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参数资料
| 型号： | PMC8518TSN |
| 厂商： | ERICSSON POWER MODULES AB |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 50 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-6 |
| 文件页数： | 21/34页 |
| 文件大小： | 951K |
| 代理商： | PMC8518TSN |
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Ericsson Internal
PRODUCT SPECIFICATION
3 (6)
Prepared (also subject responsible if other)
No.
ESKEVIN
3/1301-BMR 619 8518 Uen
Approved
Checked
Date
Rev
Reference
SEC/D (Julia You)
ECHWANG
2007-8-16
A
5 mF for PMC 8518 can cause the regulator into over current
protection mode (hick-up) due to high start up current. The
output filter must therefore be designed without exceeding
the above stated capacitance levels if the ESR is lower then
30-40 m.
Output Voltage Adjust (Vadj)
All PMC 8000 Series DC/DC regulators have an Output
Voltage adjust pin(Vadj). This pin can be used to adjust the
output voltage about output voltage initial setting(0.75V).
When increasing the output voltage the maximum power
rating of the converter remains the same, and the output
current capability will therefore decrease correspondingly. To
increase the output voltage a resistor or a voltage signal
should be connected/applied between Vadj pin and GND. The
resistor/voltage signal value for some standard output
setponts are given below, for other voltage setpoints use the
formulas to calculate the correct resistor or voltage signal. For
output voltages of 5.25V and higher the input voltage is
restricted to maximum 14Vin.
Formula 1: Radj = (10500/(Vout — 0.7525)) — 1000 (ohm)
Formula 2: Vtrim = (0.7 — 0.0667 x (Vout — 0.7525)) (V)
Vout (V)
Radj (kohm)
Vtrim (V)
0.75
Open
1.00
41.42
0.684
1.20
22.46
0.670
1.50
13.05
0.650
1.80
9.024
0.630
2.50
5.009
0.583
3.30
3.122
0.530
5.00
1.472
0.417
5.50
1.212
0.383
Parallel Operation
The PMC 8000 Series DC/DC regulators can be connected in
parallel with a common input. Paralleling is accomplished by
connecting the output voltage pins directly and using a load
sharing device on the input. Layout considerations should be
made to avoid load imbalance. For more details on
paralleling, please consult your local applications support.
Remote Sense
All PMC 8000 Series DC/DC regulators have a positive
remote sense pin that can be used to 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 line will carry very little current and
does not need a large cross sectional area. However, the
sense line on the PCB should be located close to a ground
trace or ground plane. The remote sense circuitry will
compensate for up to 10% voltage drop between the sense
voltage and the voltage at the output pins from Vonom. If the
remote sense is not needed the sense pin should be left open
or connected to the positive output.
Over Temperature Protection (OTP)
The PMC 8000 Series DC/DC regulators are protected from
thermal overload by an internal over temperature shutdown
circuit. When the PCB temperature near the IC circuit reaches
130 °C the converter will shut down immediately. The
regulator will make continuous attempts to start up (non-
latching mode) and resume normal operation automatically
when the temperature has dropped below the temperature
threshold.
Over Current Protection (OCP)
The PMC 8000 Series DC/DC regulators 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). When the current
limit is reached the regulator will go into hiccup mode.
The current limit is temperature dependent, i.e. the limit
decrease at higher operating temperature, the regulator is
guaranteed to start at Iomax × 1.25 @ Tref 115°C.
The regulator will resume normal operation after removal of
the overload. The load distribution system should be
designed to carry the maximum output short circuit current
specified.
E
PMC 8518 series
POL regulator, Input 12 V, Output 10 A/50 W
EN/LZT 146 063 R3A Aug 2007
Ericsson Power Modules AB
Technical Specication
28
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