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參數(shù)資料
| 型號： | L296 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | HIGH CURRENT SWITCHINGREGULATORS |
| 中文描述： | 大電流SWITCHINGREGULATORS |
| 文件頁數(shù)： | 19/22頁 |
| 文件大?。?/td> | 285K |
| 代理商： | L296 |
Figure43 :
5.1V/2APowerSupplyusing External
LimitingCurrent Resistorand Crow-
barProtectionon theSupplyVoltage
(L296Ponly)
SOFT-START AND REPETITIVE POWER-ON
Whenthedeviceisrepetitivelypowered-on,thesoft-
start capacitor, C
SS
, must be dischargedrapidly to
ensurethateachstartis”soft”.Thiscanbeachieved
economicallyusingtheresetcircuit,asshowninFig-
ure44.
InthiscircuitthedividerR1,R2 connectedto pin12
determines the minimum supply voltage, below
whichthe opencollectortransistorat thepin14out-
put dischargesC
SS
.
Figure44
Figure45
Figure46
Theapproximatedischargetimesobtainedwiththis
circuitare :
CSS (
μ
F)
2.2
4.7
10
tDIS (
μ
s)
200
300
600
Ifthesetimesarestilltoolong,anexternalPNPtran-
sistor may be added, as shown in Figure 45 ; with
this circuit discharge times of a few microseconds
maybe obtained.
HOW TO OBTAIN BOTH RESET AND
POWER FAIL
Figure46illustrateshowitispossibleto obtainat the
same time both the power fail and reset functions
simplybyaddingonediode(D)andoneresistor(R).
In this case the Reset delay time (pin 13) can only
startwhen theoutputvoltageis V
O
≥
V
REF
- 100mV
andthe voltageaccrossR2 is higherthan4.5V.
Withthehysteresisresistoritispossibletofixthein-
put pin 12 hysteresisin order to increaseimmunity
to the 100Hzripple presenton the supplyvoltage.
Moreover, the power fail and reset delay time are
automaticallylocked tothesoft-start.Soft-startand
delayedreset arethus two sequentialfunctions.
The hysteresis resistor should be In the range of
aboit100k
andthe pull-up resistor of 1to 2.2k
.
L296 - L296P
19/22
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| L296P | HIGH CURRENT SWITCHINGREGULATORS |
| L296HT | HIGH CURRENT SWITCHINGREGULATORS |
| L298HN | DUAL FULL-BRIDGE DRIVER |
| L298 | DUAL FULL-BRIDGE DRIVER |
| L298N | DUAL FULL-BRIDGE DRIVER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| L296 | 制造商:STMicroelectronics 功能描述:IC SWITCHING REG 160W 296 |
| L296BK | 功能描述:LAMP MAG 33" ARM W/CLAMP 3D RoHS:否 類別:光學(xué)檢測設(shè)備 >> 燈 - 放大，工作 系列:IM 標(biāo)準(zhǔn)包裝:1 系列:Magna 燈/放大鏡類型:燈，關(guān)節(jié)式 電壓:115V 透鏡樣式/尺寸:- 燈泡:熒光燈，15W（2） 燈臂:45.00"（1143.0mm） 顏色:- 線纜長度:5'（1.5m） 重量:12 磅（5.4kg） 安裝類型:夾架，邊緣 |
| L296BK (Black) | 功能描述:助聽器與助視器 POLARIS 3D MAGNIFIER BLACK RoHS:否 制造商:Luxo Corporation 安裝風(fēng)格:Metal Base 長度:30 in 顏色:Light Gray |
| L296HT | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.1 to 40V Step-Down 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
| L296P | 功能描述:直流/直流開關(guān)調(diào)節(jié)器 5.1 to 40V Step-Down 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(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5 |
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