RT8453BGSP Richtek USA Inc, RT8453BGSP Datasheet - Page 2
RT8453BGSP
Manufacturer Part Number
RT8453BGSP
Description
IC LED DVR BUCK 40V 1.5A 8SOP
Manufacturer
Richtek USA Inc
Datasheet
1.RT8453BGSP.pdf
(11 pages)
Specifications of RT8453BGSP
Constant Current
Yes
Internal Driver
Yes
Type - Primary
Backlight, General Purpose
Mounting Type
Surface Mount
Topology
PWM, Step-Down (Buck)
Number Of Outputs
1
Frequency
400kHz ~ 600kHz
Voltage - Supply
4.5 V ~ 40 V
Package / Case
8-SOIC (0.154", 3.90mm Width) Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Output
-
Operating Temperature
-
Other names
1028-1004-2
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
RT8453BGSP
Manufacturer:
RCT
Quantity:
297 500
Part Number:
RT8453BGSP
Manufacturer:
RICHTEK/立锜
Quantity:
20 000
RT8453B
Typical Application Circuit
www.richtek.com
Functional Pin Description
9 (Exposed Pad)
Pin No.
6,
1
2
3
4
5
7
8
4.5V to 40V
ISN
VC
ACTL
EN
SS
GND
SW
VCC
Dimming
PWM
Dimming Control
Pin Name
Analog
or
V
5V
IN
10k
R5
C6
3.3nF
10
Current Sense Amplifier Negative Input. Voltage threshold between V
is 190mV.
PWM Converter Loop Compensation Node.
Analog Dimming Control. Effective programming range is between 0.3V and 1.2V.
Chip Enable (Active High). When low, chip is in shutdown mode.
Soft Start. A capacitor of at least 10nF is required for soft start.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
PWM Converter Switch Node.
Power Supply of the Chip. For good bypass, a low ESR capacitor is required.
C3
10nF
C2
8
3
4
2
5
VCC
ACTL
EN
VC
SS
RT8453B
GND
ISN
SW
1
7
6, 9 (Exposed Pad)
Pin Function
190mV
R2
22µH
L1
R3
R4
DS8453B-00 August 2010
C1
D1
CC
and ISN