RT8450BGCP Richtek USA Inc, RT8450BGCP Datasheet - Page 6

• 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
Note 1. Stresses beyond those listed under
Note 2. Devices are ESD sensitive. Handling precaution is recommended.
Note 3. The device is not guaranteed to function outside its operating conditions.
Note 4. θ
Note 5. When the natural maximum duty cycle of the switching frequency is reached, the switching cycle will be skipped (not
Note 6. If connected with a 20kΩ serial resistor, ACTL and DCTL can go up to 40V.
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6
LED Dimming
Analog Dimming ACTL Pin
Input Current
LED Current Off Threshold at
ACTL
DCTL Input Current
PWM BOOST Converter
Switching Frequency
Maximum Duty Cycle (Note 5) D
Minimum on Time
SW On-Voltage
SW Current Limit
OVP and Soft Start
OVP T hreshold
OVP Input Current
Soft Start SS Pin Current
These are stress ratings only, and functional operation of the device at these or any other conditions beyond those
indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
JEDEC 51-7 thermal measurement standard.
reset) as the operating condition requires to effectively stretch and achieve higher on cycle than the natural maximum
duty cycle set by the switching frequency.
JA
Parameter
is measured in the natural convection at T
I
V
I
f
V
I
V
I
I
ACTL
DCTL
SW
LIM SW
OVP
SS
Symbol
ACTL
SW
OVP
MAX
“
Absolute Maximum Ratings
0.3V ≤ V
0.3V ≤ V
RT8450
RT8450B
RT8450
RT8450B
I
0.7V ≤ V
V
SW
SS
A
= 0.5A
≤ 2V
= 25°C on a high effective four layers thermal conductivity test board of
ACTL
DCTL
OV P
Conditions
≤ 1.5V
≤ 1.2V
≤ 6V
”
may cause permanent damage to the device.
1.25
Min
600
400
--
--
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DS8450/B-02 November 2009
Typ
800
500
250
0.2
0.4
1.5
1.2
80
86
--
--
--
6
1000
Max
600
0.5
0.5
--
--
--
--
--
--
--
--
3
Unit
kHz
kHz
μA
μA
μA
μA
%
ns
V
V
A
V