MIC3231YTSE Micrel Inc, MIC3231YTSE Datasheet

MIC3231YTSE

Manufacturer Part Number

MIC3231YTSE

Description

Boost Driver Controller With Dither For High Power LEDs

Manufacturer

Micrel Inc

Type

High Power, Constant Currentr

Datasheet

1.MIC3232YMM.pdf (19 pages)

Specifications of MIC3231YTSE

Constant Current

Yes

Topology

PWM, Step-Up (Boost)

Number Of Outputs

Internal Driver

Yes

Type - Primary

General Purpose

Frequency

100kHz ~ 1MHz

Voltage - Supply

6 V ~ 45 V

Mounting Type

Surface Mount

Package / Case

16-TSSOP Exposed Pad, 16-eTSSOP, 16-HTSSOP

Operating Temperature

-40°C ~ 125°C

Internal Switch(s)

Yes

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Voltage - Output

Current - Output / Channel

Efficiency

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-3404-5

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC3231YTSE

Manufacturer:

MIC

Quantity:

650

Company:

Meier Automation Equipment Co., Limited

Part Number:

MIC3231YTSE

Manufacturer:

MICREL/麦瑞

Quantity:

20 000

Current page: 1 of 19
Download datasheet (719Kb)

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.

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 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).

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 10-pin MSOP package. The MIC3230/1 are

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

12-pin 3mm × 3mm MLF

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.

March 2011

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

package.

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

• PWM Dimming and separate enable shutdown

• Frequency synchronization with other MIC3230s

• Protection features:

• Packages:

PWMD

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

Applications

• Street lighting

• Solid state lighting

• General illumination

• Architectural lighting

• Constant current power supplies

COMP

IADJ

VIN

400kHz fixed frequency operation (MIC3232)

10-pin MSOP

Constant Current Boost Controller for

MIC3232

Over Voltage Protection (OVP)

Over temperature protection

Under-voltage Lock-out (UVLO)

Driving High Power LEDs

10 VDD

DRV

PGND

OVP

MIC3230/1/2

PWMD

COMP

IADJ

VIN

12-pin MLF

MIC3230/1

EPAD

Bringing the Power to Light™

VDD

DRV

PGND

OVP

SYNC/NC

M9999-030311-D

PWMD

COMP

AGND

IADJ

N/C

VIN

16-pin TSSOP

MIC3230/1

EPAD

16 N/C

VDD

DRV

PGND

OVP

SYNC/NC

N/C

Related parts for MIC3231YTSE

MIC3231YTSE Summary of contents

Page 1

... 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 March 2011 ...

Page 2

... Product Option Matrix Input Voltage Synchronization Dither Frequency Range Adj from 100kHz to 1MHz 16-pin EPAD TSSOP Package 12-pin 3mm × 3mm MLF Ordering Information Part Number MIC3230YTSE MIC3230YML MIC3231YTSE MIC3231YML MIC3232YMM March 2011 L 47µH VIN EN OVP PWMD SYNC DRV MIC3230/31 ...

Page 3

Micrel, Inc. Pin Configuration VIN 1 10 VDD DRV PWMD 3 8 PGND COM OVP IADJ 10-Pin MSOP (MM) MIC3232 Pin Description Pin Number Pin Number ® MLF TSSOP -- 1 ...

Page 4

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) .....................................................+48V IN Enable Pin Voltage........................................... -0.3V to +6V IADJ Voltage ..................................................................+6V Lead Temperature (soldering, sec.) ........................... 260°C Storage Temperature (Ts)..........................-65°C to +150°C (3) ESD Rating MIC3230 ....................................... 1500V HB, 100VMM MIC3232 ...

Page 5

Micrel, Inc. Electrical Characteristics (Continued) Symbol Parameter V Over Voltage Protection OVP Driver Impedance V Driver Voltage High DRH T Over-Temperature Threshold J Shutdown Thermal Shutdown March 2011 Condition Sink Source V = 12V IN Hysteresis 5 MIC3230/1/2 Min Typ ...

Page 6

Micrel, Inc. Typical Characteristics March 2011 6 MIC3230/1/2 M9999-030311-D ...

Page 7

Micrel, Inc. March 2011 12.2 12.15 12.1 12.05 12 11.95 11.9 11.85 11 MIC3230/1/2 Load Regulation V 3. 100 125 150 LOAD (mA) M9999-030311-D ...

Page 8

Micrel, Inc. Functional Description A constant output current converter is the preferred method for driving LEDs. Small variations in current have a minimal effect on the light output, whereas small variations in voltage have a significant impact on light output. ...

Page 9

Micrel, Inc. Power Topology Constant Output Current Controller The MIC323x family is peak current mode boost controllers designed to drive high power LEDs. Unlike a standard constant output voltage controller, the MIC323x family has been designed to provide a constant ...

Page 10

Micrel, Inc. Dithering (MIC3231 Only) The MIC3231 has a feature which dithers the switching frequency by ±12%. The purpose of this dithering is to help achieve a spread spectrum of the conducted EMI noise. This can allow for an overall ...

Page 11

Micrel, Inc. Leading Edge Blanking Large transient spikes due to the reverse recovery of the diode may be present at the leading edge of the current sense signal. (Note: drive current can also cause such spikes) For this reason a ...

Page 12

Micrel, Inc. Figure 6. IS Pin and V Design Procedure for a LED Driver Symbol Parameter Input V Input Voltage IN I Input current IN Output LEDs Number of LEDs V Forward voltage of LED F V Output voltage OUT ...

Page 13

Micrel, Inc. VIN CIN 4.7µF/50v R2 100k ENABLE PWMD Synch to other MIC3230 RFS 16.5k CCOMP 10nF C3 10µF 10V Analog ground Design Example In this example, we will be designing a boost LED driver operating off a 12V input. ...

Page 14

Micrel, Inc. (see the current waveforms in Figure 5). It can be difficult to find large inductor values with high saturation currents in a surface mount package. Due to this, the percentage of the ripple current may be limited by ...

Page 15

Micrel, Inc. Maximum Power dissipated Eq. (17) = × RMS Eq. (18 FET _ RMS _ max CS _ RMS _ max ⎛ 2 ...

Page 16

Micrel, Inc. Qg Eq. (26) ≈ t transition _ max Igatedrv where Qg is the total gate charge of the external MOSFET provided by the MOSFET manufacturer and the Qg should chosen exact value, but is ...

Page 17

Micrel, Inc. Package Information March 2011 10-Pin MSOP (MM) 17 MIC3230/1/2 M9999-030311-D ...

Page 18

Micrel, Inc. March 2011 ® 12-Pin 3mm × 3mm MLF (ML) 18 MIC3230/1/2 M9999-030311-D ...

Page 19

Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in ...

Related keywords

MIC3231YTSE datasheet
MIC3231YTSE data sheet
MIC3231YTSE pdf datasheet
MIC3231YTSE component
MIC3231YTSE part
MIC3231YTSE distributor
MIC3231YTSE RoHS
MIC3231YTSE datasheet download