TDA8385 Philips Semiconductors, TDA8385 Datasheet - Page 3

• Manufacturer Part Number: TDA8385
• Description: Control circuit for a Self-Oscillating Power Supply SOPS
• Manufacturer: Philips Semiconductors

Philips Semiconductors
March 1994
Control circuit for a Self-Oscillating
Power Supply (SOPS)
handbook, full pagewidth
latch
stand-by voltage input
18
OVER-VOLTAGE PROTECTION
discharge
V sb
100 A
Fig.2 Block diagram; part B (continued from Fig.1; part A).
slow
V sim
100 mV
2.5 V
V r
10
(28)
26
25
STAND-BY
21
10
2.5 V
8
PWM
2 V
demagnetization
(17)
IV
S
R
IX
SAWTOOTH GENERATOR
FF
Q
Q
comparator
DELAY
4
13
Q
FF
V c
23
R
S
12
16
demagnetization
(28)
LED CONTROL
latch
OUTPUT
0.2 I
LED DRIVER
STAGE
I sim
24
22
11
17
12
14
I peak
over voltage
TDA8385
15
9
115 mV
2.5 V
115 mV
DEM
VIII
LED
I 12
II
VI
V
Q (23)
MCD418
12
15
Preliminary specification
2
5
6
8
current simulation
demagnetization
delay setting
over-voltage
LED driver output
peak-current
setting input
protection
TDA8385
input
input