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FEATURESDESCRIPTION
UDG−97047−1
凸轮 CAO
OVP
ovp (+ 17.5%)
ov
ov (+ 9%)
VSNS
VFB
电压
放大器
电流
放大器
3 v
UV
uv (−9%)
s
右
q
turn
开启
延迟
电流 感觉
放大器
rt
PWRGD
VDRVHI
GATEHI
PGND
反 十字形
条件
转弯
开启
延迟
rt
VDRVLO
GATELO
折返
电流
限制
1.37 v
VSNS
X16
比较
ISOUT
IS−
IS+
输出 偏移量
5 v 参考
D0
D1
D2
D3
D4
d/c 变频器
2 v − 3.5 v, 100 mv
或
1.3 v − 2.05 v, 50 mv
命令
ct rt
osc
VIN
10.5 v/10 v
UVLO
4.3 v/4.2 v
5 v
参考
地
VREF
VIN
en
4
6
15
16
8
7
27
26
24
23
22
6
1
20 14
13
2
19
18
12
10
11
28
21
9
17
ucc3882/-1
SLUS294A–MARCH1999–REVISEDOCTOBER2005
AVERAGECURRENTMODESYNCHRONOUS
controllerwith5-bitdac
•
combineddac/voltagemonitorandpwm
TheUCC3882combineshighprecisionreferenceand
WithSynchronousRectificationFunctions
voltagemonitoringcircuitrywithaveragecurrent
modePWMsynchronousrectificationcontroller
•
5-bitdigital-至-模拟(dac)变频器
circuitrytopowerhigh-endmicroprocessorswitha
•
1%dac/referencecombinedaccuracy
minimumofexternalcomponents.theucc3882
•
Compatiblewith5Vand12VSystemsand12
converts5Vor12Vtoanadjustableoutputranging
v-onlysystems
from1.8vdcto2.05vdcin50mvstepsand
2.1vdcto3.5vdcin100mvstepswith1%dc
•
LowOffsetCurrentSenseAmplifier
systemaccuracy.
•
ProgrammableOscillatorFrequencyPractical
to700kHz
•
FoldbackCurrentLimiting
•
OvervoltageandUndervoltageFaultWindows
•
2-
Ω
TotemPoleOutputswithProgrammable
deadtimestoeliminatecross-传导
•
ChipDisableFunction
BLOCKDIAGRAM
pleasebeawarethatanimportantnoticeconcerningavailability,标准保修,anduseincriticalapplicationsoftexas
instrumentssemiconductorproductsanddisclaimerstheretoappearsattheendofthisdatasheet.
productiondatainformationiscurrentasofpublicationdate.
copyright©1999–2005,texasinstrumentsincorporated
ProductsconformtospecificationsperthetermsoftheTexas
instrumentsstandardwarranty.productionprocessingdoesnot
必要包括测试所有参数.
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