- 您現在的位置：買賣IC網 > PDF目錄98281 > TPS40197RGYR (TEXAS INSTRUMENTS INC) SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQCC16 PDF資料下載
參數資料
| 型號： | TPS40197RGYR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | SWITCHING CONTROLLER, 520 kHz SWITCHING FREQ-MAX, PQCC16 |
| 封裝： | PLASTIC, MO-241BB, VQFN-16 |
| 文件頁數： | 6/30頁 |
| 文件大小： | 931K |
| 代理商： | TPS40197RGYR |
第1頁第2頁第3頁第4頁第5頁當前第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁
(
)
t
R1 C1
0.4 V
e
10 A
R1
-
÷
è
m
÷
è
UDG-08098
5
6
FB
COMP
R1
C1
C2
R
COMP
TPS40197
V
OUT
ILIM(max)
SCP(max)
DS(on)min
V
I
R
=
ILIM(min)
SCP(min)
DS(on)max
V
I
R
=
TI Information — Selective Disclosure
SLUS886 – NOVEMBER 2008
www.ti.com
The TPS40197 provides three selectable short-circuit protection thresholds for the low-side FET: 100 mV, 200
mV and 280 mV. The particular threshold is selected by connecting a resistor from COMP to GND. Table 1
shows the short-circuit thresholds for corresponding resistors from COMP to GND. When designing the
compensation for the feedback loop, remember that a low impedance compensation network combined with a
long network time constant can cause the short-circuit threshold setting to not be as expected. The time constant
and impedance of the network connected from COMP to FB should be as in Equation 1 to guarantee no
interaction with the short-circuit threshold setting.
where
t is 1.15 ms, the sampling time of the short circuit threshold setting circuit
R1 and C1 are the values of the components in Figure 16
(1)
Figure 16. Short Circuit Threshold Feedback Network
Table 1. Circuit Threshold Voltage Selection
COMPARATOR RESISTANCE
CURRENT LIMIT THRESHOLD
RCOMP (k)
VOLTAGE VILIM (mV)
12 ±10%
280
OPEN
200
4 ±10%
100
The range of expected short-circuit current thresholds is shown in Equation 2 and Equation 3.
(2)
where
ISCP is the short circuit current
VILIM is the short-circuit threshold for the low-side MOSFET
RDS(on) is the channel resistance of the low-side MOSFET
(3)
14
Copyright 2008, Texas Instruments Incorporated
Product Folder Link(s): TPS40197
相關PDF資料 |
PDF描述 |
|---|---|
| TPS40200MDREPG4 | SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO8 |
| TPS40211DRCTG4 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40210DGQG4 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS40304ADRCT | SWITCHING CONTROLLER, PQCC10 |
| TPS40304ADRCR | SWITCHING CONTROLLER, PQCC10 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS40197RGYT | 功能描述:DC/DC 開關控制器 4.5-14V Inp Synch Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數量:1 最大工作溫度:+ 125 C 安裝風格: 封裝 / 箱體:CPAK |
| TPS40-20 | 制造商:TOTAL-POWER 制造商全稱:TOTAL-POWER 功能描述:40 WATT OPEN - FRAME SWITCHING POWER SUPPLY |
| TPS40200 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
| TPS40200_08 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
| TPS40200_081 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:WIDE INPUT RANGE NON-SYNCHRONOUS VOLTAGE MODE CONTROLLER |
發布緊急采購，3分鐘左右您將得到回復。