Control Section - Denon DRA-F107 Service Manual

4.4.2 Internal Voltage Reference
Parameter
Trimmed Reference Voltage
4.4.3

Control Section

Parameter
Oscillator Frequency
ICE2A0565/165/265/365/765I/765P2
ICE2A0565G/0565Z/180Z/280Z/380P2
Oscillator Frequency
ICE2B0565/165/265/365/765I/765P2
Reduced Osc. Frequency
ICE2A0565/165/265/365/765I/765P2
ICE2A0565G/0565Z/180Z/280Z/380P2
Reduced Osc. Frequency
ICE2B0565/165/265/365/765I/765P2
Frequency Ratio f /f
osc1 osc2
ICE2A0565/165/265/365/765I/765P2
ICE2A0565G/0565Z/180Z/280Z/380P2
Frequency Ratio f /f
osc3 osc4
ICE2B0565/165/265/365/765I/765P2
Max Duty Cycle
Min Duty Cycle
PWM-OP Gain
V Operating Range Min Level
FB
V Operating Range Max level
FB
Feedback Resistance
Soft-Start Resistance
Symbol Limit Values
min. typ.
V 6.37 6.50
REF
Symbol
min.
f 93
OSC1
f 62
OSC3
f -
OSC2
f -
OSC4
4.5
3.18
D 0.67
max
D 0
min
A 3.45
V
V 0.3
FBmin
V -
FBmax
R 3.0
FB
R 42
Soft-Start
50
DRA-F107 / DRA-F107DAB
Electrical Characteristics
Unit
max.
6.63 V
Limit Values Unit
typ. max.
100 107 kHz
67 72 kHz
21.5 - kHz
20 - kHz
4.65 4.9
3.35 3.53
0.72 0.77
- -
3.65 3.85
- - V
- 4.6 V
3.7 4.9 k
50 62 k
Test Condition
measured at pin FB
Test Condition
V = 4V
FB
V = 4V
FB
V = 1V
FB
V = 1V
FB
V < 0.3V
FB