Data Sheet
August 29, 2011
EHHD006A0B Series Eighth-Brick Power Modules
18 - 75Vdc Input; 12V/6A
dc
Output
Where
%
½
V
desired
12 . 0
100
12 . 0
For example, to trim-up the output voltage of the
module by 4% to 12.48V, R
trim-up
is calculated is as
follows:
%
½
4
5 . 11
12 . 0
(100
4 ) 511
10 . 22
R
trim
up
½
1 . 225
4
4
one second or by toggling the remote On/Off signal
for at least one second.
If the unit is configured with the auto-restart option (4),
it will remain in the hiccup mode as long as the
overcurrent condition exists. Once the output current
is brought back into its specified range, the unit will
operate normally. The average output current during
hiccup is 10% I
O, max
.
Output Voltage Programming
Trimming allows the output voltage set point to be
increased or decreased from the default value. This is
accomplished by connecting an external resistor
between the TRIM pin and either the V
O
(+) pin or the
V
O
(-) pin.
V
IN
(+)
V
O
(+)
R
trim-up
ON/OFF
V
O
TRIM
R
trim-down
V
IN
(-)
V
O
(-)
LOAD
R
trim
up
½
1.16
M
The voltage between the V
O
(+) and V
O
(–) terminals
must not exceed the minimum output overvoltage
protection value shown in the Feature Specifications
table. This limit includes any increase in voltage due
to remote-sense compensation and output voltage
set-point adjustment trim.
Although the output voltage can be increased by both
the remote sense and by the trim, the maximum
increase for the output voltage is not the sum of both.
The maximum increase is the larger of either the
remote sense or the trim. The amount of power
delivered by the module is defined as the voltage at
the output terminals multiplied by the output current.
When using remote sense and trim, the output
voltage of the module can be increased, which at the
same output current would increase the power output
of the module. Care should be taken to ensure that
the maximum output power of the module remains at
or below the maximum rated power (maximum rated
power = V
O,set
x I
O,max
).
Figure 12. Circuit Configuration to Trim Output
Voltage.
Connecting an external resistor (R
trim-down
) between
the TRIM pin and the V
O
(-) (or Sense(-)) pin
decreases the output voltage set point. To maintain
set point accuracy, the trim resistor tolerance should
be ±1.0%.
The following equation determines the required
external resistor value to obtain a percentage output
voltage change of
Δ%
511
R
trim
down
½
10 . 22
%
Where
%
½
12 . 0
V
V
desired
100
12 . 0
V
For example, to trim-down the output voltage of the
module by 6% to 11.28V, Rtrim-down is calculated as
follows:
%
½
6
511
R
trim
down
½
10 .22
6
R
trim
down
½
74 . 9
Connecting an external resistor (R
trim-up
) between the
TRIM pin and the V
O
(+) (or Sense (+)) pin increases
the output voltage set point. The following equation
determines the required external resistor value to
obtain a percentage output voltage change of
Δ%:
5.11
12 .0
(100
%) 511
R
trim
up
½
10 .22
1.225
%
%
LINEAGE
POWER
8
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
