參數(shù)資料
型號： TPS65166RHAR
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PQCC40
封裝： 6 X 6 MM, GREEN, PLASTIC, M0-220VJJD-2, QFN-40
文件頁數(shù)： 20/45頁
文件大小： 3690K
代理商： TPS65166RHAR
NTC
B
2T
R18 = R
(T)
B + 2T
-
(28)
NTC
NTC||R18
NTC
R18
R
(T)
R
=
R18 + R
(T)
(29)
0kW
50kW
100kW
150kW
200kW
250kW
-20C
0C
20C
40C
60C
80C
0kW
5kW
10kW
15kW
20kW
25kW
30kW
-20C
0C
20C
40C
60C
80C
TS
logic
NTC||R18
R19
V
= V
= 3.3 V
R
+ R19
R
+ R19
(30)
OFFE
TS
logic
TS
R21
V
= 2V
(V
2V
)
= 2V
(3.3V 2V
)
R20
-
-
(31)
www.ti.com.......................................................................................................................................................................................... SLVS976 – SEPTEMBER 2009
The NTC termistor manufacturer provides the above parameters. Typically a 22k
NTC is used. Table 9
provides a suggestion for NTCs.
Table 9. Negative Termistor Selection
RESISTANCE (25°C)
B CONSTANT
COMPONENT SUPPLIER
COMMENT
22k
3950 K
Murata, NCP18XW223E
±3%
22k
3800 K
Vishay, NTCS0805E3223FHT
±1%
22k
4554 K
TDK, NTCG164LH223HT
±3%
To linearize the resistance-temperature characteristic of the NTC termistor, a parallel resistor R18 is added. T is
the temperature at which the NTC characteristic curve is linearized. Typically T is located in the middle of the set
temperature range at which the VOFFE voltage should be adjusted. For example, if the temperature compensation
should start at 0°C and stop at 25°C T = 12.5°C + 273.15 K/°C = 285.65 K.
The resulting overall resistance RNTC||R18 can be calculated as follows.
Figure 29. Resistance-Temperature Characteristics NTC (22 k
) and Linearized NTC Network at 12.5°C
To achieve different slopes, different R18 values are required. To obtain the most linear slope, the calculated
value has to be used. To achieve steeper slopes, higher values for R18 are necessary, smaller values produce
shallower slopes. By adjusting the resistor R19, the start and end point of the compensation can be set. The
voltage VTS of the resistor network at TS is calculated by the following equation:
Finally, the resulting output voltage, VOFFE, during the compensation period can be calculated as follows:
Figure 30 shows examples for VOFFE_min = –22V and VOFFE_max = –11V with different slopes and starting points of
the temperature compensation. For further compensation characteristics, refer to the available TPS65166
support excel sheet.
Copyright 2009, Texas Instruments Incorporated
27
Product Folder Link(s): TPS65166
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相關代理商/技術參數(shù)
參數(shù)描述
TPS65167ARHAR 功能描述:其他電源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167ARHARG4 功能描述:其他電源管理 Compact LCD Bias Sply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167EVM-277 功能描述:電源管理IC開發(fā)工具 TPS65167 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
TPS65167RHAR 功能描述:其他電源管理 Compact LCD Bias Supply RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel
TPS65167RHARG4 功能描述:LCD 驅(qū)動器 12V/3.5A(I/O) 4-CH Multi-Converter RoHS:否 制造商:Maxim Integrated 數(shù)位數(shù)量:4.5 片段數(shù)量:30 最大時鐘頻率:19 KHz 工作電源電壓:3 V to 3.6 V 最大工作溫度:+ 85 C 最小工作溫度:- 20 C 封裝 / 箱體:PDIP-40 封裝:Tube
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