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RT8474A датащи(PDF) 6 Page - Richtek Technology Corporation

номер детали RT8474A
подробное описание детали  High Voltage Multiple-Topology LED Driver
PDF  13 Pages
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производитель  RICHTEK [Richtek Technology Corporation]
домашняя страница  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8474A датащи(HTML) 6 Page - Richtek Technology Corporation

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RT8474A
6
DS8474A-05 April 2015
www.richtek.com
©
Copyright
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Typical Application Circuit
Boost Configuration
Buck Configuration
RT8474A
ISN
VCC
VIN
1
CREG
VC
R1
10k
5
8
GND
SW
ISP
Analog Dimming
or PWM Dimming
CTL
6
2
7
3
9 (Exposed Pad)
RSENSE
C2
C3
C1
3.3nF
1µF
L1
D1
4.5V to 50V
100mV
R2
5.1M
C5
1µF
R5
10
R4
(Short
Option)
R5 (Short Option)
Note : VIN, VSW, VISP, VISN < 50V
OVP 4
R3
R4
C4
RT8474A
ISN
VCC
VIN
1
CREG
VC
R3
10k
5
8
GND
SW
ISP
Analog Dimming
or PWM Dimming
CTL
6
2
7
3
9 (Exposed Pad)
C5
C2
C1
3.3nF
1µF
D1
C3
1µF
R2
10
10µF
L1
22µH
C4
1µF
R1
0.1
51R
VZ > VLED
Note :
1. VIN, VSW, VISP, VISN < 50V
2. VLED : the voltage across the LED string
3. Vz : Zener diode breakdown voltage
20R
VZ
VLED
50V (MAX)
OVP 4



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