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參數(shù)資料
| 型號(hào)： | ATH30T033 |
| 英文描述： | CONNECTOR,IDC SOCKET,14 CONT 1A DOUBLE ROW |
| 中文描述： | 30甲，3.3 - 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> | 389K |
| 代理商： | ATH30T033 |
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
Pre-Bias Startup Capability
Only selected products in the ATH family incorporate this
capability. Consult Table 3-1 to identify which products
are compliant.
A pre-bias startup condition occurs as a result of an external
voltage being present at the output of a power module prior
to its output becoming active. This often occurs in com-
plex digital systems when current from another power
source is backfed 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. A prebias 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.
The ATH family of power modules incorporate synchro-
nous rectifiers, but 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
demonstrating the pre-bias startup capability. The start-
up waveforms are shown in Figure 3-10. Note that the
output current from the ATH15T033 (I
o
) shows negligible
current until its output voltage rises above that backfed
through diodes D
1
and D
2
.
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
one of two approaches must be followed when input power is
applied to the module. 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
.
V
o
= 2.5 V
V
IN
= 3.3 V
R
2
2k21
ASIC
VCORE
VCCIO
I
o
PTH03010W
1
10
4
5
6
2
3
9
8
Track
V
IN
V
O
GND
Inhibit
7
Vadj
Sense
+
C
IN
330 μF
+
C
OUT
330 μF
+
Figure 3–9; Application Circuit Demonstrating Pre-Bias Startup
Vin (1 V/Div)
Vo (1 V/Div)
Io (5 A/Div)
HORIZ SCALE: 5 ms/Div
Figure 3–10; Pre-Bias Startup Waveforms
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ATH30 | 30Amps |
| ATH30T033-9 | 30Amps |
| ATH30T033-9J | 30Amps |
| ATH30T033-9S | 30Amps |
| ATH30T033-9SJ | 30Amps |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ATH30T033-9 | 制造商:ASTEC 制造商全稱:Astec America, Inc 功能描述:30Amps |
| ATH30T033-9J | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 0.8V-2.5V 30A 143W 13-Pin 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: |
| ATH30T033-9JL | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 0.8V-2.5V 30A 143W 13-Pin 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: |
| ATH30T033-9S | 制造商:ASTEC 制造商全稱:Astec America, Inc 功能描述:30-A, 3.3-V Input Non-Isolated Wide-Output Adjust Power Module |
| ATH30T033-9SJ | 功能描述:DC/DC轉(zhuǎn)換器 DC-DC 1OUT 0.8V-2.5V 30A 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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