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RT8511B Datasheet(PDF) 4 Page - Richtek Technology Corporation

Part # RT8511B
Description  43V Asynchronous Boost WLED Driver
Download  11 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8511B Datasheet(HTML) 4 Page - Richtek Technology Corporation

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RT8511B
4
DS8511B-05
February 2015
www.richtek.com
©
Copyright
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
VIN Quiescent Current
IQ
VFB = 1.5V, No Switching
--
725
--
A
IQ_SW
VFB = 0V, Switching
--
--
2.2
mA
VIN Shutdown Current
ISHDN
VIN = 4.5V, VEN = 0V
--
1
4
A
Control Input
EN, PWM
Threshold Voltage
Logic-High
VIH
VIN = 2.7V to 24V
1.6
--
--
V
Logic-Low
VIL
VIN = 2.7V to 24V
--
--
0.8
EN Sink Current
IIH
VEN = 3V
1
--
10
A
Shutdown Delay
tSHDN
EN high to low
52
64
80
ms
PWM Dimming Frequency
0.1
--
8
kHz
Boost Converter
Switching Frequency
fOSC
VIN = 2.7V to 24V
0.4
0.5
0.6
MHz
LX On Resistance
(N-MOSFET)
RDS(ON)
VIN > 5V
--
0.4
0.6
Minimum ON Time
--
60
--
ns
Maximum Duty Cycle
DMAX
VFB = 0V, Switching
--
92
--
%
(VIN = 4.5V, TA = 25
°C, unless otherwise specified)
Electrical Characteristics
Recommended Operating Conditions
(Note 4)
Supply Input Voltage, VIN ------------------------------------------------------------------------------------------------ 2.7V to 24V
Junction Temperature Range --------------------------------------------------------------------------------------------
−40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−40°C to 85°C
Absolute Maximum Ratings
(Note 1)
VIN, EN, PWM, DIMC to GND ------------------------------------------------------------------------------------------
−0.3V to 26.5V
FB, OVP to GND ----------------------------------------------------------------------------------------------------------
−0.3V to 48V
LX to GND ------------------------------------------------------------------------------------------------------------------
−0.3V to 48V
< 500ns ----------------------------------------------------------------------------------------------------------------------
−1V to 48V
Power Dissipation, PD @ TA = 25
°C
WDFN-8L 2x2 -------------------------------------------------------------------------------------------------------------- 0.833W
Package Thermal Resistance (Note 2)
WDFN-8L 2x2,
θJA --------------------------------------------------------------------------------------------------------- 120°C/W
WDFN-8L 2x2,
θJC--------------------------------------------------------------------------------------------------------- 8.2°C/W
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260
°C
Junction Temperature ----------------------------------------------------------------------------------------------------- 150
°C
Storage Temperature Range --------------------------------------------------------------------------------------------
–65°C to 150°C
ESD Susceptibility (Note 3)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V


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