Diodes AP8802H Bedienungsanleitung PDF herunterladen (Seite 2)

AP8802H

60V 1A LED STEP-DOWN CONVERTER

AP8802H

Document number: DS32227 Rev. 6 - 2

2 of 14

www.diodes.com

May 2012

PRELIMINARY

NEW PRODUCT

Pin Descriptions

Pin Name Function

SW Switch Pin. Connect inductor/freewheeling diode here, minimizing track length at this pin to reduce EMI.

GND GND pin

SET Set Nominal Output Current Pin. Configure the output current of the device.

CTRL

Dual function dimming control pin with an input impedance approximately 50kΩ.

• Input voltage of 0.2V or lower forces the device into low current standby mode and shuts off the output.

• A PWM signal (driven by an open-drain/collector source) allows the output current to be adjusted over a wide

range up to 100%.

• An analog voltage between 0.3V and 2.5V adjusts the output current between 24% and 200% of the current

set by 0.2V/R

If the CTRL pin is left open then its voltage will default to V

REF

Input Supply Pin. Must be locally bypassed.

EP Exposed pad: Internally connected to IC substrate. It should be connected to GND and as large as possible thermal

mass for improved thermal impedance and power dissipation capability. See Land Pad diagrams.

NC No connection

Functional Block Diagram

Figure. 1 Functional Block Diagram

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Diodes AP8802H Bedienungsanleitung Seite 2