Datasheet > MIC3231

MIC3231

更新时间： 2024-11-21 14:50:23

品牌	Logo	应用领域
美国微芯 - MICROCHIP		/
页数	文件大小	规格书
19页	718K
描述
The MIC3230/1/2 are constant current boost switching controllers specifically designed to power on

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MIC3231 数据手册

MIC3230/1/2

Constant Current Boost Controller for

Driving High Power LEDs

General Description

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.

Bringing the Power to Light™

Features

• 6V to 45V input supply range

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.

• 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:

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.

Over Voltage Protection (OVP)

Over temperature protection

Under-voltage Lock-out (UVLO)

• Packages:

An external resistor sets the adjustable switching

frequency of the MIC3230/1. The switching frequency can

be between 100kHz and1MHz. 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 lock-out (UVLO).

N/C

VIN

16 N/C

15 VDD

14 DRV

13 PGND

12 OVP

11 IS

VIN

12 VDD

11 DRV

10 PGND

VIN

10 VDD

DRV

PGND

OVP

PWMD

COMP

IADJ

PWMD

COMP

IADJ

PWMD

COMP

IADJ

OVP

10 SYNC/NC

EPAD

SYNC/NC

EPAD

AGND

9 N/C

MIC3232

10-pin MSOP

MIC3230/1

12-pin MLF^®

MIC3230/1

16-pin TSSOP

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.

• –40°C to +125°C junction temperature range

The MIC3232 is a 400kHz fixed frequency device offered

in a small 10-pin MSOP package. The MIC3230/1 are

offered in both the EPAD 16-pin TSSOP package and the

12-pin 3mm × 3mm MLF^®package.

Applications

• Street lighting

• Solid state lighting

• General illumination

• Architectural lighting

• Constant current power supplies

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Bringing the Power to Light is a trademark of Micrel, Inc.

MicroLeadFrame and MLF are registered trademarks of Amkor Technology.

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

M9999-030311-D

March 2011

12 3 4 5 6 7...19

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与MIC3231相关器件

型号	品牌	获取价格	描述	数据表
MIC3231YML	MICROCHIP	获取价格	SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO12
MIC3231YML	MICREL	获取价格	Constant Current Boost Controller for Driving High Power LEDs
MIC3231YMLTR	MICREL	获取价格	SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO12, 3 X 3 MM, LEAD FREE, MLF-12
MIC3231YML-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO12
MIC3231YTSE	MICREL	获取价格	Constant Current Boost Controller for Driving High Power LEDs
MIC3231YTSE	MICROCHIP	获取价格	SWITCHING CONTROLLER, 1000kHz SWITCHING FREQ-MAX, PDSO16
MIC3231YTSETR	MICREL	获取价格	IC,LASER DIODE/LED DRIVER,TSSOP,16PIN,PLASTIC
MIC3231YTSE-TR	MICROCHIP	获取价格	SWITCHING CONTROLLER
MIC3232	MICREL	获取价格	Constant Current Boost Controller for Driving High Power LEDs
MIC3232	MICROCHIP	获取价格	The MIC3230/1/2 are constant current boost switching controllers specifically designed to

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