lh2320-2 Power-One, lh2320-2 Datasheet - Page 18

• Manufacturer Part Number: lh2320-2
• Description: H Series Data Sheet 70 Watt Ac-dc Converters
• Manufacturer: Power-One

capacitance. Consequently, the working input voltage and the
threshold level V
input voltage V
remaining in the input capacitance.
Formula for threshold level for desired value of t
V
where as:
Table 17: Undervoltage monitor functions
V output (V2, V3):
Connector pin V is internally connected to the open collector of
a NPN transistor. The emitter is connected to the negative
potential of output 1. V
monitored voltage level (V
through the open collector should not exceed 50 mA. The NPN
output is not protected against external overvoltages. V
should not exceed 60 V.
Fig. 22
Output configuration of options V2 and V3
BCD20019 Rev AB
ti
(VME compatible)
1
2
Note: The threshold level V
the factory to a value according to table 17.
=
Threshold level adjustable by potentiometer (not recommended for mobile applications).
Fixed value between 95% and 98% of V
C
C
P
t
V
V
h
o
i min
t i
V
i min
i ext
V output
i
––––––––––––––––––––– + V
and V
V
2 • P
V
V2
V3
i
i
= minimum internal input capacitance [mF],
= external input capacitance [mF]
= output power [W]
= efficiency [%]
= hold-up time [ms]
= minimum input voltage [V]
= threshold level [V]
, V
or V
o1
o1
o
according to the table below
o1
• (t
status
i min
> V
< V
ti
C
h
t
should be adequately above the minimum
of the converter, so that enough energy is
+ 0.3 ms) • 100
i min
+ V
t
h
•
®
V
Monitoring
– 0.6 V (logic low) corresponds to a
yes
yes
V
i
ti
i
and/or V
of option V2 and V3 is adjusted in
high, H, I
low, L, V
11009a
V
yes
no
i min
o1
o1
V
V
V output, V
) < U
o1
Vo1+
V
Vo1–
- 0.6 V at I
- 25 µA at V
2
(tracking), output undervoltage monitoring is not a requirement of VME standard.
I
t
V
V
. The current I
V
V
V
Minimum adjustment range
h
i min
i min
:
V
V
R
of threshold level V
V
= 50 mA
p
– V
– V
V
= 5.1 V
ti
i max
i max
Page 18 of 21
1
1
V
V
Table 16: Available internal input capacitance and factory
potentiometer setting of V
Option V operates independently of the built-in input under-
voltage lockout circuit. A logic "low" signal is generated at pin 5
as soon as one of the monitored voltages drops below the pre-
selected threshold level V
(pin 23). The V output recovers, when the monitored voltage
exceeds V
potentiometer, accessible through a hole in the front cover, or
adjusted in the factory to a determined customer-specific
value.
Versions V2 and V3 are available as shown below.
Threshold tolerances and hysteresis:
V
this voltage differs from the voltage at the connector pins by the
voltage drop V
level of option V0 is factory-adjusted at I
Fig. 23
Definition of V
i
0.95 – 0.98 V
is monitored after the input filter and rectifier. Consequently,
t
V
V
V high
V low
V
Type
C
–
to
V
i min
t
t
h
t i
+ V
V
V
o1
ti
h
, V
. The threshold level V
2
t i
across input filter and rectifier. The threshold
ti
Typical hysteresis V
and V
70 Watt AC-DC Converters
V
ti
t i
3.0 – 0.5
3.0 – 0.5
t
hi
. The return for this signal is Vo1–
for V
with resulting hold-up time
0.14
V
LH
85
V
5
hi
ti
H Series Data Sheet
t min
– V
t
V
is either adjustable by a
t max
hi
h
o nom
www.power-one.com
[% of V
and T
t
]
VDC
Unit
V
"0"
mF
ms
A
-
ho
= 25 °C.
11023a
V
i