rt8450 Richtek Technology Corporation, rt8450 Datasheet - Page 5

• Manufacturer Part Number: rt8450
• Description: High Voltage Multi-topology Led Driver
• Manufacturer: Richtek Technology Corporation

2. RT8450_D3-12_V3 : Buck Converter Application
Schematic
Bill of Materials
ER-RT8450-0308-A
April 2008
TP7
VC
VIN
EN1
U1
C1,C4,C5
C2,C3
R5
10K
C6
3.3nF
Reference Qty.
TP5
ISN
TP8
ACTL
R9
100K
R8
10K
1
C7
0.47uF
TP4
EN
0
R6
EN1
1
3
2
R10
GP7
DCTL
TP6
ISP
100k
RT8450
C3216X7R1H105K
GRM32ER71H475KA88 4.7uF/50V/X7R
1
R7
0
Part Number
R1
10K
ACTL1
ISP1
ISN1
VC1
DCTL
EN1
ACTL1
1
2
3
4
5
6
ISP
ISN
VC
ACTL
DCTL
EN
VIN
RT8450
RichTek Conceptual
GND
1uF/50V/X7R
High Voltage
Multi-Topology LED Driver
DC_IN
VCC2
VCC1
GND
OVP
SW
SS
1
2
3
12
11
10
9
8
7
Description
SW1
J1
1
R3
0
1uF/50V
VCC1
SS1
OVP1
C4
2
10nF
C8
1uF/50V
R4
0
C5
RT8450
Evaluation Board
TP9
SW
SCHOTTKY/PJ29 SR26
R2
300mohm
D1
WDFN-12L 3x3
Package
1206
1210
C2
4.7uF/50V
L1
10u
C1
1
C3
4.7uF/50V
Manufacture
1
www.richtek.com
2
RICHTEK
1uF/50V
Murata
GP3
VIN
TDK
LED1+
LED1-
1
1
GP1
LED1+
GP2
LED1-