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參數資料
型號： TPS65950ZXNT
廠商： TEXAS INSTRUMENTS INC
元件分類： 消費家電
英文描述： SPECIALTY CONSUMER CIRCUIT, PBGA209
封裝： 7 X 7 MM, 0.40 MM PITCH, PLASTIC, BGA-209
文件頁數： 27/167頁
文件大小： 2566K
代理商： TPS65950ZXNT
8.3.2
Precharge
TPS65950
Integrated Power Management/Audio Codec
SWCS032 – OCTOBER 2008
www.ti.com
Table 8-1. Main Charge Electrical Characteristics
VBAT = 3.6 V, RS = 0.22 , unless otherwise specified (continued)
Parameter
Test Conditions
Min(1)
Typ(2)
Max(3)
Unit
Current charge accuracy
Tested for ICHG = 600 mA
ICHG–0.0
ICHG
ICHG+0.0
A
4
Battery Rs
ESR (including FUSE)
0.4
0.5
During slow precharge and fast precharge, a precharge voltage loop is always enabled and limits the
battery voltage charge to 3.6 V typical. To use the constant voltage loop, a battery voltage prescaler is
also always enabled. The voltage loop is nonlinear. A fast comparator switches off the external power
portable media operating system (PMOS) when VBAT is higher than 3.6 V and switches on the PMOS
when VBAT is lower than 3.6 V. When the USB charger is used, fast precharge is not available (to comply
with USB standards).
In precharge mode, the threshold of the ac charger overvoltage detection is forced to 6.8 V.
Table 8-2 lists the precharge electrical characteristics.
Table 8-2. Precharge Electrical Characteristics
RS = 0.22 , unless otherwise specified
Parameter
Test Conditions
Min(1)
Typ(2)
Max(3)
Unit
ICTLAC1 output voltage swing
IICTLAC1 = –10 A, VBAT = 1.5 V, VCCS = VBAT+200 mV,
VAC–0.3
V
(precharge)
VAC = 5.4 V, SYSACTIV = 0
IICTLAC1 = 10 A, VBAT = 1.5 V, VCCS = VBAT,
0.35
VAC = 5.4 V, SYSACTIV = 0
ICTLUSB1 output voltage
IICTLUSB1 = –10 A, VBAT = 1.5 V, VCCS = VBAT+200 mV,
VAC–0.3
V
swing (precharge)
VAC = 0.0 V, VBUS = 5 V, SYSACTIV = 0
IICTLUSB1 = 10 A, VBAT = 1.5 V, VCCS = VBAT,
0.35
VAC = 0.0 V, VBUS = 5 V, SYSACTIV = 0
ICTLAC2 output voltage swing
IICTLAC2 = –10 A, VBAT = 1.5 V, VCCS = VBAT+200 mV,
VCCS–0.3
V
(precharge)
VAC = 5.4 V, SYSACTIV = 0
IICTLAC2 = 10 A, VBAT = 1.5 V, VCCS = VBAT,
0.35
VAC = 5.4 V, SYSACTIV = 0
ICTLUSB2 output voltage
IICTLUSB2 = –10 A, VBAT = 1.5 V, VCCS = VBAT+200 mV,
VCCS–0.3
V
swing (precharge)
VAC = 0.0 V, VBUS = 5 V, SYSACTIV = 0
IICTLUSB2 = 10 A, VBAT = 1.5 V, VCCS = VBAT,
0.35
VAC = 0.0 V, VBUS = 5 V, SYSACTIV = 0
Ac precharge battery removal
In fast precharge, Rlimit = 700 k
, VAC = 5.4 V,
150
s
switch-off time
VBAT threshold = 3.6 V, measure charge current from
removal to 10%
USB precharge battery removal In precharge, Rlimit = 500 k
, VBUS = 5.0 V,
150
s
switch-off time
VBAT threshold = 3.6 V, measure charge current from
removal to 10%
PCHGPOR voltage threshold
VAC = 5.4 V or VBUS = 5.0 V, PCHGPOR raise when
1.2
V
VPRECH voltage higher than the voltage threshold
PCHGCLK click frequency
VAC = 5.4 V or VBUS = 5.0 V (including temperature
18.5
32
45.4
kHz
variation)
VAC = 5.4 V or VBUS = 5.0 V (at room temperature)
24.3
32
39.68
PCHGVREF band gap voltage
VAC = 5.4 V or VBUS = 5.0 V
0.7125
0.75
0.7875
V
VPRECH regulator output
VAC = 5.4 V or VBUS = 5.0 V
1.4
1.5
1.6
V
Small precharge output current
VBAT = 0.0 V, VAC = 5.4 V or (VBUS = 5.0 V and
3
5
7
mA
USBSLOWPCHG = 1)
(1)
Min = Minimum value
(2)
Typ = Typical value
(3)
Max = Maximum value
Battery Interface
122
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