MC33023 Motorola, MC33023 Datasheet - Page 12

• Manufacturer Part Number: MC33023
• Description: High Speed Single-Ended PWM Controller
• Manufacturer: Motorola

resistor from V ref to C T . See text on Oscillator section for more
information.
12
Additional dead time can be added by the addition of a dead time
R T
R DT
Figure 26. Dead Time Addition
V ref
C T
4
5
6
Oscillator
Master
Reference
Figure 28. Current Mode Master/Slave Operation Over Short Distances
Oscillator
Oscillator
Figure 29. Synchronization Over Long Distances
16
4
5
6
Master
C T
2200
R T
MC34023 MC33023
430
4
5
6
C T
1.0 k
4.7 k
20
MMBT3904
R T
MMBT3906
MMBD0914
need to be set 10% slower than the sync frequency. This circuit is also
used in Voltage Mode operation for master/slave operation. The clock
signal would be coming from the master which is set at the desired
operating frequency, while the slave is set 10% slower.
V ref
The sync pulse fed into the clock pin must be at least 3.9 V. R T and C T
5.0 V
Figure 27. External Clock Synchronization
4
5
6
0 V
C T
1.15 R T
R T
NC
Oscillator
MOTOROLA ANALOG IC DEVICE DATA
Slave
4
5
6
C T
4
5
6
Oscillator
Slave
Oscillator