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WT7527

型号：

WT7527

品牌：

WELTREND[ WELTREND SEMICONDUCTOR ]

页数：

12 页

PDF大小：

243 K

下载PDF手册
ꢀ ꢀ ꢀ  
偉詮電子股份有限公司  
Weltrend Semiconductor, Inc.  
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WT7527  
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PC POWER SUPPLY SUPERVISOR  
Data Sheet  
Version 1.20  
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June 22, 2007  
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The information in this document is subject to change without notice.  
Weltrend Semiconductor, Inc. All Rights Reserved.  
新竹市科學工業園區工業東九路24號2樓ꢀ  
2F,ꢀNo.ꢀ24,ꢀIndustryꢀE.ꢀ9thꢀRD.,ꢀScienceꢁBasedꢀIndustrialꢀPark,ꢀHsinꢁChu,ꢀTaiwanꢀ  
TEL:886ꢁ3ꢁ5780241ꢀ ꢀ FAX:886ꢁ3ꢁ5794278.5770419ꢀ  
Email:support@weltrend.com.tw  
WT7527  
Rev. 1.20  
ꢀ
GENERAL DESCRIPTION  
TheꢀWT7527ꢀprovidesꢀprotectionꢀcircuits,ꢀpowerꢀgoodꢀoutputꢀ(PGO),ꢀfaultꢀprotectionꢀlatchꢀ(FPOB),ꢀ  
andꢀaꢀprotectionꢀdetectorꢀfunctionꢀ(PSONB)ꢀcontrol.ꢀItꢀcanꢀminimizeꢀexternalꢀcomponentsꢀofꢀswitchingꢀ  
powerꢀsupplyꢀsystemsꢀinꢀpersonalꢀcomputer.ꢀ  
TheꢀOverꢀVoltageꢀDetectorꢀ(OVD)ꢀmonitorsꢀVX,ꢀV33,ꢀV5,ꢀV12AꢀandꢀV12Bꢀinputꢀvoltageꢀlevel.ꢀTheꢀ  
UnderꢀVoltageꢀDetectorꢀ(UVD)ꢀmonitorsꢀV33,ꢀV5,ꢀV12AꢀandꢀV12Bꢀinputꢀvoltageꢀlevel.ꢀTheꢀOverꢀCurrentꢀ  
Detectorꢀ(OCD)ꢀmonitorꢀI33&V33,ꢀI5&V5,ꢀI12A&V12AꢀandꢀI12B&V12Bꢀinputꢀcurrentꢀsense.ꢀTheꢀpinꢀVXꢀ  
providesꢀanꢀextraꢀprotectionꢀfunction.ꢀWhenꢀOVDꢀorꢀUVDꢀorꢀOCDꢀorꢀVXꢀdetectꢀtheꢀfaultꢀvoltageꢀlevel,ꢀ  
theꢀFPOBꢀisꢀlatchedꢀHIGHꢀandꢀPGOꢀgoꢀlow.ꢀTheꢀlatchꢀcanꢀbeꢀresetꢀbyꢀPSONBꢀgoꢀHIGH.ꢀThereꢀisꢀ4ꢀmsꢀ  
delayꢀtimeꢀforꢀPSONBꢀturnꢀoffꢀFPOB.ꢀ  
WhenꢀOVDꢀandꢀUVDꢀandꢀOCDꢀdetectꢀtheꢀrightꢀvoltageꢀlevel,ꢀtheꢀpowerꢀgoodꢀoutputꢀ(PGO)ꢀwillꢀbeꢀ  
issue.ꢀ  
ꢀ
FEATURES  
•ꢀ ꢀ TheꢀOverꢀVoltageꢀDetectorꢀ(OVD)ꢀmonitorsꢀVX,ꢀV33,ꢀV5,ꢀV12AꢀandꢀV12Bꢀinputꢀvoltage.ꢀ  
•ꢀ ꢀ TheꢀUnderꢀVoltageꢀDetectorꢀ(UVD)ꢀmonitorsꢀV33,ꢀV5,ꢀV12AꢀandꢀV12Bꢀinputꢀvoltage.ꢀ  
