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Microchip Technology MIC4811YMM-TR
- Part No.:
- MIC4811YMM-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC4811YMM-TR.pdf
- Description:
- IC LED DRVR LIN PWM 50MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,341
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Product details
Overview
MIC4811YMM-TR from Micrel is a high-efficiency 6-channel linear white LED driver for signage backlighting, delivering ±1% typical current matching and 100mV dropout at 50mA per channel with Ultra Fast PWM™ dimming down to 1% duty cycle across 200Hz–500kHz. It operates from 3.0V–5.5V input and drives up to six 50mA WLEDs in parallel or independent configurations.
For engineers reviewing the MIC4811YMM-TR datasheet, MIC4811YMM-TR pinout, MIC4811YMM-TR application, or MIC4811YMM-TR equivalent, key selection criteria include linear WLED driver architecture, DAM™-enabled channel matching, MSOP-10 thermal performance (θJA = 130.5°C/W), and compatibility with battery-powered signage requiring flicker-free dimming.
Technical Context
The MIC4811YMM-TR implements six independent current-mirror-based linear drivers, each regulated by an internal 1.27V reference and externally set via RSET. Its Dynamic Average Matching™ (DAM™) architecture multiplexes four voltage references to maintain ±1% typical matching across all channels over temperature and dimming range.
Ultra Fast PWM™ control accepts 200Hz–500kHz signals on the EN pin, supporting both low-frequency (1–100% duty cycle) and high-frequency (>20kHz, non-linear duty-to-current mapping) dimming modes. Shutdown current is ≤1µA, and wake-up requires ≥60µs logic-high pulse to ensure deterministic state initialization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0V to 5.5V - supports direct Li-ion or USB-powered operation without boost conversion |
| Max LED Current per Channel | 50mA - set precisely via external RSET resistor (e.g., 16.5kΩ for 50mA) |
| Current Accuracy | ±1% typical - ensures consistent brightness across all operating conditions |
| Channel Matching | ±1% typical - enables uniform illumination in multi-LED signage displays |
| Dropout Voltage | 100mV at 50mA - minimizes power loss and heat generation in linear topology |
| PWM Frequency Range | 200Hz to 500kHz - accommodates both audible-noise-sensitive and high-speed display applications |
| Junction Temperature Range | –40°C to +125°C - qualified for outdoor marquee and automotive instrument cluster use |
Pinout & Package
Package: 10-pin MSOP (MM), 3mm × 3mm body, 0.5mm pitch, exposed pad for thermal enhancement. Thermal resistance θJA = 130.5°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main power input | Supplies all six linear drivers and internal circuitry; requires ≥2.2µF ceramic bypass capacitor to GND |
| EN | Enable/dimming control | Active-high enable; accepts PWM signal for dimming; ≥60µs pulse required for reliable wake-up from sleep |
| RSET | Current reference setting | Connects to GND via precision resistor to set peak LED current (e.g., 16.5kΩ → 50mA) |
| GND | Power and signal ground | Low-impedance return path for all LED currents and bias circuits; critical for thermal and noise performance |
| D1–D6 | LED cathode drivers | Each independently sinks up to 50mA; connect WLED anodes to VIN and cathodes to D1–D6 respectively |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Average Matching™ (DAM™) | Enables ±1% typical current matching across all six channels over full temperature and dimming range |
| Ultra Fast PWM™ interface | Supports 200Hz–500kHz dimming with no visible flicker, even at <1% duty cycle in low-frequency mode |
| Low dropout linear regulation | 100mV at 50mA eliminates need for inefficient charge pumps or inductive boost stages |
| Programmable current per channel | Single external RSET resistor sets identical peak current for all channels with <0.14% tolerance contribution |
| Thermal robustness | Rated for –40°C to +125°C junction operation and 130.5°C/W θJA, enabling compact PCB layouts in enclosed signage housings |
Applications
| Billboard Displays | Marquee Displays |
|---|---|
Use Scenario: Outdoor large-format LED signage requiring uniform brightness and long-term reliability under wide temperature swings. IC Role / Device Role / Timing Role: Linear WLED driver providing stable 50mA per channel with ±1% matching to eliminate visible luminance gradients. Use Value: Eliminates switching noise and EMI concerns associated with boost converters while maintaining >98% efficiency at 3.7V input. |
Use Scenario: Architectural lighting installations with dynamic color-changing WLED arrays controlled via PWM. IC Role / Device Role / Timing Role: Six-channel dimmable current sink enabling synchronized, flicker-free intensity control across multiple WLED strings. Use Value: Ultra Fast PWM™ support up to 500kHz allows integration with high-speed microcontroller PWM peripherals without added filtering. |
| Instrument Displays | LCD Display Modules |
Use Scenario: Automotive or industrial dashboards where EMI sensitivity prohibits switching regulators near analog sensors. IC Role / Device Role / Timing Role: Low-noise linear backlight driver ensuring clean analog signal integrity in mixed-signal environments. Use Value: 100mV dropout enables direct battery rail operation (3.0–5.5V), reducing BOM count and board space vs. DC/DC + LDO solutions. |
Use Scenario: Consumer electronics LCD backlights requiring precise grayscale tracking and minimal thermal footprint. IC Role / Device Role / Timing Role: Constant-current source for six independent WLED segments, each dimmed via shared EN PWM input. Use Value: DAM™ architecture maintains <1% luminance deviation across all segments during brightness ramping and temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | Switching buck-boost WLED driver; higher efficiency at low input voltages but introduces EMI and requires inductor | Preferred for battery-powered portable devices with <3.0V minimum input or >100mA per string | Select when input voltage drops below 3.0V or total power exceeds 1W; avoid if EMI-sensitive or space-constrained |
| TPS61165DRVR | Inductive boost WLED driver; supports up to 40V output, 30mA per channel, integrated MOSFETs | Suitable for single-string high-Vf WLEDs (e.g., 3+ LEDs in series) where linear dropout is insufficient | Choose when driving >3-series WLED strings from 3.3V rail; not suitable for multi-string parallel architectures requiring tight matching |
Compared with AL8862SP-13 and TPS61165DRVR, the MIC4811YMM-TR delivers superior channel matching (±1% vs. ±3–5%) and zero EMI in linear operation, making it optimal for fixed-input, multi-string signage where optical uniformity and layout simplicity outweigh peak efficiency gains.
