My Inquiry
My Account
Microchip Technology MSL1064AW-R
- Part No.:
- MSL1064AW-R
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 24-WQFN Exposed Pad
- Datasheet:
-
MSL1064AW-R.pdf
- Description:
- IC LED DRV RGLTR PWM 30MA 24TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,792
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MSL1064AW-R from Microchip Technology (formerly Atmel) is a 6-string PWM LED driver IC with integrated 48V, 1.1MHz current-mode boost regulator, ±1.5% string-to-string current matching, I²C/SMBus interface (fixed 0x62 address), and 24-pin 5×5mm TQFN package. It delivers up to 30mA per string for backlighting up to 72 white LEDs at 8W in notebook PC and industrial display systems.
For engineers reviewing the MSL1064AW-R datasheet, MSL1064AW-R pinout, MSL1064AW-R application, or MSL1064AW-R equivalent, key selection considerations include its fixed I²C address (no AD0 pin), 24-pin TQFN layout, 4.75–36V input range, digitally compensated boost architecture requiring no external compensation, and dual dimming control via I²C (12-bit combined PWM + analog) or standalone PWM/ILED/IADJ pins.
Technical Context
The MSL1064AW-R implements a current-mode PWM boost controller with internal 50V/2A MOSFET switch, operating at 1.1MHz to minimize inductor and capacitor size while maintaining >92% efficiency and low output ripple. Its digital control loop eliminates external compensation components and dynamically regulates boost output voltage to match the lowest-voltage LED string.
It integrates six independent current-sink outputs (STR0–STR5), each supporting up to 30mA with ≤±1.5% matching across strings. Fault management includes per-string open-circuit and short-circuit detection, automatic fault-string disable, and active-low FLTB reporting-accessible either via dedicated pin or I²C status register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.75V to 36V - supports wide-range DC supplies including automotive battery and industrial 24V rails without pre-regulation. |
| Boost Output Voltage | Up to 48V - enables driving up to 12 white LEDs (3.75V VF max) per string with 600mV headroom. |
| LED String Current | Adjustable 0–30mA per string - set by external ILED resistor (e.g., 100kΩ = 20mA); matched within ±1.5% across all six strings. |
| Switching Frequency | 1.1MHz - allows use of compact 10µH inductors and ceramic output capacitors; fixed via 115kΩ OSC resistor. |
| I²C Interface | Fixed slave address 0x62 - simplifies single-driver designs; supports up to 1MHz clock rate with SMBus compatibility. |
| Operating Temperature | −40°C to +85°C - qualified for industrial and automotive display environments without derating. |
| Package | 24-pin TQFN, 5×5×0.75mm, 0.65mm pitch - RoHS-compliant, halogen-free, with exposed thermal pad for PCB heat dissipation. |
Pinout & Package
MSL1064AW-R uses a lead-free, halogen-free 24-pin TQFN package (5mm × 5mm × 0.75mm, 0.65mm pitch) with exposed thermal pad. Pin assignments are validated per Atmel/Microchip datasheet Figure 2 and Table 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 24) | Main power input | Supplies boost regulator and internal LDOs; accepts 4.75–36V; bypass with ≥1µF ceramic to GND. |
| EN (Pin 23) | Enable control | Active-high logic input; toggling EN resets fault latch; connect to VIN via 100kΩ for auto-start. |
| SW (Pins 20,21) | Boost switch drain | Internal 50V/2A MOSFET drain nodes; must be tied together and connected to inductor and rectifier anode. |
| STR0–STR5 (Pins 17–12) | LED string sinks | Current-sink outputs for cathode-side LED string connection; each supports 0–30mA with <±1.5% matching. |
| FLTB (Pin 8) | Fault indicator | Open-drain active-low output asserting on open/short-string or over-temperature; requires pull-up. |
| I²C SDA/SCL (Pins 5,6) | Serial interface | Standard I²C bidirectional data/clock; support 1MHz operation; internal 10pF capacitance; filtered against <50ns noise. |
| ILED (Pin 10) | Analog current set | Sets full-scale sink current via resistor to GND (e.g., 100kΩ → 20mA); referenced to 1.22V internal DAC. |
| IADJ (Pin 11) | Analog dimming input | 0–1.22V linear control of LED current (0–100%); connects to ambient light sensor or thermistor for adaptive brightness. |
| PWM (Pin 7) | External dimming | Accepts 0–40kHz logic-level PWM signal for direct string current modulation without I²C. |
