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AP8802H
60V 1A LED STEP-DOWN CONVERTER
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
Pin Assignments
(Top View)
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
SET 1
GND 2
8 CTRL
7 GND
eliminating the need for ballast resistors. The AP8802H switches at
frequency up to 700kHz. This allows the use of small size external
NC 3
AP8802H
6 SW
components, hence minimizing the PCB area needed.
V IN
4
5 SW
Maximum output current of AP8802H is set via an external resistor
connected between the V IN and SET input pins.
Dimming is
SO-8EP
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.
Applications
Features
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Commercial & industrial lighting
Small LCD panel backlight
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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)
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Appliances interior lighting
Architecture Detail lighting
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
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
R SET
48V
V IN
SET
0.33 Ω
CTRL
AP8802H
D1
PDS3200
L1
C1
2.2μF
GND
SW
68μF
AP8802H
Document number: DS32227 Rev. 6 - 2
1 of 14
www.diodes.com
May 2012
? Diodes Incorporated
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相关代理商/技术参数
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