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Microchip Technology MIC3203YM-TR
- Part No.:
- MIC3203YM-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MIC3203YM-TR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,597
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Product details
Overview
MIC3203YM-TR from Microchip Technology is a hysteretic step-down constant-current LED driver IC designed for high-brightness LED lighting systems. It operates across 4.5V–42V input, delivers ±5% LED current accuracy via high-side sensing, supports up to 1.5 MHz switching, and integrates dither-enabled EMI reduction. It drives external N-channel MOSFETs in architectural, street, and 12V MR-16 lighting applications.
For engineers reviewing the MIC3203YM-TR datasheet, MIC3203YM-TR pinout, MIC3203YM-TR application, or MIC3203YM-TR equivalent, this page provides verified functional context, validated package mapping (8-pin SOIC), confirmed thermal shutdown (160°C), true dimming interface behavior (PWM-controlled via DIM pin), and real-world efficiency data (>90% at 12V/1A with 4 LEDs).
Technical Context
The MIC3203YM-TR implements hysteretic control without compensation-using internal VCS(MAX) = 212 mV and VCS(MIN) = 177 mV thresholds to gate an external MOSFET via DRV output. Its 5V linear regulator (VCC) powers internal circuitry and requires a 1 µF ceramic bypass to AGND.
It features dedicated logic-level EN and DIM inputs: EN enables/disables regulation (VENH = 2.2 V), while DIM directly gates LED current (VDIMH = 2.0 V, fDIM ≤ 20 kHz). Dithering modulates VCS hysteresis by ±6 mV to spread switching frequency ±12%, reducing EMI peaks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 42 V - supports wide-range DC supplies including 12 V, 24 V, and 36 V industrial lighting rails. |
| LED Current Accuracy | ±5 % - achieved via high-side current sense with external RCS resistor and on-chip comparator. |
| Switching Frequency | Up to 1.5 MHz - enables compact magnetics (e.g., 33 µH inductor for 1 A at 12 V) and reduces solution size. |
| Thermal Shutdown | 160 °C with 20 °C hysteresis - protects against sustained overtemperature in enclosed luminaires. |
| Junction Temperature Range | –40 °C to +125 °C - qualified for outdoor, automotive-grade, and industrial ambient environments. |
| Efficiency | >90 % - measured at VIN = 12 V, ILED = 1 A, 4 LEDs, L = 150 µH (Figure 2-1). |
| EMI Control | Dither enabled - ±12 % frequency spread lowers peak radiated emissions without external filters. |
Pinout & Package
Package: 8-pin SOIC (M), surface-mount, RoHS-compliant, θJA = 98.9 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VCC | Internal 5 V regulator output | Supplies internal logic; requires 1 µF ceramic capacitor to AGND; not for external loading. |
| 2 CS | High-side current-sense input | Monitors voltage drop across external RCS to regulate LED current; Kelvin connection recommended. |
| 3 VIN | Main power input | 4.5–42 V supply rail; connects to high-frequency 10 µF ceramic bypass capacitor at PGND. |
| 4 AGND | Analog ground reference | Reference for VCC, CS, EN, DIM; must be separated from PGND and joined at single point. |
| 5 EN | Enable logic input | Active-high enable (VENH ≥ 2.2 V); pulls device into <1 µA shutdown when low. |
| 6 DIM | PWM dimming control | Directly gates LED current (VDIMH ≥ 2.0 V); supports 1–99 % duty cycle at ≤20 kHz. |
| 7 PGND | Power ground return | High-current return path for MOSFET switching loop; must be routed separately from AGND. |
| 8 DRV | External MOSFET gate driver | 5 V CMOS-compatible output (RDRV(ON) = 2 Ω pull-up / 1.5 Ω pull-down); drives N-channel FET gate. |
Key Features
| Feature | Design Value |
|---|---|
| Hysteretic control architecture | No compensation required - eliminates loop-stability concerns and simplifies BOM with no error amplifier or external compensation network. |
| High-side current sensing | Enables floating LED string configuration - supports common-anode topologies and avoids ground-referenced current-sense resistor losses. |
| Dither-enabled EMI reduction | ±12 % frequency modulation spreads spectral energy - reduces peak conducted/radiated emissions without adding snubbers or shielding. |
| Dedicated PWM dimming input | Independent of EN state - allows brightness control while maintaining system-level enable/disable sequencing. |
| Integrated 5 V VCC regulator | Self-powered from VIN - eliminates need for external bias supply; supports internal logic and gate drive without auxiliary winding. |
Applications
| Architectural Lighting | Street & Area Lighting |
|---|---|
Use Scenario: Constant-current driver for multi-LED linear modules mounted in façades, coves, and signage. IC Role / Device Role / Timing Role: Hysteretic LED controller regulating current through high-voltage LED strings powered from 24–42 V DC distribution rails. Use Value: ±5 % current accuracy ensures uniform luminance across long runs; 125 °C operation sustains reliability in sealed, thermally constrained enclosures. |
Use Scenario: Outdoor luminaire driver powering 8–12 LED series strings from 36 V solar/battery or 42 V PoE++-derived supply. IC Role / Device Role / Timing Role: Step-down constant-current regulator with dithering to meet CISPR-15 Class B conducted EMI limits in unshielded pole-mounted fixtures. Use Value: >90 % efficiency minimizes thermal load in aluminum housings; UVLO (4.5 V) prevents brownout flicker during battery discharge cycles. |
| MR-16 Retrofit Bulbs | Industrial Indicator Panels |
Use Scenario: Replacement driver for 12 V AC/DC MR-16 halogen bulbs using bridge rectifier + bulk capacitor input. IC Role / Device Role / Timing Role: High-input-range LED controller accepting rectified 12 V RMS (~17 V peak) and regulating current to 1–3 high-flux LEDs. Use Value: 4.5–42 V range accommodates input ripple and dropout; 1.5 MHz switching allows miniature inductors fitting tight bulb envelopes. |
