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參數(shù)資料
| 型號(hào)： | PKM4402NGPIHSG |
| 廠商： | ERICSSON POWER MODULES AB |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 480 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, QUARTER BRICK PACKAGE-7 |
| 文件頁(yè)數(shù)： | 4/19頁(yè) |
| 文件大小： | 1529K |
| 代理商： | PKM4402NGPIHSG |
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Ericsson Internal
PRODUCT SPECIFICATION
2 (6)
Prepared (also subject responsible if other)
No.
ESECZHW
3/1301-BMR 647/2 Uen
Approved
Checked
Date
Rev
Reference
SEC/D/V (Betty Wu)
EJANLLI
2009-3-24
A
Operating information
Input Voltage
The input voltage range of the DC/DC converters is especially
adapted to meet the requirements of non-battery backup -48 V
systems.
At input voltages exceeding 48 V, the power loss will be higher
than at normal input voltage and Tref must be limited to
absolute max +125°C.
Turn-off Input Voltage
The DC/DC converters monitor the input voltage and will turn
on and turn off at predetermined levels.
The minimum hysteresis between on and off input
voltage is 1.0 V.
Remote Control (RC)
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), with positive logic
option available. The RC function
allows the product to be turned
on/off by an external device like a
semiconductor or mechanical
switch. The RC pin has an internal
pull up resistor to + In.
The maximum required sink current is less than 1 mA. When
the RC pin is left open, the voltage generated on the RC pin is
10 V. The second option is “positive logic” remote control,
which can be ordered by adding the suffix “P” to the end of the
part number. The DC/DC converter will turn on when the input
voltage is applied with the RC pin open. Turn off is achieved
by connecting the RC pin to the - In. To ensure safe turn off
the voltage difference between RC pin and the - In pin shall be
less than 0.8 V. The DC/DC converter will restart automatically
when this connection is opened. Design note 21 explains
more in detail about the RC pin.
Input and Output Impedance
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. Minimum recommended external input
capacitance is 100 F. The performance in some applications
can be enhanced by addition of external capacitance as
described under External Decoupling Capacitors.
External Decoupling Capacitors
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.
The absolute maximum value of output capacitance is
6000 F.
For further information please contact your local Ericsson
Power Modules representative.
Parallel Operation
With the same input voltage and an output contact/trace
resistance of 1 m or higher, the converters may be paralleled
for redundancy if the total current is equal to or less than
n × 0.95 × IO max.
For best result, trace resistance and module cooling must be
symmetrical. At this condition, the modules current share
within 5% at the maximum load.
No external components are required for parallel operation or
load sharing.
Over Temperature Protection (OTP)
The dc/dc converters are protected from thermal overload by
an internal over temperature shutdown circuit.
When Tref as defined in thermal consideration section
exceeds 125°C the DC/DC converter will shut down. The
DC/DC converter will make continuous attempts to start up
(non-latching mode) and resume normal operation
automatically when the temperature has dropped below the
temperature threshold.
E
PKM 4402NG PIDP
IBC 5:1 Ratio, Input 38-55 V, Output 63A / 480W
EN/LZT 146 405 R1B June 2009
Ericsson AB
Technical Specification
12
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