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RT8474A Datasheet(PDF) 4 Page - Richtek Technology Corporation

Part No. RT8474A
Description  High Voltage Multiple-Topology LED Driver
Download  13 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8474A Datasheet(HTML) 4 Page - Richtek Technology Corporation

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RT8474A
4
DS8474A-05 April 2015
www.richtek.com
©
Copyright
2015 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Electrical Characteristics
Recommended Operating Conditions
(Note 5)
Supply Input Voltage ------------------------------------------------------------------------------------------------------ 4.5V to 50V
Junction Temperature Range --------------------------------------------------------------------------------------------
−40°C to 125°C
Ambient Temperature Range --------------------------------------------------------------------------------------------
−40°C to 85°C
(VCC = 5V, CIN = 1
μF, TA = 25°C, unless otherwise specified)
Absolute Maximum Ratings
(Note 1)
Supply Input Voltage, VCC ----------------------------------------------------------------------------------------------
−0.3V to 60V
SW Pin Voltage at Switching off, ISP, ISN, OVP ------------------------------------------------------------------
−0.3V to 60V
CREG Voltage --------------------------------------------------------------------------------------------------------------
−0.3V to 6V
CTL Voltage (Note 2) ----------------------------------------------------------------------------------------------------
−0.3V to 20V
Power Dissipation, PD @ TA = 25
°C
SOP-8 (Exposed Pad) --------------------------------------------------------------------------------------------------- 3.44W
Package Thermal Resistance (Note 3)
SOP-8 (Exposed Pad),
θJA ---------------------------------------------------------------------------------------------- 29°C/W
SOP-8 (Exposed Pad),
θJC --------------------------------------------------------------------------------------------- 2°C/W
Junction Temperature ----------------------------------------------------------------------------------------------------- 150
°C
Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260
°C
Storage Temperature Range --------------------------------------------------------------------------------------------
−65°C to 150°C
ESD Susceptibility (Note 4)
HBM (Human Body Model) ---------------------------------------------------------------------------------------------- 2kV
MM (Machine Model) ----------------------------------------------------------------------------------------------------- 200V
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Overall
Regulator Output Voltage
VCREG
ICREG = 20mA
4.5
5
5.5
V
Supply Current
IVCC
VC
 0.4V
--
--
3
mA
VIN Rising
--
4.2
4.5
VIN Under-Voltage Lockout
Threshold
VUVLO
VIN Falling
3.9
4.1
--
V
Current Sense Amplifier
Input Threshold (VISP VISN)
VCTL  1.25V
97
100
103
mV
Input Current
IISP
VISP = 24V
--
200
--
A
Input Current
IISN
VISN = 24V
--
20
--
A
Output Current
IVC
2.4V > VC > 0.3V
--
±10
--
A
VC Threshold for CTL Switch Off
--
0.4
--
V
LED Dimming
Input Current of CTL Pin
ICTL
0.2V
 VCTL  1.2V
--
1
2
A
LED Current Off Threshold at
CTL
VCTL_OFF
0.15
0.2
0.25
V
LED Current On Threshold at
CTL
VCTL_ON
--
1.2
1.5
V


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