- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98283 > TPS55383PWPRG4 (TEXAS INSTRUMENTS INC) 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 PDF資料下載
參數(shù)資料
| 型號： | TPS55383PWPRG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 7 A DUAL SWITCHING CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | PLASTIC, HTSSOP-26 |
| 文件頁數(shù)： | 8/45頁 |
| 文件大小： | 1318K |
| 代理商： | TPS55383PWPRG4 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當前第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頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
5-V VOUT1
(2 V/div)
3.3-V VOUT2
(2 V/div)
T - Time - 1 ms/div
Soft Start
SLUS818 – SEPTEMBER 2008 ......................................................................................................................................................................................... www.ti.com
If the SEQ pin is left floating, Output 1 and Output 2 each start ratiometrically when both outputs are enabled at
the same time. Output 1 and Output 2 soft start at a rate that is determined by the respective final output
voltages and enter regulation at the same time. If the EN1 and EN2 pins are allowed to operate independently,
then the two outputs also operate independently.
Figure 20. SEQ Pin Floating
Each output has a dedicated soft-start circuit. The soft-start voltage is an internal digital reference ramp to one of
two noninverting inputs of the error amplifier. The other input is the (internal) precision 0.8-V reference. The total
ramp time for the FB voltage to charge from 0 V to 0.8 V is about 2.1 ms. During a soft-start interval, the
TPS5538x output slowly increases the voltage to the noninverting input of the error amplifier. In this way, the
output voltage ramps up slowly until the voltage on the noninverting input to the error amplifier reaches the
internal 0.8-V reference voltage. At that time, the voltage at the noninverting input to the error amplifier remains
at the reference voltage.
During the soft-start interval, pulse-by-pulse current limiting is in effect. If an overcurrent pulse is detected, six
PWM pulses are skipped to allow the inductor current to decay before another PWM pulse is applied. (See the
Output Overload Protection section.) There is no pulse skipping if a current limit pulse is not detected.
DESIGN HINT
If the rate of rise of the input voltage (PVDDx) is such that the input voltage is too low
to support the desired regulation voltage by the time soft-start has completed, then
the output UV circuit may trip and cause a hiccup in the output voltage. In this case,
use a timed delay startup from the ENx pin to delay the startup of the output until the
PVDDx voltage has the capability of supporting the desired regulation voltage. See
Operating Near Maximum Duty Cycle and Maximum Output Capacitance for related
information.
16
Copyright 2008, Texas Instruments Incorporated
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TPS5602IDBR | 3 A DUAL SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS5602IDBTRG4 | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS5602IDBTR | 3 A DUAL SWITCHING CONTROLLER, 202.4 kHz SWITCHING FREQ-MAX, PDSO30 |
| TPS561000PWP | 1.4 A SWITCHING CONTROLLER, PDSO28 |
| TPS56100PWPR | 1.4 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO28 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TPS55386EVM-363 | 功能描述:電源管理IC開發(fā)工具 TPS55386EVM-363 Eval Mod RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| TPS55386PWP | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPR | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| TPS55386PWPRG4 | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 3A,Dual Non-Synch Buck Converter RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)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(shù)量: 最大工作溫度: 安裝風格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
發(fā)布緊急采購，3分鐘左右您將得到回復。