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AME28461 Series
AME28461 Block Diagram
Refer to last page for Pin Designation
Circuit Operation and Application Information
The AME series of filters employ three stages of fil-
tering in a low pass configuration designed to at-
tenuate the higher frequency components of ripple
currents generated by high frequency switching DC/
DC converters. The Block Diagram describes the
general arrangement of the principal elements which
have been connected to provide both differential and
normal mode buffering between the input and out-
put terminals.
When a single AME filter is used in conjunction with
multiple DC/DC converters, the use will be limited to
the maximum output current capability specified in
the AME electrical table.
1
A typical connection utiliz-
ing one filter to drive two converters is illustrated on
page 1.
1
To calculate the input current (iin) requirement of any one converter, first determine the maximum output power by
multiplying output voltage by maximum load current, divide this power by the efficiency to obtain input power and then divide
input power by input voltage to obtain the input current (iin). Note that to obtain worst case input current, you must use
maximum load current, minimum efficiency and minimum line voltage in this calculation.
7
12
1
6
22 μF
11 μF
20 nF
20 nF
Case
Output
Output
Return
Input
Input
Return
2
3
5
4
11
10
8
9
Employing only passive elements, AME filter opera-
tion is initiated simply by insertion into the input power
path between one or more DC/DC converters and
their input DC voltage bus. In this connection, out-
put pins of the filter will be connected to input pins of
the converters.
Although expressly designed to complement the AFL
series of DC/DC converters, when operated within
their specified limits the AME filters can be success-
fully operated in conjunction with other converters
in the Advanced Analog line including the ASA, AHF,
AHV and ATR series.