參數(shù)資料
型號(hào)： TPS60122PWPRG4
廠商： Texas Instruments, Inc.
英文描述： REGULATED 3.3 V, 200-mA HIGH EFFICIENCY CHARGE PUMP DC/DC CONVERTERS
中文描述： 穩(wěn)壓3.3伏，200毫安高效率電荷泵DC / DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 6/27頁(yè)
文件大?。?/td> 561K
代理商： TPS60122PWPRG4
TPS60120, TPS60121, TPS60122, TPS60123, TPS60124, TPS60125
REGULATED 200-mA HIGH EFFICIENCY CHARGE PUMP
DC/DC CONVERTERS
SLVS257B – NOVEMBER 1999 – REVISED AUGUST 2000
6
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
low-battery detector (TPS60120, TPS60122, TPS60124)
The internal low-battery comparator trips at 1.21 V
±
5% when the voltage on LBI ramps down. The battery
voltage at which the comparator initiates a low battery warning at the LBO output can easily be programmed
with a resistive divider as shown in Figure 1. The sum of resistors R1 and R2 is recommended to be in the 100-k
to 1-M
range.
LBO is an open drain output. An external pullup resistor to OUT, in the 100-k
to 1-M
range, is recommended.
During start-up, the LBO output signal is invalid for the first 500
μ
s. LBO is high impedance when the device
is disabled.
If the low-battery comparator function is not used, connect LBI to ground and leave LBO unconnected.
V
(TRIP)
1.21 V
1
R1
R2
_
+
+
–
VREF
VBAT
IN
R1
LBI
R2
LBO
R3
VO
Figure 1. Programming of the Low-Battery Comparator Trip Voltage
Formulas to calculate the resistive divider for low battery detection, with V
LBI
= 1.15 V – 1.27 V:
VLBI
VBat
R1
1 M
R2
R2
1 M
Formulas to calculate the minimum and maximum battery voltage that triggers the low battery detector:
VBat(min)
VLBI(min)
R1(min)
R2(max)
R2(max)
VBat(max)
VLBI(max)
R1(max)
R2(min)
R2(min)
Table 1. Recommended Values for the Resistive Divider From the E96 Series (
±
1%),
V
LBI
= 1.15 V – 1.27 V
VBAT/V
1.8
R1/k
357
R2/k
732
VBAT (MIN)/V
1.700
VBAT(MAX)/V
1.902
–5.66%
5.67%
1.9
365
634
1.799
–5.32%
2.016
6.11%
2.0
412
634
1.883
–5.86%
2.112
5.6%
2.1
432
590
1.975
–5.95%
2.219
5.67%
2.2
442
536
2.080
–5.45%
2.338
6.27%
Using
±
1% accurate resistors, the total accuracy of the trip voltage is about
±
6%, considering the
±
4% accuracy
the integrated voltage reference adds and considering that not every calculated resistor value is available.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
TPS60123 制造商:TI 制造商全稱:Texas Instruments 功能描述:REGULATED 200-mA HIGH EFFICIENCY CHARGE PUMP DC/DC CONVERTERS
TPS60123PWP 功能描述:電荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60123PWPG4 功能描述:電荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60123PWPR 功能描述:電荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
TPS60123PWPRG4 功能描述:電荷泵 Reg 3.3V Hi-Eff Chrg Pump DC/DC Converter RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube
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