•ꢀ ꢀ TheꢀOverꢀCurrentꢀDetectorꢀ(OCD)ꢀmonitorsꢀI33&33,ꢀI5&V5,ꢀI12A&V12AꢀandꢀI12B&V12Bꢀinputꢀpins.ꢀ  
•ꢀ TheꢀVXꢀ>ꢀ1.2Vꢀprovideꢀanꢀextraꢀprotection.ꢀ  
•ꢀ Bothꢀofꢀtheꢀpowerꢀgoodꢀoutputꢀ(PGO)ꢀandꢀfaultꢀprotectionꢀlatchꢀ(FPOB)ꢀareꢀOpenꢀDrainꢀOutput.ꢀ  
•ꢀ ꢀ 75ꢀ/ꢀ600ꢀmsꢀtimeꢀdelayꢀforꢀUVDꢀ/ꢀOCDꢀ/ꢀVXꢀ.ꢀ  
•ꢀ ꢀ 300ꢀmsꢀtimeꢀdelayꢀforꢀPGO.ꢀ  
•ꢀ ꢀ 38ꢀmsꢀforꢀPSONBꢀinputꢀsignalꢀDe–bounce.ꢀ  
•ꢀ ꢀ 14ꢀusꢀforꢀOVDꢀinternalꢀsignalꢀDe–glitch.ꢀ  
•ꢀ ꢀ 60ꢀusꢀforꢀUVDꢀ/ꢀVXꢀinternalꢀsignalꢀDe–glitch.ꢀ  
•ꢀ ꢀ 20ꢀmsꢀforꢀOCDꢀinternalꢀsignalꢀDe–glitch.ꢀ  
•ꢀ ꢀ 73ꢀusꢀforꢀPGIꢀinternalꢀsignalꢀDe–glitch.ꢀ  
•ꢀ ꢀ 4ꢀmsꢀforꢀPSONBꢀturnꢁoffꢀFPOB.ꢀ  
ꢀ
PIN ASSIGNMENT AND PACKAGE TYPE  
Pin assignment  
WT7527  
1
2
3
4
5
6
7
8ꢀ  
16  
15  
14  
13  
12  
11  
10  
9ꢀ  
PGI  
PGO  
VCC  
V5  
GND  
FPOB  
PSONB  
I12A  
V33  
V12A  
I33  
RI  
I12B  
I5  
V12B  
ꢀ
VX  
ꢀ
Weltrend Semiconductor, Inc.  
Pageꢀ2  
WT7527  
Rev. 1.20  
ꢀ
ORDERING INFORMATION  
ꢀ
Part Number  
WT7527–NN160–1D  
WT7527–NN161–1D  
WT7527–SN160–1D  
WT7527–SN161–1D  
Package Type  
Note  
16-Pin Plastic DIP, Pb-free  
16-Pin Plastic SOP, Pb-free  
PIN DESCRIPTION  
PinꢀNameꢀ I/Oꢀ  
Descriptionꢀ  
ꢀ PGIꢀ  
Iꢀ  
Pꢀ  
Powerꢀgoodꢀinputꢀsignalꢀpinꢀ  
Groundꢀ  
ꢀ GNDꢀ  
ꢀ FPOBꢀ  
ꢀ PSONBꢀ  
ꢀ I12Aꢀ  
ꢀ RIꢀ  
Oꢀ Faultꢀprotectionꢀoutputꢀpin,ꢀopenꢀdrainꢀoutputꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
On/Offꢀswitchꢀinputꢀ  
12VAꢀoverꢀcurrentꢀprotectionꢀsenseꢀinputꢀ ꢀ  
Currentꢀsenseꢀadjustꢀinputꢀ  
12VBꢀoverꢀcurrentꢀprotectionꢀsenseꢀinputꢀ ꢀ  
12VBꢀoverꢀvoltageꢀ&ꢀunderꢀvoltageꢀ&ꢀoverꢀcurrentꢀsenseꢀinputꢀ  
pinꢀ  
ꢀ I12Bꢀ  
ꢀ V12Bꢀ  
ꢀ VXꢀ  
ꢀ I5ꢀ  
ꢀ I33ꢀ  
ꢀ V12Aꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
Extraꢀprotectionꢀsenseꢀinputꢀ ꢀ  
5Vꢀoverꢀcurrentꢀprotectionꢀsenseꢀinputꢀ  
3.3Vꢀoverꢀcurrentꢀprotectionꢀsenseꢀinputꢀ  
12VAꢀoverꢀvoltageꢀ&ꢀunderꢀvoltageꢀ&ꢀoverꢀcurrentꢀsenseꢀinputꢀ  
