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Microchip Technology MIC2841AYMT-TR
- Part No.:
- MIC2841AYMT-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Datasheet:
-
MIC2841AYMT-TR.pdf
- Description:
- IC LED DRVR LIN DIM 20MA 10TMLF
- Quantity:
- Payment:
- Shipping:
Inventory:7,675
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Product details
Overview
MIC2841AYMT-TR from Micrel is a high-efficiency 4-channel linear white LED (WLED) driver IC for portable backlighting and flash applications, featuring Dynamic Average Matching™ (DAM™), Ultra Fast PWM™ dimming (200 Hz–500 kHz), 40 mV dropout at 20 mA, ±1.5% typical current matching, and operation from 3.0 V to 5.5 V input.
For engineers reviewing the MIC2841AYMT-TR datasheet, MIC2841AYMT-TR pinout, MIC2841AYMT-TR application, or MIC2841AYMT-TR equivalent, this page delivers verified technical context, real-world design meaning of key specs, validated pin functions, and confirmed alternative options for WLED driver selection in battery-powered mobile systems.
Technical Context
The MIC2841AYMT-TR implements four independent linear current sources with a shared RSET-based master reference and DAM™ architecture that dynamically multiplexes voltage references to achieve ±1.5% typical channel matching across full dimming range. It uses no switching elements-eliminating EMI and efficiency loss from charge pumps or inductive boosters.
Dimming is controlled via PWM applied directly to the END pin, supporting both low-frequency (200 Hz–20 kHz, 1–100% duty cycle) and ultra-fast (20 kHz–500 kHz) modes with internal propagation delay compensation. The device maintains regulation regardless of active channel count and supports parallel channel operation for up to 1.0 A flash current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 5.5 V - compatible with single-cell Li-ion (3.6 V nominal) and USB-powered systems without LDO pre-regulation. |
| Dropout Voltage | 40 mV at 20 mA - enables direct battery drive of WLEDs, avoiding efficiency loss and noise from boost converters. |
| Current Matching | ±1.5% typical - ensures uniform brightness across all four channels under varying temperature and supply conditions. |
| PWM Frequency Range | 200 Hz to 500 kHz - supports flicker-free dimming at >20 kHz and flexible system-level timing integration. |
| Shutdown Current | 0.01 µA to 1 µA - minimizes battery drain during sleep mode in always-on portable devices. |
| Thermal Resistance θJA | 90 °C/W - requires minimal PCB copper area for thermal management in compact 2 mm × 2 mm MLF package. |
Pinout & Package
Package: 10-pin 2 mm × 2 mm Thin MLF® (MT) leadless package with exposed thermal pad (EPAD), RoHS-compliant NiPdAu finish, halogen-free mold compound, and –40°C to +125°C junction temperature rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Supplies bias and driver current; requires ≥1 µF ceramic bypass capacitor to GND for stability and transient response. |
| END (Pin 2) | Enable/dimming control | Active-high enable; accepts PWM signal for dimming; >24 ms low triggers low-Iq sleep mode; must not float. |
| RSET (Pin 3) | Current reference setting | Connects external resistor to GND to set peak LED current per channel (e.g., 20.5 kΩ = 20 mA at 100% duty). |
| GND (Pin 4) | Power ground | Low-impedance return path for all drivers and control circuitry; critical for current accuracy and thermal performance. |
| NC (Pins 5, 6) | No connect | Internally unconnected; no PCB trace or component required; may be left floating or tied to GND for mechanical stability. |
| D4–D1 (Pins 7–10) | LED cathode drivers | Sink outputs for WLED cathodes; each independently regulated; unused pins may be left open; paralleling enables flash-mode currents up to 1.0 A. |
| EPAD | Thermal pad | Exposed copper pad on bottom; not electrically connected; must be soldered to GND plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Dynamic Average Matching™ (DAM™) | Delivers ±1.5% typical current matching across all four channels over full temperature and dimming range-critical for uniform LCD backlighting. |
| Ultra Fast PWM™ interface | Supports 200 Hz–500 kHz PWM frequencies with <1% minimum duty cycle-enables flicker-free dimming and compatibility with high-speed MCU timers. |
| Linear architecture with 40 mV dropout | Eliminates switching noise and losses, allowing direct battery drive of WLEDs without EMI filters or inductor footprint. |
| Parallel channel operation | Four D-pins can be wired in parallel to deliver up to 1.0 A total sink current-enables high-brightness flash/torch functionality using single IC. |
| Low shutdown current (≤1 µA) | Extends standby battery life in always-connected mobile devices such as GPS units and media players. |
Applications
| Mobile Handset LCD Backlighting | Handset Keypad Backlighting |
|---|---|
|
Use Scenario: Driving four discrete WLEDs behind a 3.5-inch TFT display in a GSM smartphone with Li-ion battery supply. IC Role / Device Role / Timing Role: Four-channel constant-current sink driver regulating individual LED brightness via END-pin PWM dimming synchronized to display frame rate. Use Value: ±1.5% channel matching ensures uniform luminance across display corners; 40 mV dropout preserves battery runtime by eliminating boost converter losses. |
Use Scenario: Illuminating alphanumeric keypad LEDs in dual-SIM feature phone operating from 3.7 V battery with intermittent user interaction. IC Role / Device Role / Timing Role: Low-quiescent linear driver enabling rapid on/off cycling via microsecond-scale enable response (≤80 µs turn-on). Use Value: 0.01 µA shutdown current extends idle battery life; small 2 mm × 2 mm footprint fits tight space above keypad flex assembly. |
| High-Current Camera Flash | Portable Media Player Backlight |
|
Use Scenario: Powering single high-intensity WLED flash in 5-megapixel camera module requiring 800 mA peak current for 200 ms bursts. IC Role / Device Role / Timing Role: Four D-pins paralleled into one 1.0 A sink output, controlled by logic-level PWM pulse from baseband processor. Use Value: Eliminates need for discrete MOSFET array and gate drivers; integrated current accuracy avoids external sense resistors and calibration. |
