IR21571S International Rectifier, IR21571S Datasheet - Page 7

• Manufacturer Part Number: IR21571S
• Description: IC BALLAST CONTROL 16-SOIC
• Manufacturer: International Rectifier
• Type: Ballast Controllerr

Specifications of IR21571S

• Frequency: 45.5 ~ 50.5 kHz
• Current - Supply: 5.5mA
• Current - Output: 500mA
• Voltage - Supply: 11.4 V ~ 15.6 V
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 16-SOIC (3.9mm Width)
• Package: 16-lead SOIC Narrow
• Circuit: Fluorescent Ballast IC
• Offset Voltage (v): 625
• Output Source Current Min (ma): 250
• Output Sink Current Min (ma): 400
• Vcc Range (v): 10-25V with UVLO
• Output Voltage Min (v): 10
• Output Voltage Max (v): 25
• Special Ic: Fully Integrated
• Pbf: PbF Option Available
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *IR21571S

IR21571 State Diagram
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FAULT Mode
Fault Latch Set
1
VCC = 15.6V
I
Oscillator Off
QCC
/
2
CPH = 0V
-Bridge Off
CS > CS+ Threshold
(Over-Current or Hard Switching)
CS < 0.2V
(No-Load or Below Resonance)
T
(Over-Temperature)
J
> 160C
150 A
SD > 2.0V
(Lamp Removal)
VCC < 9.5V
(Power Turned Off)
or
or
or
CS > CS+ Threshold
(Failure to Strike Lamp
or Hard Switching)
T
(Over-Temperature)
J
> 160C
or
T
(Over-Temperature)
J
> 160C
IGNITION RAMP Mode
CPH Charging @ I
CPH Charges to 7.6V Clamp
CPH Charging @ I
Power Turned On
PREHEAT Mode
CS+ Threshold Enabled
CS- Threshold Enabled
RUN = Open Circuit
RPH = Open Circuit
RUN = Open Circuit
RPH = Open Circuit
UVLO Mode
1
f
MIN
/
f
1
I
Oscillator Off
2
CS Disabled
PH
RUN Mode
QCC
/
-Bridge @ f
2
CPH = 0V
RPH = 0V
-Bridge Off
Ramps to f
RUN = 0V
ramps to f
150 A
VCC > 11.4V (UV+)
VDC > 5.1V (Bus OK)
SD < 1.7V (Lamp OK)
T
CPH > 4.0V
(End of PREHEAT Mode)
CPH > 5.1V
(End of IGNITION RAMP)
J
< 160C (T
PH
PH
and
and
and
PH
MIN
RUN
= 1 A
= 1 A
jmax
)
IR21571 (S) & (PbF)
VCC < 9.5V
(VCC Fault or Power Down)
VDC < 3.0V
(dc Bus/ac Line Fault or Power Down)
SD > 2.0V
(Lamp Fault or Lamp Removal)
or
or
7