PA13(2008) データシートの表示（PDF） - Cirrus Logic
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PA13 Datasheet PDF : 7 Pages
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PA13 • PA13A
Product Innovation From
1. Capacitive and dynamic* inductive loads up to the following maximum are safe with the current limits set as
specified.
±VS
50V
40V
35V
30V
25V
20V
15V
CAPACITIVE LOAD
ILIM = 5A
ILIM = 10A
200µF
500µF
2.0mF
7.0mF
25mF
60mF
150mF
125µF
350µF
850µF
2.5mF
10mF
20mF
60mF
INDUCTIVE LOAD
ILIM = 5A
ILIM = 10A
5mH
15mH
50mH
150mH
500mH
1,000mH
2,500mH
2.0mH
3.0mH
5.0mH
10mH
20mH
30mH
50mH
*If the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 12.5V be-
low the supply rail with ILIM = 10A or 27V below the supply rail with ILIM = 5A while the amplifier is current limiting,
the inductor must be capacitively coupled or the current limit must be lowered to meet SOA criteria.
2. The amplifier can handle any EMF generating or reactive load and short circuits to the supply rail or common if
the current limits are set as follows at TC = 25°C:
±VS
45V
40V
35V
30V
25V
20V
15V
SHORT TO ±VS
C, L, OR EMF LOAD
.43A
.65A
1.0A
1.7A
2.7A
3.4A
4.5A
SHORT TO
COMMON
3.0A
3.4A
3.9A
4.5A
5.4A
6.7A
9.0A
These simplified limits may be exceeded with further analysis using the operating conditions for a specific applica-
tion.
CURRENT LIMITING
Refer to Application Note 9, "Current Limiting", for details of both fixed and foldover current limit operation. Visit the
Apex web site at www.cirrus.com for a copy of Power_design.exe which plots current limits vs. steady state SOA.
Beware that current limit should be thought of as a ±20% function initially and varies about 2:1 over the range of
–55°C to 125°C.
For fixed current limit, leave pin 4 open and use equations 1 and 2.
RCL =
0.65
ICL
(1)
ICL =
0.65
RCL
(2)
Where:
ICL is the current limit in amperes.
RCL is the current limit resistor in ohms.
PA13U
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