Radiated EMS (Electro-Magnetic Fields)
Operating Information
Radiated EMS is measured according to test methods in
IEC Standard publ. 801-3. No deviation outside the VO
tolerance band will occur under the following conditions:
Fuse Considerations
To prevent excessive current from flowing through the input
supply line, in the case of a short-circuit across the converter
input, an external fuse should be installed in the non-earthed
input supply line. We recommend using a fuse rated at
approximately 2 to 4 times the value calculated in the formula
below:
Frequency range
0.01...200 MHz
200...1,000 MHz
1...12 GHz
Voltage level
3 Vrms/m
3 Vrms/m
10 Vrms/m
PO
max
Iin
=
max
Conducted EMS
(ηmin × V min
)
I
Electro Magnetic Susceptibility is measured by injection of
electrical disturbances on the input terminals. No deviation
outside the VO tolerance band will occur under the following
conditions:
Refer to the fuse manufacturer for further information.
Remote Control (RC)
Frequency range
30...300 MHz
Voltage level
1.0 Vrms
Turn-on or turn-off can be realized by using the RC-pin. If pin
7 is connected to pin 11 the power modules turns off. Normal
operation is achieved if pin 7 is open (NC). To ensure safe turn-
off the voltage difference between pin 7 and 11 shall be less
than 1.0V. RC is an open collector compatible input. A sink
capacity of 1mA is needed. (see fig. 1).
The signal is amplitude modulated with 1 kHz/80% and
applied in both differential and common mode.
ESD
Electro Static Discharge is tested according to IEC publ. 801-
2. No destruction will occur if the following voltage levels are
applied to any of the terminal pins:
PKF 4128BSI
RC (pin 7)
Test
Voltage level
4 kV
2 kV
Air discharge
Contact discharge
EFT
Electrical Fast Transients on the input terminals could affect
the output voltage regulation causing functional errors on
the Printed Board Assembly (PBA). The PKF power modules
withstand EFT levels of 0.5 kV keeping VO within the
tolerance band and
-In (pin 11)
Figure 1
2.0 kV without destruction. Tested according to IEC publ.
801-4.
Output Ripple & Noise (VOac)
Output ripple is measured as the peak to peak voltage of the
fundamental switching frequency.
EN/LZT 146 089 R1A ©Ericsson Power Modules AB, March 2005
6
ERICSSON [ ERICSSON ]
