TDA8385 Philips Semiconductors, TDA8385 Datasheet - Page 13

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

Philips Semiconductors
CHARACTERISTICS
V
March 1994
Supply
V
V
V
I
V
Reference voltage
V
Error amplifier
V
I
I
I
G
B
V
Transfer characteristic generator
I
V
t
t
Feed forward
V
I
SYMBOL
P
16
9
11
11
4
PLH
PHL
13
V
P
16
16(hys)
11
3
9
5
/I
5
5
Control circuit for a Self-Oscillating
Power Supply (SOPS)
o
= 15 V; I
9
3
/ T
3
supply voltage (pin 16)
supply initialization level
internal fixed hysteresis
supply current
supply voltage ripple rejection
reference voltage at pin 3
threshold voltage error amplitude
input current feedback input
sink current output
source current output
open loop gain
unity gain bandwidth
temperature coefficient
threshold for switching output
current ratio
threshold for switching output
response time pulse width
modulation pin 5 to pin 2
LOW-to-HIGH
response time pulse width
modulation pin 5 to pin 2
HIGH-to-LOW
threshold for switching output
(V
input bias current
= 200 A; T
T
V
V
V
clamp
fo
on(min)
fb
fb
fb
)
= 20%
= 50%
= 80%
PARAMETER
amb
= 25 C; unless otherwise specified.
active LED output
see Figs 13 and 14
V
V
V
V
V
V
V
V
note 2
note 2
V
V
I
V
2
11
11
diff
4
7
4
4
7
4
7
13
V
V
V
V
V
= 2 mA; V
= 2 V; V
= 0.5 V
= 0.5 V; V
= 0.5 V; V
= V
CONDITIONS
9
9
9
9
9
= 80 mV
= 2.5 V
= 0 V
= 1.25 V;
V
V
= 0 V
= 0.4 V
= 1 V
= 1.6 V
= 2.25 V
9
9
9
; I
; I
= 3 V;
2
2
14
= 2 mA
= 2 mA
13
11
13
13
= 0 V;
= 1 V
= 0 V;
= 0 V;
7.9
7.1
2.5
0.52
2.4
400
500
0.23
0.4
1.4 V
2.4 V
0.6
MIN.
V
V
os
os
os
os
7.5
60
0.55
2.5
100
600
V
0.25
0.5
0.9 V
1.5 V
2.1 V
0.7
300
diff
TYP.
V
V
V
os
os
os
os
os
10
os
(1)
Preliminary specification
6
20
7.9
2.55
20
0.58
2.6
0.5
0.27
0.6
1.6
2.6 V
700
1
0.8
1
MAX.
TDA8385
V
V
V
os
os
os
os
V
V
V
mA
mV
V
V
dB
kHz
K
V
V
V
V
V
V
ns
V
UNIT
A
A
A
s
A
1