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Microchip Technology MIC3230YTSE-TR
- Part No.:
- MIC3230YTSE-TR
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MIC3230YTSE-TR.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,359
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Product details
Overview
MIC3230YTSE-TR from Micrel is a constant-current boost switching controller designed to drive high-power LED strings in solid-state lighting systems. It operates from 6V to 45V input, delivers up to 70W output power, features ±3% 250mV feedback reference, programmable 100kHz–1MHz switching frequency, and supports PWM dimming up to 500Hz - used in street lighting and architectural LED drivers.
For engineers reviewing the MIC3230YTSE-TR datasheet, MIC3230YTSE-TR pinout, MIC3230YTSE-TR application, or MIC3230YTSE-TR equivalent, this page provides verified technical context, package mapping, real-world dimming and synchronization behavior, thermal shutdown at 150°C, and OVP/UVLO protection thresholds confirmed per official Micrel documentation.
Technical Context
The MIC3230YTSE-TR implements peak current mode control with external slope compensation (via RSLC) and internal 250mV current-sense reference for precise LED current regulation. Its gate driver delivers 2Ω source / 3.5Ω sink impedance to drive large external MOSFETs efficiently.
It supports frequency synchronization via dedicated SYNC pin (active only on MIC3230 variants), enabling noise reduction across multiple controllers. The FS pin sets oscillator frequency using an external resistor, while OVP protection triggers at 1.24V with external resistor divider configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 45V - accommodates wide-range DC inputs including 12V/24V/36V industrial and automotive supplies. |
| Feedback Reference Voltage | 250mV ±3% - enables accurate LED current setting with low-power sense resistor and minimal I²R loss. |
| Switching Frequency | 100kHz to 1MHz (programmable via FS pin resistor) - balances efficiency vs. external component size (inductor/capacitor). |
| PWM Dimming Frequency | DC to 500Hz - supports flicker-free dimming above 120Hz; maintains constant current during ON pulses. |
| OVP Threshold | 1.24V (typical) at OVP pin - protects LED string from overvoltage by regulating output when divider voltage reaches threshold. |
| Junction Temperature Range | –40°C to +125°C - rated for outdoor and high-ambient lighting environments including street and industrial fixtures. |
| Thermal Shutdown | 150°C with 5°C hysteresis - prevents damage during sustained overload or poor heatsinking conditions. |
Pinout & Package
Package: 16-pin EPAD TSSOP (exposed thermal pad), RoHS-compliant Pb-free finish, θJA = 36.5°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary supply rail (6–45V); connects to bulk input capacitor and feeds internal VDD regulator. |
| EN | Enable Control | Logic-high (>1.5V) enables operation; logic-low (<0.4V) shuts down IC with 30µA standby current. |
| PWMD | PWM Dimming Input | Accepts 0–500Hz PWM signal; controls LED brightness without shifting color temperature. |
| COMP | Compensation Node | Connects external RC network (e.g., 10nF + 10kΩ) to stabilize current loop and ensure stability across load/line variations. |
| IADJ | Current Sense Feedback | Monitors voltage across external RADJ resistor; regulates LED current to maintain 250mV at this pin. |
| FS | Frequency Select | Resistor-to-ground sets oscillator frequency (e.g., 16.5kΩ → 500kHz); enables design optimization for EMI or efficiency. |
| SYNC | Synchronization Output | Drives clock signal to other MIC3230 devices; master/slave configuration reduces system-wide conducted EMI. |
| IS | Current Sense Input | Inputs ramped voltage (VCS + slope compensation) for peak current mode control and cycle-by-cycle current limiting. |
| OVP | Over-Voltage Protection | Connects top of external resistor divider; triggers shutdown if output exceeds programmed threshold (~1.24V). |
| DRV | Gate Driver Output | Drives external N-channel MOSFET gate; 2Ω source / 3.5Ω sink impedance supports fast switching with low losses. |
| PGND | Power Ground | High-current return path for MOSFET source and output diode; must be separated from AGND for noise immunity. |
| VDD | Internal Bias Rail | Internally regulated ~5V supply; requires 10µF ceramic bypass capacitor to PGND for stable core operation. |
| EPAD | Thermal Pad | Exposed copper pad under package; must be soldered to PCB thermal plane for effective heat dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Switching Frequency | 100kHz–1MHz via single external resistor - allows trade-off between magnetic size, efficiency, and EMI compliance. |
| Peak Current Mode Control | Enables superior line transient response and simplified loop compensation vs. voltage-mode alternatives. |
| External Slope Compensation | Configured via RSLC resistor - ensures stability across full duty cycle range (up to 90%) in boost topology. |
| Integrated Soft-Start | 6µA current source charges CCOMP; prevents inrush current and output overshoot during startup. |
| Multi-Layer Protection | OVP, UVLO (4.9V turn-on), thermal shutdown (150°C), and cycle-by-cycle current limit - ensures robust field operation. |
Applications
| Street Lighting | Architectural Lighting |
|---|---|
Use Scenario: Outdoor LED luminaires powered from 24V or 36V DC distribution systems in municipal infrastructure. IC Role / Device Role / Timing Role: Constant-current boost controller regulating 350mA–700mA through 6–12 series-connected white LEDs. Use Value: Maintains consistent lumen output across wide input voltage swings and ambient temperature changes (–40°C to +125°C). |
Use Scenario: High-CRI RGB or tunable-white façade lighting with dynamic dimming and color mixing requirements. IC Role / Device Role / Timing Role: Primary LED current controller synchronized across multiple channels via SYNC pin for coherent timing. Use Value: Enables flicker-free PWM dimming >120Hz without chromatic shift, supporting smooth architectural light transitions. |
| Industrial High-Bay Fixtures | Commercial Parking Lot Lighting |
