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Microchip Technology MIC4811YMM
- Part No.:
- MIC4811YMM
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC4811YMM.pdf
- Description:
- IC LED DRVR LIN PWM 50MA 10MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:680
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Product details
Overview
MIC4811YMM from Micrel is a 6-channel linear white LED (WLED) driver for signage lighting, delivering ±1% typical current matching and 100mV dropout at 50mA per channel with Ultra Fast PWM™ dimming down to <1% duty cycle. It operates from 3.0V–5.5V input and drives up to six high-current WLEDs in billboard and marquee displays.
For engineers reviewing the MIC4811YMM datasheet, MIC4811YMM pinout, MIC4811YMM application, or MIC4811YMM equivalent, key selection criteria include linear efficiency vs. switching losses, DAM™-enabled channel uniformity across temperature, PWM frequency support up to 500kHz, and MSOP-10 thermal performance at +125°C junction.
Technical Context
The MIC4811YMM implements six independent linear current sources, each mirroring a master current set by an external RSET resistor (e.g., 16.5kΩ for 50mA). Its Dynamic Average Matching™ (DAM™) architecture multiplexes four voltage references to maintain ±1% typical matching across all channels over full dimming range and temperature (–40°C to +125°C).
Ultra Fast PWM™ control accepts 200Hz–500kHz signals on the EN pin, supporting both low-frequency flicker-free dimming (1–100% duty cycle at ≤20kHz) and high-frequency operation (≥20kHz), where duty cycle vs. average current becomes non-linear due to internal propagation delay-requiring calibration per application.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LED Channels | 6 independent linear current sinks, each configurable up to 50mA |
| Current Accuracy | ±1% typical across –40°C to +125°C, enabling uniform luminance without per-channel trimming |
| Channel Matching | ±1% typical, maintained via DAM™ architecture across full PWM dimming range |
| Dropout Voltage | 100mV at 50mA per channel, allowing direct battery drive without boost circuitry |
| PWM Frequency Range | 200Hz to 500kHz on EN pin, supporting both flicker-free and ultra-fast dimming modes |
| Input Voltage Range | 3.0V to 5.5V, compatible with single-cell Li-ion and regulated 3.3V/5V rails |
| Package Thermal Resistance | θJA = 130.5°C/W in 10-pin MSOP, enabling 1.2W max power dissipation at +125°C TJ |
Pinout & Package
Package: 10-pin MSOP (MM), exposed pad not electrically connected, JEDEC MO-187AC compliant, 3mm × 3mm footprint, 0.5mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Supplies current to all six drivers and internal circuitry; requires ≥2.2µF ceramic bypass capacitor to GND |
| EN (Pin 2) | Enable/dimming control | Active-high enable; doubles as PWM input for dimming; >20ms low enables sleep mode; first pulse must be ≥60µs |
| RSET (Pin 3) | Current reference setting | Connects to GND via resistor (e.g., 16.5kΩ) to set peak LED current; internal 1.27V reference |
| GND (Pin 4) | Power and signal ground | Common return path for VIN bypass cap, RSET, and all LED cathodes; low-impedance routing critical |
| D6–D1 (Pins 5–10) | LED cathode current sinks | Each sinks up to 50mA; connect WLED anodes to VIN and cathodes to respective D pins; unused pins left open |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Average Matching™ (DAM™) | Enables ±1% typical channel matching across full dimming range and temperature without external calibration |
| Ultra Fast PWM™ interface | Supports 200Hz–500kHz PWM on EN pin, eliminating need for external PWM generators or microcontroller GPIO timing constraints |
| Low dropout linear regulation | 100mV dropout at 50mA allows direct use of 3.3V or 3.7V battery rails-no charge pump or inductor required |
| Programmable per-channel current | Single RSET resistor sets identical peak current for all six channels; simplifies BOM and layout vs. per-channel resistors |
| Thermal robustness | Rated for –40°C to +125°C junction operation with internal thermal shutdown protection |
Applications
| Billboard Displays | Marquee Displays |
|---|---|
Use Scenario: Outdoor large-format signage requiring consistent brightness across dozens of WLED strings under variable ambient temperature. 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, critical for FCC Class B compliance in public installations. | Use Scenario: Architectural lighting for theater marquees with rapid brightness transitions during show changes. IC Role / Device Role / Timing Role: High-bandwidth PWM-controlled current sink enabling sub-millisecond response to dimming commands. Use Value: Ultra Fast PWM™ support up to 500kHz allows clean, high-resolution dimming without audible coil whine or visible flicker. |
| Instrument Displays | LCD Display Modules |
Use Scenario: Automotive or industrial dashboards needing reliable backlighting across wide temperature extremes. IC Role / Device Role / Timing Role: Six-channel linear driver maintaining regulation at 100mV dropout, enabling direct connection to 12V-to-5V LDO outputs. Use Value: ±1% current accuracy ensures consistent color point and contrast ratio across display lifetime, even after thermal cycling. | Use Scenario: Embedded LCD panels in medical or test equipment requiring flicker-free, low-noise backlighting. IC Role / Device Role / Timing Role: Constant-current WLED driver with DAM™ ensuring uniform illumination across entire LCD surface. Use Value: No inductive components or switching ripple reduces risk of EMI-induced measurement errors in sensitive analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 6-channel linear WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8863T-13 | Switching buck-boost WLED driver; supports up to 40V output; higher efficiency at high VLED but adds EMI and inductor size | Preferred for multi-series WLED strings (>3 LEDs) where VIN < VLED total; unsuitable for low-noise environments | Select when system requires >50mA/channel or >3.3V LED forward voltage; avoid if board space or EMI budget is constrained |
