.
Availability
MSL1061AV is available at Aetrix Electronics and suitable for notebook PC backlighting, medical instrumentation displays, industrial signage, and automotive infotainment systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSL1061AV 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 technical and manufacturing continuity for the MSL1061AV. The company specializes in smart, power-efficient semiconductor solutions for industrial, automotive, and consumer applications.
The MSL1061AV belongs to Microchip's high-precision LED backlight driver product line, engineered specifically for energy-efficient, fault-tolerant, and software-configurable display illumination in space-constrained and thermally demanding environments.
FAQ
What is the maximum number of LEDs the MSL1061AV can drive per string?
The MSL1061AV can drive up to 12 white LEDs per string, assuming a maximum forward voltage of 3.75 V per LED and accounting for 600 mV headroom across the current sink and ~900 mV rectifier drop. This yields 45 V available for the LED string (48 V − 0.6 V − 0.9 V), and 45 V ÷ 3.75 V = 12 LEDs. The MSL1061AV datasheet confirms this limit using Osram LW-Y3SG LEDs in its typical application circuit.
Does the MSL1061AV require external compensation components for the boost regulator?
No, the MSL1061AV features a digitally compensated current-mode boost regulator that requires no external compensation components. Its control loop is fully internal and optimized for stability across the full operating range (4.75–36 V input, −40°C to +85°C). This eliminates the need for external RC networks, simplifying layout and improving design repeatability compared to analog-compensated boost controllers.
How does the MSL1061AV handle fault conditions such as open or shorted LED strings?
The MSL1061AV continuously monitors each STR0–STR5 output for open-circuit (voltage > 0.1 V) and short-circuit (voltage < 4.4 V) faults. Upon detection, it automatically disables the affected string, asserts the FLTB pin low, and records the fault in the I²C status register. Faults are cleared by toggling EN, cycling VIN, or issuing a reset command via I²C - ensuring system-level safety without requiring external supervision.
Can the MSL1061AV operate without an I²C interface?
Yes, the MSL1061AV supports full stand-alone operation using dedicated pins: EN for global on/off, PWM for external dimming control (up to 40 kHz), ILED for analog current setting, and IADJ for ALS/NTC-based brightness scaling. This enables rapid prototyping and cost-sensitive designs where microcontroller resources or I²C bandwidth are constrained - all core functions remain accessible without serial communication.
What is the purpose of the AD0 pin on the MSL1061AV?
The AD0 pin on the MSL1061AV selects one of four I²C slave addresses (0x60, 0x61, 0x62, or 0x63) by connecting it to GND, VDD, SCL, or SDA respectively. This enables multiple MSL1061AV devices to coexist on the same I²C bus - a critical capability for RGB, RGGB, or multi-zone backlight systems. The MSL1064AW lacks this pin and has a fixed address (0x62), making AD0 a key differentiator for scalable lighting architectures.
MSL1061AV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 4.75V
- Voltage - Supply (Max):
- 36V
- Voltage - Output:
- 48V
- Current - Output / Channel:
- 30mA
- Frequency:
- 1.1MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TQFN (5x5)
MSL1061AV FAQ
1.How can I place an order for MSL1061AV through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL1061AV 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 MSL1061AV reliable?
The price and inventory of MSL1061AV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL1061AV is usually 5 days.
3.What payment methods are accepted for MSL1061AV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL1061AV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL1061AV?
MSL1061AV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL1061AV 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 MSL1061AV?
For technical support, including MSL1061AV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL1061AV requirements.
6.How does Aetrix verify that MSL1061AV is sourced from the original manufacturer or authorized distributors?
All MSL1061AV 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 MSL1061AV meets industry standards.
7.What is the process for return or replacement of MSL1061AV?
All MSL1061AV units undergo pre-shipment inspection (PSI). If there is an issue with MSL1061AV, 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 MSL1061AV part is unused and in its original packaging.
Return procedure for MSL1061AV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL1061AV Tags
-
BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
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