tca280b Hendon Semiconductors, tca280b Datasheet - Page 14

• Manufacturer Part Number: tca280b
• Description: General Purpose Triggering Circuit
• Manufacturer: Hendon Semiconductors

or thyristor. The pulses coincide with the zero crossings of the mains voltage. The arrangement forms a full-wave AC controller when used with
Fig.9 Typical application of the TCA280B as a single-phase control circuit. The circuit produces bursts of trigger pulses at the gate of the triac
AC mains
V S
− U
13
RX2
BYX10
Rd
4.7 kΩ
(8 W)
SUPPLY
DC
16
V EE
11
V CC
680 µF
(16 V)
C1
a triac, and a controlled half-wave rectifier when used with a thyristor.
ENZ
R1
1 MΩ
PW
12
1
DETECTOR
CROSSING
ZERO-
(16 V)
2
1 µF
QZ
C2
R2
22 kΩ
V control
IC−
IC+
6
5
DIFFERENCE
AMPLIFIER
3
RX1
R3
330 kΩ
150 kΩ
4
7
QC+
QC−
R4
270
kΩ
R5
C3
1.5 nF
IS
14
GENERATOR
SAWTOOTH
100 kΩ
15
QS
R6
82 kΩ
R7
INHA
IA
8
9
AMPLIFIER
OUTPUT
10
82 Ω
QA
R G
Fig-9-cct
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