| OVP (Pin 18) | Overvoltage sense | Resistive divider input (1.28V threshold) to limit boost output to safe level (e.g., 45.9V for 10-LED strings). |
| OSC (Pin 9) | Oscillator control | Connects to GND via 115kΩ ±1% resistor to fix internal oscillator at 11MHz and boost frequency at 1.1MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Digitally compensated boost regulator | Eliminates external compensation network; maintains stability across line/load/temperature with no tuning required. |
| 12-bit total dimming resolution | 256-step PWM + 16-step analog adjustment via I²C yields fine-grained brightness control for flicker-free displays. |
| Per-string fault detection & auto-disable | Identifies open/short faults on STR0–STR5 individually and disables only the faulty string-preserving backlight uniformity. |
| ALS and NTC interfaces | IADJ pin accepts analog voltage from ambient light sensor or thermistor to enable automatic brightness/thermal derating. |
| Standalone operation mode | Full functionality (dimming, enable, fault reporting) available without I²C using EN, PWM, ILED, and FLTB pins-reducing firmware overhead. |
Applications
| Medical Instrument Displays | Industrial HMI Panels |
|---|---|
Use Scenario: Backlighting high-reliability LCDs in surgical monitors and diagnostic equipment where consistent luminance and long service life are critical. IC Role / Device Role / Timing Role: MSL1064AW-R acts as the primary LED current controller and boost power source, regulating six independent LED strings with ±1.5% matching to prevent visible brightness gradients. Use Value: Enables 8W backlight operation at >92% efficiency with built-in OVP and thermal shutdown-meeting IEC 60601 safety margins without external protection circuitry. | Use Scenario: Illuminating ruggedized touchscreens in factory automation panels exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: MSL1064AW-R serves as the fault-resilient LED driver, using FLTB pin for real-time fault signaling to PLC controllers and IADJ for temperature-based current derating. Use Value: Per-string open/short detection and automatic disable preserve partial backlight functionality during field failures-reducing downtime and maintenance cost. |
| Notebook PC Backlighting | Traffic Signage Modules |
Use Scenario: Driving 60–72 white LEDs in ultra-thin laptop displays requiring minimal board area and low acoustic noise. IC Role / Device Role / Timing Role: MSL1064AW-R integrates boost regulation and 6-channel current sinking in one 5×5mm package, replacing discrete boost + multiple current sources. Use Value: 1.1MHz switching frequency enables use of tiny 10µH inductors and ceramic caps-cutting solution size by >40% vs. 500kHz alternatives. | Use Scenario: Powering red LED arrays in outdoor traffic signals where reliability under thermal cycling and voltage transients is mandatory. IC Role / Device Role / Timing Role: MSL1064AW-R operates as a constant-current source for 6×18 red LED strings (2.5V VF), leveraging its 48V boost capability and −40°C to +85°C rating. Use Value: Internal 50V MOSFET and adjustable OVP (via R8/R9) eliminate need for external TVS/clamping-reducing BOM count and improving MTBF. |
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 |
|---|---|---|---|
| IS31FL3728-QFLS4-TR | 18-channel, 40mA/channel, I²C-programmable, no integrated boost; requires external 48V supply | Designed for RGB signage with per-LED PWM; lacks boost, OVP, and fault reporting | Choose IS31FL3728 when driving pre-regulated LED strings with complex color mixing; not suitable for single-supply boost applications. |
| LM3409MY/NOPB | Single-channel, 1.5A buck-boost LED controller; external FETs, no integrated current sinks or I²C | Targeted at high-power single-string automotive lighting; requires full external power stage and MCU for multi-string coordination | Choose LM3409 when designing custom multi-string solutions with higher current (>30mA) or non-standard topologies; adds design complexity and footprint. |
Compared with IS31FL3728-QFLS4-TR and LM3409MY/NOPB, the MSL1064AW-R uniquely integrates boost regulation, six matched current sinks, I²C control, and comprehensive fault handling in a single 5×5mm package-reducing system-level component count, layout effort, and qualification risk for 6-string backlighting.