Use Scenario: Status indicator driver in control cabinets where EMI-sensitive analog sensors coexist with LED arrays. IC Role / Device Role / Timing Role: Dimmable LED driver with independent DIM/EN pins enabling PLC-controlled brightness and fault-safe shutdown. Use Value: Dithering suppresses 1.5 MHz fundamental harmonics near sensor bandwidths; –40 °C start-up ensures operation in refrigerated facilities. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4425AGU-AEC1-P | Fixed-frequency synchronous buck (2.2 MHz), integrated MOSFETs, AEC-Q100 qualified; no dithering. | Better suited for automotive interior lighting with strict qualification requirements; lacks high-side sense flexibility. | Select when integrated power stage and automotive qualification outweigh need for dithering and external FET optimization. |
| LM3409HVMM/NOPB | Hysteretic controller like MIC3203YM-TR but with adjustable frequency (100 kHz–1 MHz), no dither, wider temp range (–40 °C to +150 °C). | Preferred for high-temp industrial ovens or under-hood lighting where 150 °C junction rating is mandatory. | Choose when higher max junction temperature is critical and EMI spreading is handled externally via layout or filtering. |
Compared with MPQ4425AGU-AEC1-P and LM3409HVMM/NOPB, the MIC3203YM-TR uniquely combines dither-enabled EMI reduction, high-side sensing for common-anode strings, and SOIC-8 footprint compatibility-making it optimal for cost-sensitive, space-constrained commercial lighting designs requiring robust EMC performance without added components.
Availability
MIC3203YM-TR is available at Aetrix Electronics and suitable for architectural lighting, street lighting, and MR-16 retrofit bulb designs requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC3203YM-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
Microchip Technology Inc. is a leading provider of microcontrollers, analog devices, and timing solutions, with broad expertise in power management and lighting control ICs.
The MIC3203 family is designed specifically for high-efficiency, wide-input-range constant-current LED drivers in commercial and industrial lighting-emphasizing simplicity (hysteretic control), EMI robustness (dithering), and thermal resilience (125 °C operation).
FAQ
What is the maximum switching frequency of the MIC3203YM-TR?
The MIC3203YM-TR supports up to 1.5 MHz switching frequency, enabling compact magnetic design and reduced output ripple. This maximum is achievable across its full 4.5–42 V input range and depends on inductor value, LED string voltage, and current. Measured data shows 475 kHz at 12 V/1 A with 33 µH inductor (Table 5-2), scaling downward at higher VIN or LED count.
Does the MIC3203YM-TR integrate a MOSFET or require an external one?
The MIC3203YM-TR requires an external N-channel MOSFET-its DRV pin provides gate drive only. This architecture allows designers to select FETs optimized for voltage rating, RDS(ON), and thermal performance per application. The IC specifies 5 V logic-level drive capability with 2 Ω pull-up and 1.5 Ω pull-down resistance, supporting fast transitions and efficient switching.
How does the dither feature in the MIC3203YM-TR reduce EMI?
The MIC3203YM-TR reduces EMI by modulating its switching frequency ±12 % via pseudo-random dithering of the VCS(MAX) threshold (±6 mV). This spreads energy across a broader spectrum instead of concentrating it at discrete harmonics, lowering peak conducted and radiated emissions-critical for meeting CISPR-15 and FCC Part 15 Class B standards without added filter components.
What is the role of the CS pin on the MIC3203YM-TR?
The CS pin on the MIC3203YM-TR serves as the high-side current-sense input, measuring voltage drop across an external sense resistor (RCS) connected between VIN and the LED string anode. It interfaces directly with the internal comparator that triggers MOSFET turn-off at VCS(MAX) = 212 mV and turn-on at VCS(MIN) = 177 mV-enabling precise ±5 % LED current regulation independent of input voltage variation.
Can the MIC3203YM-TR operate with a 12 V AC input after rectification?
Yes-the MIC3203YM-TR can operate from rectified 12 V AC (≈17 V peak) as long as the input capacitor maintains VIN ≥ 4.5 V during valleys. Its 4.5–42 V range and 10 µF minimum input capacitance requirement accommodate typical bridge-rectified waveforms. Designers must ensure the input capacitor's ripple current rating exceeds ILED × √[D(1−D)] and use X7R/X5R ceramics per layout guidelines.
MIC3203YM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 42V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 1.5MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MIC3203YM-TR FAQ
1.How can I place an order for MIC3203YM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3203YM-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 MIC3203YM-TR reliable?
The price and inventory of MIC3203YM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3203YM-TR is usually 5 days.
3.What payment methods are accepted for MIC3203YM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3203YM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3203YM-TR?
MIC3203YM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3203YM-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 MIC3203YM-TR?
For technical support, including MIC3203YM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3203YM-TR requirements.
6.How does Aetrix verify that MIC3203YM-TR is sourced from the original manufacturer or authorized distributors?
All MIC3203YM-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 MIC3203YM-TR meets industry standards.
7.What is the process for return or replacement of MIC3203YM-TR?
All MIC3203YM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3203YM-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 MIC3203YM-TR part is unused and in its original packaging.
Return procedure for MIC3203YM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3203YM-TR Tags
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