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参数资料
| 型号： | PKR4628SPBI |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 6 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT, SMD-18 |
| 文件页数： | 20/36页 |
| 文件大小： | 1062K |
| 代理商： | PKR4628SPBI |
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Ericsson Internal
PRODUCT SPECIFICATION
2 (5)
Prepared (also subject responsible if other)
No.
ESKEVIN
3/1301-BMR 640 1401+ Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
EZYPING
2007-8-27
D
Operating information
Input Voltage
The input voltage range 38…72Vdc meets the requirements
of the European Telecom Standard ETS 300 132-2 for normal
input voltage range in —48 and —60 Vdc systems,
-40.5…-57.0 V and —50.0…-72 V respectively.
At input voltages exceeding 72 V, the power loss will be
higher than at normal input voltage and Tref must be limited to
absolute max +85°C. The absolute maximum continuous
input voltage is 75Vdc.
Turn-off Input Voltage
The converters monitor the input voltage and will turn on and
turn off at predetermined levels.
To increase V
Ion a resistor should be connected between pin
11 and 17. The resistance is given by the following equation:
R
set(up) = 100(X - Von)/(Von - VIon) kΩ
To decrease V
Ion a resistor should be connected between pin
10 and 11. The resistance is given by the following equation:
R
set(down) = 370(Von - Y)/(VIon - Von) kΩ
Variants/Parameters
V
ion
X
Y
PKR4310
PKR4510
34.8
96
28.4
PKR4611
PKR4713
35.1
96
28.6
PKR4621
35.7
98
28.9
PKR4622
35.3
96
28.6
PKR4628
34.9
96
28.6
Remote Control (RC)
The products are fitted with a
remote control function referenced
to the primary negative input
connection (- In), with positive
logic. The RC function allows the
converter 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 0.1 mA. When the RC
pin is left open, the voltage generated on the RC pin is
<15 V. To ensure that the converter stays off the voltage must
be below 1.0V.
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. The PKR 4000 Series DC/DC 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 maximum capacitive load. If
the input voltage source contains significant inductance, the
addition of a 10 μF 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 μH.
External Decoupling Capacitors
When powering loads with significant dynamic current
requirements, the voltage regulation at the load can be
improved by addition of decoupling capacitors at the load.
The most effective technique is to locate low ESR ceramic
capacitors as close to the load as possible, using several
capacitors to lower the effective ESR. The ceramic capacitors
will handle high-frequency dynamic load changes while
electrolytic capacitors should be used to handle low
frequency dynamic load changes.
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 μF/A of output
current can be added without any additional analysis.
The absolute maximum value of output capacitance is
5 000 μF. For further information please contact your local
Ericsson Power Modules representative.
Output Voltage Adjust (Vadj)
All PKR 4000 Series DC/DC converters have an Output
Voltage Adjust pin (Vadj). This pin can be used to adjust the
output voltage above or below output voltage initial setting.
At increased output voltages the maximum power rating of
the converter remains the same, and the max output current
must be decreased correspondingly.
The output voltage can be increased or decreased by means
of external resistors or other external circuitry. If other
circuitry is used, the slew rate has to be limited to maximum 5
V/ms. To increase the voltage a resistor should be connected
between the Vadj pin and +IN. To decrease the output voltage,
a resistor is connected between Vadj pin and NOR pin. The
resistor value of the Output voltage adjust function is
according to information given under the Output section for
the respective product.
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6E September 2007
Ericsson Power Modules AB
Technical Specication
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6F November 2007
Ericsson Power Modules AB
Technical Specication
E
PKR 4000 series
DC/DC converters, Input 36-75 V, Output up to 1.5 A/7 W
EN/LZT 146 302 R6G November 2008
Ericsson Power Modules AB
Technical Specication
27
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