TDA4700A Siemens Semiconductor, TDA4700A Datasheet - Page 13

• Manufacturer Part Number: TDA4700A
• Description: Control IC for Single-Ended and Push-Pull Switched-Mode Power Supplies SMPS
• Manufacturer: Siemens Semiconductor

Characteristics (cont’d)
V
Parameter
Oscillator (VCO)
Frequency range
Frequency change
Frequency change
Tolerance
Fall time sawtooth
RC combination
VCO
Ramp Generator
Frequency range
Maximum voltage
at
Minimum voltage
at
Input current
through
Current
transformation ratio
Synchronization
Sync output
Sync input
Input current
Semiconductor Group
S
C
C
= 11 to 30 V;
R
R
R
R
T
A
= – 25 to 85 C
Symbol
f
t
t
C
R
f
V
V
I
I
V
V
V
V
–
VCO
RR
RR
f
f
f
T
H
L
Q H
Q L
I H
I L
T
I
/
/
/
f
f
f
I
/
VCO
VCO
VCO
I
CR
min.
40
– 1
– 7
0.82
5
40
0
4
2
Limit Values
13
typ.
0.5
1
10
5.5
1.8
1/4
max.
100 000
1
7
47
700
100 000
400
0.4
0.8
5
Unit
Hz
%
%
%
nF
k
Hz
V
V
V
V
V
V
s
s
A
A
Test
Condition
14 V
25 V
C
C
I
I
Q H
Q L
R
T
T
T
= 1 nF
= 10 nF
TDA 4700
TDA 4718
= 1.6 mA
= – 200 A
= 0;
20 %
20 %
C
T
= 0