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Microchip Technology MIC3202YME
- Part No.:
- MIC3202YME
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
MIC3202YME.pdf
- Description:
- IC LED DRIVER RGLTR PWM 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:296
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Product details
Overview
MIC3202YME from Micrel is a hysteretic step-down constant-current LED driver IC with integrated high-side MOSFET and high-side current-sense amplifier, delivering ±5% LED current accuracy at up to 1A output, 6–37V input range, and 1MHz switching frequency-designed for architectural lighting, LED bulbs, and 12V MR-16/garden lighting systems.
For engineers reviewing the MIC3202YME datasheet, MIC3202YME pinout, MIC3202YME application, or MIC3202YME equivalent, key selection considerations include dither-enabled low-EMI operation, high-side sensing topology, 8-pin e-PAD SOIC thermal performance, and PWM dimming support up to 20kHz.
Technical Context
The MIC3202YME implements hysteretic (bang-bang) control without loop compensation, using internal VCS(MAX)/VCS(MIN) thresholds (212mV/177mV typ.) to regulate inductor current within a fixed hysteresis window. Its integrated 275mΩ (typ.) N-channel MOSFET switches at up to 1MHz, with frequency dithering (±12%) to spread EMI spectrum.
It features dual ground separation (AGND and PGND), dedicated DIM and EN logic inputs (2.0V threshold), and a regulated 5V VCC rail derived from VIN. High-side current sensing via external RCS resistor enables accurate LED current setting independent of LED forward voltage variation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 37V - supports wide-range DC supplies including 12V/24V/36V industrial and automotive lighting rails. |
| LED Current Accuracy | ±5% - achieved via high-side current sense amplifier and precision VCS thresholds, stable over −40°C to +125°C. |
| Switching Frequency | Up to 1MHz - enables use of compact 47µH inductors and reduces solution footprint vs. lower-frequency alternatives. |
| Current-Sense Topology | High-side sensing - eliminates ground path disruption, preserves common-mode noise immunity, and simplifies PCB layout. |
| Thermal Protection | Over-temperature shutdown at 160°C (125°C max operating junction) - safeguards against thermal runaway in enclosed fixtures. |
| Dimming Interface | Dedicated PWM DIM input (20kHz max) - provides precise brightness control without analog current scaling or color shift. |
| Package Thermal Resistance | θJA = 41°C/W - 8-pin e-PAD SOIC delivers effective power dissipation for 1A LED loads in thermally constrained designs. |
Pinout & Package
Package: 8-pin e-PAD SOIC (ME) with exposed thermal pad connected to PGND - optimized for thermal conduction and EMI reduction in high-current LED driver layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Voltage regulator output | 5V internal supply rail; requires 1µF ceramic bypass close to AGND for stable biasing of analog circuitry. |
| CS | High-side current-sense input | Monitors voltage drop across external RCS resistor; sets LED current with ±5% accuracy via VCS(MAX)/VCS(MIN) hysteresis. |
| VIN | Main input power supply | Accepts 6–37V; powers internal regulator and high-side comparator; requires local 1µF ceramic bypass to PGND. |
| AGND | Analog ground reference | Reference for CS, EN, DIM, and VCC circuits; must be isolated from PGND except at single-point connection. |
| EN | Enable logic input | Active-high (≥2.0V); disables regulator and reduces quiescent current to <5µA when pulled low. |
| DIM | PWM dimming control | Directly gates output stage; enables 1–99% duty-cycle dimming up to 20kHz without affecting current regulation. |
| PGND | Power ground return | High-current return path for MOSFET and inductor; must be routed separately from AGND with minimal loop area. |
| LX | Internal MOSFET drain node | Switching node connecting to inductor; carries high di/dt; requires short, wide trace and isolation from sensitive signals. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic control architecture | No external compensation required - eliminates stability risks and simplifies design for varying LED string voltages. |
| Frequency dithering | ±12% switching frequency modulation - spreads EMI energy to meet Class B conducted/emission limits without added filtering. |
| Integrated 275mΩ MOSFET | Reduces BOM count and board space; eliminates gate-drive complexity while maintaining >90% efficiency at 1A. |
| Separate AGND/PGND pins | Prevents digital switching noise from corrupting current-sense accuracy - critical for ±5% LED current regulation. |
| −40°C to +125°C operation | Validated junction temperature range - supports deployment in outdoor luminaires, streetlights, and under-hood automotive lighting. |
Applications
| Architectural Lighting | LED Bulbs (MR-16/Garden) |
|---|---|
Use Scenario: Constant-current driver for multi-LED strings in façade lighting, cove lighting, and signage where thermal management and EMI compliance are critical. IC Role / Device Role / Timing Role: Primary LED current regulator implementing hysteretic step-down conversion with high-side sensing and dithered switching. Use Value: ±5% current accuracy ensures uniform luminance across long LED strings; 1MHz operation allows compact 47µH inductors in space-constrained extrusions. |
Use Scenario: Replacement driver for 12V AC/DC MR-16 halogen bulbs and low-voltage garden/pathway lights requiring high efficiency and thermal resilience. IC Role / Device Role / Timing Role: Integrated LED controller with built-in MOSFET and current-sense amplifier - replaces discrete FET + op-amp solutions. Use Value: 6–37V input range accommodates rectified 12VAC and 12VDC supplies; e-PAD SOIC package dissipates heat effectively in enclosed bulb housings. |
| Street Lighting Subsystems | Channel Letters & Signage |
Use Scenario: Secondary-stage LED driver in solar-powered or grid-tied streetlight modules where input voltage varies widely (e.g., 12–36V battery banks). IC Role / Device Role / Timing Role: Wide-input buck LED controller with UVLO (4.0V typ.) and over-temperature protection - ensures reliable startup and fault recovery. Use Value: 125°C max junction rating enables operation in unventilated pole-mounted enclosures; dithering reduces EMI interference with wireless communication modules. |
