- 您現在的位置：買賣IC網 > PDF目錄98285 > TPS62751DSKR (TEXAS INSTRUMENTS INC) 1.8 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 PDF資料下載
參數資料
| 型號： | TPS62751DSKR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩壓器 |
| 英文描述： | 1.8 A SWITCHING REGULATOR, 2500 kHz SWITCHING FREQ-MAX, PDSO10 |
| 封裝： | 2.50 X 2.50 MM, GREEN, PLASTIC, SON-10 |
| 文件頁數： | 13/30頁 |
| 文件大?。?/td> | 1733K |
| 代理商： | TPS62751DSKR |
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頁當前第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
LIM_U
1.23
Upper range: R
=
20000
I
÷
÷
è
LIM_L
1.23
Lower range: R
=
5400
I
÷
÷
è
+
470pF
SLVS955A – JULY 2009 – REVISED SEPTEMBER 2009 ................................................................................................................................................. www.ti.com
(7)
(8)
Examples of different input current limit values selectable are given in the table below:
AVERAGE INPUT
RESISTOR VALUE
CURRENT REQUIRED
50 mA
132.8 K
100 mA
66.5 K
400 mA
61.5 K
500 mA
49.2 K
600 mA
41 K
700 mA
35.1 K
CHECKING LOOP STABILITY
The first step of circuit and stability evaluation is to look from a steady-state perspective at the following signals:
Switching node, SW
Inductor current, IL
Output ripple voltage, VO(AC)
These are the basic signals that need to be measured when evaluating a switching converter. When the
switching waveform shows large duty cycle jitter or the output voltage or inductor current shows oscillations, the
regulation loop may be unstable. This is often a result of board layout and/or L-C combination.
As a next step in the evaluation of the regulation loop, the load transient response is tested. The time between
the application of the load transient and the turn on of the P-channel MOSFET, the output capacitor must supply
all of the current required by the load. VO immediately shifts by an amount equal to ΔI(LOAD) × ESR, where ESR is
the effective series resistance of CO. ΔI(LOAD) begins to charge or discharge CO generating a feedback error
signal used by the regulator to return VO to its steady-state value. The results are most easily interpreted when
the device operates in PWM mode.
During this recovery time, VO can be monitored for settling time, overshoot or ringing that helps judge the
converter’s stability. Without any ringing, the loop has usually more than 45° of phase margin. Because the
damping factor of the circuitry is directly related to several resistive parameters (e.g., MOSFET RDSon) that are
temperature dependant, the loop stability analysis has to be done over the input voltage range, load current
range, and temperature range.
Figure 27. Checking Loop Stability
20
Copyright 2009, Texas Instruments Incorporated
Product Folder Link(s) :TPS62750, TPS62751
相關PDF資料 |
PDF描述 |
|---|---|
| TPS63000IDRCRQ1 | 2.1 A SWITCHING REGULATOR, 1500 kHz SWITCHING FREQ-MAX, PDSO10 |
| TPS65011RGZT | 2-CHANNEL POWER SUPPLY SUPPORT CKT, PQCC48 |
| TPS65023QRHARQ1 | POWER SUPPLY SUPPORT CKT, PQCC40 |
| TPS65040ZQER | 8-CHANNEL POWER SUPPLY MANAGEMENT CKT, PBGA71 |
| TPS650531IRGERQ1 | POWER SUPPLY SUPPORT CKT, PQCC24 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| TPS62751DSKT | 功能描述:直流/直流開關調節器 2.25MHz 92% Eff Step Down Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS62770EVM-734 | 功能描述:TPS62770 - DC/DC, Step Up or Down 2, Non-Isolated Outputs Evaluation Board 制造商:texas instruments 系列:- 零件狀態:有效 主要用途:DC/DC，步升/步降 輸出和類型:2，非隔離 功率 - 輸出:- 電壓 - 輸出:- 電流 - 輸出:- 電壓 - 輸入:2.5 V ~ 5.5 V 穩壓器拓撲:降壓-升壓 頻率 - 開關:- 板類型:完全填充 所含物品:板 使用的 IC/零件:TPS62770 標準包裝:1 |
| TPS62770YFPT | 功能描述:Buck, Boost Switching Regulator IC Positive Programmable 1V, 4.5V (12V) 2 Output 300mA, 30mA, 100mA, 200mA 16-XFBGA, DSBGA 制造商:texas instruments 系列:- 包裝:剪切帶（CT） 零件狀態:有效 功能:升壓，降壓 輸出配置:正 拓撲:降壓，升壓 輸出類型:可編程 輸出數:2 電壓 - 輸入（最小值）:2.5V 電壓 - 輸入（最大值）:5.5V 電壓 - 輸出（最小值/固定）:1V，4.5V（12V） 電壓 - 輸出（最大值）:3V，15V 電流 - 輸出:300mA，30mA，100mA，200mA 頻率 - 開關:1.05MHz 同步整流器:是 工作溫度:-40°C ~ 85°C（TA） 安裝類型:表面貼裝 封裝/外殼:16-XFBGA，DSBGA 供應商器件封裝:16-DSBGA 標準包裝:1 |
| TPS63000DRCR | 功能描述:直流/直流開關調節器 96% Buck Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS63000DRCRG4 | 功能描述:直流/直流開關調節器 96% Buck Boost Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發布緊急采購，3分鐘左右您將得到回復。