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MIC3232

400kHz Fixed Frequency Boost Driver Controller for High Power LEDs

Status: In Production

Features:

  • 6V to 45V input supply range
  • Capable of driving up to 70W
  • Ultra-low EMI via dithering on the MIC3231
  • Programmable LED drive current
  • Feedback voltage = 250mV ±3%
  • Programmable switching frequency (MIC3230/1) or 400kHz fixed frequency operation (MIC3232)
  • PWM dimming and separate enable shutdown
  • Frequency synchronization with other MIC3230s
  • Protection features:
  • Over voltage protection (OVP)
  • Over-temperature protection
  • Under voltage lockout (UVLO)
  • -40°C to +125°C junction temperature range
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Overview
Documents
Development Environment
Similar Devices
RoHS Information
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Device Overview

Summary

The MIC3230/1/2 are constant current boost switching controllers specifically designed to power one or more strings of high power LEDs. The MIC3230/1/2 have an input voltage range from 6V to 45V and are ideal for a variety of solid state lighting applications.

The MIC3230/1/2 utilizes an external power device which offers a cost conscious solution for high power LED applications. The powerful drive circuitry can deliver up to 70W to the LED system. Power consumption has been minimized through the implementation of a 250mV feedback voltage reference providing an accuracy of ±3%. The MIC323x family is dimmable via a pulse width modulated (PWM) input signal and also features an enable pin for low power shutdown.

Multiple MIC3230 ICs can be synchronized to a common operating frequency. The clocks of these synchronized devices can be used together in order to help reduce noise and errors in a system.

An external resistor sets the adjustable switching frequency of the MIC3230/1. The switching frequency can be between 100kHz and 1MHz. Setting the switching frequency provides the mechanism by which a design can be optimized for efficiency (performance) and size of the external components (cost). The MIC323x family of LED drivers also offer the following protection features: Over voltage protection (OVP), thermal shutdown and under voltage lockout (UVLO).

The MIC3231 offers a dither feature to assist in the reduction of EMI. This is particularly useful in sensitive EMI applications, and provides for a reduction or emissions by approximately 10dB.

The MIC3232 is a 400kHz fixed frequency device offered in a small MSOP-10 package. The MIC3230/1 are offered in ePad TSSOP-16 package.

Additional Features
    • 6V to 45V input supply range
    • Capable of driving up to 70W
    • Ultra-low EMI via dithering on the MIC3231
    • Programmable LED drive current
    • Feedback voltage = 250mV ±3%
    • Programmable switching frequency (MIC3230/1) or 400kHz fixed frequency operation (MIC3232)
    • PWM dimming and separate enable shutdown
    • Frequency synchronization with other MIC3230s
    • Protection features:
      • Over voltage protection (OVP)
      • Over-temperature protection
      • Under voltage lockout (UVLO)
    • -40°C to +125°C junction temperature range
Parametrics
Name
Value
Topology
Boost
+Vin min (V)
6
+Vin max (V)
45
Output Current
External FET
Dimming
PWM
Package
MSOP
Product Type
High Brightness
Type
Boost & SEPIC
# of White LEDs
Up to 20 or more
Operating Iq (µA)
3.2
Vfb (V)
0.25
Switching Frequency
400kHz
Switching MOSFET
External
ILED Accuracy
±3%
Θja (C/W)
130.5

Documents

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Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MIC3231TE-Sepic Evaluation Board
MIC3231TE-Sepic Evaluation Board ( MIC3231TE-SEPIC-EV )

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MIC3232YMM Evaluation Board
MIC3232YMM Evaluation Board ( MIC3232YMM-EV )

The MIC3232 is a constant current boost switching controller specifically designed to power one or more strings of high power LEDs. The MIC3232 has an input voltage range from 6V to 45V and is ideal for a variety of applications.

Learn More
Add To Cart

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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (Kg)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC3232YMM
0.024500
0.135600
10
MSOP
3x3x1.0mm
NiPdAu
e4
MIC3232YMM-TR
0.024500
0.431180
10
MSOP
3x3x1.0mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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