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IR2520 Datasheet(PDF) 6 Page - International Rectifier

Part # IR2520
Description  ADAPTIVE BALLAST CONTROL IC
PDF  17 Pages
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Manufacturer  IRF [International Rectifier]
Direct Link  http://www.irf.com
Logo IRF - International Rectifier

IR2520 Datasheet(HTML) 6 Page - International Rectifier

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IR2520D(S)&(PbF)
6
www.irf.com
State Diagram
All values are typical
Power Turned
On
VCCUV Mode
VCC > 12.6V
(VCCUV+)
VCC < 10V
(VCCUV-)
V
= 0V
VCC < 10V
(VCCUV-)
IQCC
≅ 45
-Bridge Off
1/
2
Crest Factor > 5.0
(CSCF)
or
V
< 0.82V
(V
)
V
= 0V
Frequency Sweep Mode
VCO ramps up, frequency ramps down
Crest Factor Disabled
V
= 5.1V
RUN Mode
V
= 6.0V, Frequency = fmin
Crest Factor Enabled
ZVS Enabled
If non-ZVS detected then V
decreases
and frequency increases to maintain ZVS
FAULT
Mode
V
= 0V
ZVS Disabled
VCO
VCO
FMIN
FMIN
VCO
FMIN
VCO
VCOSD
µA
V
>4.8V
VCO
(V
_RUN)
VCO
-Bridge Off
1/2
V
= 0V
VCO
100
QCCFLT ≅
I
µA



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