RT8450BGCP Richtek USA Inc, RT8450BGCP Datasheet - Page 2

• Manufacturer Part Number: RT8450BGCP
• Description: IC LED DRIVER PWM 16TSSOP
• Manufacturer: Richtek USA Inc

Specifications of RT8450BGCP

• Internal Driver: Yes
• Type - Primary: Backlight
• Mounting Type: Surface Mount
• Topology: PWM, Step-Down (Buck), Step-Up (Boost)
• Number Of Outputs: 1
• Frequency: 400kHz ~ 600kHz
• Voltage - Supply: 4.5 V ~ 40 V
• Package / Case: 16-TSSOP (0.173", 4.40mm Width) Exposed pad
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: 1028-1003-2

RT8450/B
Typical Application Circuit
www.richtek.com
2
PWM
Dimming control
4.5V to 40V
4.5V to 40V
Dimming
Analog
4.5V to 40V
10k
R1
C2
3nF
V
V
Figure 3. PWM Dimming Buck Configuration Through ACTL Pin
5V
5V
PWM
Dimming control
IN
5V
IN
10k
R1
10k
C2
3nF
R1
C2
3nF
Figure 1. PWM to Analog Dimming Buck Configuration
V
IN
10nF
C3
Figure 2. Analog Dimming Buck Configuration
C3
10nF
C3
10nF
C1
0.5µF
C1
C4
C1
VCCx
ACTL
DCTL
EN
VC
SS
VCCx
EN
DCTL
VC
SS
ACTL
VCCx
ACTL
DCTL
EN
VC
SS
RT8450/B
RT8450/B
RT8450/B
GND
GND
OVP
GND
OVP
OVP
ISP
ISN
SW
ISN
ISP
SW
ISN
ISP
SW
190mV
20µH
R2
190mV
190mV
L
R2
R2
20µH
20µH
L
L
R3
R3
R3
R4
DS8450/B-02 November 2009
R4
R4
C4
C4
C5