Use Scenario: Backlighting OLED or LCD screen in MP3 player with variable brightness settings and 12-hour playback requirement. IC Role / Device Role / Timing Role: Four independent channels driving segmented backlight zones, dimmed via 20 kHz PWM to avoid audible coil whine. Use Value: Ultra Fast PWM™ support enables silent, smooth dimming without audio interference; 3.0–5.5 V range accommodates aging battery voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar WLED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3631SDX/NOPB | 3-channel linear WLED driver; 60 mV dropout at 20 mA; 2.7–5.5 V input; no DAM™ architecture; ±3% matching. | Lacks fourth channel and DAM™ precision; suitable only for 3-LED displays or lower uniformity requirements. | Select when third-party validation confirms 3-channel sufficiency and ±3% matching is acceptable for target display quality. |
| TPS61165DRVR | Single-channel inductive boost WLED driver; 2.7–6.5 V input; 1.2 MHz switching; 90% efficiency; no linear dropout advantage. | Generates switching noise and requires inductor/filter; incompatible with noise-sensitive RF sections; higher BOM cost. | Choose only if higher LED forward voltage (>4.2 V) prevents direct battery drive and board area permits inductor placement. |
Compared with LM3631SDX/NOPB and TPS61165DRVR, the MIC2841AYMT-TR uniquely delivers four precisely matched linear channels with sub-40 mV dropout-enabling optimal battery efficiency, zero EMI, and uniform illumination in space-constrained mobile designs where boost topology is undesirable.
Availability
MIC2841AYMT-TR is available at Aetrix Electronics and suitable for mobile handset LCD backlighting, keypad illumination, camera flash circuits, and portable media player displays requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC2841AYMT-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-performance power management, timing, and interface ICs.
The MIC2841AYMT-TR belongs to Micrel's linear WLED driver product line, engineered specifically for battery-powered mobile visual interfaces requiring ultra-low noise, precise current matching, and seamless integration with baseband processor PWM peripherals.
FAQ
What is the maximum LED current per channel for MIC2841AYMT-TR?
The MIC2841AYMT-TR supports up to 250 mA per channel when configured with appropriate RSET and thermal management. At 20 mA per channel (standard configuration with 20.5 kΩ RSET), dropout is 40 mV. Higher currents require derating based on θJA = 90 °C/W and PCB copper area. Full 1.0 A flash mode is achieved only when all four D-pins are paralleled and thermally supported.
Does MIC2841AYMT-TR require an external inductor?
No, the MIC2841AYMT-TR is a fully linear WLED driver and contains no switching elements. It operates without an inductor, capacitor-based charge pump, or transformer-relying solely on low-dropout current sinks. This eliminates EMI, simplifies layout, and improves power conversion efficiency in low-VF LED applications where VIN exceeds LED forward voltage.
How does the DAM™ architecture improve display uniformity in MIC2841AYMT-TR?
The DAM™ (Dynamic Average Matching™) architecture in the MIC2841AYMT-TR dynamically multiplexes four precision voltage references to continuously calibrate each channel's current source. This achieves ±1.5% typical matching across temperature, supply voltage, and dimming duty cycle-ensuring consistent luminance across all four WLEDs in LCD backlight arrays without manual trimming or post-assembly calibration.
Can MIC2841AYMT-TR drive LEDs with forward voltage higher than the input supply?
No. As a linear driver, the MIC2841AYMT-TR requires VIN to exceed the sum of LED forward voltage (VF) and dropout voltage (e.g., VF + 40 mV). It cannot boost voltage. For example, with VF = 3.4 V, VIN must be ≥3.44 V. If VF exceeds VIN, a boost or charge-pump driver like TPS61165DRVR-not the MIC2841AYMT-TR-is required.
What is the recommended RSET value for 15 mA LED current per channel in MIC2841AYMT-TR?
Using the formula ILED (mA) = 410 × D / RSET (kΩ), with D = 1 (100% duty cycle), RSET = 410 / 15 ≈ 27.3 kΩ. A standard 27.4 kΩ, 1% tolerance resistor yields 14.98 mA per channel. Layout must ensure low-noise grounding of RSET to GND and minimize parasitic capacitance on the RSET node to preserve current accuracy.
MIC2841AYMT-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-UFDFN Exposed Pad, 10-TMLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 20mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Backlight, Camera Flash
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-TMLF® (2x2)
MIC2841AYMT-TR FAQ
1.How can I place an order for MIC2841AYMT-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2841AYMT-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 MIC2841AYMT-TR reliable?
The price and inventory of MIC2841AYMT-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2841AYMT-TR is usually 5 days.
3.What payment methods are accepted for MIC2841AYMT-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2841AYMT-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2841AYMT-TR?
MIC2841AYMT-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2841AYMT-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 MIC2841AYMT-TR?
For technical support, including MIC2841AYMT-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2841AYMT-TR requirements.
6.How does Aetrix verify that MIC2841AYMT-TR is sourced from the original manufacturer or authorized distributors?
All MIC2841AYMT-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 MIC2841AYMT-TR meets industry standards.
7.What is the process for return or replacement of MIC2841AYMT-TR?
All MIC2841AYMT-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2841AYMT-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 MIC2841AYMT-TR part is unused and in its original packaging.
Return procedure for MIC2841AYMT-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2841AYMT-TR Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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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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