Denon DRA-F107 Service Manual page 35

4.3.2 PWM Section
Parameter
Regulation Pull-Up Resistor
PWM-OP Gain
Offset for Voltage Ramp
Soft-Start time
Zero crossing threshold voltage V
Ringing suppression threshold
Minimum ringing suppression
time
Maximum ringing suppression
time
Threshold to set Up/Down
Counter to one
Threshold for downward
counting
Threshold for upward counting
1)
Counter time
Maximum restart time in normal
operation
Leading Edge Blanking
Peak current limitation in normal
operation
Regulation voltage for entering
Burst Mode
Regulation voltage for leaving
Burst Mode
Regulation voltage for burst-on
Regulation voltage for burst-off
Fixed Switching Frequency in
Burst Mode
Max. Duty Cycle in Burst Mode
Peak Current Limitation in Burst
Mode
1) The parameter is not subject to production test - verified by design/characterization
Symbol Limit Values
min. typ.
R 14 23
REG
3.18 3.3
A
V
V 0.63 0.7
OS
t 18 21
SOFTS
20 50
ZCT1
V 0.7
ZCT2
t 2.2 4.2
ZCRST1
t - 42
ZCRST2
V 3.9
RM
V 3.2
RH
V 2.5
RL
t 48
COUNT
t 33 42
sMax
t 200 330
LEB
V 0.95 1.0
csth
V 1.1
EB
V 4.5
LB
V 3.6
BH
V 3.0
BL
f 64 80
sB
D 0.5
maxB
V 0.22 0.25
csB
35
DRA-F107 / DRA-F107DAB
Electrical Characteristics
Unit Test Condition
max.
33 k
- -
- V
38 ms
110 mV
V
5.5 s V > V
ZC
- s V < V
ZC
V
V
V
ms
60 s V <V
ZC
460 ns
1.05 V
V
V
V
V
96 kHz
0.3 V
ZCT2
ZCT2
ZCT1