Diodes AL8812 Manuel d'utilisateur télécharger pdf

AL8812

Document number: DS37099 Rev. 1 - 2

1 of 11

www.diodes.com

March 2014

L8812

BOOST/BUCK DC-DC CONVERTER FOR DIMMABLE MR16 LED LAMPS

Description

The AL8812 is a monolithic control circuit containing the primary

functions required for DC-to-DC converters with MOSFET in one

package. These devices consist of an internal temperature

compensated reference, comparator, controlled duty cycle oscillator

with an active current limit circuit, driver and high current output

switch. Additionally a 60V, 3.6A MOSFET is integrated for reduced

BOM cost and size. This series is specifically designed for buck and

boost applications with a minimum number of external components.

Features

• Operation from 3.0V to 20V Input

• Integrated 60V, 3.6A MOSFET

• Low Standby Current

• Current Limiting

• Output Voltage Adjustable

• Frequency Operation to 100 kHz

• Precision 2% Reference

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Pin Assignments

Applications

• Low Voltage LED Lighting such as MR-16

• General Purpose DC-DC Converter

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"

and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and

<1000ppm antimony compounds.

Typical Applications Circuit

Dimmable MR-16 LED Driver System Diagram

(For detailed schematic please contact your Diodes Sales Representative)

GATE

INPUT

VCC

SENSE

DRIVE

SW/C

SW/E

GND

TIMING

SOURCE

DRAIN

U-DFN6040-12

1 2 3 4 5 6 ... 10 11

Résumé du contenu

AL8812 Document number: DS37099 Rev. 1 - 2 1 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 BOOST/BUCK DC-DC CONVERTER FOR DIMMABLE M

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AL8812 Document number: DS37099 Rev. 1 - 2 10 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Ordering Information Part Number Pack

Page 3

AL8812 Document number: DS37099 Rev. 1 - 2 11 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Suggested Pad Layout Please see AP02001 a

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AL8812 Document number: DS37099 Rev. 1 - 2 2 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Pin Descriptions Pin Name Pin Number (U-DF

Page 5

AL8812 Document number: DS37099 Rev. 1 - 2 3 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Absolute Maximum Ratings (@TA = +25°C, unl

Page 6

AL8812 Document number: DS37099 Rev. 1 - 2 4 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812Performance Characteristics Figure 1. Vce

Page 7 - Boost Converter

AL8812 Document number: DS37099 Rev. 1 - 2 5 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 0. 1 1 100.11100.1 1 100.111023 450.1110-

Page 8 - Buck Converter

AL8812 Document number: DS37099 Rev. 1 - 2 6 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Typical Application Circuits Circuits show

Page 9 - Design Formula Table

AL8812 Document number: DS37099 Rev. 1 - 2 7 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Typical Application Circuits (cont.) Boos

Page 10 - Seating Plane

AL8812 Document number: DS37099 Rev. 1 - 2 8 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Typical Application Circuits (cont.) Buc

Page 11 - Suggested Pad Layout

AL8812 Document number: DS37099 Rev. 1 - 2 9 of 11 www.diodes.com March 2014© Diodes Incorporated AL8812 Design Formula Table Calculation Boost

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