TDA4814A SIEMENS [Siemens Semiconductor Group], TDA4814A Datasheet - Page 5

• Manufacturer Part Number: TDA4814A
• Description: Power Factor Controller IC for High Power Factor and Active Harmonic Filter
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

TDA 4814
Output Driver
The output driver is intended to drive a SIPMOS transistor directly. It is designed as a push-pull
stage.
Both the capacitive input impedance and keeping the gate level at zero potential in standby
operation by an internal 10-k -resistor are taken into account. Possible effects on the output driver
by line inductances or capacitive couplings via SIPMOS transistor Miller capacitance are limited by
diodes connected to ground and supply voltage.
Ground Pins
Between the ground pins GND and GND QSIP, a very close and low-impedance connection is to
be established.
Monitoring Circuit (I START, I STOP, Q START, Q STOP)
The monitoring circuit guarantees the secure operation of subsequent circuitries.
Any circuitry that is shut down because of a fault, for instance, cannot be started up again until the
monitoring start (I START / Q START) has turned on and a positive voltage pulse has been
impressed on Q START. This function starts for example the lamp generator of an electronic ballast
or generates auxiliary trigger signals for the detector input.
If there is a defect present (e.g. defective fluorescent lamp) the monitoring stop (I STOP /
Q STOP) will shut down either the entire unit or simply the circuitry that has to be protected. No
restart is possible then until the hold current impressed on I START or Q STOP has been
interrupted (e.g. by a power down).
Semiconductor Group
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