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參數(shù)資料
| 型號： | BXA15 |
| 英文描述： | Design Note 100 Rev. 01 - Feb. 1999 |
| 中文描述： | 設(shè)計(jì)筆記100牧師01 - 1999年2月 |
| 文件頁數(shù)： | 3/4頁 |
| 文件大?。?/td> | 221K |
| 代理商： | BXA15 |
It is imperative to account for both the resistive and reactive compo-
nents of source impedance.
The input operating voltage range specified refers to the voltage
which must be maintained across the inputs pins, during all steady
state and transient conditions. Models without the internal filter
option will generally require a much lower reactive source imped-
ance than for those with the internal filter installed. This is because
the input current will have large harmonics at the DC/DC converter
switching frequency.
The reactive source impedance can be effectively reduced by
adding local film or ceramic capacitors. A recommended film
capacitor is ITW Paktron 20μF, 50 Volts Capstick or equivalent.
(ITW Paktron Part Number: 206K050CS4).
Local Decoupling of High Frequency Input Ripple Current:
This is particularly important for 12Vin models. Non filter versions
have a maximum input current of 5 Amps DC with 0.7A ACrms
superimposed. The AC current is almost sinusoidal and at 350 -
400kHz. The source impedance must be able to supply this current
with negligible voltage ripple. Adding the recommended film capac-
itor across the input pins will allow the high frequency input current
requirement to be locally sourced. This will also dramatically reduce
both input conducted noise and radiated noise.
Start-up Surge Consideration:
Depending on lead inductance and source impedance a higher
value, parallel, ‘reservoir’ electrolytic may be required to ensure ade-
quate input voltage is maintained during start-up and transients.
The start-up surge current is always well within ETSI limits but is still
significant and the source must be able to supply it with low
dropout. During this surge the input voltage should remain above
the minimum on threshold.
IR Steady State Voltage Drop Consideration:
Care must be taken with lead and connector resistances. The
source voltage should be a minimum of 9 Volts + R (total, leads +
connectors).
PAGE 3
Design Note 100 Rev. 01
|
BXA15 AND BXA30 SERIES
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BXA200 | Single output |
| BXA30 | 30W Wide Input DC/DC Converters |
| BXA3 | 3W Wide Input DC/DC Converters |
| BXA40-24S05 | Octal D-type latch non-inverting (3-state) with 5V tolerant inputs and outputs |
| BXA40-24S05M | Octal D-type flip flop non-inverting (3-state) with 5V tolerant inputs and outputs |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BXA15-12D12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| BXA15-12D12F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| BXA15-12S05 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| BXA15-12S05F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
| BXA15-12S12 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Analog IC |
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