Use Scenario: Brightness-controlled illumination for illuminated channel letters in commercial signage, requiring flicker-free dimming and long life. IC Role / Device Role / Timing Role: PWM-dimmable constant-current source with dedicated DIM pin - decouples brightness control from enable logic for flexible system integration. Use Value: 20kHz dimming frequency eliminates audible noise and visible flicker; high-side sensing avoids ground-referenced current errors in multi-letter installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3409MM/NOPB | External MOSFET required; no integrated switch; uses current-mode control with compensation network. | Better suited for higher-power (>2A) or multi-string configurations where layout flexibility outweighs BOM simplicity. | Choose LM3409MM/NOPB when designing for >1.5A LED current or needing programmable soft-start/fault reporting. |
| AL8862SP-13 | No dithering; fixed 500kHz switching; lower input range (6–30V); ±3% current accuracy. | Targeted at cost-sensitive consumer LED lamps where EMI requirements are less stringent. | Choose AL8862SP-13 only if dithering is unnecessary and 30V max input suffices for the application. |
Compared with LM3409MM/NOPB and AL8862SP-13, the MIC3202YME uniquely combines integrated MOSFET, dither-enabled EMI reduction, and high-side sensing in an 8-pin SOIC - offering the most compact, thermally robust, and EMI-compliant solution for 1A-class architectural and bulb replacement designs.
Availability
MIC3202YME is available at Aetrix Electronics and suitable for architectural lighting, LED bulbs, and street lighting subsystems requiring stable component supply, long-lifecycle assurance, and RoHS-compliant green packaging.
Supply support for MIC3202YME 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 specializing in power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015.
The MIC3202YME belongs to Micrel's high-brightness LED driver product line, engineered specifically for efficient, thermally resilient, and EMI-conscious constant-current driving of single- or multi-LED strings in commercial and industrial lighting.
FAQ
What is the maximum LED current supported by the MIC3202YME?
The MIC3202YME supports up to 1A LED current with ±5% accuracy, set by the external high-side current-sense resistor (RCS). Its internal MOSFET has a typical RDS(ON) of 275mΩ and is rated for continuous 1A operation within the −40°C to +125°C junction temperature range. The MIC3202YME datasheet confirms this capability across input voltages from 6V to 37V and LED string configurations up to eight 1A LEDs in series.
Does the MIC3202YME require external compensation components?
No, the MIC3202YME uses a hysteretic (bang-bang) control architecture that eliminates the need for external compensation networks. It regulates LED current by comparing the CS pin voltage against internal VCS(MAX) and VCS(MIN) thresholds (212mV/177mV typ.), enabling stable operation across varying input voltages and LED forward voltages without loop tuning. This simplifies design and improves transient response.
How does the frequency dithering feature of the MIC3202YME reduce EMI?
The MIC3202YME modulates its switching frequency by ±12% using a pseudo-random generator that dithers the VCS(MAX) threshold by ±6mV. This spreads EMI energy across a wider frequency band instead of concentrating it at the fundamental switching frequency and harmonics - helping the MIC3202YME meet Class B conducted and radiated emission standards without additional EMI filters or shielding.
Can the MIC3202YME operate from a 12V AC input after rectification?
Yes, the MIC3202YME can operate from rectified 12V AC, provided the resulting DC input meets its 6–37V operating range and ripple is adequately filtered. With typical bridge rectifier and bulk capacitor smoothing, peak voltage reaches ~17V, well within the MIC3202YME's 37V absolute maximum rating. Input capacitor recommendations (1µF ceramic near VIN/PGND) ensure stable operation under ripple conditions.
What is the purpose of separate AGND and PGND pins on the MIC3202YME?
The MIC3202YME separates AGND (analog ground) and PGND (power ground) to prevent high di/dt switching currents from coupling noise into the precision current-sense path. AGND serves the CS comparator, EN/DIM logic, and VCC regulator, while PGND carries inductor and MOSFET return current. Keeping these grounds isolated - with connection only at a single point - maintains ±5% LED current accuracy and avoids regulation instability.
MIC3202YME 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:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 37V
- Voltage - Output:
- -
- Current - Output / Channel:
- 1A
- Frequency:
- 1MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC-EP
MIC3202YME FAQ
1.How can I place an order for MIC3202YME through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3202YME 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 MIC3202YME reliable?
The price and inventory of MIC3202YME are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3202YME is usually 5 days.
3.What payment methods are accepted for MIC3202YME?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3202YME transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3202YME?
MIC3202YME orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3202YME 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 MIC3202YME?
For technical support, including MIC3202YME datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3202YME requirements.
6.How does Aetrix verify that MIC3202YME is sourced from the original manufacturer or authorized distributors?
All MIC3202YME 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 MIC3202YME meets industry standards.
7.What is the process for return or replacement of MIC3202YME?
All MIC3202YME units undergo pre-shipment inspection (PSI). If there is an issue with MIC3202YME, 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 MIC3202YME part is unused and in its original packaging.
Return procedure for MIC3202YME:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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