ALTAIR04-900 Datasheet, PDF (10/29 Pages) STMicroelectronics – Off-line all-primary-sensing switching regulator

Electrical characteristics
Figure 6. Quiescent current test circuit
ALTAIR04-900
I q_ me as A
14 V
VD D
D R AI N
2.5 V +
FB/ZCD ^-
C U R R EN T
C ON TR OL
3 3k
C O MP
I R EF
GND SOURCE
0 .8V
3V
10k
0. 2V
Figure 7. Operating supply current test circuit
27k
220 k
10 k 10 k
Icc A
15 V
1 .5 k
2W
2. 5V +
FB/ZCD ^-
C O MP
VDD
D R AI N
C U R R EN T
C ON TR OL
I R EF
GND SOURCE
15 0V
10
50 kH z
-5V
2 .8 V
5 .6
Note:
The circuit across the ZCD pin is used for switch-on synchronization
Figure 8. Quiescent current during fault test circuit
I q(f au lt ) A
14V
2. 5V +
FB/ZCD ^-
C OMP
VDD
D R AIN
C U R R EN T
C ON TR OL
IR EF
GND SOURCE
10/29
Doc ID 18211 Rev 2