KW010A0F41-SR Lineage Power, KW010A0F41-SR Datasheet - Page 9

• Manufacturer Part Number: KW010A0F41-SR
• Description: DC/DC Converters & Regulators SMT 10A, IN 48V OUT 3.3V NEG
• Manufacturer: Lineage Power
• Type: Step Downr

Specifications of KW010A0F41-SR

• Output Power: 33W
• Output Current: 10A
• Input Voltage: 48V
• Output Voltage: 3.3V
• Screening Level: Industrial
• Product Length (mm): 22.9mm
• Product Depth (mm): 33mm
• Mounting Style: Surface Mount
• Pin Count: 8
• Number Of Outputs: 1
• Package / Case: 1/16-Brick
• Lead Free Status / RoHS Status: Not Compliant

Data Sheet
September 9, 2008
Feature Descriptions
OVP pull-down circuit is required. The OVP pull-down
circuit will also provide significantly lower peak output
over-voltages for applications that are particularly
sensitive to over-voltage stress. Please contact your
local Lineage Power sales representative for further
information on the external OVP pull-down circuit.
Over-Current Protection
To provide protection in a fault (output overload)
condition, the unit is equipped with internal
current-limiting circuitry and can endure current limiting
continuously. At the point of current-limit inception, the
unit enters hiccup mode. The unit will remain in the
hiccup mode as long as the overcurrent
condition exists; it operates normally, once the output
current is brought back into its specified range. The
average output current during hiccup is < 1A.
Output Voltage Programming
Trimming allows the output voltage set point to be
increased or decreased. This is accomplished by
connecting an external resistor between the TRIM pin
and either the V
Figure 18. Circuit Configuration to Trim Output
Voltage.
Connecting an external resistor (R
TRIM pin and the V
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%
For trimming the output voltage lower:
Where
For example, to trim-down the output voltage of 3.3V
module (KW010A0F/F1) by 8% to 3.036V, R
calculated as follows:
LINEAGE
V
ON/OFF
V
Δ
IN
IN
%
(+)
(-)
POWER
=
R
trim
⎛
⎜
⎜
⎝
V
O
V
(+) pin or the V
o
−
O
,
down
set
V
TRIM
V
O
O
V
O
(-) (or Sense(-)) pin decreases the
(+)
−
(-)
o
,
=
V
set
Δ
desired
⎡
⎢ ⎣
% =
511
Δ
%
⎞
⎟
⎟
⎠
8
(continued)
−
×
O
10
100
(-) pin.
36 – 75Vdc Input; 3.3 to 5.0Vdc Output; 6 to 10A Output Current
trim-down
.
22
⎤
⎥ ⎦
R
R
ΚΩ
trim-up
trim-down
) between the
trim-down
LOAD
is
Connecting an external resistor (R
TRIM pin and the V
the output voltage set point. The following equations
determine the required external resistor value to obtain
a percentage output voltage change of Δ%:
For trimming the output voltage higher:
Where
For example, to trim-up the output voltage of 3.3V
module (KW010A0F/F1) by 6% to 3.498V, R
calculated is as follows:
The voltage between the V
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
I
o,max
R
R
trim
trim
).
−
up
−
up
Δ
KW0006-010 Series Power Modules:
=
R
%
=
trim
⎡
⎢
⎣
. 5
⎡
⎢ ⎣
=
−
. 5
11
⎛
⎜
⎜
⎝
down
11
V
R
×
o
trim
V
,
×
R
. 1
set
=
. 1
O
o
trim
3
, set
225
V
−
(+) (or Sense (+)) pin increases
⎡
⎢ ⎣
3 .
225
−
down
o
511
,
−
V
set
×
×
8
Δ
up
×
desired
(
(
×
% =
100
Δ
100
=
−
=
O
6
%
147
10
(+) and V
53
+
+
.
⎞
⎟
⎟
⎠
6
22
.
Δ
655
×
8 .
) 6
%)
100
⎤
⎥ ⎦
ΚΩ
trim-up
ΚΩ
−
ΚΩ
−
511
O
6
Δ
511
(–) terminals
) between the
%
−
−
10
10
trim-up
.
22
.
22
⎤
⎥ ⎦
ΚΩ
⎤
⎥
⎦
is
o,set
ΚΩ
9
x