MC34152 Datasheet, PDF (8/10 Pages) ON Semiconductor – HIGH SPEED DUAL MOSFET DRIVERS

MC34152 MC33152
Figure 22. Controlled MOSFET Drive
Figure 23. Bipolar Transistor Drive
Vin
Rg(on)
Rg(off)
IB
+
Vin
0
–
Base
Charge
Removal
C1
In noise sensitive applications, both conducted and radiated EMI can
be reduced significantly by controlling the MOSFET’s turn–on and
turn–off times.
The totem–pole outputs can furnish negative base current for
enhanced transistor turn–off, with the addition of capacitor C1.
Figure 24. Dual Charge Pump Converter
VCC = 15V
47 0.1
+6
+
–
+
5.7V
2
VCC
2N3904
10k
4
330
100k
pF
7
6.8 10
+
1N5819
+
47
+ VO ≈ 2 .0VCC
5
6.8 10
+
1N5819
– VO ≈ –VCC
47 ₊
3
The capacitor’s equivalent series resistance limits the Drive Output Current to 1.5 A. An
additional series resistor may be required when using tantalum or other low ESR capacitors.
Output Load Regulation
IO (mA)
0
1.0
10
20
30
50
+VO (V)
27.7
27.4
26.4
25.5
24.6
22.6
–VO (V)
–13.3
–12.9
–11.9
–11.2
–10.5
–9.4
8
MOTOROLA ANALOG IC DEVICE DATA