RT8453BGSP Richtek USA Inc, RT8453BGSP Datasheet - Page 4

• Manufacturer Part Number: RT8453BGSP
• Description: IC LED DVR BUCK 40V 1.5A 8SOP
• Manufacturer: Richtek USA Inc

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

RT8453B
Absolute Maximum Ratings
Recommended Operating Conditions
Electrical Characteristics
(V
www.richtek.com
Overall
Supply Current
Shutdown Current
EN Input Threshold
Voltage
Current Sense Amplifier
Sense Threshold Voltage (V
V
ISN Pin Input Current
VC Pin Output Current
VC Threshold for PWM Switch Off
LED Dimming
Analog Dimming ACTL Pin Input
Current
LED Current Off Threshold at
ACTL
PWM BOOST Converter
Switching Frequency
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------------- 1.333W
SOP-8 (Exposed Pad), θ
Supply Input Voltage, V
SW Pin Voltage at Switching Off, ISN -------------------------------------------------------------------------------- 45V
ACTL ------------------------------------------------------------------------------------------------------------------------- 8V (Note 6)
EN ----------------------------------------------------------------------------------------------------------------------------- 20V
Power Dissipation, P
Package Thermal Resistance (Note 2)
SOP-8 (Exposed Pad), θ
Junction Temperature ----------------------------------------------------------------------------------------------------- 150°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Mode) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Mode) ------------------------------------------------------------------------------------------------------ 200V
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 4.5V to 40V
Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
CC
ISN
= 12V, No Load, T
)
Parameter
A
Logic-High
Logic-Low
D
= 25°C, unless otherwise specified)
@ T
CC
JA
JC
----------------------------------------------------------------------------------------------- 45V
A
--------------------------------------------------------------------------------------------- 75°C/W
--------------------------------------------------------------------------------------------- 15°C/W
= 25°C
CC
−
I
I
V
V
I
I
I
V
Symbol
f
VCC
SHDN
ISN
VC
ACTL
SW
EN_H
EN_L
ACTL
(Note 1)
VC ≤ 0.4V (Switching off)
V
4.5V ≤ common mode ≤ 40V
V
2.4V > VC > 0.2V
0.3V ≤ V
EN
ISN
≤ 0.7V
= 24V
ACTL
Test Conditions
(Note 4)
≤ 1.2V
Min
170
400
1.5
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DS8453B-00 August 2010
Typ
250
190
±20
500
0.7
0.2
40
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4
To be continued
Max
600
210
0.5
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6
3
Unit
kHz
mV
mA
μA
μA
μA
μA
V
V
V