MIC38HC42 Datasheet, PDF (6/8 Pages) Micrel Semiconductor – BiCMOS 1A Current-Mode PWM Controllers

MIC38HC42/3/4/5
Typical Characteristics
Oscillator Frequency
Configuration
100
200pF
470pF
1nF
1.8nF
10
4.7nF
10nF
V_DD = 15V
1
1x10⁴
1x10⁵
1x10⁶
OSCILLATOR FREQUENCY (Hz)
Current Sense Amplifier
vs. Error Amplifier Output
1.2
1.0
125°C
0.8
0.6
25°C
0.4
-50°C
0.2
0.0
0
2
4
6
8
ERROR AMPLIFIER OUTPUT (V)
MIC38C/HC42/43 Output Dead
Time vs. Oscillator Frequency
100
V_DD = 15V
4.7nF
10
10nF
200pF
470pF
1nF
1
1x10⁴
18nF
1x10⁵
FREQUENCY (Hz)
1x10⁶
Short-Circuit Reference
Current vs. Temperature
120
100
80
60
40
20 V_DD = 15V
0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
Micrel, Inc.
Oscillator Discharge
Current vs. Temperature
9.0
8.8
8.6
8.4
8.2
8.0
7.8
7.6
7.4
V_DD = 15V
7.2
V_OSC = 2V
7.0
-60 -30 0 30 60 90 120 150
TEMPERATURE (°C)
MIC38C4x
Output Waveform
25
20
15
10
5
0
-5 _{VD = 15V}
-10 _{CL = 1nF}
-15
0.0 0.2 0.4 0.6 0.8 1.0
TIME (µs)
M9999-042205
6
April 2005