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Microchip Technology MSL1061AV-R
- Part No.:
- MSL1061AV-R
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 28-WFQFN Exposed Pad
- Datasheet:
-
MSL1061AV-R.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 28TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,403
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Product details
Overview
MSL1061AV-R 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 30 mA per string sink capability - designed for high-efficiency backlighting in notebook PCs, medical displays, and signage.
For engineers reviewing the MSL1061AV-R datasheet, MSL1061AV-R pinout, MSL1061AV-R application, or MSL1061AV-R equivalent, key selection considerations include its 28-pin 5×5 mm TQFN package, 4.75–36 V input range, 48 V max boost output, I²C slave address selectability via AD0, and dual dimming control (256:1 PWM + 16:1 analog = 12-bit total resolution).
Technical Context
The MSL1061AV-R integrates a current-mode PWM boost controller with a 50 V internal MOSFET switch and no external compensation required. Its digital control loop maintains regulation across six independent current sinks (STR0–STR5), dynamically adjusting boost output voltage to match the lowest-string forward voltage while preserving ±1.5% current matching.
It supports three operational modes: full I²C control (up to 1 MHz), standalone logic control (EN, PWM, ILED, IADJ), or hybrid use - with fault reporting via FLTB pin and status register, open/short detection per string, and programmable overvoltage protection set by external resistive divider on OVP pin.
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 - enables driving up to 12 white LEDs (3.75 V VF max) per string |
| Max LED Current per String | 30 mA - set by ILED pin resistor; adjustable down to 0 mA via I²C or analog input |
| Current Matching Accuracy | ±1.5% - ensures uniform brightness across all 6 strings without external calibration |
| Switching Frequency | 1.1 MHz - allows compact 10 µH inductor and low-profile ceramic output capacitors |
| I²C Interface Speed | Up to 1 MHz - enables fast configuration and real-time dimming updates in system firmware |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-adjacent display applications |
Pinout & Package
MSL1061AV-R is housed in a lead-free, halogen-free, RoHS-compliant 28-pin TQFN package (5 mm × 5 mm × 0.75 mm, 0.5 mm pitch) with exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Supplies boost regulator and internal LDOs; bypass with ≥1 µF ceramic capacitor to GND |
| VCC | 6 V internal LDO output | Powers internal MOSFET gate driver; requires ≥10 µF ceramic or tantalum + 1 µF ceramic bypass |
| VDD | 2.9 V internal LDO output | Powers digital logic; bypass with ≥4.7 µF ceramic capacitor to GND |
| STR0–STR5 | LED string current sinks | Each sinks up to 30 mA; cathodes of LED strings connect here; open-circuit/short-circuit fault detection per pin |
| AD0 | I²C slave address select | Configures one of four I²C addresses (0x60–0x63); not present on MSL1064 |
| SDA / SCL | I²C bidirectional data/clock | Supports 1 MHz operation; includes internal noise filters (<50 ns) |
| PWM | External dimming control | Accepts 0–40 kHz logic-level PWM signal for direct LED current modulation without I²C |
| FLTB | Fault alert output | Active-low open-drain output indicating any string fault; latched until reset via EN toggle or I²C |
| ILED | Full-scale current set | Resistor-to-GND sets max sink current (e.g., 100 kΩ = 20 mA; 66.7 kΩ = 30 mA) |
| IADJ | Analog dimming input | 0–1.22 V input linearly scales LED current from 0% to 100%; used with ALS or thermistor |
| OVP | Overvoltage protection sense | Resistive divider from boost output sets trip point at 1.28 V threshold (e.g., 45.9 V typical) |
| SW | Boost switch drain | Four paralleled pins (23–26) connect to inductor and rectifier; rated for 50 V, ±3 A peak |
| EN | Enable input | Active-high; toggling resets FLTB latch; connect to VIN via 100 kΩ for auto-start |
Key Features
| Feature | Design Value |
|---|---|
| Digitally compensated 1.1 MHz boost | Eliminates external compensation components and reduces EMI-sensitive layout area |
| ±1.5% string current matching | Enables uniform luminance in multi-string LCD backlights without per-string trimming |
| 12-bit combined dimming resolution | 256-step PWM + 16-step analog = precise brightness control across ambient light and temperature gradients |
| Per-string fault detection & auto-disable | Prevents thermal runaway and system-level failure when one LED string opens or shorts |
| ALS/NTC interface support | Direct analog inputs (IADJ) enable closed-loop brightness/temperature management without MCU intervention |
| Four selectable I²C addresses | Allows up to four MSL1061AV-R devices on same bus - essential for RGB/RGGB backlight systems |
Applications
| Medical Instrument Displays | Notebook PC Backlighting |
|---|---|
Use Scenario: High-reliability, flicker-free backlight for diagnostic monitors requiring stable luminance over 10+ year service life. IC Role / Device Role / Timing Role: 6-string LED driver with integrated boost, current balancing, and fault reporting - acts as primary backlight power and control unit. Use Value: ±1.5% current matching ensures consistent color temperature across display zones; thermal derating via IADJ extends LED lifetime under continuous operation. | Use Scenario: Slim-profile, energy-efficient backlight for 13–15 inch LCD panels with dynamic dimming based on content and ambient light. IC Role / Device Role / Timing Role: Standalone LED driver managing six parallel LED strings with I²C-configurable PWM dimming and ALS feedback. Use Value: 1.1 MHz switching enables <1 mm height inductor; 256:1 internal PWM range supports smooth 0.01–100% brightness scaling without visible steps. |
| Industrial Signage | Automotive AV Displays |