pinꢀ  
ꢀ V33ꢀ  
ꢀ V5ꢀ  
ꢀ VCCꢀ  
ꢀ PGOꢀ  
Iꢀ  
Iꢀ  
Iꢀ  
3.3Vꢀoverꢀvoltageꢀ&ꢀunderꢀvoltageꢀ&ꢀoverꢀcurrentꢀsenseꢀinputꢀpinꢀ  
5Vꢀoverꢀvoltageꢀ&ꢀunderꢀvoltageꢀ&ꢀoverꢀcurrentꢀsenseꢀinputꢀpinꢀ  
Powerꢀsupplyꢀ ꢀ  
Oꢀ Powerꢀgoodꢀoutputꢀsignalꢀpin,ꢀopenꢀdrainꢀoutputꢀ  
ꢀ
Weltrend Semiconductor, Inc.  
Pageꢀ3  
WT7527  
Rev. 1.20  
ꢀ
BLOCK DIAGRAM  
ꢀ
WT7527-160  
VCC  
PowerꢀOnꢀReset  
PWR  
PWR  
VCCI  
38ms  
4ms  
clr  
PSONB  
debounce  
delay  
1.2Vꢀ~ꢀ1.8V  
Bandgap  
VREFꢀ=ꢀ1.2V  
Reference  
75msꢀ/ꢀ600ms  
delay  
clr  
VREFꢀ=ꢀ1.2V  
ꢁUN  
V33  
+
Internal  
VCCIꢀ=ꢀ3.6V  
Power  
ꢁOV  
+
ꢁUN  
V5  
V12A  
V12B  
+
PWR  
ꢁOV  
+
OSC  
CLK  
ꢁUN  
+
ꢁOV  
clr  
+
60us  
ꢁUN  
debounce  
+
ꢁOV  
+
R
S
FPOB  
clr  
14us  
Q
debounce  
ꢁOV  
VX  
+
PGO  
clr  
73us  
300ms  
delay  
ꢁ
clr  
PGI  
+
debounce  
V12A  
ꢁ
I33  
+
V12A  
IREFꢀ*ꢀ8  
V12A  
VREFꢀ=ꢀ1.2V  
+
ꢁ
V12A  
IREF=VREFꢀ/ꢀRI  
ꢁ
+
RI  
I5  
IREFꢀ*ꢀ8  
V12A  
ꢁ
I12A  
+
IREFꢀ*ꢀ8  
clr  
20ms  
V12A  
debounce  
ꢁ
I12B  
+
IREFꢀ*ꢀ8  
ꢀ ꢀ  
Weltrend Semiconductor, Inc.  
Pageꢀ4  
WT7527  
Rev. 1.20  
ꢀ
ABSOLUTE MAXIMUM RATINGS  
Parameterꢀ  
Supplyꢀvoltage,ꢀVCC,ꢀV12Aꢀ  
PGI,ꢀPSONBꢀ  
Min.  
Max.  
Unit  
Vꢀ  
Vꢀ  
–0.3ꢀ  
16ꢀ  
VCCꢀ+ꢀ0.3（Max.ꢀ7V）ꢀ  
V12Aꢀ+ꢀ0.3（Max.ꢀ7V）ꢀ  
V12Aꢀ+ꢀ0.3（Max.ꢀ16V）ꢀ  
VCCꢀ+ꢀ0.3（Max.ꢀ7V）ꢀ  
16ꢀ  
Inputꢀvoltageꢀ  
–0.3ꢀ  
V5,ꢀI5,ꢀV33,ꢀI33ꢀ  
Vꢀ  
I12A,ꢀV12B,ꢀI12Bꢀ  
Vꢀ  
PGOꢀ  
FPOBꢀ  
–0.3ꢀ  
–0.3ꢀ  
ꢁ40ꢀ  
Vꢀ  
Vꢀ  
℃ꢀ  
℃ꢀ  
Outputꢀvoltageꢀ  
Operatingꢀtemperatureꢀ  
Storageꢀtemperatureꢀ  
ꢀ
ꢀ
125ꢀ  
ꢁ55ꢀ  
150ꢀ  
*Note:ꢀStressesꢀaboveꢀthoseꢀlistedꢀmayꢀcauseꢀpermanentꢀdamageꢀtoꢀtheꢀdevicesꢀ  
ꢀ
RECOMMENDED OPERATING CONDITIONS  
Parameter  
Conditions  
Min.  
Typ. Max. Unit  
Supplyꢀvoltage,ꢀVCCꢀ  
Inputꢀvoltageꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
3.8ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
5ꢀ ꢀ  
16ꢀ  
7ꢀ  
16ꢀ  
7ꢀ  
16ꢀ  
10ꢀ  
10ꢀ  
65ꢀ  
Vꢀ  
Vꢀ  
Vꢀ  
