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AZ494B_05 Datasheet, PDF (6/12 Pages) BCD Semiconductor Manufacturing Limited – PULSE-WIDTH-MODULATION CONTROL CIRCUITS
Data Sheet
PULSE-WIDTH-MODULATION CONTROL CIRCUITS
AZ494B/D
Electrical Characteristics (Continued)
Parameter
Symbol Conditions (Note 4)
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
45
%
=0.01µF, RT =12KΩ
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
VRT=VREF, All VCC = 15V
other inputs
outputs open
and
VCC = 36V
6 10 mA
9 15
Average Supply Current
VI (DEAD-TIME-CTRL) =2V
See Figure 4.
7.5
mA
Switching Characteristics
Rise Time
Fall Time
tr
Common-emitter Configuration
tf
See Figure 6
100 200 ns
25 100 ns
Rise Time
Fall Time
tr
Emitter-follower Configuration
tf
See Figure 7
100 200 ns
40 100 ns
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.
Jun. 2005 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
6