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RT8489 Datasheet(PDF) 6 Page - Richtek Technology Corporation

Part # RT8489
Description  High Voltage 4-CH LED Driver Controller
PDF  16 Pages
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Manufacturer  RICHTEK [Richtek Technology Corporation]
Direct Link  http://www.richtek.com
Logo RICHTEK - Richtek Technology Corporation

RT8489 Datasheet(HTML) 6 Page - Richtek Technology Corporation

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RT8489
6
DS8489-00 November 2012
www.richtek.com
©
Copyright 2012 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
LED Current On Threshold at ACTL VACTL_ON
--
1.4
--
V
DCTL Input Current
IDCTL
VDCTL ≤ 6V
--
--
1
μA
PWM Boost Converter
Switching Frequency
fSW
RSET = 40kΩ
220
280
340
kHz
Minimum Off-Time
RSET = 40kΩ
--
300
--
ns
VLED Threshold for No Connection VLED
--
0.1
--
V
Regulated VLED
VLED
Highest Voltage LED String
--
0.7
--
V
Amplifier Output Current
IVC
2.4V > VVC > 0.2V
--
±
30
--
μA
VC Threshold for PWM Switch Off
--
0.7
--
V
Switch Gate Driver
GBIAS Voltage
VGBIAS
IGBIAS = 20mA
--
10
--
V
IGATE = −20mA
--
7.7
--
GATE High Voltage
VGATE_H
IGATE = −0.1mA
--
8.2
--
V
IGATE = 20mA
--
0.7
--
GATE Low Voltage
VGATE_L
IGATE = 0.1mA
--
0.4
--
V
GATE Drive Rise and Fall Time
1nF load at Gate
--
20
--
ns
LED Current Sources Gate Driver
IGATEx = −2mA
--
8.1
--
GATE1 to 4 High Voltage
VGATEx_H
IGATEx = −0.1mA
--
8.3
--
V
IGATEx = 2mA
--
0.8
--
GATE1 to 4 Low Voltage
VGATEx_L
IGATEx = 0.1mA
--
0.6
--
V
OVP and Soft-Start
OVP Threshold
VOVP
--
1.23
--
V
OVP Input Current
IOVP
VOVP ≤ 1.23V
--
1
--
μA
Soft-Start Pin Current
ISS
VSS ≤ 3.2V
--
8
--
μA
Thermal Protection
Thermal Shutdown temperature
TSD
--
150
--
°C
Thermal Shutdown Hysteresis
ΔTSD
--
20
--
°C
Note 1.
Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. 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 may
affect device reliability.
Note 2.
θJA is measured at TA = 25°C on a high effective thermal conductivity four-layer test board per JEDEC 51-7.
Note 3.
Devices are ESD sensitive. Handling precaution is recommended.
Note 4.
The device is not guaranteed to function outside its operating conditions.



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