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Microchip Technology MSL1064AW
- Part No.:
- MSL1064AW
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 24-WQFN Exposed Pad
- Datasheet:
-
MSL1064AW.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
MSL1064AW 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 24-pin TQFN package. It delivers up to 30 mA per string at up to 48 V output for 8 W backlighting in notebook PCs and medical instrumentation.
For engineers reviewing the MSL1064AW datasheet, MSL1064AW pinout, MSL1064AW application, or MSL1064AW equivalent, key selection considerations include its fixed I²C slave address (0x62), 24-pin 5×5 mm TQFN-24 package with 0.65 mm pitch, 4.75–36 V input range, 1.1 MHz boost switching frequency, and support for both I²C-controlled and standalone PWM/ILED dimming modes.
Technical Context
The MSL1064AW integrates a current-mode PWM boost regulator with a 50 V internal MOSFET switch and no external compensation required. Its digital control loop maintains output voltage regulation across six independent current sinks while automatically adapting to the lowest-voltage LED string to minimize power loss.
It supports dual dimming paths: 8-bit PWM (256:1 range) and 4-bit analog (16:1 range) via I²C for 12-bit combined resolution, plus direct analog dimming via IADJ (0–1.22 V) and logic-level PWM input (up to 50 kHz). Fault management includes per-string open-circuit and short-circuit detection with active-low FLTB reporting.
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 external pre-regulation |
| Boost Output Voltage | Up to 48 V - enables driving up to 12 white LEDs (3.75 V max VF) per string with 600 mV headroom |
| LED String Current | Adjustable up to 30 mA per string - set by external resistor (e.g., 66.7 kΩ for 30 mA) on ILED pin |
| Current Matching | ±1.5% max mismatch - ensures uniform brightness across all 6 strings without manual calibration |
| Switching Frequency | 1.1 MHz (±10%) - allows use of small 10 µH inductors and low-ESR ceramic capacitors |
| I²C Interface Speed | Up to 1 MHz - supports fast register access for real-time dimming and fault status polling |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive cabin-adjacent display applications |
Pinout & Package
MSL1064AW is housed in a lead-free, halogen-free, RoHS-compliant 5 mm × 5 mm × 0.75 mm TQFN-24 package with 0.65 mm pin pitch and exposed thermal pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Supplies internal regulators and boost converter; bypass with ≥1 µF ceramic capacitor to GND |
| EN | Enable control | Active-high logic input; toggling resets fault latch; connect to VIN via 100 kΩ for auto-start |
| SW | Boost switch drain | Two parallel pins (20, 21); connect together to inductor and Schottky rectifier anode |
| STR0–STR5 | LED string current sinks | 6 dedicated cathode-sink outputs; each supports up to 30 mA; connect unused strings to GND |
| SDA / SCL | I²C bidirectional data / clock | Supports 1 MHz operation; internal 10 pF capacitance; requires pull-ups per I²C bus design rules |
| PWM | External dimming control | Accepts 0–50 kHz logic-level PWM signal; directly modulates LED current without I²C interaction |
| FLTB | Fault indicator | Open-drain active-low output; asserts on open/short string or overtemperature; cleared by EN toggle or I²C reset |
| ILED | Full-scale current reference | Connect resistor to GND to set max sink current (e.g., 100 kΩ = 20 mA; 66.7 kΩ = 30 mA) |
| IADJ | Analog dimming input | 0–1.22 V linear control of LED current; used with ALS or thermistor for ambient/thermal compensation |
| OVP | Overvoltage protection sense | Resistive divider input; trips at 1.28 V threshold (e.g., 45.9 V boost output with R8/R9) |
| OSC | Oscillator frequency setting | Connect 115 kΩ ±1% resistor to GND to fix boost switching at 1.1 MHz and internal PWM at 11 MHz |
Key Features
| Feature | Design Value |
|---|---|
| Digitally compensated boost regulator | Eliminates external compensation components and tuning; stable across temperature and load |
| 12-bit combined dimming resolution | 256-step PWM + 16-step analog = precise luminance control for HDR and flicker-sensitive displays |
| Per-string fault detection & auto-disable | Isolates failed LED strings without affecting others; prevents thermal runaway and system shutdown |
| Standalone operation mode | Full functionality without I²C - uses EN, PWM, ILED, and IADJ pins for hardware-only control |
| ALS/NTC interface support | Enables closed-loop brightness/thermal management using ambient light sensors or thermistors |
Applications
| Notebook PC Backlighting | Medical Instrument Displays |
|---|---|
Use Scenario: Driving 60 white LEDs (10 per string) in a 15.6″ LCD panel with dynamic contrast and ambient-adaptive brightness. IC Role / Device Role / Timing Role: Primary LED current controller and boost power manager; regulates string current and output voltage synchronously. Use Value: ±1.5% current matching ensures uniform screen luminance; 1.1 MHz switching minimizes EMI near sensitive analog front-ends. | Use Scenario: Illuminating high-reliability surgical monitor backlights requiring >50,000-hour lifetime and fail-safe fault reporting. IC Role / Device Role / Timing Role: Fault-aware LED driver with automatic string disable and FLTB alert to host MCU for diagnostic logging. Use Value: Open/short detection per string prevents single-point failure from compromising display integrity; −40°C to +85°C rating supports sterilization cycles. |
| Industrial Signage | Automotive AV Displays |
