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RT4832AWSC 数据表(PDF) 21 Page - Richtek Technology Corporation

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

RT4832AWSC 数据表(HTML) 21 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
21
Timeout and the Flash time out flag is set.
VIN Monitor
In Flash mode, to avoid the flash current to let VIN drop
to UVLO, RT4832A provides VIN monitor function for
the battery voltage detecting. If the battery voltage less
than the VIN monitor value, FLED will be into Torch
mode and output the torch current. This function can be
enable via set register 0x09[0] = 1 and 0x08[2:0] is the
Vin monitor value. The Register 0x0B [4] has the fault
flag set when the input voltage crosses the VIN value.
0x08[2:0]
FLED VIN Monitor Level
000
2.5V
001
2.6V
010
2.7V
011
2.8V
100
2.9V (default)
101
3V
110
3.1V
111
3.2V
Torch Mode
In Torch Mode, FLED provides 15 different current
levels from 25mA to 375mA in step of 25mA. Torch
current is activated by setting register 0x06 [7:4]. Once
Torch Mode is enabled, the current sources will ramp
up to the programmed torch current level by stepping.
The torch mode can be set via the register 0x0A[1] = 1
and 0x0A[2] = 0.
Table 6. FLED Operation Control Table
Flash
Enable
0x0A[1]
Strobe
Enable
0x09[4]
STRB
pin
Torch/
Flash
0x0A[2]
Status
0
X
X
X
Standby
1
1
0
X
Standby
1
1
1
0
Torch
mode
1
1
Rising
edge
1
Flash
mode
1
0
X
0
Torch
mode
1
Falling
edge
X
1
Flash
mode
Txmask
The TXmask pin is designed to clamp the flash LED to
torch current or no current that depend on the register
setting when the PA transmit. This function can be
enable by set the reg 0x09[2] = 1 and the reg 0x09[3] is
used to define this pin active high or low.



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