PA13 View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'PA13' PDF : 7 Pages View PDF
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.
CAPACITIVE LOAD
INDUCTIVE LOAD
±VS
ILIM = 5A
ILIM = 10A
ILIM = 5A
ILIM = 10A
50V
200µF
40V
500µF
35V
2.0mF
30V
7.0mF
25V
25mF
20V
60mF
15V
150mF
125µF
350µF
850µF
2.5mF
10mF
20mF
60mF
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:
SHORT TO ±VS
SHORT TO
±VS C, L, OR EMF LOAD COMMON
45V
.43A
40V
.65A
35V
1.0A
30V
1.7A
25V
2.7A
20V
3.4A
15V
4.5A
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 Precision Power 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.
6
PA13U
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