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Microchip Technology MSL1060AW
- Part No.:
- MSL1060AW
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 24-WQFN Exposed Pad
- Datasheet:
-
MSL1060AW.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,783
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Product details
Overview
MSL1060AW from Microchip Technology (formerly Atmel) is a 6-channel PWM LED driver with integrated 1.1MHz current-mode boost regulator, delivering up to 48V output and ±1.5% string current matching at 30mA per string. It drives up to 72 white LEDs for notebook backlighting systems requiring high-efficiency, digitally compensated constant-current control.
For engineers reviewing the MSL1060AW datasheet, MSL1060AW pinout, MSL1060AW application, or MSL1060AW equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with functional distinctions, and supply-ready availability details - all grounded in the official Microchip MSL1060 datasheet and package documentation.
Technical Context
The MSL1060AW implements a digitally compensated, fixed-frequency (1.1MHz) current-mode PWM boost controller with internal 50V/2A power MOSFET, enabling compact magnetics and low-output-ripple operation across 4.75V–36V input. Its digital control loop eliminates external compensation components while maintaining stable regulation during PWM dimming transitions.
It integrates six independent, matched current sinks (STR0–STR5), each capable of sinking up to 30mA with ≤1.5% inter-string current mismatch. The device dynamically regulates boost output voltage by monitoring the lowest-voltage string to minimize headroom loss and maximize efficiency - critical for thermal management in space-constrained backlight designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED strings | 6 independent current sinks (STR0–STR5), each configurable up to 30mA sink current |
| Boost output voltage | Up to 48V max; regulated digitally to match highest-string forward voltage + 600mV headroom |
| String current accuracy | ±1.5% matching between strings - ensures uniform brightness across multi-string displays |
| Switching frequency | 1.1MHz (±10%) - enables use of small 10µH inductors and low-ESR ceramic capacitors |
| Input voltage range | 4.75V to 36V - supports wide-range industrial and automotive supply rails without pre-regulation |
| Efficiency | Up to 92% - achieved via low-RDS(on) internal switch (0.6Ω typ) and optimized current-mode control |
| Operating temperature | −40°C to +85°C ambient - qualified for industrial instrumentation and automotive display environments |
Pinout & Package
MSL1060AW is housed in a lead-free, RoHS-compliant 24-lead TQFN package (5mm × 5mm × 0.75mm, 0.65mm pitch) with exposed thermal pad. The package supports high-power dissipation (θJA = 24.1°C/W on JEDEC-standard 2-layer PCB) and requires GND-connected exposed pad for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (24) | Main power input | Supplies boost regulator and internal LDOs; bypass with ≥1µF ceramic capacitor to GND |
| EN (23) | Enable control | Active-high logic input; toggling resets fault latch on FLTB; connect to VIN via 100kΩ for auto-start |
| PWM (7) | Digital dimming interface | Accepts 0–50kHz PWM signal; directly modulates LED current with <3.2µs rise / 14µs fall time |
| FLTB (8) | Fault reporting output | Open-drain active-low flag indicating open/shorted string or overtemperature; sinks 1mA min |
| STR0–STR5 (12–17) | LED string current sinks | Cathode-side outputs; each sinks up to 30mA; connect unused strings to GND to disable |
| OSC (9) | Oscillator frequency set | Connect 115kΩ ±1% resistor to GND to fix boost switching at 1.1MHz |
| ILED (10) | Full-scale current programming | Resistor-to-GND sets max string current (e.g., 100kΩ → 20mA; 60kΩ → 30mA) |
| IADJ (11) | Analog dimming input | 0–1.22V input scales LED current 0–100%; used for ALS or thermistor-based brightness control |
| SW (20,21) | Boost switch drain | Internal 50V/2A MOSFET output; tie both pins together to inductor and Schottky rectifier |
| OVP (18) | Overvoltage protection sense | Resistive divider input; trips at 1.28V threshold (≈45.9V boost output with R8/R9) |
Key Features
| Feature | Design Value |
|---|---|
| Digitally compensated boost control | Eliminates external compensation network; maintains stability across load, line, and temperature without tuning |
| ±1.5% string current matching | Ensures consistent luminance across 6 LED strings - critical for uniform backlighting in medical displays |
| Integrated 50V/2A power switch | Enables single-chip 48V boost solution; avoids external FET layout complexity and parasitic losses |
| ALS and temperature sensor interfaces | IADJ pin accepts analog voltage from ambient light or thermistor sensors for adaptive brightness/derating |
| Comprehensive fault detection | Auto-disables faulty strings and asserts FLTB for open-circuit, short-circuit, OVP, and die overtemperature |
| 1.1MHz fixed-frequency operation | Reduces EMI filtering burden and allows miniaturized passive components - ideal for thin-notebook designs |
Applications
| Notebook PC Backlighting | Medical Instrument Displays |
|---|---|
|
Use Scenario: Driving 60–72 white LEDs in ultra-thin laptop LCD backlights with dynamic contrast control. IC Role / Device Role / Timing Role: Primary LED current controller and boost power manager; regulates string current and adapts output voltage per string Vf. Use Value: ±1.5% current matching prevents visible banding; 1.1MHz switching enables <1mm board height with 10µH inductor. |
Use Scenario: Illuminating high-reliability diagnostic monitors in ultrasound and patient monitors where color fidelity and flicker-free operation are mandatory. IC Role / Device Role / Timing Role: Constant-current LED driver with fault-safe shutdown; FLTB alerts host MCU of open-string failure during operation. Use Value: Automatic string disable preserves partial illumination; −40°C to +85°C rating ensures operation in sterilized or cold-storage environments. |
| Industrial Signage | Automotive AV Displays |
|
Use Scenario: Powering large-area RGB or monochrome LED panels in factory floor signage with variable ambient lighting. IC Role / Device Role / Timing Role: High-efficiency boost+current-sink driver supporting analog (IADJ) and PWM dimming for daylight/hourly brightness adaptation. Use Value: IADJ interface enables seamless integration with photodiode-based ALS; 36V max input accommodates 24V industrial rails. |
