TDA4700 Datasheet, PDF (14/21 Pages) Siemens Semiconductor Group – Control IC for Single-Ended and Push-Pull Switched-Mode Power Supplies SMPS

TDA 4700
TDA 4718
Characteristics (cont’d)
V_S = 11 to 30 V; T_A = – 25 to 85 °C
Parameter
Symbol
Limit Values
min.
typ. max.
Comparator K2
Input current
Turn-OFF delay¹⁾
Input voltage
– I_{I K2}
t_{D OFF}
V_{I K2}
Common-mode input
voltage range
V_{I C}
0
Soft Start K3, K4
2
500
1.8
5
5.5
Charge current for
C_{soft start}
I_ch
6
Discharge current for
C_{soft start}
I_dch
2
Upper limiting voltage V_lim
5
Switching voltage K4 V_K4
1.5
Operational Amplifier K1 (TDA 4700; TDA 4700 A)
Open-loop voltage
gain
Input offset voltage
Temperature
coefficient of V_IO
Input current
Common-mode input
voltage range
Output current
Rise time of output
voltage
Transition frequency
Phase at f_T
Output voltage
G_V0
V_IO
TC
– I_I
V_IC
I_Q
∆V/∆t
f_T
ϕ_T
V_{Q H/L}
60
– 10
– 30
0
–3
1.5
1) _{At the input: step function ∆V = – 100 mV}
80
10
30
2
5
1.5
1
3
120
5.5
∆V = + 100 mV
Unit Test
Condition
µA
ns
for duty cycle
V
D=0
V
D = max.
V
µA
µA
V
V
dB
mV
µV/K
µA
V
mA
V/µs
MHz
deg.
V
– 3 mA < I < 1.5 mA
Semiconductor Group
14