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RT4832AWSC 数据表(PDF) 7 Page - Richtek Technology Corporation

部件名 RT4832AWSC
功能描述  Sub PMIC with Dual-Output Boost Converter
PDF  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  RICHTEK [Richtek Technology Corporation]
网页  http://www.richtek.com
标志 RICHTEK - Richtek Technology Corporation

RT4832AWSC 数据表(HTML) 7 Page - Richtek Technology Corporation

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RT4832A
Copyright © 2017 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS4832A-00
January
2017
www.richtek.com
7
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Thermal Shutdown Hysteresis
TSDHYS
--
15
--
C
Flash LED
Accuracy of Flash Output
Current 1/2
AIFL1
IFLED > 375mA
4
--
4
%
AIFL2
IFLED = 25mA to 375mA
10
--
10
FLED Sense Voltage 1/2
VDSFL
FlashOUT
FlashLED,
IFLED = 750mA (per channel)
--
300
--
mv
Flash 1/2 Start-up Current
IFLST
FlashOUT = 3.6V, FlashLED to
Ground (per channel)
2
2.5
4
mA
Flash Pre-charge Current
IFLPRE
FlashOUT = VIN
 0.15V
40
150
300
mA
Flash Switching Frequency
fFOSC
0x07[7:6] = 01
1.8
2
2.2
MHz
Safety Timeout
tOUT
0x07[4:0] = 10000, Strb goes high until
0x0B[1] = 01
460
512
563
ms
Maximum Duty Cycle
DmaxFL
0x07[6] = 01
--
70
--
%
Flash N-MOSFET Ron
RonFLN
20
65
130
m
Flash P-MOSFET Ron
RonFLP
FlashOUT = 3.6V
20
80
160
m
Flash N-MOSFET Current Limit IOCPFL
0x07[5] = 1
2.24
2.8
3.36
A
VIN Monitor Voltage
VMON
VIN falls until 0x0B[4] = 01,
0x08[2:0] = 100, 0x09[0] = 1
2.82
2.9
2.98
V
VIN Monitor Hysteresis Voltage VMONhys
VIN rises until 0x0B[4] = 10,
0x08[2:0] = 100, 0x09[0] = 1
1
5
--
%
Flash Output Short Voltage
VFLSH
FlashOUT < 1.5V for 1msec, 0x0B[5] =
01
0
--
1.5
V
Flash LED 1/2 Short Voltage
VFLEDSH
FlashLED < 1.5V for 1msec, 0x0B[2] =
01 (per channel)
0
--
1.5
V
Flash Over Voltage Protection
VFLOVP
FlashOUT > VIN, 0x0B[6] = 01
5
5.3
5.6
V
Back Light LED
Accuracy of Back Light Output
Current 1/2
AIBL1
IBLED = 5mA to 25mA
3
--
3
%
AIBL2
IBLED = 0.5mA to 5mA
5
--
5
Matching of Output Current
MIBL
IBLED = 5mA to 25mA
3
--
3
%
BLED Sense Voltage 1/2
VDSBL
VIN = 3V, IFBx = 25mA
--
500
--
mV
Back Light Switching
Frequency
fblosc
0x03[7] = 1
0.9
1
1.1
MHz
Maximum Duty Cycle
DmaxBL
0x03[7] = 1
90
93
--
%
Back Light N-MOSFET Ron
RonBLN
100
270
400
m
Back Light Current Limit
IOCPBL
0.96
1.2
1.44
A
Back Light Over Voltage
Protection
VBLOVP
0x02[7:5] = 001
21
22
23
V
DSV
Accuracy of POS Voltage
VPOS
0x0E[5:0] = 010100, IOUT = 0mA
1
--
1
%
Accuracy of CPOUT
VCPOUT
0x0F[5:0] = 010100, IOUT = 0mA
1.5
--
1.5
%
Drop-Out Voltage
VDO
VLCMOUT = VPOS = 5.2V,
IOUT = 50mA
--
100
--
mV



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