My Inquiry
My Account
Microchip Technology MIC3230YTSE
- Part No.:
- MIC3230YTSE
- Manufacturer:
- Microchip Technology
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
MIC3230YTSE.pdf
- Description:
- IC LED DRIVER CTRLR PWM 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,187
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC3230YTSE 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–45V input, delivers up to 70W via external MOSFET, features ±3% 250mV feedback reference, programmable 100kHz–1MHz switching frequency (set by external resistor), and supports PWM dimming up to 500Hz for precise brightness control in street and architectural lighting.
For engineers reviewing the MIC3230YTSE datasheet, MIC3230YTSE pinout, MIC3230YTSE application, or MIC3230YTSE equivalent, this page provides verified technical context, validated pin functions, confirmed protection features (OVP, UVLO, thermal shutdown), real-world design constraints (e.g., slope compensation via RSLC, IS pin current sensing), and direct alternative part comparisons - all specific to the 16-pin EPAD TSSOP package with Pb-free finish and –40°C to +125°C operation.
Technical Context
The MIC3230YTSE implements peak current mode control with internal slope compensation set by an external resistor (RSLC) connected to the IS pin, enabling stable operation across wide duty cycles (up to 90%). Its gate driver delivers 2Ω source / 3.5Ω sink impedance to efficiently switch large external MOSFETs.
It uses a 250mV ±3% precision feedback reference at the IADJ pin to regulate LED current, while OVP protection triggers at 1.24V on the OVP pin using an external resistor divider. The SYNC pin enables frequency synchronization between multiple MIC3230YTSE units to reduce system-level EMI, and the FS pin sets oscillator frequency via resistor value per Equation 4 (e.g., 16.5kΩ → 500kHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6V to 45V - supports wide-range DC inputs including 12V/24V/36V industrial and automotive supplies. |
| Feedback Reference Voltage | 250mV ±3% - enables accurate LED current regulation with low-power sense resistor (e.g., 0.71Ω for 350mA). |
| Switching Frequency | 100kHz to 1MHz (programmable via FS pin resistor) - allows trade-off between efficiency (lower fSW) and component size (higher fSW). |
| Max Output Power | 70W - achieved using external power FET; IC itself handles control only, not power dissipation. |
| PWM Dimming Frequency | DC to 500Hz - supports flicker-free dimming above 120Hz; maintains constant current during ON pulses. |
| OVP Threshold | 1.24V (typical) on OVP pin - protects LED string from overvoltage failure when load disconnects or output rises. |
| Junction Temperature Range | –40°C to +125°C - qualified for outdoor lighting and high-ambient industrial environments. |
Pinout & Package
The MIC3230YTSE is housed in a 16-pin EPAD TSSOP package with exposed thermal pad (EPAD) connected to AGND for enhanced thermal performance (θJA = 36.5°C/W). Pin numbering follows standard TSSOP layout with Pin 1 at top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power Input | Primary supply rail (6–45V); powers internal circuitry and gate driver via VDD regulator. |
| EN | Enable Control Input | Logic-high ≥1.5V enables operation; logic-low ≤0.4V shuts down IC with 30µA quiescent current. |
| PWMD | PWM Dimming Input | Accepts 0–500Hz PWM signal; controls LED brightness without altering current magnitude. |
| COMP | Compensation Output | Connects to external RC network (e.g., 10nF + 10kΩ) to stabilize current loop; soft-start begins when COMP reaches ~0.7V. |
| IADJ | Current Sense Feedback Input | Monitors voltage across external RADJ resistor; regulates LED current to maintain 250mV at this pin. |
| FS | Frequency Select Input | Resistor-to-ground sets oscillator frequency (e.g., 16.5kΩ → 500kHz); enables optimization of efficiency vs. BOM cost. |
| IS | Current Sense Input | Inputs voltage across external RCS resistor; provides pulse-by-pulse current limiting and slope compensation ramp. |
| OVP | OVP Divider Output | Connects to top of external resistor divider; trips at 1.24V to clamp output voltage during open-load fault. |
| PGND | Power Ground | Return path for high-current gate drive and external FET source; must be separated from AGND for noise immunity. |
| DRV | Gate Drive Output | Drives external N-channel MOSFET gate; 2Ω source / 3.5Ω sink impedance supports fast switching with low losses. |
