November 1982

8

Philips Semiconductors

Product specification

Vertical deflection circuit

TDA2654

Tab

The tab is used as negative supply (ground) connection. Therefore, the tab should be well connected to the negative side

of the power supply.

Controlled switch-on

This feature is achieved by charging the a.c. coupling capacitor (C4; connected to pin 6) from an internal current source

of about 2 mA (voltage limited to maximum 15 V) for a short period after switch-on. The charging time can be influenced

by the value of C5 (connected to pin 7). Discharging of C4 results in a slowly increasing deflection current after a delay

of about 1 second. The blanking voltage at pin 1 is high during this delay.