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参数资料
| 型号： | PKB4418PIP |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | 2.280 X 0.750 INCH, LOW PROFILE PACKAGE-8 |
| 文件页数： | 6/8页 |
| 文件大小： | 451K |
| 代理商： | PKB4418PIP |
6
EN/LZT 108 6072 P1A Ericsson Inc., Power Modules , November 2002
PKB 4418 PINB
Output Voltage Trim for 1.8V
Operating Information
Input Voltage
The input voltage range 36...75Vdc meets the
requirements of the European Telecom Standard ETS 300
132-2 for normal input voltage range in -48V and -60V
DC power systems, -40.5...-57.0V and -50.0...-72V
respectively. At input voltages exceeding 75V, the power
loss will be higher than at normal input voltage and TC
must be limited to absolute max +110oC. The absolute
maximum continuous input voltage is 80V DC.
The converter will compensate for up to 0.5V voltage
drop between the sense voltage and the voltage at the
power module output pins. The output voltage and the
remote sense voltage offset must be less than the
minimum over voltage trip point.
To increase VO connect RTRIM-UP from +SENSE to TRIM
Remote ON/OFF (RC)
The PKB 4000 series DC/DC converters have two remote
on/off options available.
The standard converter is
provided with "negative logic" remote on/off.
The
negative logic remote on/off turns the converter off during
a logic high voltage on the on/off pin and on during a
logic low state. The second option is "positive Logic"
remote on/off which can be ordered by adding the suffix
"P" to the end of the part number such as PKB 4418 PIP.
"Positive logic" remote on/off turns the converter on
during a logic high and off during a logic low state.
Low
ON
Open/High
OFF
RC (primary)
Module
Standard Remote Control
Optional (P) Remote Control
Low
OFF
Open/High
ON
RC (primary)
Module
The remote on/off is referenced to the primary side. A
mechanical switch or an open collector transistor or FET
must be provided between the -Vin and the remote on/off
inputs to drive the RC inputs to turn the module on and
off.
In situations where it is desired to have the converter
power up automatically without the need for control
signals or a switch, the RC pin can be wired directly to the
-Input circuit on the application board.
(
)
R
TRIM-UP =5.11
k
(
)
VO (100+%) (100+2%)
1.225%
%
All PKB 4000 series DC/DC converters include current
limiting circuitry that allows them to withstand
continuous overloads or short circuit conditions on the
output. The output voltage will decrease towards zero for
output currents in excess of max output current (IOmax).
The converter will resume normal operation after removal
of the overload. The load distribution system should be
designed to carry the maximum short circuit output
current specified.
Current Limiting
Over Voltage Protection (OVP)
The PKB 4000 series DC/DC converters have latching
output overvoltage protection.
In the event of an
overvoltage condition, the converter will shut down. The
converter can be restarted by cycling the input voltage.
Remote Sense
The remote sense circuitry will compensate for moderate
amounts of resistance in the distribution system and allow
for voltage regulation at the load or other selected point.
The remote sense lines will carry very little current and do
not need a large cross sectional area. However, the sense
lines on a pcb should be located close to a ground trace or
ground plane. In a discrete wiring situation, the use of
twisted pair wires or other technique to reduce noise
susceptibility is highly recommended.
Output Voltage Adjust (Trim)
All PKB 4000 series DC/DC converters have an Output
Voltage Adjust pin (Trim). This pin can be used to adjust
the output voltage above or below VOi. When increasing
the output voltage, the voltage at the output pins
(including any remote sensing offset) must be kept below
the overvoltage trip point. Also note that at elevated
output voltages the maximum power rating of the
module remains the same, and the output current
capability will decrease correspondingly. These converters
trim according to the industry standard method.
To decrease VO connect RTRIM-DOWN from -SENSE to
TRIM
R
TRIM-DOWN =5.11
k
100
%
-
2
1
10
100
1000
10000
100000
0
2
4
6
8
10
12
14
16
18
20
C h a n g e I n O u t p u t V o l t a g e (
%)
Adjust
Resistor
Value
(KOhm)
D e c r e a s e
I n c r e a s e
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