Diodes AP8802H Uživatelský manuál stáhnout pdf

AP8802H

60V 1A LED STEP-DOWN CONVERTER

AP8802H

Document number: DS32227 Rev. 6 - 2

1 of 14

www.diodes.com

May 2012

PRELIMINARY

NEW PRODUCT

Description

The AP8802H is a step-down DC/DC converter designed to drive

LEDs with a constant current. The device can drive up to thirteen

LEDs, depending on the forward voltage of the LEDs, in series from

a voltage source of 8V to 60V. Series connection of the LEDs

provides identical LED currents resulting in uniform brightness and

eliminating the need for ballast resistors. The AP8802H switches at

frequency up to 700kHz. This allows the use of small size external

components, hence minimizing the PCB area needed.

Maximum output current of AP8802H is set via an external resistor

connected between the V

and SET input pins. Dimming is

achieved by applying either a DC voltage or a PWM signal at the

CTRL input pin. An input voltage of 0.2V or lower at CTRL shuts

down the output at SW and puts the device into a low-current

standby state.

Features

• LED driving current up to 1A

• High efficiency up to 95%

• Operating input voltage up to 60V

• 5% nominal accuracy

• High switching frequency up to 700kHz

• PWM/DC input for dimming control

• Built-in output open-circuit protection

• SO-8EP is available in “Green” Molding Compound (No Br, Sb)

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

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

Pin Assignments

SET

GND

CTRL

GND

SO-8EP

(Top View)

AP8802H

Applications

• Commercial & industrial lighting

• Small LCD panel backlight

• Appliances interior lighting

• Architecture Detail lighting

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 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 Application Circuit

48V

2.2µF

68µF

SET

0.33

PDS3200

P8802H

GND

CTRL

SET

1 2 3 4 5 6 ... 13 14

Shrnutí obsahu

Strany 1 - AP8802H

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 1 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 2

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 10 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINA

Strany 3 - = 12V, T

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 11 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINA

Strany 4

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 12 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINA

Strany 5 - = +25°C, V

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 13 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINA

Strany 6

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 14 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINA

Strany 7

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 2 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 8

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 3 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 9 - PWM Dimming of LED Current

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 4 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 10 - Thermal Considerations

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 5 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 11 - Fault Condition Operation

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 6 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 12 - SO-8EP

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 7 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 13

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 8 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

Strany 14

AP8802H60V 1A LED STEP-DOWN CONVERTER AP8802H Document number: DS32227 Rev. 6 - 2 9 of 14 www.diodes.com May 2012 © Diodes Incorporated PRELIMINAR

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