TDA8385 Datasheet, PDF (16/21 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
VP
Vdiff
(pin 11)
15 V 2 V
~~ _{3 V}
t
MCD412
Frequency = 50 kHz.
Slew rate = 0.2 µs.
Fig.13 Supply voltage ripple rejection;
V_P as a function of time.
t
MCD413
Frequency = 50 kHz.
Slew rate = 0.2 µs.
Fig.14 Supply voltage ripple rejection;
V_diff as a function of time.
Table 1 Condition of test circuit used for Figs 13 and 14.
PINS
1, 2, 4 to 6, 12, 13
8 to 10, 14, 15
3
7
16
11
STATUS
not connected
ground
R_ref = 2.7 kΩ
C_ss = 4.7 µF
V_P; see Fig.13
V_diff; see Fig.14
March 1994
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