CURRENT MODE PWM CONTROLLER

AP384XC

Data Sheet

8

Sep. 2006 Rev. 1. 1

BCD Semiconductor Manufacturing Limited

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.

Figure 7. Reference Voltage vs. Ambient Temperature

Typical Performance Characteristics

Figure 5. Oscillator Dead Time vs. Timing Capacitor

Figure 6. Timing Resistor vs. Frequency

ELectrical Characteristics (Continued)

Figure 8. Output Saturation Characteristics

-40

-20

0

20

40

60

80

100

120

4.980

4.985

4.990

4.995

5.000

5.005

5.010

5.015

V

CC

=15V, I

O

=1mA

Ambient Temperature (

0

50

100

150

200

250

300

350

400

450

500

550

600

-0.5

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

V

CC

=15V, T

A

=25

Output Sink Current (mA)