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參數(shù)資料
型號(hào): TPS65171RHAR
廠商: TEXAS INSTRUMENTS INC
元件分類: 穩(wěn)壓器
英文描述: 4 A SWITCHED CAPACITOR REGULATOR, 900 kHz SWITCHING FREQ-MAX, PQCC40
封裝: 6 X 6 MM, GREEN, PLASTIC, MO-220VJJD-2, VQFN-40
文件頁(yè)數(shù): 21/46頁(yè)
文件大小: 3644K
代理商: TPS65171RHAR
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
OFFE
TS
logic
TS
R21
V
= 2V
(V
2V
)
= 2V
(3.3V 2V
)
R20
-
-
SLVSA22A – OCTOBER 2009 – REVISED JANUARY 2010
www.ti.com
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:
(30)
Finally, the resulting output voltage, VOFFE, during the compensation period can be calculated as follows:
(31)
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 TPS65171
support excel sheet.
28
Copyright 2009–2010, Texas Instruments Incorporated
Product Folder Link(s): TPS65171
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