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参数资料
| 型号： | ATH12 |
| 英文描述： | CHOKE,AXIAL,CONFORMAL,8.2uH, 5% INDUCTIVE TOL,155 IDC, |
| 中文描述： | 6甲，3.3 - V输入非隔离宽输出调节电源模块 |
| 文件页数： | 8/14页 |
| 文件大小： | 391K |
| 代理商： | ATH12 |
Application Notes
ATH Series of Wide-Output Adjust Power
Modules (3.3/5-V Input)
North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662
Output On/Off Inhibit
For applications requiring output voltage on/off control,
each series of the ATH family incorporates an output
Inhibit
control pin. The inhibit feature can be used wher-
ever there is a requirement for the output voltage from
the regulator to be turned off.
The power modules function normally when the
Inhibit
pin is left open-circuit, providing a regulated output
whenever a valid source voltage is connected to
V
in
with
respect to
GND
.
Figure 3-2 shows the typical application of the inhibit
function. Note the discrete transistor (Q
1
). The
Inhibit
control has its own internal pull-up to V
in
potential. The
input is not compatible with TTL logic devices. An open-
collector (or open-drain) discrete transistor is recommended
for control.
Turning Q
1
on applies a low voltage to the
Inhibit
control
pin and disables the output of the module. If Q
1
is then
turned off, the module will execute a soft-start power-up
sequence. A regulated output voltage is produced within
20 msec. Figure 3-3 shows the typical rise in both the
output voltage and input current, following the turn-off
of Q
1
. The turn off of Q
1
corresponds to the rise in the
waveform, Q
1
V
ds
. The waveforms were measured with
a 5-A load.
Figure 3-2
Figure 3-3
Vo (2V/Div)
Iin (2A/Div)
Q1Vds (5V/Div)
HORIZ SCALE: 10ms/Div
PTH05020W
ATH15T05-9S
V
IN
1
10
4
5
6
2
3
L
O
A
D
C
1,000 μF
+
C
330 μF
+
1 =Inhibit
GND
GND
V
OUT
9
V
o
Sense
8
Q
BSS138
R
SET
7
Remote Sense
The ATH10, ATH12/15, ATH18/22, and ATH26/30
products incorporate an output voltage sense pin,
V
o
Sense
. The
V
o
Sense
pin should be connected to
V
out
at the
load circuit (see data sheet standard application). A re-
mote sense improves the load regulation performance of
the module by allowing it to compensate for any ‘IR’ voltage
drop between itself and the load. An IR drop is caused by
the high output current flowing through the small
amount of pin and trace resistance. Use of the remote
sense is optional. If not used, the
V
o
Sense
pin can be left
open-circuit. An internal low-value resistor (15-
or
less) is connected between the
V
o
Sense
and
V
out
. This en-
sures the output voltage remains in regulation.
With the sense pin connected, the difference between
the voltage measured directly between the
V
out
and
GND
pins, and that measured from
V
o
Sense
to
GND
, is the
amount of IR drop being compensated by the regulator.
This should be limited to a maximum of 0.3 V.
Note: The remote sense feature is not designed to compensate
for the forward drop of non-linear or frequency dependent
components that may be placed in series with the converter
output. Examples include OR-ing diodes, filter inductors,
ferrite beads, and fuses. When these components are enclosed
by the remote sense connection they are effectively placed
inside the regulation control loop, which can adversely affect
the stability of the regulator.
Over-Temperature Protection
The ATH18/22 and ATH26/30 series of products have
over-temperature protection. These products have an
on-board temperature sensor that protects the module’s
internal circuitry against excessively high temperatures.
A rise in the internal temperature may be the result of a
drop in airflow, or a high ambient temperature. If the
internal temperature exceeds the OTP threshold, the
module’s
Inhibit
control is automatically pulled low. This
turns the output off. The output voltage will drop as the
external output capacitors are discharged by the load
circuit. The recovery is automatic, and begins with a
soft-start power up. It occurs when the the sensed tem-
perature decreases by about 10 °C below the trip point.
Note: The over-temperature protection is a last resort mecha-
nism to prevent thermal stress to the regulator. Operation at
or close to the thermal shutdown temperature is not recom-
mended and will reduce the long-term reliability of the module.
Always operate the regulator within the specified Safe Operating
Area (SOA) limits for the worst-case conditions of ambient
temperature and airflow.
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|---|---|
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ATH12K12-9 | 制造商:ASTEC 制造商全称:Astec America, Inc 功能描述:15Amps |
| ATH12K12-9J | 功能描述:DC/DC转换器 DC-DC 1OUT 1.2V-5.5V 12A 66W 10-Pin RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| ATH12K12-9JL | 功能描述:DC/DC转换器 DC-DC 1OUT 1.2V-5.5V 12A 66W 10-Pin RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| ATH12K12-9S | 制造商:ASTEC 制造商全称:Astec America, Inc 功能描述:15Amps |
| ATH12K12-9SJ | 功能描述:DC/DC转换器 DC-DC 1OUT 1.2V-5.5V 12A 66W 10-Pin SMT RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
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