Datasheet

UCC27423-Q1
GND
1
2
3
4
INB
INA
7
6
5
8
OUTA
VDD
OUTB
INPUT
CER
VDD
ENBB
ENBA
CLOAD
2.2 mF
1 mF
UCC27423-Q1
UCC27424-Q1
UCC27425-Q1
SGLS274F –SEPTEMBER 2008–REVISED SEPTEMBER 2012 www.ti.com
In a large majority of applications it is advantageous that the turn-off capability of a driver is stronger than the
turn-on capability. This helps to ensure that the MOSFET is held OFF during common power supply transients
which may turn the device back ON.
Parallel Outputs
The A and B drivers may be combined into a single driver by connecting the INA/INB inputs together and the
OUTA/OUTB outputs together. Then, a single signal can control the paralleled combination as shown in
Figure 31.
Figure 31. Parallel Outputs
Operational Waveforms and Circuit Layout
Figure 32 shows the circuit performance achievable with a single driver (half of the 8-pin IC) driving a 10-nF load.
The input pulse width (not shown) is set to 300 ns to show both transitions in the output waveform. Note the
linear rise and fall edges of the switching waveforms. This is due to the constant output current characteristic of
the driver as opposed to the resistive output impedance of traditional MOSFET-based gate drivers.
Figure 32. Pulse Response
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