Vꢀ  
Vꢀ  
mAꢀ  
mAꢀ  
uAꢀ  
PGI,ꢀPSONB,ꢀV5,ꢀV33ꢀ  
V12A,ꢀV12Bꢀ  
PGOꢀ  
FPOBꢀ  
FPOBꢀ  
PGOꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Outputꢀvoltageꢀ  
Outputꢀsinkꢀcurrentꢀ  
OutputꢀcurrentꢀforꢀRIꢀ  
0.3Vꢀ  
0.3Vꢀ  
ꢀ
RIꢀ  
10ꢀ  
ꢀ
ELECTRICAL CHARACTERISTICS, at Ta=25°C and VCC=5V  
.
Over Voltage Detection  
Parameter  
Condition  
Min.  
Typ.  
Max.  
Unit  
ꢀ V33ꢀ  
ꢀ V5ꢀ  
ꢀ V12ABꢀ  
ꢀ VXꢀ  
ꢀ
ꢀ
ꢀ
3.8ꢀ  
5.6ꢀ  
3.9ꢀ  
5.8ꢀ  
4.0ꢀ  
6.0ꢀ  
Vꢀ  
Vꢀ  
Vꢀ  
Vꢀ  
uAꢀ  
Vꢀ  
Overꢀvoltageꢀthresholdꢀ  
13.5ꢀ 13.85ꢀ 14.2ꢀ  
1.176ꢀ 1.20ꢀ 1.224ꢀ  
5ꢀ  
UseꢀUVDꢀtimingꢀ  
V(FPOB)ꢀ=ꢀ5Vꢀ  
Isinkꢀ=10mAꢀ  
ILEAKAGEꢀ ꢀ Leakageꢀcurrentꢀ(FPOB)ꢀ  
VOLꢀLowꢀlevelꢀoutputꢀvoltageꢀ(FPOB)ꢀ  
ꢀ
ꢀ
0.3ꢀ  
PGI and PGO  
Parameter  
ꢀ V33ꢀ  
Condition  
Min.  
Typ.  
Max.  
Unit  
ꢀ
ꢀ
2.8ꢀ  
4.2ꢀ  
2.9ꢀ  
4.4ꢀ  
3.0ꢀ  
4.6ꢀ  
Vꢀ  
Vꢀ  
Underꢀvoltageꢀthresholdꢀ  
ꢀ V5ꢀ  
ꢀ V12ABꢀ  
ꢀ
ꢀ
10.3ꢀ 10.65ꢀ 11.0ꢀ  
1.176ꢀ 1.20ꢀ 1.224ꢀ  
5ꢀ  
Vꢀ  
Vꢀ  
uAꢀ  
Vꢀ  
mVꢀ  
Inputꢀthresholdꢀvoltage(PGI)ꢀ  
ILEAKAGEꢀ ꢀ Leakageꢀcurrent(PGO)ꢀ  
VOLꢀLowꢀlevelꢀoutputꢀvoltage(PGO)ꢀ  
OffsetꢀVoltageꢀofꢀOCPꢀcomparatorsꢀ ꢀ  
PGOꢀ=ꢀ5Vꢀ  
Isinkꢀ=10mAꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
0.3ꢀ  
6ꢀ  
–6ꢀ  
PSONB  
Parameter  
Condition  
Min.  
Typ.  
Max.  
Unit  
Inputꢀpullꢁupꢀcurrentꢀ  
Highꢁlevelꢀinputꢀvoltageꢀ  
Lowꢁlevelꢀinputꢀvoltageꢀ  
PSONB=ꢀ0Vꢀ  
ꢀ
ꢀ
ꢀ
1.8ꢀ  
ꢀ
150ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
uAꢀ  
Vꢀ  
Vꢀ  
1.2ꢀ  
Weltrend Semiconductor, Inc.  
Pageꢀ5  
WT7527  
Rev. 1.20  
ꢀ
TOTAL DEVICE  
Parameter  
Condition  
PSONB=ꢀ5Vꢀ  
ꢀ
ꢀ
Min.  
Typ.  
Max.  
Unit  
IccꢀSupplyꢀcurrentꢀ  
Vccꢀoperationꢀstartꢀupꢀvoltageꢀ  
Vccꢀunderꢀlockoutꢀvoltageꢀ  
ꢀ
ꢀ
1ꢀ  
3.6ꢀ  
3.2ꢀ  
mAꢀ  
Vꢀ  
Vꢀ  
3.2ꢀ  
2.8ꢀ  
3.4ꢀ  
3.0ꢀ  
SWITCHING CHARACTERISTICS, at Ta=-40℃~125℃  
Parameter  
Condition  
Min.  
Typ.  
Max.  
Unit  
PGIꢀtoꢀPGOꢀDelayꢀTimeꢀ ꢀ  
Td1ꢀ  
Td2ꢀ  
ꢀ
ꢀ
200ꢀ  
49ꢀ  
392ꢀ  
