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Microchip Technology MIC3230YML-TR
- Part No.:
- MIC3230YML-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 12-VFDFN Exposed Pad, 12-MLF®
- Datasheet:
-
MIC3230YML-TR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 12MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,274
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Product details
Overview
MIC3230YML-TR from Microchip (acquired Micrel) is a constant-current boost switching controller for high-power LED strings, featuring 6V–45V input range, programmable 100kHz–1MHz switching frequency via external resistor, 250mV ±3% feedback reference, and integrated gate driver capable of delivering up to 70W with external MOSFET. It supports PWM dimming up to 500Hz and enables system-level noise reduction via frequency synchronization across multiple ICs.
For engineers reviewing the MIC3230YML-TR datasheet, MIC3230YML-TR pinout, MIC3230YML-TR application, or MIC3230YML-TR equivalent, this device serves as a precision current-regulated boost controller in street lighting, architectural illumination, and industrial solid-state lighting systems where input voltage variation, thermal stability, and EMI control are critical design constraints.
Technical Context
The MIC3230YML-TR implements peak current mode control with external slope compensation (via RSLC), enabling stable operation across wide duty cycles and fast line transient response. Its IS pin combines current sensing (0.45V current limit threshold) and ramp generation (250µA/T) for slope compensation - both functions validated per Figure 4 and Equation 6 in the datasheet.
It features a dedicated SYNC output pin (Pin 7 in MLF® package) allowing master-slave synchronization of multiple MIC3230 units to reduce beat frequencies and conducted EMI; this capability is exclusive to MIC3230 and not available on MIC3231/MIC3232 variants. The internal 2Ω source / 3.5Ω sink gate driver (DRV pin) drives external N-channel MOSFETs with minimal switching loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 45V - accommodates 12V/24V/36V industrial and automotive power rails without pre-regulation. |
| Feedback Reference | 250mV ±3% - enables precise LED current setting with low-value sense resistors (e.g., 0.71Ω for 350mA), minimizing I²R loss. |
| Switching Frequency | 100kHz to 1MHz (programmable via FS pin resistor) - allows trade-off between efficiency (lower fSW) and component size (higher fSW). |
| Current Limit Threshold | 0.45V at IS pin - sets overcurrent protection point independent of temperature, supporting robust short-circuit and open-LED fault handling. |
| OVP Reference | 1.24V - programmable output overvoltage protection prevents LED string damage during open-load conditions. |
| Thermal Shutdown | 150°C with 5°C hysteresis - ensures safe operation under sustained high-power or poor heatsinking conditions. |
| PWM Dimming Range | 0–500Hz - supports flicker-free dimming above 120Hz while maintaining constant current per pulse. |
Pinout & Package
The MIC3230YML-TR is housed in a 12-pin 3mm × 3mm MLF® (MicroLeadFrame) package with exposed EPAD thermally connected to AGND. Pin 1 is IADJ; Pin 5 is FS; Pin 7 is SYNC; Pin 8 is IS; Pin 12 is EPAD.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IADJ (Pin 1) | Current sense feedback input | Connects to voltage drop across RADJ resistor; regulates LED current by holding 250mV at this node. |
| IS (Pin 8) | Current sense and slope compensation input | Monitors FET source current via RCS; sources 250µA/T ramp for slope compensation through RSLC. |
| VIN (Pin 2) | Main power input | Accepts 6V–45V unregulated DC; powers internal circuitry and gate driver via VDD regulator. |
| EN (Pin 3) | Enable control input | Logic-high (≥1.5V) enables operation; logic-low (≤0.4V) shuts down quiescent current to 30µA. |
| PWMD (Pin 4) | PWM dimming input | Accepts 0–500Hz PWM signal; modulates LED brightness without altering current magnitude per ON-cycle. |
| FS (Pin 5) | Frequency select input | Resistor-to-GND sets oscillator frequency from 100kHz to 1MHz - determines inductor size and efficiency. |
| SYNC (Pin 7) | Synchronization output | Drives clock signal to other MIC3230s; enables deterministic multi-phase operation and EMI reduction. |
