6 page
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
AZ494
Rev.1.0
6
March. 2003
Advanced Analog Circuits
Data Sheet
Parameter
Symbol Conditions
Min
Typ
Max
Unit
Output Control Input Current
VI = Vref
3.5
mA
Dead-Time Control Section
Input Bias Current
VI = 0 to 5.25V
-2
-10
µA
Maximum Duty Cycle,
Each Output
VI (DEAD-TIME CTRL) = 0, CT
=0.01
µF, RT =12KΩ
45
%
Input Threshold Voltage
Zero Duty Cycle
3
3.3
V
Maximum Duty Cycle
0
PWM Comparator Section (See Figure 4)
Input Threshold Voltage (FEEDBACK)
Zero duty cycle
4
4.5
V
Input Sink Current (FEEDBACK)
V(FEEDBACK) = 0.7V
0.3
0.7
mA
Total Device
Standby Supply Current
ISTDBY RT=Vref, All other
inputs and outputs
open
VCC = 15V
6
10
mA
VCC = 36V
9
15
Average Supply Current
VI (DEAD-TIME-CTRL) =2V
See Figure 4.
7.5
mA
Switching Characteristics
Rise Time
tr
Common-emitter Configuration
See Figure 6
100
200
ns
Fall Time
tf
25
100
ns
Rise Time
tr
Emitter-follower Configuration
See Figure 7
100
200
ns
Fall Time
tf
40
100
ns
Electrical Characteristics (Continued)
Note 4: For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating
conditions.
Note 5: Duration of the short circuit should not exceed one second.
Note 6: Standard deviation is a measure of the statistical distribution about the mean as derived from the formula:
Note 7: Temperature coefficient of timing capacitor and timing resistor are not taken into account.
