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參數(shù)資料
| 型號： | PKJ4719PIT |
| 廠商： | ERICSSON POWER MODULES AB |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 75 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, HALF BRICK PACKAGE-9 |
| 文件頁數(shù)： | 28/39頁 |
| 文件大小： | 1007K |
| 代理商： | PKJ4719PIT |
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Limited Internal
PRODUCT SPECIFICATION
4 (6)
Prepared (also subject responsible if other)
No.
SEC/D EPHILIP
3/1301-BMR630
Approved
Checked
Date
Rev
Reference
SEC/D EPHILIP
(MICJOHN)
2006-1-27
A
Operating information, cont.
Input And Output Impedance
Parallel Operation
Two converters may be paralleled for redundancy if the total
power is equal or less than PO max. It is not recommended to
parallel the converters without using external current sharing
circuits.
Over Temperature Protection (OTP)
The impedance of both the input source and the load will
interact with the impedance of the DC/DC converter. It is
important that the input source has low characteristic
impedance. The converters are designed for stable operation
without external capacitors connected to the input or output.
The performance in some applications can be enhanced by
addition of external capacitance as described under External
Decoupling Capacitors. If the input voltage source contains
significant inductance, the addition of a 100 F capacitor
across the input of the converter will ensure stable operation.
The capacitor is not required when powering the DC/DC
converter from an input source with an inductance below
10 H.
External Decoupling Capacitors
The converters are protected from thermal overload by an
internal over temperature shutdown circuit. When the
baseplate or case temperature exceeds 110°C the converter
will shut down immediately (latching). The converter can be
restarted by cycling the input voltage or using the remote
control function.
Over Voltage Protection (OVP)
The converters have output over voltage protection that will
shut down the converter in over voltage conditions. The
converter can be restarted by cycling the input voltage or
using the remote control function.
Over Current Protection (OCP)
When powering loads with significant dynamic current
requirements, the voltage regulation at the point of load can
be improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic
and electrolytic capacitors as close to the load as possible,
using several parallel capacitors to lower the effective ESR.
The ceramic capacitors will handle high-frequency dynamic
load changes while the electrolytic capacitors are used to
handle low frequency dynamic load changes. Ceramic
capacitors will also reduce any high frequency noise at the
load.
It is equally important to use low resistance and low
inductance PCB layouts and cabling.
External decoupling capacitors will become part of the control
loop of the DC/DC converter and may affect the stability
margins. As a “rule of thumb”, 100 F/A of output current can
be added without any additional analysis.
The recommended absolute maximum value of output
capacitance is 10 000 F. For further information please
contact your local Ericsson Power Modules representative.
The converters include current limiting circuitry for protection
at continuous overload.
The output voltage will decrease towards zero for output
currents in excess of max output current (max IO). The
converter will resume normal operation after removal of the
overload. The load distribution should be designed for the
maximum output short circuit current specified.
E
PKJ 4000 PI series
DC/DC converters, Input 36-75 V, Output 30A/150W
EN/LZT 146 309 R1B February 2006
Ericsson Power Modules AB
Technical Specication
34
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