TDA1675A
AC ELECTRICAL CHARACTERISTICS
(Refer to A.C. test circuit of fig. 2, Tamb = 25oC, VS = 24V, f = 50Hz, unless otherwise specified)
Symbol
Parameter
Supply Current
Test conditions
Min. Typ. Max. Unit
IS
I5
IY = 2APP
295
mA
µA
V
Sync Input Current Required to Sync
Flyback Voltage
100
V1
V3
Iy = 2App
I5 = 0
50
Peak-to-peak Oscillator Sawtooth
Voltage
3.6
3.4
V
V
I5 = 100µA
V10TH(L) Start Scan Level of the Input Ramp
1.85
0.6
V
tFLY
Flyback Time
Iy = 2App
ms
tBLANK
Blanking Pulse Duration
fo = 50Hz, Tj = 75oC
1.33
42
1.4
1.47
46
ms
ms
fo = 60Hz, Tj = 75oC
1.17
fo
Free Running Frequency
Ro = 7.5kΩ, Co = 330nF, Tj = 75oC
Ro = 6.2kΩ, Co = 330nF, Tj = 75oC
43.5
52.5
Hz
Hz
∆f
Synchronization Range
I5 = 100µA, Tj = 75oC
14
16
Hz
oC
Tj
Junction Temperature for Thermal
Shut-down
145
VON
Peak-to-peak Output Noise
35 mVPP
Figure 2 : AC Test Circuit
1N4001
220µF
+V
S
t
I
y
f
t blank
2.4kΩ
V
1
BLANKING
OUT
GND
13
14
15
2
1/fo
100µA
t sync.
SYNC. IN
5
6
1
YOKE
10mH
TDA 1675A
I
Y
0.22µF
2.4k
A
B
Ω
S1 (Ro)
12
4
4.7k
Ω
(FREQ.)
3
7
9
11
10
8
o
C
tblank
2200µF
0.1µF
47µF
0.1µF
56kΩ 100kΩ
1/fo
R
I
V3
f y
1/fo
1/fo
Rf
SERVICE
SWITCH
V
V
LINEARITY
10
10thL
S2
220kΩ
0.1µF
GND
HEIGHT
4/11
STMICROELECTRONICS [ ST ]
