tca280b Hendon Semiconductors, tca280b Datasheet - Page 5

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

Integrated Electronic Solutions, Hendon, South Australia
5
5.1
6
2002 Nov 08
General purpose triggering circuit
and diode
external
resistor
positive
PINNING INFORMATION
BLOCK DIAGRAM
supply
Pinning layout
V CC
RX2
INHA
QC+
QC−
11
13
RX1
IC+
IC−
PW
QZ
Fig.1 Pin configuration
4
1
2
5
6
7
8
3
SUPPLY
ground
TCA280B
DC
16
TCA280B
V EE
control input
pulse width
1
PW
16
15
13
12
11
10
14
9
CROSSING
DETECTOR
enable input
V EE
QS
V CC
IS
RX2
QA
IA
ENZ
ZERO-
12
ENZ
280-pin
detector output
Fig.2 Block diagram
zero-crossing
QZ
2
external
resistor
comparator non-
RX1
4
3
inverting input
5.2
PW
QZ
RX1
QC+
IC+
IC
QC
INHA
IA
QA
V
ENZ
RX2
IS
QS
V
SYMBOL
inverting output
CC
EE
DIFFERENCE
comparator
AMPLIFIER
5
IC+
inverting input
Pin description
comparator
QC−
7
comparator non-
inverting output
6
IC−
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN
QC+
4
pulse width control input
zero-crossing detector output
external resistor
comparator non-inverting output
comparator non-inverting input
comparator inverting input
comparator inverting output
output stage inhibiting input
output stage input
output stage output
positive supply
enable input, zero crossing detector
external resistor and diode
sawtooth generator trigger input
sawtooth generator output
negative supply
GENERATOR
SAWTOOTH
trigger input
generator
sawtooth
output
15
14
QS
IS
DESCRIPTION
inhibiting input
output stage
AMPLIFIER
OUTPUT
8
INHA
TCA280B
output
output
stage
output stage
10
QA
input
Data Sheet
9
IA
280-block