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參數(shù)資料
| 型號： | ATH26K12-9S |
| 英文描述： | CONNECTOR,IDC SOCKET,10 CONTS, 1A,DOUBLE ROW |
| 中文描述： | 26甲，12 V輸入非隔離寬輸出調(diào)節(jié)電源模塊 |
| 文件頁數(shù)： | 13/16頁 |
| 文件大?。?/td> | 1306K |
| 代理商： | ATH26K12-9S |
Application Notes
ATH26K12 Wide-Output Adjust
Power Module (12-V Input)
North America (USA): 1-888-41-ASTEC Europe (UK): 44(1384)842-211 Asia (HK): 852-2437-9662
Pre-Bias Startup Capability
The ATH26K12 power module is capable of safely pow-
ering up while a voltage is applied to its output from an
external source.
A pre-bias startup condition can occur in complex digital
systems when current from another power source backfeeds
through a dual-supply logic component, such as an FPGA
or ASIC. Another path might be via clamp diodes as part
of a dual-supply power-up sequencing arrangement. The
prebias condition can cause problems with power modules
that incorporate synchronous rectifiers. This is because
under most operating conditions, these types of modules
can sink as well as source output current.
Although the ATH26K12 power module incorporates syn-
chronous rectifiers it will not sink current during
startup
1
, or whenever the
Inhibit
pin is held low. However,
to ensure satisfactory operation of this function, certain
conditions must be maintained.
2
Figure 3-9 shows an
application circuit that applies an external bias voltage
to a ATH26K12 during startup. The supply voltage
superviser, U
1
, holds the output of the module off via its
Inhibit pin until the voltage, V
1
(3.3 V), has first been
applied to the ASIC. As V
1
rises, some of the voltage
appears at the module’s output. The start-up waveforms
are shown in Figure 3-10. Note that the output current
from the ATH26K12 (I
2
) shows no negative current until
it raises the output voltage to full regulation (2.5 V).
Note: The pre-bias start-up feature is not compatible with
Auto-Track
. When the module is under Auto-Track
control, it will sink current if the output voltage is below
that of a back-feeding source. To ensure a pre-bias hold-off the
Auto-Track
function must either be disabled
3
, or the module’s
output held off (for at least 50 ms) using the Inhibit pin. Either
approach ensures that the Track pin voltage is above the set-
point voltage at start up.
Notes
1. Startup includes the short delay (approx. 10 ms)
prior to the output voltage rising, followed by the
rise of the output voltage under the module’s
internal soft-start control. Startup is complete
when the output voltage has risen to either the set-
point voltage or the voltage at the
Track
pin,
whichever is lowest.
2. To ensure that the regulator does not sink current
when power is first applied (even with a ground
signal applied to the
Inhibit
control pin), the input
voltage must always be greater than the output
voltage throughout the power-up and power-down
sequence.
3. The Auto-Track function can be disabled at
power up by immediately applying a voltage to the
module’s
Track
pin that is greater than its set-point
voltage. This can be easily accomplished by
connecting the
Track
pin to V
in
.
Figure 3–9; Application Circuit Demonstrating Pre-Bias Startup
Figure 3–10; Pre-Bias Startup Waveforms
V (1 V/Div)
V (1 V/Div)
I (5 A/Div)
HORIZ SCALE: 5 ms/Div
V
2
= 2.5 V
V
1
= 3.3 V
R
1
4k32
ASIC
VCORE
VCCIO
I
2
PTH12030W
ATH26K12-9S
1, 3, 7
13
6
8, 9
2
4
12
11
5
GND
Inhibit
Adjust
V
O
V
IN
Margin
Up
Margin
Down
Track
Sense
10
GND
C
330 μF
C
330 μF
V
IN
= 12 V
0 V
C
0.1 μF
U
TPS3838K33
2
4
5
1
3
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| ATH26K12-9SJ | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 1.2V-5.5V 26A 143W 13-Pin SMT RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| ATH26K12-9SJL | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 1.2V-5.5V 26A 143W 13-Pin SMT RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
| ATH26K12-9SL | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 1.2V-5.5V 26A 143W 13-Pin SMT RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸: |
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| ATH3000-15JC | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:UV-Erasable/OTP PLD |
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