300ꢀ  
75ꢀ  
600ꢀ  
∞ꢀ  
400ꢀ  
100ꢀ  
800ꢀ  
mSꢀ  
mSꢀ  
mSꢀ  
mSꢀ  
mSꢀ  
ꢁSꢀ  
mSꢀ  
uSꢀ  
ꢁSꢀ  
Forꢀ160ꢀ  
Forꢀ161ꢀ  
ShortꢀcircuitꢀDelayꢀTimeꢀ ꢀ  
Td2ꢁ1ꢀ  
PGOꢀtoꢀFPOBꢀDelayꢀTimeꢀ  
UnderꢀVoltageꢀDelayꢀTimeꢀ  
OverꢀCurrentꢀDelayꢀTimeꢀ  
OverꢀVoltageꢀDelayꢀTimeꢀ  
VXꢀDelayꢀTimeꢀ  
Td3ꢀ  
Td4ꢀ  
Td5ꢀ  
Td6ꢀ  
Td7ꢀ  
Tb1ꢀ  
Tb2ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
2ꢀ  
4ꢀ  
6ꢀ  
81ꢀ  
27ꢀ  
19ꢀ  
81ꢀ  
52ꢀ  
100ꢀ  
40ꢀ  
13ꢀ  
9ꢀ  
40ꢀ  
24ꢀ  
47ꢀ  
60ꢀ  
20ꢀ  
14ꢀ  
60ꢀ  
38ꢀ  
73ꢀ  
PSONBꢀDeꢁbounceꢀTimeꢀ  
PGIꢀDeꢁbounceꢀTimeꢀ  
mSꢀ  
ꢁSꢀ  
APPLICATION CIRCUIT  
+5VSB  
D1  
+5V  
WT752701  
+5VSB  
1K  
PGO  
R4=100  
PGI  
PGI  
PGO  
VCC  
V5  
+5VSB  
+5VSB  
10K  
GND  
FPOB  
PSONB  
I12A  
+3.3V  
+5V  
R5=300  
PSONB  
V33  
V12A  
I33  
0.01uF  
22uF  
R12,ꢀ1%  
30K,ꢀ1%  
RI  
22uF  
R10,ꢀ1%  
I12B  
I5  
V12B  
VX  
+12VA  
22uF  
R14,ꢀ1%  
+12VB  
22uF  
R16,ꢀ1%  
ꢀ
NOTE1：TheꢀseriesꢀresistorꢀR5ꢀatꢀPSONBꢀcanꢀnotꢀbeꢀomitted.（R5ꢀ=ꢀ300Ωꢀ isꢀsuggested）ꢀ  
NOTE2：TheꢀseriesꢀresistorꢀR4ꢀ=ꢀ100Ωꢀ andꢀdiodeꢀD1ꢀatꢀPGOꢀisꢀsuggested.  
Weltrend Semiconductor, Inc.  
Pageꢀ6  
WT7527  
Rev. 1.20  
ꢀ
ꢀ
APPLICATION NOTE  
ꢀ
ꢀ
ꢀ
ꢀ
Whenꢀtheꢀloadꢀcurrentꢀincreased,ꢀtheꢀvoltageꢀ(VL)ꢀcrossꢀtheꢀinductorꢀisꢀincreased.ꢀ  
Andꢀwhenꢀinductorꢀvoltageꢀexceedsꢀtheꢀresistorꢀvoltageꢀ(VR),ꢀtheꢀOCPꢀisꢀactive.ꢀ  
ꢀ
Sometimesꢀ powerꢁonꢀ orꢀ loadꢀ dynamicsꢀ willꢀ causeꢀ falseꢀ outputꢀ ofꢀ overꢁcurrentꢀ detection.ꢀ Itꢀ canꢀ beꢀ  
solvedꢀbyꢀconnectingꢀaꢀcapacitorꢀbetweenꢀVSꢀpinꢀandꢀISꢀpin.ꢀInꢀtypicalꢀcase,ꢀCꢀ≥ꢀ0.47uFꢀisꢀsuggested.ꢀ  
ꢀ
ꢀ
OCPꢀpointꢀcanꢀbeꢀcalculatedꢀbyꢀtheꢀfollowingꢀequation:ꢀ  
ꢀ
LetꢀVRꢀ=ꢀVLꢀ ꢀ  
ꢀ
R × IR = RL × IL  
ꢀ
VREF  
RI  
Q IR = 8× IREF = 8×  
RL× IL  
ꢀ
∴R =  
ꢀ
VREF  
8×  
RI  
ꢀ
Forꢀexample：ꢀ ꢀ  
AssumeꢀRI=30Kꢂ,ꢀRL=5mꢂ,ꢀOCPꢀIL=20A.ꢀ  
ꢀ
Sol：Rꢀ=ꢀ(ꢀILꢀ*ꢀRLꢀ)ꢀ/ꢀ(ꢀ8ꢀ*ꢀIREFꢀ)ꢀ  
=ꢀ(ꢀ20Aꢀ*ꢀ5mꢁ)ꢀ/ꢀ{ꢀ8ꢀ*ꢀ(ꢀ1.2Vꢀ/ꢀ30Kꢁ)}ꢀ  
=ꢀ312.5ꢁ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
