TDA8385 Philips Semiconductors, TDA8385 Datasheet - Page 14

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

Philips Semiconductors
March 1994
Slow-start
I
I
V
V
Output stage
V
I
V
Current simulation
I
V
V
Demagnetization input
t
t
V
V
C
I
SYMBOL
7
7
2
5
demLH
demHL
15
V
/I
7
5
2(sat)
2
/I
12
5(sat)
15
15
Control circuit for a Self-Oscillating
Power Supply (SOPS)
15
3
12
charge current ratio
quick discharge current
clamping level
threshold for switching output
(V
saturation voltage
source current
open output voltage HIGH
current ratio
simulation input voltage
saturation voltage
threshold for switching output;
voltage difference between pins 5
and 11; offset simulation voltage
(V
delay from pin 15 to pin 5
LOW-to-HIGH
delay from pin 15 to pin 5
HIGH-to-LOW
clamping level
demagnetization threshold
voltage
input capacitance
input bias current
ss
os
positive
negative
operating
initialization phase
)
)
PARAMETER
V
V
V
I
V
V
V
I
V
I
V
I
V
I
V
I
V
V
I
V
see Fig.15;
pin 6 not connected
see Fig.15
I
V
7
2
2
12
5
5
2
15
7
7
7
4
7
9
2
5
15
15
4
7
11
15
= 100 A
= 2 mA
= 5 mA
= 1 mA
= 200 A
= 2 mA;
= 0.5 V
= 1 V
= 100 mV
= 0.5 V; V
= 1 V; I
= 2 V
= 2 V
= 1 V; I
= 0.5 V; V
= V
= 0.5 mA
= 10 mA
CONDITIONS
= 0.5 V
= V
= V
= 60 mV
9
6
6
= 3 V;
= 0 V;
= 0 V;
12
15
2
= 2 mA;
= 0.5 mA 0.19
13
13
= 0 V;
= 0 V;
0.22
20
50
2.8
1.4 V
4.8
12
60
90
MIN.
os
0.24
3.0
1.5
5.3
0.2
100
115
TYP.
V
os
Preliminary specification
0.26
3.2
1.6 V
300
6.3
50
0.21
1.1
300
200
140
500
1
1.2
140
10
0.5
1
MAX.
TDA8385
os
mA
V
V
mV
mA
V
V
mV
mV
mV
ns
V
V
mV
pF
UNIT
A
A
s
A