TDA4700 Datasheet, PDF (3/21 Pages) Siemens Semiconductor Group – Control IC for Single-Ended and Push-Pull Switched-Mode Power Supplies SMPS

Pin Definitions and Functions (TDA 4700)
Pin
Symbol
Function
1
GND
Ground 0 V
2
+ V_REF
3
+ V_S
4
Q2
5
Q1
Reference voltage
Supply voltage
Output Q2
Output Q1
6
I SYM Q2
Symmetry Q2
7
Q SYNC
Sync. output
8
C_{soft start}
Soft start
9
R_T
10
C_filter
11
C_T
VCO R_T
Capacitance
VCO C_T
12
R_R
13
C_R
Ramp generator R_R
Ramp generator C_R
14
I COMP
Comparator input
15
Q Op Amp
Operational amplifier output
16
– I Op Amp
Operational amplifier input (–)
17
+ I Op Amp
Operational amplifier input (+)
18
I SYNC
Sync. input
19
ON/OFF/IUV
ON/OFF, undervoltage
20
QOV
21
IOV
Overvoltage output
Overvoltage input
22
– I_DYN
Dynamic current limitation (–)
23
+ I_DYN
Dynamic current limitation (+)
24
I SYM Q1
Symmetry
TDA 4700
TDA 4718
Semiconductor Group
3