Availability
MSL1064AW-R is available at Aetrix Electronics and suitable for notebook PC backlighting, medical display illumination, and industrial HMI panel designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MSL1064AW-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 manufacture and support the MSL106x family of high-efficiency LED drivers.
The MSL1064AW-R belongs to Microchip's LED backlight driver product line, engineered specifically for space-constrained, high-reliability display applications demanding precise current matching, integrated power conversion, and robust fault management.
FAQ
What is the maximum number of LEDs the MSL1064AW-R can drive per string?
The MSL1064AW-R supports up to 12 white LEDs per string, calculated from its 48V maximum boost output minus 600mV current-sink headroom and ~900mV rectifier drop, leaving ~45V for the LED string. Using LEDs with a maximum forward voltage of 3.75V (e.g., 3.75V × 12 = 45V), the MSL1064AW-R achieves full utilization. This is confirmed in the datasheet's Quick Start Guide and Electrical Characteristics section.
Does the MSL1064AW-R require external compensation components for the boost regulator?
No, the MSL1064AW-R 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 input voltage, load, and temperature variations-verified in the General Description and Key Features sections of the official datasheet.
How does the MSL1064AW-R handle LED string faults such as open or short circuits?
The MSL1064AW-R detects open-circuit (threshold <0.1V) and short-circuit (threshold >4.4V) conditions on each STR0–STR5 output independently. Upon detection, it automatically disables the faulty string and asserts the FLTB pin low. Fault status is also readable via I²C status register, and reset is possible via EN toggle, power cycle, or I²C command-detailed in the Pin Descriptions and Applications sections.
Can the MSL1064AW-R operate without an I²C interface?
Yes, the MSL1064AW-R supports full standalone operation: EN pin controls global on/off, PWM pin accepts external 0–40kHz dimming signals, ILED sets full-scale current, and IADJ enables analog dimming from ALS/NTC sensors. FLTB provides hardware fault signaling-all without I²C. This dual-mode capability is explicitly documented in Table 2 ("Capabilities With and Without Using the Serial Interface").
What is the purpose of the OSC pin on the MSL1064AW-R, and what resistor value is required?
OSC pin sets the internal oscillator frequency by connecting a precision resistor to GND. A 115kΩ ±1% resistor is required to achieve the specified 1.1MHz boost switching frequency and 11MHz internal PWM clock-critical for optimal efficiency and noise performance. Deviation invalidates guaranteed specifications, as stated in the Application Information and Electrical Characteristics sections.
MSL1064AW-R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-WQFN 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:
- 24-TQFN (5x5)
MSL1064AW-R FAQ
1.How can I place an order for MSL1064AW-R through Aetrix?
Please submit a Request for Quotation (RFQ) for MSL1064AW-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 MSL1064AW-R reliable?
The price and inventory of MSL1064AW-R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MSL1064AW-R is usually 5 days.
3.What payment methods are accepted for MSL1064AW-R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MSL1064AW-R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MSL1064AW-R?
MSL1064AW-R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MSL1064AW-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 MSL1064AW-R?
For technical support, including MSL1064AW-R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MSL1064AW-R requirements.
6.How does Aetrix verify that MSL1064AW-R is sourced from the original manufacturer or authorized distributors?
All MSL1064AW-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 MSL1064AW-R meets industry standards.
7.What is the process for return or replacement of MSL1064AW-R?
All MSL1064AW-R units undergo pre-shipment inspection (PSI). If there is an issue with MSL1064AW-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 MSL1064AW-R part is unused and in its original packaging.
Return procedure for MSL1064AW-R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MSL1064AW-R Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