| VDD | VDD Filter Pin | Internal LDO output; requires 10µF ceramic capacitor to GND; no external load permitted. |
| SYNC | Synchronization Output | Outputs clock signal to synchronize multiple MIC3230YTSE devices; master/slave topology reduces conducted EMI. |
| EPAD | Thermal Pad | Exposed copper pad under package; must be soldered to PCB ground plane for thermal management and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Peak Current Mode Control | Enables superior line transient response and simplified loop compensation versus voltage-mode alternatives. |
| Programmable Switching Frequency | 100kHz–1MHz range via single external resistor - balances efficiency (low fSW) and magnetics size (high fSW). |
| Integrated Slope Compensation | External RSLC sets ramp slope; prevents subharmonic oscillation across full duty cycle range (0–90%). |
| Multi-Device Synchronization | SYNC pin allows daisy-chaining of multiple MIC3230YTSE controllers to align switching edges and suppress beat frequencies. |
| Comprehensive Protection Suite | OVP (1.24V threshold), UVLO (4.9V turn-on), thermal shutdown (150°C), and cycle-by-cycle current limiting (0.45V IS threshold). |
Applications
| Street Lighting | Architectural Lighting |
|---|---|
Use Scenario: Outdoor LED luminaires powered from 24V or 36V DC distribution systems, operating continuously in ambient temperatures from –40°C to +85°C. IC Role / Device Role / Timing Role: Constant-current boost controller regulating 350mA–700mA through 5–12 series-connected white LEDs. Use Value: Enables high-efficiency (>80%) operation with minimal thermal derating due to EPAD-enhanced thermal resistance (36.5°C/W). |
Use Scenario: Color-tunable RGBW façade lighting where consistent current matching across parallel LED strings is critical for uniform chromaticity. IC Role / Device Role / Timing Role: Synchronized multi-channel LED driver using SYNC pins to eliminate beat-frequency artifacts in high-density installations. Use Value: Eliminates visible flicker and EMI coupling between adjacent drivers via deterministic phase alignment. |
| Industrial High-Bay Lighting | Transportation Signage |
Use Scenario: Warehouse lighting fixtures requiring robust operation under 12V–45V input variations and frequent on/off cycling. IC Role / Device Role / Timing Role: Primary LED current controller with soft-start (via CCOMP) limiting inrush current during cold-start conditions. Use Value: Prevents fuse blowing and contactor arcing during repeated power cycling in automated facilities. |
Use Scenario: DOT-compliant vehicle signage using high-brightness LEDs powered from 12V/24V battery systems with load-dump transients. IC Role / Device Role / Timing Role: Overvoltage-protected boost controller maintaining regulated current despite input spikes up to +48V absolute max. Use Value: Survives ISO 7637-2 Load Dump events without latch-up or damage thanks to 48V VIN rating and OVP clamping. |
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 1.5A MOSFET; lower max input (24V); no SYNC or dither capability. | Better suited for compact, low-power (<15W) portable LED designs; lacks multi-unit synchronization and high-voltage tolerance. | Select when board space is constrained and input voltage stays below 24V; avoid for 36V+ or synchronized multi-channel systems. |
| TPS92630QPWPRQ1 | Automotive-grade AEC-Q100; integrated high-side current sense; 4.5–40V input; no external FET drive; fixed 600kHz fSW. | Designed for automotive headlamp modules; includes diagnostic flags and fault reporting; no programmable frequency or SYNC. | Choose for ASIL-B compliant vehicle lighting; not suitable for non-automotive use or designs requiring external FET flexibility. |
Compared with LM3410XMM/NOPB and TPS92630QPWPRQ1, the MIC3230YTSE uniquely supports 6–45V input, external FET selection for >70W scalability, programmable frequency tuning, and multi-device synchronization - making it optimal for industrial and outdoor LED systems demanding robustness, thermal headroom, and EMI control.
Availability
MIC3230YTSE is available at Aetrix Electronics and suitable for street lighting, architectural illumination, and industrial high-bay LED systems requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for MIC3230YTSE 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 acquired by Microchip Technology in 2015; its LED driver portfolio emphasizes high-reliability, thermally robust solutions for harsh-environment lighting.