| OVP (Pin 9) | Overvoltage protection input | Connects to top of resistor divider from VOUT; triggers shutdown when divided voltage reaches 1.24V. |
| DRV (Pin 11) | Gate drive output | Low-impedance (2Ω source / 3.5Ω sink) output driving external N-MOSFET gate directly. |
| EPAD (Pin 12) | Thermal pad / AGND connection | Must be soldered to PCB copper pour tied to analog ground for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable switching frequency | 100kHz–1MHz via single external resistor - enables optimization of magnetic component size vs. conduction/switching loss balance. |
| Peak current mode control | Internal slope compensation + cycle-by-cycle current limiting - provides inherent line regulation and simplified loop compensation. |
| Multi-device synchronization | Dedicated SYNC output pin - eliminates beat frequencies in multi-channel LED drivers, reducing conducted EMI peaks by >10dB. |
| Ultra-precise current regulation | 250mV ±3% reference with <2% load/line regulation - ensures consistent lumen output across input and load variations. |
| Integrated protection suite | OVP, UVLO (4.9V turn-on), thermal shutdown (150°C), and current limiting - eliminates need for external fault management circuitry. |
Applications
| Street Lighting | Architectural Lighting |
|---|---|
Use Scenario: Outdoor LED luminaires powered from 24V or 36V DC distribution lines with variable ambient temperature (-40°C to +85°C). IC Role / Device Role / Timing Role: Constant-current boost controller regulating 700mA LED string at up to 60V output, synchronized across multiple poles to suppress 100/120Hz ripple and EMI. Use Value: Maintains consistent light output despite battery voltage sag or solar charger fluctuations; thermal shutdown prevents thermal runaway in enclosed fixtures. | Use Scenario: RGBW façade lighting with individually addressable zones requiring uniform brightness and color fidelity. IC Role / Device Role / Timing Role: High-efficiency boost driver for white LED channels, using PWM dimming (200Hz) to avoid visible flicker while preserving CCT stability. Use Value: 250mV feedback reference minimizes sense resistor power loss (<0.25W at 1A), enabling compact thermal design in space-constrained mounting profiles. |
| Industrial Machine Vision | Commercial Parking Lot Lighting |
Use Scenario: High-intensity strobed LED arrays used in automated inspection systems requiring microsecond-level timing accuracy. IC Role / Device Role / Timing Role: Fast-response boost controller with soft-start and leading-edge blanking, driven by external trigger for precise exposure control. Use Value: Leading-edge blanking (100ns) rejects diode reverse-recovery spikes, ensuring stable current sensing during rapid ON/OFF transitions. | Use Scenario: Pole-mounted LED fixtures operating from 12V lead-acid or 48V lithium battery banks with wide voltage swing (10V–58V). IC Role / Device Role / Timing Role: Input-wide-range boost controller supporting 6V–45V operation, with UVLO hysteresis preventing brownout oscillation during battery discharge. Use Value: 4.9V UVLO turn-on threshold ensures reliable startup even with aged batteries; 30µA shutdown current extends off-grid runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current boost LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM3410XMM/NOPB | Fixed 1.6MHz switching frequency; no SYNC or dither; 2.7V–5.5V input only - incompatible with 6V–45V requirement. | Targeted at low-voltage portable LED apps (e.g., flashlights); unsuitable for 24V+ industrial lighting. | Select MIC3230YML-TR when input exceeds 5.5V or synchronization is required; LM3410XMM is viable only for sub-6V designs. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100; integrated MOSFET; 4.5V–65V input; but fixed 500kHz fSW and no SYNC output. | Designed for automotive headlamps with built-in diagnostics; lacks multi-IC sync for large-area lighting systems. | Choose MIC3230YML-TR for non-automotive, multi-channel synchronized lighting; TPS92630QPWPRQ1 fits automotive BOMs needing integrated FET and ASIL-B compliance. |
Compared with LM3410XMM/NOPB and TPS92630QPWPRQ1, the MIC3230YML-TR uniquely supports wide-input (6V–45V), programmable frequency, and deterministic multi-unit synchronization - making it the only option among the three for scalable, thermally robust, and EMI-controlled high-power LED installations.
