MC34163, MC33163
http://onsemi.com
4
, OUTPUT SWITCH ON-OFF TIME ( s)t
on
-t μ
100
C
T
, OSCILLATOR TIMING CAPACITOR (nF)
0.1
10
1.0
1.0 10
off
Figure 2. Output Switch On−Off Time
versus Oscillator Timing Capacitor
Figure 3. Oscillator Frequency Change
versus Temperature
2.0
-55
T
A
, AMBIENT TEMPERATURE (°C)
f
OSC
, OSCILLATOR FREQUENCY CHANGE (%)Δ
0
-2.0
-4.0
-6.0
-25 0 25 50 75 100 125
1
2
3
4
5
V
CC
= 15 V
C
T
= 620 pF
V
CC
= 15 V
T
A
= 25°C
1)t
on
, R
DT
= ∞
2)t
on
, R
DT
= 20 k
3)t
on
, t
off
, R
DT
= 10 k
4)t
off
, R
DT
= 20 k
5)t
off
, R
DT
= ∞
Figure 4. Feedback Comparator 1 Input Bias
Current versus Temperature
2.8
2.4
2.0
1.6
1.2
-55 -25 0 25 50 75 100 125
T
A
, AMBIENT TEMPERATURE (°C)
I
source (DRV)
, BOOTSTRAP INPUT CURRENT SOURCE (mA)
V
CC
= 15 V
Pin 16 = V
CC
+ 5.0 V
V
Z
Figure 5. Feedback Comparator 2 Threshold
Voltage versus Temperature
7.6
7.4
7.2
7.0
6.8
-55 -25 0 25 50 75 100 12
T
A
, AMBIENT TEMPERATURE (°C)
I
Z
= 25 mA
, BOOTSTRAP INPUT ZENER CLAMP VOLTAGE (V)
Figure 6. Bootstrap Input Current
Source versus Temperature
Figure 7. Bootstrap Input Zener Clamp
Voltage versus Temperature
I
IB
, INPUT BIAS CURRENT (A)μ
140
-55
T
A
, AMBIENT TEMPERATURE (°C)
120
100
80
60
-25 0 25 50 75 100 125
V
th(FB2)
, COMPARATOR 2 THRESHOLD VOLTAGE (mV
1300
1280
1260
1240
1220
1200
-55
T
A
, AMBIENT TEMPERATURE (°C)
-25 0 25 50 75 100 125
V
th
Typ = 1250 mV
V
th
Min = 1225 mV
V
CC
= 15 V
V
FB1
= 5.05 V
V
th
Max = 1275 mV
V
CC
= 15 V
