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Microchip Technology MIC4802YME
- Part No.:
- MIC4802YME
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MIC4802YME.pdf
- Description:
- IC LED DRVR LIN PWM 800MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:323
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Product details
Overview
MIC4802YME from Micrel is a single-channel linear white LED (WLED) driver delivering up to 800mA constant current with ±1% typical accuracy, 280mV dropout at full load, and Ultra Fast PWM™ dimming support from 200Hz to 500kHz - designed for high-brightness signage and instrument backlighting where low-noise, boost-free operation is critical.
For engineers reviewing the MIC4802YME datasheet, MIC4802YME pinout, MIC4802YME application, or MIC4802YME equivalent, key selection considerations include its 3.0–5.5V input range, RSET-programmable current, EN-pin PWM interface with sub-1% duty cycle capability, and thermal performance in the 8-pin EPAD SOIC package under continuous 800mA load.
Technical Context
The MIC4802YME implements a precision current mirror architecture referenced to an internal 1.27V bandgap, enabling accurate LED current regulation without switching elements. Its linear topology eliminates EMI and efficiency losses associated with inductive boost or charge-pump drivers.
Dimming control is integrated into the EN pin, supporting both logic-level enable and high-frequency PWM modulation - with internal timing blocks ensuring stable startup (≥60µs wake pulse required) and flicker-free operation across 200Hz–500kHz, including non-linear response compensation above 20kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Current | 800mA - supports high-power WLEDs in billboard and architectural lighting without external current amplification. |
| Current Accuracy | ±1% typical - ensures uniform luminance across multi-LED arrays under varying temperature and supply conditions. |
| Dropout Voltage | 280mV at 800mA - enables direct battery-to-LED drive from 3.0V–5.5V sources, eliminating need for boost circuitry and associated noise. |
| PWM Frequency Range | 200Hz to 500kHz - accommodates both low-frequency human-perceptible dimming and ultrasonic (>20kHz) flicker-free backlight control. |
| Input Voltage Range | 3.0V to 5.5V - compatible with single-cell Li-ion, USB-powered, and regulated 3.3V/5V systems. |
| Junction Temp Range | –40°C to +125°C - rated for industrial and automotive cabin-temperature environments without derating. |
| Thermal Resistance θJA | 41°C/W - requires minimal PCB copper area on EPAD for thermal management at full 800mA load. |
Pinout & Package
Package: 8-pin EPAD SOIC (ME), with exposed thermal pad (HS PAD) requiring connection to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Main power input | Accepts 3.0–5.5V supply; requires ≥2.2µF ceramic bypass capacitor to GND for stability and transient response. |
| EN (Pin 2) | Enable / PWM input | Active-high logic input; doubles as PWM dimming interface - must not float; ≥60µs high pulse required to exit sleep mode. |
| RSET (Pin 3) | Current programming reference | Connects external resistor to GND to set LED current via internal 1.27V reference; accuracy depends on resistor tolerance and layout. |
| GND (Pin 4) | Power and signal ground | Low-impedance return path for bias current, LED current, and RSET reference; must be short-traced to VIN capacitor ground. |
| D1 (Pins 5–8) | LED cathode driver outputs | Four paralleled output terminals for single-channel 800mA drive - all must be connected together to LED cathode; shares common current path. |
| EPAD | Thermal heatsink pad | Exposed copper pad on underside - not electrically connected internally; must be soldered to solid GND plane for thermal conduction. |
Key Features
| Feature | Design Value |
|---|---|
| No-switching-noise operation | Linear architecture eliminates EMI and ripple, enabling use in sensitive analog or RF-adjacent lighting systems without shielding. |
| Ultra Fast PWM™ dimming | Supports 1% minimum duty cycle at 200Hz and stable response up to 500kHz - avoids audible noise and enables high-resolution brightness control. |
| Programmable current via RSET | LED current set by single external resistor (e.g., 6.19kΩ → 830mA), simplifying BOM and enabling field calibration or binning compensation. |
| Low IQ shutdown | 1µA max shutdown current - preserves battery life in portable signage when LEDs are off for extended periods. |
| Integrated thermal protection | Internally limited power dissipation combined with 41°C/W θJA enables reliable 800mA operation with standard 2-layer PCB thermal design. |
Applications
| Billboard Displays | Marquee Displays |
|---|---|
Use Scenario: Outdoor large-format LED signage powered from 5V DC supplies, requiring consistent brightness across hundreds of parallel WLED strings. IC Role / Device Role / Timing Role: Single-channel constant-current driver per LED string, regulating current independently to compensate for forward voltage variation between LEDs. Use Value: ±1% current accuracy ensures uniform luminance across entire display surface; 280mV dropout minimizes heat generation at high ambient temperatures. | Use Scenario: Animated storefront lettering using high-power WLEDs driven from 3.3V or 5V rails, with dynamic brightness control via microcontroller PWM. IC Role / Device Role / Timing Role: Primary dimmable WLED driver with EN-pin PWM interface, enabling real-time brightness adjustment without external MOSFETs or gate drivers. Use Value: 200Hz–500kHz PWM range supports both slow fade effects (200Hz) and silent, flicker-free animation (100kHz+), reducing audible coil whine and visual artifacts. |
| Instrument Displays | Architectural Lighting |
