PSK1212-9 POWER ONE, PSK1212-9 Datasheet - Page 10

• Manufacturer Part Number: PSK1212-9
• Manufacturer: POWER ONE
• Type: Step Downr

Specifications of PSK1212-9

• Output Current: 12A
• Input Voltage: 18 to 144V
• Output Voltage: 12V
• Number Of Outputs: 1
• Output Power: 144
• Screening Level: Commercial
• Operating Temperature Min Deg. C: -40C
• Operating Temperature Max Deg. C: 71C
• Product Length (mm): 168.5mm
• Product Depth (mm): 111mm
• Product Height (mm): 80mm
• Mounting Style: Screw
• Pin Count: 15
• Lead Free Status / Rohs Status: Not Compliant

Thermal Considerations and Protection
When a switching regulator is located in free, quasi-stationary
air (convection cooling) at a temperature T
at its nominal output current I
can rise over T
at the measuring point of case temperature; see Mechanical
Data.
Under practical operating conditions, the ambient temperature
T
Table 5: Inhibit characteristics
Fig. 4a
Output current derating versus temperature (models -2)
Auxiliary Functions
Inhibit (Remote On / Off)
The inhibit input allows to enable or disable the output with a
control signal. In systems with several regulations, this feature
can be used to control the activation sequence of the
regulators by a logic signal (TTL, C-MOS, etc.). An output
voltage overshoot will not occur, when switching on or off.
The inhibit signal is referenced to the S– (pin 18). The signal i
and the switching times are specified in table 5, fig. 5, and fig.
6.
BCD20029-G Rev AA, 28-Apr-09
Characteristics
V
t
t
I
A
i inh
r
f
Note: With open i input, the output is enabled.
inh
may exceed T
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
I
Inhibit input voltage V
Switch-on time
Switch-off time
Input current when inhibited V
o
0
/I
o nom
T
A min
convection cooling
C max
40
A max
after the warm-up phase. T
, provided that additional measures (heat
V
®
50
o
o
= on V
= off
o nom
T
V
R
Conditions
60
C min
i min
i
i
L
= V
= V
= V
, the case temperature T
– V
o nom
i nom
i nom
–T
forced
cooling
i max
C max
70
/I
o nom
A max
05032a
+2.4
min typ max Unit
–50
and is operated
80 °C
C
is measured
130
25
25
T
C max
+0.8
+50
T
A
Page 10 of 20
mA
C
ms
V
sink, forced cooling, etc.) are taken to ensure that the case
temperature T
The regulater is protected by an internal temperature sensor,
which
automatically recovers, when the temperature drops below
T
Fig. 4b
Output current derating versus temperature (models -7 or -9).
Fig. 5
Specification of the inhibit signal (typical)
C max
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
I
o
I
0
/I
inh
5
4
3
2
1
0
.
o nom
Fig. 6
Output response as a function of the inhibit signal
T
[mA]
A min
inhibits
–40
0.1
Output on
o
Inhibit
1
0
1
0
C
/
Positive Switching Regulators
50
convection cooling
does not exceed its maximum value.
o nom
the
PSS, PSK Series Data Sheet
–20
60
output
r
70
0
above
80
20
forced
cooling
06001
T
05031a
Output off
C max
90
www.power-one.com
. The
40
06034a
f
°C
T
C max
V
T
A
V
output
inh