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参数资料
| 型号： | KW025A0Y41-BZ |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT |
| 文件页数： | 6/24页 |
| 文件大小： | 2376K |
| 代理商： | KW025A0Y41-BZ |
Preliminary Data Sheet
March 24, 2006
KW010/015/020/025 Series Power Modules:
36 – 75Vdc Input; 1.0 to 5.0Vdc Output; 10 to 25A Output current
Tyco Electronics Power Systems
14
Feature Descriptions (continued)
ΚΩ
=
22
.
10
8
511
down
trim
R
current-limiting circuitry and can endure current
limiting continuously. At the point of current-limit
inception, the unit enters hiccup mode. If the unit is
not configured with auto–restart, then it will latch off
following the over current condition. The module can
be restarted by cycling the dc input power for at least
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; it
operates normally, once the output current is brought
back into its specified range. The average output
current during hiccup is 10% I
ΚΩ
=
655
.
53
down
trim
R
Connecting an external resistor (Rtrim-up) between the
TRIM pin and the VO(+) (or Sense (+)) pin increases
the output voltage set point. The following equations
determine the required external resistor value to
obtain a percentage output voltage change of Δ%:
For output voltage: 1.5V to 12V
ΚΩ
Δ
Δ
×
Δ
+
×
=
22
.
10
%
511
%
225
.
1
%)
100
(
11
.
5
, set
o
up
trim
V
R
O, max.
For output voltage: 1.2V
ΚΩ
Δ
Δ
×
Δ
+
×
=
22
.
10
%
511
%
6
.
0
%)
100
(
11
.
5
, set
o
up
trim
V
R
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
100
%
,
×
=
Δ
set
o
set
o
desired
V
Where
(+) pin or the V (-) pin.
O
For example, to trim-up the output voltage of 1.2V
module (KW025A0P/P1) by 5% to 1.26V, R
VO(+)
VOTRIM
VO(-)
Rtrim-down
LOAD
VIN(+)
ON/OFF
VIN(-)
Rtrim-up
trim-up is
calculated is as follows:
5
%
=
Δ
ΚΩ
×
+
×
=
22
.
10
5
511
5
6
.
0
)
5
100
(
2
.
1
11
.
5
up
trim
R
ΚΩ
=
2
.
102
up
trim
R
Alternative voltage programming for output
voltage: 1.2V (-V Option)
An alternative set of trimming equations is available
as an option for 1.2V output modules, by ordering the
–V option. These equations will reduce the resistance
of the external programming resistor, making the
impedance into the module trim pin lower for
applications in high electrical noise applications.
Figure 42. Circuit Configuration to Trim Output
Voltage.
Connecting an external resistor (Rtrim-down) between
the TRIM pin and the Vo(-) (or Sense(-)) pin
decreases the output voltage set point. To maintain
set point accuracy, the trim resistor tolerance should
be ±1.0%.
ΚΩ
Δ
=
2
%
100
down
trim
R
ΚΩ
Δ
=
%
100
up
trim
R
The following equation determines the required
external resistor value to obtain a percentage output
voltage change of Δ%
100
%
,
×
=
Δ
set
o
set
o
desired
V
Where
For output voltage: 1.2V to 12V
ΚΩ
Δ
=
22
.
10
%
511
down
trim
R
For example, to trim-up the output voltage of 1.2V
module (KW025A0P/P1-V) by 5% to 1.26V, Rtrim-up is
calculated is as follows:
100
%
,
×
=
Δ
set
o
desired
set
o
V
Where
5
%
=
Δ
ΚΩ
=
5
100
up
trim
R
For example, to trim-down the output voltage of 2.5V
module (KW020A0G/G1) by 8% to 2.3V, Rtrim-down
is calculated as follows:
ΚΩ
=
0
.
20
up
trim
R
The value of the external trim resistor for the optional
–V 1.2V module is only 20% of the value required with
the standard trim equations.
8
%
=
Δ
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