Use Scenario: Powering 72-LED RGB signage modules where color consistency depends on per-channel current accuracy. IC Role / Device Role / Timing Role: Dedicated white LED driver per color channel (e.g., one MSL1064AW per white segment); not used for mixed-color strings. Use Value: Fixed I²C address simplifies multi-driver daisy-chaining in large-format displays; 48 V capability supports long LED strings with minimal voltage drop. | Use Scenario: Backlighting infotainment center TFTs in vehicles with wide input voltage (9–16 V battery) and thermal derating needs. IC Role / Device Role / Timing Role: LED driver with NTC-based thermal foldback via IADJ pin to reduce current above 70°C. Use Value: IADJ analog dimming enables smooth, stepless thermal derating without PWM artifacts; 36 V max VIN accommodates load-dump transients. |
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 |
|---|---|---|---|
| MPQ3367-AEC1 | Automotive-grade AEC-Q100 qualified; 40 V max boost; 6-string, 150 mA total; I²C + analog dimming | Designed for automotive cabin displays with stricter qualification; lacks standalone PWM pin mode | Choose MPQ3367-AEC1 only when AEC-Q100 compliance is mandatory and total current >30 mA/string is needed |
| ISL97693 | 6-string, 40 V boost; ±1.2% current matching; 1.2 MHz switching; SPI interface instead of I²C | Requires SPI host; no standalone PWM input; different register map and fault reporting structure | Choose ISL97693 if existing firmware uses SPI peripherals and tighter ±1.2% matching is critical |
Compared with MSL1064AW, MPQ3367-AEC1 adds automotive qualification but removes standalone PWM control, while ISL97693 offers slightly better current matching and higher switching frequency but replaces I²C with SPI-requiring firmware and layout changes.
Availability
MSL1064AW is available at Aetrix Electronics and suitable for notebook PC backlighting, medical instrument displays, and industrial signage requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for MSL1064AW 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 its high-performance analog and LED driver portfolio with full documentation and long-term availability.
The MSL1064AW belongs to Microchip's legacy Atmel LED driver product line, designed specifically for efficient, fault-resilient backlighting in space-constrained, thermally demanding applications such as portable displays and industrial HMI.
FAQ
What is the I²C slave address of the MSL1064AW?
The MSL1064AW has a fixed I²C slave address of 0x62 (7-bit) / 0xC4 (8-bit write) / 0xC5 (8-bit read). Unlike the MSL1061, it does not support AD0 pin address selection. This simplifies single-driver designs but requires bus arbitration in multi-driver systems. The MSL1064AW address is confirmed in the datasheet Table 1 and Pin Descriptions section.
Can the MSL1064AW operate without an I²C interface?
Yes, the MSL1064AW supports full standalone operation using EN, PWM, ILED, and IADJ pins. Global on/off is controlled by EN; LED brightness is adjusted via PWM pin (0–50 kHz) or IADJ voltage (0–1.22 V); full-scale current is set by ILED resistor. No microcontroller or I²C bus is required, making the MSL1064AW suitable for cost-sensitive or resource-constrained designs.
What is the maximum number of LEDs per string the MSL1064AW can drive?
The MSL1064AW can drive up to 12 white LEDs per string, assuming a maximum forward voltage of 3.75 V per LED. This is derived from its 48 V max boost output minus 600 mV current-sink headroom and ~900 mV rectifier drop, leaving ~45 V for the LED string. Using 3.75 V LEDs yields 45 V ÷ 3.75 V = 12 LEDs. This limit is explicitly stated in the Quick Start Guide and verified in the Absolute Maximum Ratings table.
Does the MSL1064AW support thermal derating?
Yes, the MSL1064AW supports analog thermal derating via the IADJ pin. Applying a voltage between 0 V and 1.22 V linearly scales LED current from 0% to 100%. When paired with an NTC thermistor network, this enables automatic current reduction as temperature rises-critical for maintaining LED lifetime and color stability. The IADJ function is documented in the Pin Descriptions and Application Information sections.
What package type and dimensions does the MSL1064AW use?
The MSL1064AW uses a 24-pin, 5 mm × 5 mm × 0.75 mm TQFN package with 0.65 mm pin pitch and exposed thermal pad. This is confirmed in the Ordering Information table and Figure 2 (24-pin TQFN Package Dimensions). The package is lead-free, halogen-free, and RoHS-compliant, with IPC-2221A-2003 compliance verified for 100 V isolation with board coating.
MSL1064AW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-WQFN Exposed Pad
- Packaging:
- Tray
- 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)
MSL1064AW FAQ
1.How can I place an order for MSL1064AW through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL1064AW 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 MSL1064AW reliable?
The price and inventory of MSL1064AW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL1064AW is usually 5 days.
3.What payment methods are accepted for MSL1064AW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL1064AW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL1064AW?
MSL1064AW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL1064AW 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 MSL1064AW?
For technical support, including MSL1064AW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL1064AW requirements.
6.How does Aetrix verify that MSL1064AW is sourced from the original manufacturer or authorized distributors?
All MSL1064AW 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 MSL1064AW meets industry standards.
7.What is the process for return or replacement of MSL1064AW?
All MSL1064AW units undergo pre-shipment inspection (PSI). If there is an issue with MSL1064AW, 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 MSL1064AW part is unused and in its original packaging.
Return procedure for MSL1064AW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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