Use Scenario: Automotive or industrial dashboard backlighting where EMI-sensitive sensors and analog circuits coexist on same PCB. IC Role / Device Role / Timing Role: Low-noise linear WLED driver replacing switching boost converters to eliminate conducted and radiated emissions near CAN/LIN buses or ADC references. Use Value: Zero switching noise allows placement adjacent to precision analog sections; –40°C to +125°C rating ensures reliability across vehicle operating conditions. | Use Scenario: Indoor accent lighting using high-CRI WLED modules powered from 5V PoE or centralized 5V distribution. IC Role / Device Role / Timing Role: High-efficiency constant-current source driving single high-power WLEDs (e.g., 3.8W Seoul Semiconductor R42180) with thermal-aware layout. Use Value: EPAD SOIC package with 41°C/W θJA enables compact, fanless fixtures; programmable current supports multiple LED Vf bins without redesign. |
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 >5V input but introduces EMI and requires inductor/filtering. | Suitable for wide-input (4.5–40V) systems where battery voltage varies beyond 5.5V; not drop-in due to different topology and pinout. | Select AL8862SP-13 only when input exceeds 5.5V or efficiency >90% is mandatory; MIC4802YME preferred for noise-sensitive, fixed 3.3/5V designs. |
| TPS61165DRVR | Inductive boost WLED driver with I²C interface; supports up to 40V LED string voltage but adds complexity and cost. | Used in multi-LED series configurations (e.g., 12V strings); incompatible with single-LED parallel topologies supported by MIC4802YME. | Choose TPS61165DRVR for long LED strings requiring >5.5V compliance; MIC4802YME remains optimal for single high-current LED with minimal BOM. |
Compared with AL8862SP-13 and TPS61165DRVR, the MIC4802YME delivers superior EMI performance and simpler layout for single-WLED, 3–5.5V applications - trading off voltage flexibility and string scalability for lower noise, fewer components, and guaranteed flicker-free dimming down to 1% duty cycle.
Availability
MIC4802YME is available at Aetrix Electronics and suitable for billboard displays, marquee signage, and instrument backlighting requiring stable component supply, long-term industrial lifecycle support, and traceable sourcing from original manufacturer channels.
Supply support for MIC4802YME 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; legacy Micrel products maintain full Microchip support and documentation.
The MIC4802YME belongs to Micrel's linear LED driver product line, engineered specifically for high-current, low-noise WLED applications in signage, instrumentation, and architectural lighting where EMI constraints preclude switching topologies.
FAQ
What is the maximum continuous LED current supported by the MIC4802YME?
The MIC4802YME supports up to 800mA continuous LED current with ±1% typical accuracy. This rating assumes proper thermal management via the EPAD SOIC package - junction temperature must remain ≤+125°C, requiring PCB copper area and airflow appropriate for the calculated power dissipation (e.g., ~400mW at 500mV dropout and 800mA). Derating applies above +85°C ambient.
Can the MIC4802YME drive multiple LEDs in series?
No, the MIC4802YME is designed exclusively for single-WLED operation with anode connected to VIN and cathode to D1 pins. Its 280mV dropout limits usable LED forward voltage to ≤VIN – 0.28V; for example, at VIN = 5.0V, maximum Vf is ~4.72V. Series strings exceeding this voltage require boost or buck-boost drivers like the TPS61165DRVR - not the MIC4802YME.
How does the RSET resistor value determine LED current in the MIC4802YME?
The MIC4802YME uses an internal 1.27V reference at RSET to set LED current via ILED ≈ 4920 × D / (RSET − 0.28kΩ), where D is PWM duty cycle (1.0 for DC). For example, a 6.19kΩ resistor yields ~830mA at 100% duty cycle. The 0.28kΩ correction accounts for internal path resistance, improving accuracy over simplified calculations.
What is the minimum PWM pulse width required to wake the MIC4802YME from shutdown mode?
The MIC4802YME requires a minimum 60µs logic-high pulse on the EN pin to exit low-IQ sleep mode reliably. This wake pulse must occur before applying the main PWM dimming signal - especially critical at frequencies >15kHz. Failure to meet this requirement results in indeterminate output behavior or failure to enable the LED channel.
Is the MIC4802YME pin-compatible with other Micrel linear LED drivers such as the MIC4801?
No, the MIC4802YME is not pin-compatible with the MIC4801. While both are linear WLED drivers in EPAD SOIC packages, the MIC4801 has different pin assignments (e.g., separate FB and DIM pins) and lower current capability (350mA). Substituting MIC4801 for MIC4802YME would require PCB redesign and violates the device's specified 800mA operational envelope.
MIC4802YME Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- -
- Current - Output / Channel:
- 800mA
- Frequency:
- -
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MIC4802YME FAQ
1.How can I place an order for MIC4802YME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC4802YME 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 MIC4802YME reliable?
The price and inventory of MIC4802YME are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC4802YME is usually 5 days.
3.What payment methods are accepted for MIC4802YME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC4802YME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC4802YME?
MIC4802YME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC4802YME 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 MIC4802YME?
For technical support, including MIC4802YME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC4802YME requirements.
6.How does Aetrix verify that MIC4802YME is sourced from the original manufacturer or authorized distributors?
All MIC4802YME 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 MIC4802YME meets industry standards.
7.What is the process for return or replacement of MIC4802YME?
All MIC4802YME units undergo pre-shipment inspection (PSI). If there is an issue with MIC4802YME, 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 MIC4802YME part is unused and in its original packaging.
Return procedure for MIC4802YME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC4802YME Tags
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