Data Sheet
CURRENT MODE PWM CONTROLLER
ELectrical Characteristics (Continued)
Figure 4 is the basic test circuit for AP384XC. In testing, the high peak currents associated with capacitive loads
necessitate careful grounding techniques. Timing and bypass capacitors should be connected close to pin 5 in a
single point ground. The transistor and 5k potentiometer are used to sample the oscillator waveform and apply an
adjustable ramp to pin 3.
AP384XC
Typical Performance Characteristics
Figure 5. Oscillator Dead Time vs. Timing Capacitor
Figure 6. Timing Resistor vs. Frequency
5.015
5.010
V
CC
=15V, I
O
=1mA
4.0
3.5
V
CC
=15V, T
A
=25 C
o
Saturation Voltage (V)
-20
0
20
40
60
80
o
Reference Voltage (V)
5.005
3.0
2.5
2.0
1.5
1.0
0.5
5.000
4.995
4.990
4.985
0.0
4.980
-40
-0.5
100
120
0
50
100
150
200
250
300
350
400
450
500
550
600
Ambient Temperature ( C)
Output Sink Current (mA)
Figure 7. Reference Voltage vs. Ambient Temperature
Figure 8. Output Saturation Characteristics
Sep. 2006 Rev. 1. 1
BCD Semiconductor Manufacturing Limited
8
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
