TDA8385 Datasheet, PDF (11/21 Pages) NXP Semiconductors – Control circuit for a Self-Oscillating Power Supply SOPS

Philips Semiconductors
Control circuit for a Self-Oscillating
Power Supply (SOPS)
Preliminary specification
TDA8385
Regulation indicator output (Block X)
Pin 1 can be used to reset the logic circuit in the TV receiver at power on and off. Sub-section 29 has an open-collector
output. The output of this block is LOW during the regulation mode (V_diff < V_ts; see Fig.12).
handbook, full pagewidth
V
2.5
Vfb
Vts
0
Vdiff
t
VP
0
t
V
VRIO : open-collector output
RIO
0
t
MCD411
A desired delay at power-on reset can be made externally.
Fig.12 Regulation indicator output; pin 1.
March 1994
12