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參數(shù)資料
| 型號： | AFL5005DY |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| 文件頁數(shù)： | 9/11頁 |
| 文件大小： | 241K |
| 代理商： | AFL5005DY |
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 standby current. (See specification
table).
Synchronization of Multiple Converters
When operating multiple converters, system requirements
often dictate operation of the converters at a common
frequency. To accommodate this requirement, the AFL
series converters provide both a synchronization input and
a synchronization output.
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 synchroniza-
tion is not required, the sync in pin should be left open
(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 connection is illustrated in Figure III.
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 among the members of a set where total
load current exceeds the capacity of an individual AFL.
An important feature of the AFL series operating in the
parallel mode is that in addition to sharing the current,
the stress induced by temperature will also be shared.
Thus if one member of a paralleled set is operating at a
higher case temperature, the current it provides to the
load will be reduced as compensation for the tempera-
FigureIII.PreferredConnectionforParallelOperation
Optional
Synchronization
Connection
Power
Input
(Other Converters)
Share Bus
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
1
6
AFL
7
12
- Sense
Enable 2
+ Vout
Return
+ Sense
Share
Vin
Rtn
Case
Enable 1
Sync Out
Sync In
to Load
相關PDF資料 |
PDF描述 |
|---|---|
| AFL5005SZ/HB | 1-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| AFL5012SW | 1-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| AFL5015DX | 2-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| AFL5015SW/HB | 1-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| AFL2812DZ | 2-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AFL5005DY/CH | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, CLASS H - Bulk |
| AFL5005DY/ES | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, ENVIRONMENTAL SCREENING - Bulk |
| AFL5005DY/HB | 制造商:International Rectifier 功能描述:DC/DC CONVERTER, CLASS H EQUIVALENT, NO ELEM EVAL - Bulk |
| AFL5005DY-CH | 制造商:IRF 制造商全稱:International Rectifier 功能描述:ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
| AFL5005DY-ES | 制造商:IRF 制造商全稱:International Rectifier 功能描述:ADVANCED ANALOG HIGH RELIABILITY HYBRID DC/DC CONVERTERS |
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