PR8275
High Voltage Start-Up PWM Controller
Electrical Characteristics
(TAꢀ=ꢀ+25°Cꢀunlessꢀotherwiseꢀstated,ꢀVccꢀ=15.0V)ꢀ
PARAMETERꢀ
PARAMETER CONDITIONSꢀ MINꢀ TYPꢀ MAXꢀ UNITSꢀ
High-Voltage Supply (HV Pin)ꢀ
HighꢁVoltageꢀCurrentꢀSourceꢀ
OffꢁStateꢀLeakageꢀCurrentꢀ
Vcc<ꢀUVLO(on),ꢀHV=500Vꢀ
Vcc>ꢀUVLO(off),ꢀHV=500Vꢀ
0.5ꢀ 1.0ꢀ 1.5ꢀ
mAꢀ
μAꢀ
ꢀ
ꢀ
35ꢀ
Supply Voltage (Vcc Pin)ꢀ
StartupꢀCurrentꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
100ꢀ
μAꢀ
mAꢀ
mAꢀ
mAꢀ
Vꢀ
OperatingꢀCurrentꢀ
(withꢀ1nFꢀloadꢀonꢀOUTꢀpin)ꢀ
VCOMP=0Vꢀ
VCOMP=3Vꢀ
Protectionꢀtrippedꢀ(OLP,ꢀOVP)ꢀ
2.0ꢀ 3.0ꢀ
2.5ꢀ 4.0ꢀ
0.5ꢀ
ꢀ
UVLOꢀ(off)ꢀ
UVLOꢀ(on)ꢀ
OVPꢀLevelꢀ
ꢀ
ꢀ
ꢀ
9.0ꢀ 10.0ꢀ 11.0ꢀ
15.0ꢀ 16.0ꢀ 17.0ꢀ
25.0ꢀ 27.5ꢀ 30.0ꢀ
Vꢀ
Vꢀ
Voltage Feedback (Comp Pin)ꢀ
ShortꢀCircuitꢀCurrentꢀ
OpenꢀLoopꢀVoltageꢀ
GreenꢀModeꢀThresholdꢀ
VCOMPꢀ
VCOMP=0Vꢀ
COMPꢀpinꢀopenꢀ
ꢀ
ꢀ
ꢀ
1.5ꢀ 2.2ꢀ
mAꢀ
Vꢀ
Vꢀ
6.0ꢀ
ꢀ
ꢀ
2.35ꢀ
ꢀ
Current Sensing (CS Pin)ꢀ
MaximumꢀInputꢀVoltageꢀ
LeadingꢀEdgeꢀBlankingꢀTimeꢀ
Inputꢀimpedanceꢀ
ꢀ
ꢀ
ꢀ
0.80ꢀ 0.85ꢀ 0.90ꢀ
Vꢀ
nSꢀ
MΩꢀ
nSꢀ
ꢀ
ꢀ
350ꢀ
ꢀ
1ꢀ
ꢀ
ꢀ
DelayꢀtoꢀOutputꢀ
ꢀ
ꢀ
100ꢀ
ꢀ
Oscillator (RT pin)ꢀ
Frequencyꢀ
60.0ꢀ 65.0ꢀ 70.0ꢀ KHzꢀ
RT=100KΩꢀ
Fs=65.0KHzꢀ
(ꢁ40°Cꢀ~105°C)ꢀ
(Vccꢀ=11Vꢁ25V)ꢀ
GreenꢀModeꢀFrequencyꢀ
Temp.ꢀStabilityꢀ
ꢀ
ꢀ
20ꢀ
ꢀ
ꢀ
3ꢀ
KHzꢀ
%ꢀ
VoltageꢀStabilityꢀ
Gate Drive Output (OUT Pin)ꢀ
OutputꢀLowꢀLevelꢀ
ꢀ
ꢀ
1ꢀ
%ꢀ
Vccꢀ=15V,ꢀIo=20mAꢀ
Vccꢀ=15V,ꢀIo=20mAꢀ
LoadꢀCapacitance=1000pFꢀ
LoadꢀCapacitance=1000pFꢀ
ꢀ
ꢀ
1ꢀ
ꢀ
Vꢀ
Vꢀ
nSꢀ
nSꢀ
OutputꢀHighꢀLevelꢀ
9ꢀ
ꢀ
ꢀ
ꢀ
RisingꢀTimeꢀ
FallingꢀTimeꢀ
50ꢀ 160ꢀ
30ꢀ
60ꢀ
OLP (Over Load Protection)ꢀ
OLPꢀTripꢀLevelꢀ
OLPꢀDelayꢀTimeꢀ(note)ꢀ
Note: The OLP delay time is proportional to the period of switching cycle. So that, the lower RT value will
ꢀ
ꢀ
ꢀ
5.0ꢀ
30ꢀ
ꢀ
ꢀ
Vꢀ
mSꢀ
Fs=65KHzꢀ
set the higher switching frequency and the shorter OLP delay time.
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
ꢀ
V1.0
4/10
ETC [ ETC ]