Use Scenario: Outdoor-rated digital signage with wide temperature operation and robust fault handling in unattended environments. IC Role / Device Role / Timing Role: LED string controller with OVP, open/short detection, and latchable FLTB output for remote fault monitoring. Use Value: 48 V boost output drives long LED strings (e.g., 12× white LEDs); −40°C to +85°C rating ensures reliability in non-climate-controlled enclosures. | Use Scenario: Infotainment display backlight in passenger cabin with EMI-sensitive audio circuits and thermal constraints. IC Role / Device Role / Timing Role: Low-noise, high-efficiency LED driver using CCM boost operation and spread-spectrum-capable 1.1 MHz clock. Use Value: Digitally compensated architecture minimizes conducted EMI; FLTB pin integration simplifies fault signaling to vehicle CAN gateway without extra logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-string LED 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 vs. MSL1061AV-R's 0.5 mm | Single-driver systems only; cannot share I²C bus with other MSL1064 units | Select when cost sensitivity outweighs multi-device I²C flexibility and board space permits larger pitch layout |
| TPS61196RGER | Texas Instruments part: 6-string, 40 V boost, ±2% current matching, 2.2 MHz switching, no AD0 address select | Lacks I²C address configurability; uses different fault reporting scheme (no FLTB pin) | Choose if higher switching frequency and TI ecosystem support are prioritized over ±1.5% matching and address flexibility |
Compared with MSL1064AW, MSL1061AV-R offers I²C address selectability for multi-driver systems but requires finer-pitch PCB assembly; versus TPS61196RGER, it delivers tighter current matching and integrated fault latching, at the expense of slightly lower switching frequency and vendor-specific toolchain.
Availability
MSL1061AV-R is available at Aetrix Electronics and suitable for notebook PC backlighting, medical instrumentation displays, and industrial signage requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSL1061AV-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 continues to support, manufacture, and qualify the former Atmel LED driver portfolio including the MSL1061 series.
The MSL1061 product line was designed specifically for high-efficiency, multi-string LED backlighting in space-constrained, thermally demanding applications - emphasizing precision current matching, integrated protection, and flexible digital/analog control.
FAQ
What is the maximum number of LEDs the MSL1061AV-R can drive per string?
The MSL1061AV-R 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 - resulting in a usable 45 V for the LED string within the 48 V boost limit. This is confirmed in the datasheet's Quick Start Guide and Typical Application Circuit sections.
Does the MSL1061AV-R require external compensation components for the boost regulator?
No, the MSL1061AV-R uses a digitally compensated current-mode boost regulator that requires no external compensation components. The internal digital control loop automatically stabilizes the boost output, eliminating the need for external RC networks or type-II/type-III compensators - a key design simplification highlighted in the General Description and Key Features sections.
How does the MSL1061AV-R handle LED string faults such as open or short circuits?
The MSL1061AV-R detects open-circuit and short-circuit conditions on each STR0–STR5 pin independently. Upon detection, it automatically disables the faulty string, asserts the FLTB pin low, and stores fault status in an I²C-accessible register. Faults remain latched until cleared by toggling the EN pin, cycling VIN, or issuing a reset command via I²C - ensuring fail-safe operation without MCU polling.
Can the MSL1061AV-R operate without an I²C interface?
Yes, the MSL1061AV-R supports fully standalone operation using dedicated logic pins: EN for global on/off, PWM for external dimming, ILED for full-scale current setting, and IADJ for analog brightness control. This mode eliminates I²C dependency while retaining fault reporting via FLTB and basic dimming - ideal for cost-sensitive or resource-constrained designs where firmware overhead must be minimized.
What is the purpose of the AD0 pin on the MSL1061AV-R?
The AD0 pin on the MSL1061AV-R 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-R devices to coexist on the same I²C bus - a critical feature for RGB or RGGB backlight systems where separate drivers control different LED color channels. The MSL1064 lacks this pin and has a fixed address (0x62).
MSL1061AV-R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-R FAQ
1.How can I place an order for MSL1061AV-R through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL1061AV-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 MSL1061AV-R reliable?
The price and inventory of MSL1061AV-R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL1061AV-R is usually 5 days.
3.What payment methods are accepted for MSL1061AV-R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL1061AV-R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL1061AV-R?
MSL1061AV-R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL1061AV-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 MSL1061AV-R?
For technical support, including MSL1061AV-R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL1061AV-R requirements.
6.How does Aetrix verify that MSL1061AV-R is sourced from the original manufacturer or authorized distributors?
All MSL1061AV-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 MSL1061AV-R meets industry standards.
7.What is the process for return or replacement of MSL1061AV-R?
All MSL1061AV-R units undergo pre-shipment inspection (PSI). If there is an issue with MSL1061AV-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 MSL1061AV-R part is unused and in its original packaging.
Return procedure for MSL1061AV-R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL1061AV-R Tags
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