- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98281 > TPS40070PWPRG4 (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： | TPS40070PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | GREEN, PLASTIC, HTSSOP-16 |
| 文件頁數(shù)： | 26/28頁 |
| 文件大小： | 655K |
| 代理商： | TPS40070PWPRG4 |
第1頁第2頁第3頁第4頁第5頁第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頁當(dāng)前第26頁第27頁第28頁
APPLICATION INFORMATION
MINIMUM PULSE WIDTH
SLEW RATE LIMIT ON VDD
15
9
16
13
12
10
ILIM
HDRV
SW
LDRV
VDD
PGND
TPS40070
C
R
VIN
UDG05058
+
_
www.ti.com .................................................................................................................................................. SLUS582J – DECEMBER 2003 – REVISED APRIL 2009
The TPS40070 family of parts allows the user to construct synchronous voltage-mode buck converters with
inputs ranging from 4.5 V to 28 V and outputs as low as 700 mV. Predictive gate drive circuitry optimizes
switching delays for increased efficiency and improved converter output power capability. Voltage feed-forward is
employed to ease loop compensation and provide better line transient response.
A converter based on the TPS40070 operates as a single quadrant (source only) converter at all times. When
the rectifier FET is on and the controller senses that current is near zero in the inductor, the rectifier FET is
turned off, preventing the buildup of negative or reverse current in the inductor. This feature prevents the
converter from pulling energy from its output and forcing that energy onto its input.
Converters based on the TPS40071 operates as a two quadrant converter all the time (source and sink current).
This is the controller of choice for most applications.
The TPS4007x devices have limitations on the minimum pulse width that can be used to design a converter.
Reliable operation is guaranteed for nominal pulse widths of 250 ns and above. This places some restrictions on
the conversion ratio that can be achieved at a given switching frequency. Figure 2 shows minimum output
voltage for a given input voltage and frequency.
The regulator that supplies power for the drivers on the TPS40070/1 requires a limited rising slew rate on VDD
for proper operation if the input voltage is above 10 V. If the slew rate is too great, this regulator can over shoot
and damage to the part can occur. To ensure that the part operates properly, limit the slew rate to no more than
0.12 V/
s as the voltage at VDD crosses 8 V. If necessary, an R-C filter can be used on the VDD pin of the
device. Connect the resistor from the VDD pin to the input supply of the converter. Connect the capacitor from
the VDD pin to PGND. There should not be excessive (more than a 200-mV) voltage drop across the resistor in
normal operation. This places some constraints on
the R-C values that can be used. Figure 1 is a schematic
fragment that shows the connection of the R-C slew rate limit circuit. Equation 1 and Equation 2 give values for R
and C that limits the slew rate in the worst case condition.
Figure 1. Limiting the Slew Rate
Copyright 2003–2009, Texas Instruments Incorporated
7
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS40071PWPR | 2 A SWITCHING CONTROLLER, 1000 kHz SWITCHING FREQ-MAX, PDSO16 |
| 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 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS40071 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:HIGH-EFFICIANCY MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH VOLTAGE FEED-FORWARD |
| TPS40071EVM-001 | 功能描述:EVAL MODULE FOR TPS40071-001 RoHS:是 類別:編程器，開發(fā)系統(tǒng) >> 評估板 - DC/DC 與 AC/DC（離線）SMPS 系列:Predictive Gate Drive™ 產(chǎn)品培訓(xùn)模塊:Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:True Shutdown™ 主要目的:DC/DC，步升 輸出及類型:1，非隔離 功率 - 輸出:- 輸出電壓:- 電流 - 輸出:1A 輸入電壓:2.5 V ~ 5.5 V 穩(wěn)壓器拓?fù)浣Y(jié)構(gòu):升壓 頻率 - 開關(guān):3MHz 板類型:完全填充 已供物品:板 已用 IC / 零件:MAX8969 |
| TPS40071PWP | 功能描述:DC/DC 開關(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 |
| TPS40071PWPG4 | 功能描述:DC/DC 開關(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 |
| TPS40071PWPR | 功能描述:DC/DC 開關(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，3分鐘左右您將得到回復(fù)。