The MIC3230YTSE belongs to Micrel's constant-current boost controller product line, engineered specifically for high-power solid-state lighting applications where input voltage range, thermal resilience, and EMI-controlled multi-unit operation are critical design requirements.
FAQ
What is the maximum LED string voltage supported by the MIC3230YTSE?
The MIC3230YTSE is a boost controller with no intrinsic output voltage limit - its maximum LED string voltage depends on external component ratings. In typical designs, output voltages up to 100V are achievable using appropriately rated diodes, capacitors, and MOSFETs. The OVP circuit triggers at 1.24V on the OVP pin, so the actual clamping point is set by the external resistor divider (e.g., R8/R9 in Figure 1); for a 30V OVP point, R9 = (1.245V / 30V − 1) × R8. Always verify external component voltage ratings exceed the intended VOUT.
How does the MIC3230YTSE implement current regulation for LED strings?
The MIC3230YTSE regulates LED current by maintaining a precise 250mV ±3% voltage across the external RADJ resistor connected to the IADJ pin. This creates a closed-loop control where the IC adjusts the duty cycle of the external MOSFET (driven by DRV) to hold ILED = 0.25V / RADJ. The IS pin monitors the inductor current via RCS for cycle-by-cycle limiting, while slope compensation (set by RSLC) ensures stability across the full operating range. No analog current-setting DAC or digital interface is involved - regulation is purely analog and resistor-based.
Can the MIC3230YTSE be used in SEPIC topology, and what modifications are required?
Yes, the MIC3230YTSE supports SEPIC configuration per its functional description, enabling output voltages both above and below VIN. To implement SEPIC, replace the boost inductor with coupled inductors (or two separate inductors), reconfigure the diode and capacitor connections per standard SEPIC layout, and retain the same RADJ, RCS, RSLC, and compensation network values. The IC's peak current mode architecture and 250mV feedback reference remain fully applicable; however, slope compensation calculation must account for SEPIC-specific ripple characteristics, and the OVP divider must be referenced to the correct node.
What is the purpose of the SYNC pin on the MIC3230YTSE, and how should it be terminated if unused?
The SYNC pin on the MIC3230YTSE outputs a clock signal that allows multiple MIC3230YTSE controllers to operate at identical switching frequencies and aligned phases, reducing beat-frequency EMI and improving system-level noise performance. When unused, the SYNC pin must be left floating (unconnected) - do not tie it to GND, VDD, or any other voltage. Connecting it to another MIC3230YTSE's SYNC pin establishes master-slave synchronization, where the highest-frequency unit becomes the master; mismatched frequencies may cause instability if not properly configured.
Does the MIC3230YTSE require external slope compensation, and how is RSLC calculated?
Yes, the MIC3230YTSE requires external slope compensation via resistor RSLC connected to the IS pin to ensure stable peak current mode operation across all duty cycles. RSLC is calculated using Equation 6 from the datasheet: RSLC = (250μA × L × (VOUT_MAX − VIN_MIN)) / (fSW × RCS), where L is inductance, fSW is switching frequency, and RCS is the current sense resistor. For example, with 47μH inductor, 500kHz fSW, 28V VOUT_MAX, 8V VIN_MIN, and 150mΩ RCS, RSLC ≈ 511Ω. Standard-value resistors should be selected, and actual current limit must be re-verified after component selection.
MIC3230YTSE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MIC3230YTSE through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC3230YTSE 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 reliable?
The price and inventory of MIC3230YTSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC3230YTSE is usually 5 days.
3.What payment methods are accepted for MIC3230YTSE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC3230YTSE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC3230YTSE?
MIC3230YTSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC3230YTSE 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?
For technical support, including MIC3230YTSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC3230YTSE requirements.
6.How does Aetrix verify that MIC3230YTSE is sourced from the original manufacturer or authorized distributors?
All MIC3230YTSE 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 meets industry standards.
7.What is the process for return or replacement of MIC3230YTSE?
All MIC3230YTSE units undergo pre-shipment inspection (PSI). If there is an issue with MIC3230YTSE, 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 part is unused and in its original packaging.
Return procedure for MIC3230YTSE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC3230YTSE Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
