- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄98281 > TPS40071PWPR (TEXAS INSTRUMENTS INC) 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 PDF資料下載
參數(shù)資料
| 型號(hào)： | TPS40071PWPR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類(lèi)： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, HTSSOP-16 |
| 文件頁(yè)數(shù)： | 27/28頁(yè) |
| 文件大小： | 655K |
| 代理商： | TPS40071PWPR |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)當(dāng)前第27頁(yè)第28頁(yè)
C u
V
IN * 8 V
R
SR
(1)
R t
0.2 V
f
SW
Q
g(TOT) ) IDD
(2)
SETTING THE SWITCHING FREQUENCY (PROGRAMMING THE CLOCK OSCILLATOR)
R
T +
1
f
SW(kHz)
17.82
10*6
* 23
kW
(3)
100
1.5
0.5
1000
200
300
400 500
600
700
800 900
1.0
3.0
2.0
2.5
4.5
3.5
4.0
5.0
MINIMUM OUTPUT VOLTAGE
vs
FREQUENCY
fOSC - Oscillator Frequency - kHz
V
O
U
T
-
Output
V
oltage
-
V
VIN = 28 V
VIN = 24 V
VIN = 18 V
VIN = 15 V
VIN = 12 V
VIN = 10 V
VIN = 8 V
VIN = 5 V
fSW - Switching Frequency - kHz
SWITCHING FREQUENCY
vs
TIMING RESISTANCE
0
100
0
200
400
600
800
1000
200
300
400
500
600
R
T
-
T
iming
Resistance
-
k
PROGRAMMING THE RAMP GENERATOR CIRCUIT AND UVLO
SLUS582J – DECEMBER 2003 – REVISED APRIL 2009 .................................................................................................................................................. www.ti.com
where
V
VIN is the final value of the input voltage ramp
f
SW is the switching frequency
Q
g(TOT) is the combined total gate charge for both upper and lower MOSFETs (from MOSFET data sheet)
I
DD is the TPS4007x input current (3.5 mA maximum)
SR is the maximum allowed slew rate [12×104] (V/s)
The TPS4007x has independent clock oscillator and PWM ramp generator circuits. The clock oscillator serves as
the master clock to the ramp generator circuit. Connecting a single resistor from RT to ground sets the switching
frequency of the clock oscillator. The clock frequency is related to RT by:
Figure 2.
Figure 3.
The ramp generator circuit provides the actual ramp used by the PWM comparator. The ramp generator provides
voltage feed-forward control by varying the PWM ramp slope with line voltage, while maintaining a constant ramp
magnitude. Varying the PWM ramp directly with line voltage provides excellent response to line variations since
the PWM does not have to wait for loop delays before changing the duty cycle. (See Figure 9).
The PWM ramp must reach approximately 1 V in amplitude during a clock cycle, or the PWM is not allowed to
start. The PWM ramp time is programmed via a single resistor (RKFF) connected from KFF VDD. RKFF , VSTART
and RT are related by (approximately):
8
Copyright 2003–2009, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS40070PWPR | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| TPS40074RHLT | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20 |
| TPS40074RHLRG4 | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20 |
| TPS40074RHL | 2 A SWITCHING CONTROLLER, 550 kHz SWITCHING FREQ-MAX, PQCC20 |
| TPS40075RHLR | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PQCC20 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40071PWPRG4 | 功能描述:DC/DC 開(kāi)關(guān)控制器 Mid Rg In Sync Buck Cntrlr source/sink RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40074 | 制造商:TI 制造商全稱(chēng):Texas Instruments 功能描述:MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD |
| TPS40074EVM-001 | 功能描述:電源管理IC開(kāi)發(fā)工具 TPS40074 001 EVAL Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類(lèi)型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS40074RHLR | 功能描述:DC/DC 開(kāi)關(guān)控制器 Mid Input Sync Buck w/Vltg Feed-Fwd RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| TPS40074RHLRG4 | 功能描述:DC/DC 開(kāi)關(guān)控制器 Mid Input Sync Buck w/Vltg Feed-Fwd RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開(kāi)關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。