HCPL3120000E AVAGO TECH, HCPL3120000E Datasheet - Page 23

• Manufacturer Part Number: HCPL3120000E
• Manufacturer: AVAGO TECH

Under Voltage Lockout
Feature.
HCPL-3120, HCPL-J312, and
HCNW3120)
The HCPL-3120 contains an
under voltage lockout (UVLO)
feature that is designed to protect
the IGBT under fault conditions
which cause the HCPL-3120
supply voltage (equivalent to the
Figure 34. Under Voltage Lock Out.
14
12
10
8
6
4
2
0
0
(V
CC
- V
EE
5
(Discussion applies to
(10.7, 0.1)
(10.7, 9.2)
) – SUPPLY VOLTAGE – V
10
(12.3, 0.1)
(12.3, 10.8)
15
20
fully-charged IGBT gate voltage)
to drop below a level necessary to
keep the IGBT in a low resistance
state. When the HCPL-3120
output is in the high state and the
supply voltage drops below the
HCPL-3120 V
(9.5 < V
coupler output will go into the
low state with a typical delay,
UVLO Turn Off Delay, of 0.6 s.
UVLO–
UVLO–
< 12.0) the opto-
threshold
23
When the HCPL-3120 output is in
the low state and the supply
voltage rises above the HCPL-
3120 V
V
output will go into the high state
(assumes LED is “ON”) with a
typical delay, UVLO Turn On
Delay of 0.8 s.
UVLO+
UVLO+
< 13.5) the optocoupler
threshold (11.0 <