Use Scenario: 100–200W LED arrays mounted in warehouse ceilings with limited thermal headroom. IC Role / Device Role / Timing Role: High-efficiency boost controller driving parallel LED strings with external MOSFETs and thermal derating. Use Value: Thermal shutdown (150°C) and low-quiescent current (3.2mA) prevent failure during prolonged high-temperature operation. |
Use Scenario: Solar-charged battery-backed LED poles requiring wide-input operation (12–45V) and reliable dusk-to-dawn control. IC Role / Device Role / Timing Role: Input-flexible constant-current driver interfaced with photodiode-based enable logic and PWM dimming. Use Value: UVLO (4.9V) prevents brownout operation; programmable OVP protects against open-circuit LED string faults. |
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 |
|---|---|---|---|
| LM3410XMM/NOPB | Fixed 1.6MHz switching frequency; integrated MOSFET; max 1.2A output; no SYNC or dither capability. | Better suited for compact, lower-power (<25W) designs where board space limits external FET use. | Select LM3410XMM/NOPB when integrated solution suffices and higher-frequency operation is acceptable. |
| LT3756EMSE#TRPBF | Wider input (4.5–100V); supports buck, boost, SEPIC; 100V driver; higher accuracy (±1%) current sense. | Preferred for multi-topology designs, high-voltage inputs, or applications requiring tighter current regulation tolerance. | Choose LT3756EMSE#TRPBF when input exceeds 45V or dual-mode (buck-boost) flexibility is required. |
Compared with LM3410XMM/NOPB and LT3756EMSE#TRPBF, the MIC3230YTSE-TR offers unique synchronization capability for multi-channel EMI reduction, programmable frequency tuning for cost/size optimization, and proven 70W scalability with discrete FETs - making it optimal for medium-to-high-power fixed-frequency LED systems.
Availability
MIC3230YTSE-TR is available at Aetrix Electronics and suitable for street lighting, architectural LED systems, and industrial high-bay fixtures requiring stable component supply, long-term manufacturability, and automotive-grade thermal reliability.
Supply support for MIC3230YTSE-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, acquired by Microchip Technology in 2015; known for high-reliability power management and LED driver ICs.
The MIC3230YTSE-TR belongs to Micrel's constant-current LED driver family engineered specifically for high-power boost-mode solid-state lighting, emphasizing thermal robustness, EMI control, and flexible system integration.
FAQ
What is the function of the SYNC pin on the MIC3230YTSE-TR?
The SYNC pin on the MIC3230YTSE-TR is an output that enables synchronization of multiple MIC3230YTSE-TR controllers to a common switching frequency. When connected together, the highest-frequency device acts as master, overriding others' oscillators to reduce beat frequencies and system-level conducted EMI. This pin is not present on MIC3231/MIC3232 variants and must remain floating if unused.
How is LED current set in the MIC3230YTSE-TR?
LED current in the MIC3230YTSE-TR is set by the external RADJ resistor connected between IADJ and ground. Using the 250mV ±3% internal reference, current is calculated as ILED = 0.25V / RADJ. For example, a 714Ω resistor sets 350mA. Power dissipation in RADJ must be ≥ I² × R, requiring ≥¼W rating for typical values.
Does the MIC3230YTSE-TR support both boost and SEPIC topologies?
Yes, the MIC3230YTSE-TR supports both boost and SEPIC configurations. In boost mode, output voltage exceeds input; in SEPIC mode, output can be higher or lower than input - enabled by modifying external component connections per Micrel Application Note AN-27. The IC's peak current mode architecture ensures stable operation in either topology.
What protection features does the MIC3230YTSE-TR include?
The MIC3230YTSE-TR integrates overvoltage protection (OVP), under-voltage lockout (UVLO at 4.9V turn-on), thermal shutdown (150°C with 5°C hysteresis), and cycle-by-cycle current limiting. OVP is user-programmable via external resistor divider; UVLO prevents operation below safe input levels; thermal shutdown safeguards against sustained overload or poor heatsinking.
Can the MIC3230YTSE-TR operate with input voltages below 6V?
No - the MIC3230YTSE-TR has a specified minimum input voltage of 6V per its Absolute Maximum and Operating Ratings. Operation below 6V violates the device's UVLO threshold (turn-on at ~4.9V) and risks unstable regulation or failure to start. For sub-6V applications, alternative controllers such as the MIC3203 or LT3474 should be evaluated.
MIC3230YTSE-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- 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:
- 16-TSSOP-EP
MIC3230YTSE-TR FAQ
1.How can I place an order for MIC3230YTSE-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3230YTSE-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 MIC3230YTSE-TR reliable?
The price and inventory of MIC3230YTSE-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3230YTSE-TR is usually 5 days.
3.What payment methods are accepted for MIC3230YTSE-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3230YTSE-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3230YTSE-TR?
MIC3230YTSE-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3230YTSE-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 MIC3230YTSE-TR?
For technical support, including MIC3230YTSE-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3230YTSE-TR requirements.
6.How does Aetrix verify that MIC3230YTSE-TR is sourced from the original manufacturer or authorized distributors?
All MIC3230YTSE-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 MIC3230YTSE-TR meets industry standards.
7.What is the process for return or replacement of MIC3230YTSE-TR?
All MIC3230YTSE-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC3230YTSE-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 MIC3230YTSE-TR part is unused and in its original packaging.
Return procedure for MIC3230YTSE-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3230YTSE-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
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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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