Use Scenario: Backlighting infotainment and cluster displays in vehicles where EMI, thermal stress, and long service life are critical. IC Role / Device Role / Timing Role: Automotive-grade LED driver with built-in OVP, thermal shutdown (135°C), and robust fault reporting via FLTB. Use Value: 92% peak efficiency reduces heat buildup in sealed enclosures; 48V boost supports high-Vf blue/white LEDs common in modern automotive displays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED string driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ3367-AEC1 | 6-channel, 40V boost, 2.2MHz switching, AEC-Q100 Grade 1 qualified; no IADJ analog dimming input | Targeted specifically for automotive displays; lacks ambient light/temperature analog interface | Select when AEC-Q100 compliance and higher switching frequency are required, and analog dimming is not needed |
| LM3409QMHX/NOPB | Single-channel, external-FET LED controller; supports up to 60V, but requires external MOSFET, compensation, and current sensing | Requires full discrete boost stage design; suitable for custom high-power or multi-color architectures | Select when system-level flexibility (e.g., >30mA/string, >48V, or non-standard topologies) outweighs integration benefits |
Compared with MSL1060AW, MPQ3367-AEC1 offers automotive qualification and faster switching but removes analog dimming capability, while LM3409QMHX/NOPB trades integration for design flexibility - making MSL1060AW optimal for cost-sensitive, space-constrained, analog-dimming-enabled industrial and medical backlight systems.
Availability
MSL1060AW is available at Aetrix Electronics and suitable for notebook PC backlighting, medical instrumentation displays, industrial signage, and automotive AV displays requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MSL1060AW 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 product support, documentation, and manufacturing continuity for the MSL1060 family.
The MSL1060AW belongs to Microchip's high-accuracy LED backlight driver product line, engineered for display applications demanding tight current matching, integrated power conversion, and robust fault handling in compact form factors.
FAQ
What is the maximum number of LEDs the MSL1060AW can drive?
The MSL1060AW can drive up to 72 white LEDs (6 strings × 12 LEDs per string) at 30mA, assuming typical forward voltage ≤3.75V per LED. This is derived from its 48V boost limit minus 600mV current-sink headroom and rectifier drop, yielding ~45V usable string voltage. The MSL1060AW datasheet confirms this configuration delivers up to 8W total LED power in standard backlight implementations.
Does the MSL1060AW support analog dimming, and how is it implemented?
Yes, the MSL1060AW supports analog dimming via its IADJ pin (Pin 11), which accepts a 0–1.22V input to scale LED string current linearly from 0% to 100%. This enables direct interfacing with ambient light sensors (ALS) or thermistors for automatic brightness adjustment or temperature-based current derating - a feature explicitly documented in the MSL1060AW datasheet Section 8.3 and Figure 9.
What package type and thermal characteristics does the MSL1060AW use?
The MSL1060AW uses a 24-lead, 5mm × 5mm × 0.75mm TQFN package with 0.65mm lead pitch and exposed thermal pad. Its thermal resistance is θJA = 24.1°C/W (JEDEC JEP149/JESD51-12, two-layer PCB), enabling 2286mW continuous power dissipation at 70°C ambient. The exposed pad must be soldered to GND for optimal thermal and electrical performance, as specified in the MSL1060AW Package Drawing and Absolute Maximum Ratings table.
How does the MSL1060AW handle LED string faults, and what is the role of FLTB?
The MSL1060AW detects open-circuit, short-circuit, and overtemperature faults per string and asserts the open-drain FLTB pin (Pin 8) low to signal system-level fault condition. Upon detection, it automatically disables the faulty string while maintaining operation of remaining strings. FLTB remains low until EN is cycled or input power is reset - behavior confirmed in Sections 7.3 and 17 of the MSL1060AW datasheet and validated in Typical Operating Characteristics Figure 12.
Can the MSL1060AW operate without external resistors, and which ones are mandatory?
No - the MSL1060AW requires three external resistors for basic operation: OSC (115kΩ ±1% to GND) sets 1.1MHz switching frequency; ILED (e.g., 100kΩ to GND) programs full-scale current; and OVP divider (R8/R9) configures overvoltage protection threshold. These are mandatory per the datasheet's "Quick Start Guide" and "Typical Application Circuit" (Figure 16). Omitting any invalidates regulation, timing, or safety functionality.
MSL1060AW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-WQFN 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:
- 24-TQFN (5x5)
MSL1060AW FAQ
1.How can I place an order for MSL1060AW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL1060AW 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 MSL1060AW reliable?
The price and inventory of MSL1060AW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL1060AW is usually 5 days.
3.What payment methods are accepted for MSL1060AW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL1060AW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL1060AW?
MSL1060AW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL1060AW 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 MSL1060AW?
For technical support, including MSL1060AW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL1060AW requirements.
6.How does Aetrix verify that MSL1060AW is sourced from the original manufacturer or authorized distributors?
All MSL1060AW 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 MSL1060AW meets industry standards.
7.What is the process for return or replacement of MSL1060AW?
All MSL1060AW units undergo pre-shipment inspection (PSI). If there is an issue with MSL1060AW, 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 MSL1060AW part is unused and in its original packaging.
Return procedure for MSL1060AW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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