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RT8577 Datasheet(PDF) 5 Page - Richtek Technology Corporation

Part # RT8577
Description  High Voltage 4-CH LED Driver
Download  12 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8577 Datasheet(HTML) 5 Page - Richtek Technology Corporation

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5
DS8577-00 November 2011
www.richtek.com
RT8577
Electrical Characteristics
(VCC = 12V, TA = 25
°C, unless otherwise specified)
Absolute Maximum Ratings
(Note 1)
Supply Voltage, VCC, STATUS ------------------------------------------------------------------------------------------ 33V
LED1 to LED4 --------------------------------------------------------------------------------------------------------------- 50V
PWM, EN, DRV, SEN, SS, VC, RT, CREG, OVP/UVP, RISET ------------------------------------------------- 5.5V
Power Dissipation, PD @ TA = 25
°C
WQFN-20L 5x5 ------------------------------------------------------------------------------------------------------------- 2.778W
Package Thermal Resistance (Note 2)
WQFN-20L 5x5,
θJA -------------------------------------------------------------------------------------------------------- 36°C/W
WQFN-20L 5x5,
θJC ------------------------------------------------------------------------------------------------------- 6°C/W
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
Recommended Operating Conditions
(Note 4)
Supply Voltage, VCC ------------------------------------------------------------------------------------------------------- 9V to 28V
LED1 to LED4 --------------------------------------------------------------------------------------------------------------- 45V
ILED1 to ILED4 ----------------------------------------------------------------------------------------------------------------- 10mA to 200mA
Junction Temperature Range ---------------------------------------------------------------------------------------------
−40°C to 125°C
Ambient Temperature Range ---------------------------------------------------------------------------------------------
−40°C to 85°C
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Supply Voltage
Supply Current
IVCC
Switching Off
--
5
--
mA
Shutdown Current
ISHDN
VEN < 0.7V
--
--
10
μA
VDD LDO Output
VCREG
--
5
--
V
VDD LDO Capability
ICREG
30
--
--
mA
VCC Rising
--
6.7
8
VCC UVLO Threshold
VUVLO
Hysteresis
--
1.4
--
V
Logic-High
VENH
1.5
--
--
EN Threshold
Voltage
Logic-Low
VENL
--
--
0.8
V
LED Current Programming
LED Current Accuracy
RISET = 9.1kΩ, VPWM > 1.2V
114
120
126
mA
LED Current Matching
RISET = 9.1kΩ, VPWM > 1.2V
LEDx
LED_AVE
LED_AVE
II
100%
I
−
×
--
±1.5
±3
%
LED1 to LED4 Regulation Voltage
ILED = 200mA
--
0.6
--
V
VLED Threshold
No Connection
--
0.1
--
V
RISET Pin Voltage
--
1.2
--
V
To be continued


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