NCP1392B_09 ONSEMI [ON Semiconductor], NCP1392B_09 Datasheet - Page 20

• Manufacturer Part Number: NCP1392B_09
• Description: High-Voltage Half-Bridge Driver with Inbuiltc Oscillator
• Manufacturer: ONSEMI [ON Semiconductor]

The High−Voltage Driver
high−voltage section. The device incorporates an upper
UVLO circuitry that makes sure enough V
depicted in block diagram. This logic is constructed in such
a way that the Mlower driver starts to pulse firs after any
driver restart. The bootstrap capacitor is thus charged during
first pulse. A delay is inserted in the lower rail to ensure good
Figure 40 shows the internal architecture of the
The A and B outputs are delivered by the internal logic, as
DEAD TIME
B
A
Figure 40. The Internal High−Voltage Section of the NCP1392
Trigger
Pulse
from latch
high if OK
Shifter
Level
from PFC
Delay
gs
is available for
B
A
http://onsemi.com
Detect
UV
20
S
R
Delay
the upper side MOSFET. The V
is provided by C
bootstrap diode.
matching between these propagating signals. As stated in the
maximum rating section, the floating portion can go up to
600 Vdc and makes the IC perfectly suitable for offline
applications featuring a 400 V PFC front−end stage.
Q
Q
boot
capacitor that is refilled by external
Boot
Hgd
HB
V
Lgd
GND
CC
CC
C
boot
for floating driver section
+
D
boot
V
aux
V
bulk