AM80A-300L-120F18 Astec Power, AM80A-300L-120F18 Datasheet - Page 23

• Manufacturer Part Number: AM80A-300L-120F18
• Manufacturer: Astec Power

Parallel Connection Considerations
A master-slave configuration is not required for AMPSS
modules. AM80A modules may be connected in parallel
using a simple, single wire connection.
Current Sharing
In multi-module paralleled systems, all modules will share
current to within ± 3% (typical) of the rated
load current per module when the C SHARE pins of each
module are connected together.
The +SENSE and -SENSE pins of each module should be
connected to common points as close as possible to the
load.
Synchronization
Modules are synchronized by connecting the CLK OUT
pin of one module to the CLK IN pin of the next. Consecu-
tively connected modules operate out of phase with each
other, resulting in ripple cancellation at the inputs and
outputs of paralleled modules. If the clock input to a
module fails, it will automatically revert to its internal clock
and continue to operate normally.
Output Ripple and Noise
AM80A Performance Series modules are designed to
generate very low ripple and noise. When mounted on
logic boards, for example, sufficient decoupling is normally
provided by the components used to decouple the logic
ICs, and no additional decoupling is required.
CLKIN
Rev. 05 Mar 99
CSHARE
CLKOUT
CSHARE
6
7
6
7
12
12
1
1
+SENSE
-SENSE
+SENSE
-SENSE
+O/P
-O/P
N+O/P
-O/P
Load
TM
Conducted EMI
Although AMPSS modules contain both common mode
and differential mode input EMI filtering, power supply
systems using these modules will require additional EMI
filtering to enable the system to meet relevant EMI
standards.
AM80A modules have an effective input to ground
(baseplate) capacitance of 700pF for 300V input models
and 580pF for 48V input models. This should be
accounted for when calculating the maximum EMI ‘Y’
capacitance to meet ground leakage current specifications.
Break Regulation
AM80A Performance Series modules are designed to
deliver full rated output current at up to 0.5V above V
at the minimum specified input voltage.
Protective earth
%V
%V
+0.5V
+
-
+0.5V
Onom
Onom
120%
100%
120%
100%
80%
80%
AMPSS
36
180
V
V
I
I
(300V input modules)
(48V input modules)
®
210
42
Reference Manual
Baseplate
+I/P
-I/P
72
400
O nom
23