| TPS61165DRVR | Inductive boost WLED driver with I²C interface; 30mA max per channel; integrated PWM generator | Better suited for compact portable devices with microcontroller-based dimming control; lacks DAM™ matching precision | Choose for designs needing programmable dimming curves or dynamic current scaling; not recommended for signage requiring <±1.5% matching |
Compared with AL8863T-13 and TPS61165DRVR, the MIC4811YMM delivers superior channel matching and zero-switching-noise operation ideal for fixed-brightness signage, while trading off voltage headroom flexibility and digital control features found in switching alternatives.
Availability
MIC4811YMM is available at Aetrix Electronics and suitable for billboard displays, marquee lighting, and instrument backlighting requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for MIC4811YMM 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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-reliability power management and timing solutions.
The MIC4811YMM belongs to Micrel's linear LED driver product line, engineered specifically for high-uniformity signage and display backlighting where EMI-free operation and precise current matching outweigh efficiency trade-offs of switching topologies.
FAQ
What is the maximum LED current per channel supported by the MIC4811YMM?
The MIC4811YMM supports up to 50mA per channel when configured with a 16.5kΩ RSET resistor. Current is programmable via the RSET pin using the formula RSET [kΩ] = (820 / ILED [mA]) + 0.139. The device maintains ±1% typical accuracy and <100mV dropout at this level, making MIC4811YMM suitable for high-brightness signage applications without thermal derating under standard conditions.
Does the MIC4811YMM require an external PWM generator, or can it accept direct PWM signals?
The MIC4811YMM accepts direct PWM signals on its EN pin-no external generator needed. It supports frequencies from 200Hz to 500kHz and duty cycles down to <1%. At frequencies ≤20kHz, duty cycle maps linearly to average LED current; above 20kHz, non-linearity occurs due to internal propagation delay, so MIC4811YMM users should characterize response per application.
How does Dynamic Average Matching™ (DAM™) improve performance in the MIC4811YMM compared to standard current mirrors?
DAM™ in the MIC4811YMM uses time-multiplexed voltage references to dynamically correct for process and temperature drift across all six channels, achieving ±1% typical matching over full dimming range and –40°C to +125°C. Standard current mirrors typically exhibit >3% mismatch under same conditions, making MIC4811YMM uniquely suited for uniform illumination in large-area displays where visual banding must be avoided.
Can unused LED driver channels on the MIC4811YMM be left unconnected without affecting regulation on active channels?
Yes-unused D pins (D1–D6) on the MIC4811YMM may be left floating with no impact on regulation or matching of active channels. The MIC4811YMM maintains proper current regulation regardless of how many channels are utilized, and its design ensures that disabling one or more channels does not alter the reference current or thermal load distribution affecting remaining outputs.
What is the recommended input capacitor for stable operation of the MIC4811YMM?
A 2.2µF X5R or X7R ceramic capacitor placed close to the VIN and GND pins is recommended for MIC4811YMM. Low-ESR construction is essential; Y5V dielectrics are discouraged due to capacitance loss over temperature. This capacitor stabilizes the input rail during fast current transients, ensuring consistent regulation and preventing undershoot that could trigger false shutdown in the MIC4811YMM.
MIC4811YMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-TFSOP, 10-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MIC4811YMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4811YMM 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 reliable?
The price and inventory of MIC4811YMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4811YMM is usually 5 days.
3.What payment methods are accepted for MIC4811YMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4811YMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4811YMM?
MIC4811YMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4811YMM 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?
For technical support, including MIC4811YMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4811YMM requirements.
6.How does Aetrix verify that MIC4811YMM is sourced from the original manufacturer or authorized distributors?
All MIC4811YMM 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 meets industry standards.
7.What is the process for return or replacement of MIC4811YMM?
All MIC4811YMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC4811YMM, 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 part is unused and in its original packaging.
Return procedure for MIC4811YMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4811YMM Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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