Weltrend Semiconductor, Inc.  
Pageꢀ7  
WT7527  
Rev. 1.20  
ꢀ
APPLICATION TIMMING  
ꢀ
1.) PGI (UNDER_VOLTAGE)：  
ꢀ
ꢀ
ꢀ
PSONB  
td3ꢀ  
ꢀ
ꢀ
FPOB  
tb1ꢀ  
ꢀ
td1+tb2ꢀ  
td1+tb2ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
PGO  
PGI  
tb1ꢀ  
tb2ꢀ  
Weltrend Semiconductor, Inc.  
Pageꢀ8  
WT7527  
Rev. 1.20  
ꢀ
ꢀ
2.) V33, V5, V12 (UNDER_VOLTAGE) or I33, I5, I12 (OVER_CURRENT) or  
VX (OVER_VOLTAGE)：  
ꢀ
ꢀ
ꢀ
PSONB  
td3ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
FPOB  
PGO  
tb1ꢀ  
td1+tb2ꢀ  
tb1ꢀ  
V33/V5/V12  
ꢀ
ꢀ
I33/I5/I12/VX  
ꢀ
ꢀ
td2=75mS  
ꢀ
PSONB  
ꢀ
ꢀ
ꢀ
ꢀ
td2+td4ꢀ/ꢀtd5ꢀ/ꢀtd7ꢀ  
td3ꢀ  
FPOB  
tb1ꢀ  
tb1ꢀ  
td1+tb2ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
PGO  
PGI  
tb1ꢀ  
V33/V5/V12  
ꢀ
ꢀ
I33/I5/I12/VX  
td2ꢁ1=600mS  
ꢀ
PSONB  
FPOB  
PGO  
tb3ꢀ  
td2ꢁ1+td4ꢀ/ꢀtd5ꢀ/ꢀtd7ꢀ  
tb1ꢀ  
tb1ꢀ  
td1+tb2ꢀ  
tb1ꢀ  
PGI  
V33/V5/V12  
I33/I5/I12/VX  
Weltrend Semiconductor, Inc.  
Pageꢀ9  
WT7527  
Rev. 1.20  
ꢀ
ꢀ
3.) V33, V5, V12 (OVER_VOLTAGE)：  
ꢀ
ꢀ
ꢀ
PSONB  
td3ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
FPOB  
PGO  
tb1ꢀ  
td1+tb2ꢀ  
tb1ꢀ  
V33/V5/V12  
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
PSONB  
ꢀ
ꢀ
td6ꢀ  
td3ꢀ  
ꢀ
ꢀ
FPOB  
tb1ꢀ  
tb1ꢀ  
td1+tb2ꢀ  
ꢀ
ꢀ
ꢀ
ꢀ
PGO  
tb1ꢀ  
V33/V5/V12  
ꢀ
Weltrend Semiconductor, Inc.  
Pageꢀ10  
WT7527  
Rev. 1.20  
ꢀ
ꢀ
MECHANICAL INFORMATION  
PLASTIC DUAL–IN–LINE PACKAGE  
ꢀ
ꢀ
NOTEꢀ1：Allꢀlinearꢀdimensionsꢀareꢀinꢀinches（millimeters）.ꢀ  
NOTEꢀ2：Thisꢀdrawingꢀisꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.ꢀ  
NOTEꢀ3：FallsꢀwithinꢀJEDECꢀMS–001ꢀ  
Weltrend Semiconductor, Inc.  
Pageꢀ11  
WT7527  
Rev. 1.20  
ꢀ
ꢀ
PLASTIC SMALL–OUTLINE PACKAGE  
ꢀ
ꢀ
NOTEꢀ1：Allꢀlinearꢀdimensionsꢀareꢀinꢀinches（millimeters）.ꢀ  
NOTEꢀ2：Thisꢀdrawingꢀisꢀsubjectꢀtoꢀchangeꢀwithoutꢀnotice.ꢀ  
NOTEꢀ3：FallsꢀwithinꢀJEDECꢀMS–012ꢀ  
ꢀ
ꢀ
Weltrend Semiconductor, Inc.  
Pageꢀ12  
厂商 型号 描述 页数 下载

