Philips Semiconductors
Proportional-control triac triggering circuit
Product specification
TDA1023/T
FEATURES
• Adjustable width of proportional range
• Adjustable hysteresis
• Adjustable width of trigger pulse
• Adjustable repetition timing of firing burst
• Control range translation facility
• Fail safe operation
• Supplied from the mains
• Provides supply for external temperature bridge
APPLICATIONS
• Panel heaters
• Temperature control
GENERAL DESCRIPTION
The TDA1023 is a bipolar integrated circuit for controlling
triacs in a proportional time or burst firing mode. Permitting
precise temperature control of heating equipment it is
especially suited to the control of panel heaters.
It generates positive-going trigger pulses but complies with
regulations regarding mains waveform distortion and RF
interference.
QUICK REFERENCE DATA
SYMBOL
PARAMETER
MIN. TYP. MAX. UNIT
VCC
VZ
I16(AV)
tw
Tb
-IOH(1)
Tamb
supply voltage (derived from mains voltage)
stabilized supply voltage for temperature bridge
supply current (average value)
trigger pulse width
firing burst repetition time at CT = 68 µF
output current
operating ambient temperature range
− 13.7 −
V
−8−
V
− 10 −
mA
− 200 −
µs
− 41 −
s
− − 150 mA
−20 − +75 °C
Note
1. Negative current is defined as conventional current flow out of a device. A negative output current is suited for
positive triac triggering.
ORDERING INFORMATION
EXTENDED
TYPE NUMBER
TDA1023
TDA1023T
PINS
16
16
PIN POSITION
DIL
mini-pack
PACKAGE
MATERIAL
plastic
plastic
Note
1. TDA1023: 16 DIL; plastic (SOT38); SOT38-1; 1996 November 27.
2. TDA1023T: 16 mini-pack; plastic (SO16; SOT109A); SOT109-1; 1996 November 27.
CODE
SOT38(1)
SO16; SOT109A(2)
May 1991
2