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TN22-1500B-TR

P1-P3P4-P6P7-P9P10-P12P13-P14
Characteristics TN22
4/14 DocID3768 Rev 5
Figure 5. Relative variation of gate trigger and
holding current versus junction temperature
Figure 6. Surge peak on-state current versus
number of cycles
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Figure 7. Non-repetitive surge peak on-state
current for sinusoidal pulse
Figure 8. On-state characteristics
(maximum values)
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Figure 9. Maximum allowable RMS current
versus time conduction and initial case
temperature
Figure 10. Maximum allowable RMS current
versus time conduction and initial case
temperature
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DocID3768 Rev 5 5/14
TN22 Characteristics
14
Figure 11. Holding current versus gate-cathode resistance (typical values)
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Application information TN22
6/14 DocID3768 Rev 5
2 Application information
2.1 Overview
The TN22 has been designed for use as a fluorescent tube starter switch.
As shown in Figure 12, the starter circuit is divided in five parts:
1. Rectifier bridge: to rectify mains voltage.
2. Voltage detector: RCD circuit used to switch on the TN22.
3. Preheating time control: RC circuit used to switch on the SCR, so turn off the TN22.
4. Ignition circuit: made of sensitive SCR and TN22 devices.
5. Reset control: resistor used to discharge the C2 capacitor and to reset the circuit.
Figure 12. Electronic starter schematic
FLUORESCENTFLUORESCENT
TUBE
MAINS
VOLTAGE
SWITCH
INDUCTANCE
BALLAST
Rectifier
Reset control
Ignition circuit
Preheating
time control
Preheating
time control
Voltage detector
SCR
mains
mains
-
+
D2 – D5
TN22
+
C1
+
C2
R1
R4
R3
R2
D6
D1
I
T
V
S
1
2
3
4
5
Starter circuit
P1-P3P4-P6P7-P9P10-P12P13-P14

TN22-1500B-TR

Mfr. #:
Buy TN22-1500B-TR
Manufacturer:
STMicroelectronics
Description:
SCRs THYRISTOR
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

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