ETC

 		WT7012 双电机驱动器和DC- DC转换器[ DUAL MOTOR DRIVER AND DC-DC CONVERTER ] 3 页

WELTREND

 		WT7062 5V的3相无传感器风扇电机驱动器[ 5V 3-phase sensor-less fan motor driver ] 16 页

ETC

 		WT7220 电流调节器用于LED[ Current Regulator for LED ] 4 页

WELTREND

 		WT7502 [ PC POWER SUPPLY SUPERVISOR ] 10 页

WELTREND

 		WT7502-N084 [ PC POWER SUPPLY SUPERVISOR ] 10 页

WELTREND

 		WT7502-N084Pb [ PC POWER SUPPLY SUPERVISOR ] 10 页

WELTREND

 		WT7502-S084 [ PC POWER SUPPLY SUPERVISOR ] 10 页

WELTREND

 		WT7502-S084Pb [ PC POWER SUPPLY SUPERVISOR ] 10 页

ETC

 		WT7510 保护电路，电源良好输出（ PGO ） ，故障保护锁存器（ FPL_N ）控制[ protection circuits, power good output (PGO), fault protection latch (FPL_N) CONTROL ] 1 页

ETC

 		WT7510-N080WT-12 保护电路，电源良好输出（ PGO ） ，故障保护锁存器（ FPL_N ）控制[ protection circuits, power good output (PGO), fault protection latch (FPL_N) CONTROL ] 1 页

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