參數(shù)資料
型號： SI3211PPTX-EVB
廠商： Silicon Laboratories Inc
文件頁數(shù)： 82/148頁
文件大?。?/td> 0K
描述： BOARD EVAL W/DISCRETE INTERFACE
標準包裝： 1
系列： ProSLIC®
主要目的： 接口，模擬前端（AFE）
已用 IC / 零件： Si3211
已供物品： 板，CD
Si3210/Si3211
Rev. 1.61
39
Not
Recommended
fo
r N
ew
D
esi
gn
s
The power dissipation on the NPN bipolar transistor
driving the RING terminal can become large and may
require a higher power rating device. The non-tracking
mode of operation is required by specific terminal
equipment that, in order to initiate certain data
transmission modes, goes briefly on-hook to measure
the line voltage to determine whether there is any other
off-hook terminal equipment on the same line.
TRACK = 0 mode is desired since the regulator output
voltage has long settling time constants (on the order of
tens of milliseconds) and cannot change rapidly for
TRACK = 1 mode. Therefore, the brief on-hook voltage
measurement would yield approximately the same
voltage as the off-hook line voltage and cause the
terminal equipment to incorrectly sense another off-
hook terminal.
Figure 19. VTIP, VRING, and VBAT in the Forward Active State
Constant I Region
Constant V Region
V
OC
I
LIM
V
CM
V
OC
V
OV
V
OV
V
RING
V
BAT
V
BATL
R
LOOP
V
TIP
TR
AC
K=
1
TRACK=0
|V
TIP - VRING|
Table 28. Associated Relevant DC-DC Converter Registers
Parameter
Range
Resolution
Register Bit
Location
DC-DC Converter Power-off
Control
N/A
DCOF
Direct Register 14
DC-DC Converter Calibration
Enable/Status
N/A
DCCAL
Direct Register 93
DC-DC Converter PWM Period
0 to 15.564 s
61.035 ns
DCN[7:0]
Direct Register 92
DC-DC Converter Min. Off Time
(0 to 1.892 s) + 4 ns
61.035 ns
DCTOF[4:0]
Direct Register 93
High Battery Voltage—VBATH
0 to –94.5 V
1.5 V
VBATH[5:0]
Direct Register 74
Low Battery Voltage—VBATL
0 to –94.5 V
1.5 V
VBATL[5:0]
Direct Register 75
VOV
0 to –9 V or
0 to –13.5 V
1.5 V
VMIND[3:0]
VOV
Indirect Register 41
Direct Register 66
Note: The ProSLIC uses registers that are both directly and indirectly mapped. A “direct” register is one that is mapped
directly. An “indirect” register is one that is accessed using the indirect access registers (direct registers 28 through
31).
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