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參數(shù)資料
| 型號(hào)： | AFL27005D |
| 英文描述： | Hi-Rel DC-DC Standard Dual Converter in a AFL package |
| 中文描述： | 高可靠性的DC - DC標(biāo)準(zhǔn)在冬季兩項(xiàng)包雙轉(zhuǎn)換器 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大小： | 137K |
| 代理商： | AFL27005D |
7
Internally, these ports differ slightly in their function.
In use, a low on Enable 1 completely shuts down all
circuits in the converter while a low on Enable 2
shuts down the secondary side while altering the
controller duty cycle to near zero. Externally, the
use of either port is transparent save for minor
differences in idle current. (See specification table).
Synchronization of Multiple Converters
When
requirements often dictate operation of the
converters
at
a
common
accommodate this requirement, the AFL series
converters provide both a synchronization input and
output.
operating
multiple
converters,
system
frequency.
To
The sync input port permits synchronization of an
AFL converter to any compatible external frequency
source operating between 500 and 700 KHz. This
input signal should be referenced to the input return
and have a 10% to 90% duty cycle. Compatibility
requires transition times less than 100 ns, maximum
low level of +0.8 volts and a minimum high level of
+2.0 volts. The sync output of another converter
which has been designated as the master oscillator
provides a convenient frequency source for this
mode of operation. When external synchronization
is not required, the sync in pin should be left
unconnected thereby permitting the converter to
operate at its' own internally set frequency.
The sync output signal is a continuous pulse train
set at 550
±
50 KHz, with a duty cycle of 15
±
5%.
This signal is referenced to the input return and has
been tailored to be compatible with the AFL sync
input port. Transition times are less than 100 ns and
the low level output impedance is less than 50
ohms. This signal is active when the DC input
voltage is within the specified operating range and
the converter is not inhibited. This output has
adequate drive reserve to synchronize at least five
additional converters. A typical synchronization
connection option is illustrated in Figure III.
Figure III. Preferred Connection for Parallel Operation
Optional
Synchronization
Connection
Power
Input
(Other Converters)
Share Bus
1
6
AFL
7
12
- Sense
Return
Enable 2
+ Vout
+ Sense
Share
Vin
Rtn
Case
Enable 1
Sync Out
Sync In
1
6
AFL
7
12
- Sense
Enable 2
+ Vout
Return
+ Sense
Share
Vin
Rtn
Case
Enable 1
Sync Out
Sync In
1
6
AFL
7
12
- Sense
Enable 2
+ Vout
Return
+ Sense
Share
Vin
Rtn
Case
Enable 1
Sync Out
Sync In
to Load
Parallel Operation — Current and Stress Sharing
Figure III. illustrates the preferred connection
scheme for operation of a set of AFL converters with
outputs operating in parallel. Use of this connection
permits equal sharing of a load current exceeding
the capacity of an individual AFL among the
members of the set. An important feature of the
AFL series operating in the parallel mode is that in
addition to sharing the current, the stress induced by
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AFL27028DW | DC to DC Converter |
| AFL27012D | Hi-Rel DC-DC Standard Dual Converter in a AFL package |
| AFL27015D | Hi-Rel DC-DC Standard Dual Converter in a AFL package |
| AFL27028DX | DC to DC Converter |
| AFL27028DY | DC to DC Converter |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AFL27005DW | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, MINIMUM SCREENING - Bulk |
| AFL27005DW/CH | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, CLASS H - Bulk |
| AFL27005DW/ES | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, ENVIRONMENTAL SCREENING - Bulk |
| AFL27005DW/HB | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, CLASS H EQUIVALENT, NO ELEM EVAL - Bulk |
| AFL27005DWCH | 制造商:IRF 制造商全稱:International Rectifier 功能描述:270V Input, Single Output |
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