Availability
MIC3230YML-TR is available at Aetrix Electronics and suitable for street lighting, architectural illumination, and industrial machine vision applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC3230YML-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 acquired Micrel in 2015 and maintains full technical support and manufacturing continuity for the MIC3230 family. Micrel was a leader in analog power management and LED driver ICs before acquisition.
The MIC3230 product line was designed specifically for high-efficiency, constant-current boost conversion in solid-state lighting systems - emphasizing thermal resilience, EMI control via synchronization, and flexible current programming for diverse LED configurations.
FAQ
What is the maximum output power achievable with the MIC3230YML-TR?
The MIC3230YML-TR supports up to 70W output power when paired with an appropriately rated external MOSFET, inductor, and diode. This is achieved under optimal thermal conditions (TJ ≤ 125°C), with 12V input, 60V output, and 1.17A LED current. Power delivery depends on layout, heatsinking, and component selection - the IC itself does not integrate power switches.
Does the MIC3230YML-TR support SEPIC topology in addition to boost?
Yes, the MIC3230YML-TR can be configured as a SEPIC converter per the Functional Description section (page 8). Its peak current mode architecture and external switch control allow both boost (VOUT > VIN) and SEPIC (VOUT > or < VIN) operation, enabling flexibility in systems where input voltage may exceed output requirements.
How is the switching frequency programmed on the MIC3230YML-TR?
The switching frequency of the MIC3230YML-TR is set by connecting an external resistor (RFS) between the FS pin (Pin 5) and PGND. Using Equation 4 from the datasheet - fSW(kHz) = 7526 / (1.035 × RFS(kΩ)) - a 16.5kΩ resistor yields ~500kHz. Values from 8.25kΩ (1MHz) to 82.5kΩ (100kHz) are supported.
Can the MIC3230YML-TR be used without synchronization in a single-channel design?
Yes, the MIC3230YML-TR operates fully autonomously without SYNC connection. The SYNC pin (Pin 7) is an output and may be left floating if unused. Synchronization is optional and only required when coordinating multiple MIC3230YML-TR units to reduce EMI or enable interleaved operation.
What is the purpose of the IS pin on the MIC3230YML-TR, and how does it differ from IADJ?
The IS pin (Pin 8) senses the voltage across the external current-sense resistor (RCS) to implement cycle-by-cycle current limiting and provide slope compensation current (250µA/T). In contrast, IADJ (Pin 1) senses the voltage across the LED current-setting resistor (RADJ) to regulate average LED current at 250mV. They serve distinct roles: IS for dynamic protection and stability, IADJ for steady-state current accuracy.
MIC3230YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 12-VFDFN Exposed Pad, 12-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Controller
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 6V
- Voltage - Supply (Max):
- 45V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 100kHz ~ 1MHz
- Dimming:
- PWM
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 12-MLF™ (4x4)
MIC3230YML-TR FAQ
1.How can I place an order for MIC3230YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3230YML-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 MIC3230YML-TR reliable?
The price and inventory of MIC3230YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3230YML-TR is usually 5 days.
3.What payment methods are accepted for MIC3230YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3230YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3230YML-TR?
MIC3230YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3230YML-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 MIC3230YML-TR?
For technical support, including MIC3230YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3230YML-TR requirements.
6.How does Aetrix verify that MIC3230YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC3230YML-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 MIC3230YML-TR meets industry standards.
7.What is the process for return or replacement of MIC3230YML-TR?
All MIC3230YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3230YML-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 MIC3230YML-TR part is unused and in its original packaging.
Return procedure for MIC3230YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3230YML-TR Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
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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
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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