Rainbow Electronics DS1875 - Manual (Page 28)

DS1875
PON Triplexer and SFP Controller
28 ______________________________________________________________________________________
SW
CURRENT SINK
FB
COMP
DS1875
Figure 14. PWM Controller Current-Sink Output Configuration
SW
VOLTAGE OUTPUT
FB
COMP
DS1875
Figure 13. PWM Controller Voltage Output Configuration
COMP
D2
MON3
APD OVERLOAD QUICK TRIP
SW
FB
V IN
C1
Q1
C2
R2
R3
RMON
R4
L1
C
COMP R
COMP
D1 R1
V OUT
3.3V
C4
C3
TIA
ROSA
APD
DS1875
MAX4007
Figure 12. PWM Controller Typical APD Bias Circuit