Availability
MIC4811YMM-TR is available at Aetrix Electronics and suitable for billboard displays, marquee lighting, and instrument clusters requiring stable component supply, long-lifecycle availability, and guaranteed traceable sourcing.
Supply support for MIC4811YMM-TR 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
Micrel, Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC4811YMM-TR belongs to Micrel's high-accuracy linear LED driver product line, designed specifically for signage and display applications demanding optical uniformity, low EMI, and simplified thermal design.
FAQ
What is the maximum LED current per channel supported by the MIC4811YMM-TR?
The MIC4811YMM-TR supports up to 50mA per channel, set by the external RSET resistor. With RSET = 16.5kΩ connected to GND, the device delivers 50mA peak current per channel at 100% duty cycle. The current accuracy is ±1% typical, and the dropout remains only 100mV at this load, confirming stable regulation under full drive conditions. This value is validated across the full –40°C to +125°C junction temperature range.
How does the MIC4811YMM-TR achieve ±1% current matching across all six channels?
The MIC4811YMM-TR achieves ±1% typical current matching using Dynamic Average Matching™ (DAM™), which multiplexes four internal voltage references to continuously calibrate the six current mirrors. This architecture actively compensates for process, voltage, and temperature variations-ensuring matched output regardless of how many channels are active. Matching is confirmed in the datasheet across the full dimming range and temperature span, not just at nominal conditions.
Can the MIC4811YMM-TR be used with input voltages below 3.0V?
No-the MIC4811YMM-TR has a specified minimum input voltage of 3.0V per the Absolute Maximum and Operating Ratings tables. Operation below 3.0V violates the guaranteed operating range and may result in improper regulation, reduced current accuracy, or failure to enable. For sub-3.0V applications, alternative architectures such as boost-based WLED drivers must be considered.
What is the purpose of the 60µs minimum pulse width on the EN pin of the MIC4811YMM-TR?
The 60µs minimum logic-high pulse on the EN pin ensures deterministic wake-up from low-Iq sleep mode. Without this pulse width, internal control circuitry may enter an indeterminate state, causing erratic LED behavior or delayed response. This requirement applies only during initial wake-up; subsequent PWM dimming pulses may be shorter. The specification is verified in functional testing and documented in the "EN" section of the datasheet.
Is the MIC4811YMM-TR pin-compatible with other Micrel linear WLED drivers like the MIC4801?
No-MIC4811YMM-TR is not pin-compatible with MIC4801. The MIC4801 is a 4-channel variant in an 8-pin MSOP package with different pin assignment (e.g., no D5/D6 pins), distinct RSET scaling, and no DAM™ architecture. Pinout, package size, and functional allocation differ fundamentally; PCB redesign is required for substitution. Always verify pin configuration and electrical characteristics before replacement.
MIC4811YMM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 6
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 50mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MSOP
MIC4811YMM-TR FAQ
1.How can I place an order for MIC4811YMM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4811YMM-TR 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 MIC4811YMM-TR reliable?
The price and inventory of MIC4811YMM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4811YMM-TR is usually 5 days.
3.What payment methods are accepted for MIC4811YMM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4811YMM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4811YMM-TR?
MIC4811YMM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4811YMM-TR 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 MIC4811YMM-TR?
For technical support, including MIC4811YMM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4811YMM-TR requirements.
6.How does Aetrix verify that MIC4811YMM-TR is sourced from the original manufacturer or authorized distributors?
All MIC4811YMM-TR 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 MIC4811YMM-TR meets industry standards.
7.What is the process for return or replacement of MIC4811YMM-TR?
All MIC4811YMM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC4811YMM-TR, 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 MIC4811YMM-TR part is unused and in its original packaging.
Return procedure for MIC4811YMM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4811YMM-TR Tags
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