PKB 4713 PINB
General
Safety
Absolute Maximum Ratings
The PKB 4000 PI Series DC/DC converters
are designed in accordance with Safety
Standards IEC/EN/UL 60 950, Safety of
Information Technology Equipment.
Characteristics
min
max
Unit
TPcb
TS
Maximum Operating Pcb Temperature
Storage temperature
–
40
55
+110
+125
°C
°C
–
The PKB 4000 Series DC/DC converters are
ULC 60 950 recognized and certified in
accordance with EN 60 950.
VI
Input voltage
–
0.5
+80
Vdc
Vdc
VISO
2250
Isolation voltage (input to output test voltage)
VTrans
VRC
Input Voltage Transient
(10 usec)
100
Vdc
The DC/DC converters should be installed in
end-use equipment, in accordance with the
requirements of the ultimate application.
The input source must be isolated by
minimum Basic Insulation from the primary
circuit in accordance with IEC/EN/UL 60
950. If the input voltage to the DC/DC
converter is 75Vdc or less, then the output
remains SELV (Safety Extra Low Voltage)
under normal and abnormal operating
conditions. Single fault testing in the input
power source circuit should be performed
with the DC/DC converter connected to
demonstrate that the input voltage does not
exceed 75Vdc. If the input power source
circuit is a DC power system, the source
maybe treated as a TNV2 circuit and testing
has demonstrated compliance with SELV
limits and isolation requirements equivalent
to Basic Insulation in accordance with IEC/
EN/UL 60 950.
-0.5
-0.5
15
Vdc
Vdc
Remote control voltage pin 2 (measured from pin 1)
Output adjust voltage pin 6 (measured from pin 5)
Vadj
2 x Vo
Note:
Stress in excess of Absolute Maximum Ratings may cause permanent damage. Absolute Maximum Ratings,
sometimes referred to as "no destruction limits", are normally tested with one parameter at a time
exceeding the limits of the Output data or Electrical Characteristics.
Input TPcb < TPcb max
Characteristics
Conditions
min
typ
max
Unit
VI
VI
Input voltage range1)
IO = 0...IOmax
38
30
75
35
Vdc
Vdc
Turn-off input voltage
Turn-on input voltage
Ramping from higher
voltage
33.5
34.5
off
VIon
Ramping from lower
voltage, IO = 0...IOmax
32
36
Vdc
C I
IIac
Input capacitance
2.18
10
uF
Reflected ripple current
5 Hz to 20 MHz
mAp-p
II
Maximum input current
Input idling power
VI = VImin,
IO =0, V = 53 V
72 W
2.38
1.6
A
max
PIi
W
W
I
PRC
Input stand-by power
(turned off with RC)
V =53V, RC open
0.055
I
It is recommended that a fast blow fuse with a
rating of 5A be used at the input of each DC/
DC converter. The PKB series DC/DC
converters are approved for a maximum fuse
rating of 15A. If a fault occurs in the DC/DC
converter that imposes a short circuit on the
input power source, this fuse will provide the
following functions:
VTRIM
Maximum input voltage
on trim pin
6.6
Vdc
Note:
1) The input voltage range 38...75 V meets the requirements in the European Telecom Standard prETS 300
132-2 for Normal input voltage range in 48 V and 60 V DC power systems, –40.5...–57.0 V and –50.0...–72.0 V
respectively.
Environmental Characteristics
Characteristics
Test procedure & conditions
Random
Vibration
IEC 68-2-34ED
IEC 68-2-6 Fc
Frequency
Spectral density
Duration
10...500 Hz
• Isolate the faulty DC/DC converter from the
input source so as not to affect the
2
0.025 g /Hz
10 min each direction
operation of other parts of the system.
Sinusoidal
Vibration
Frequency
Amplitude
10...500 Hz
0.75mm
• Protect the distribution wiring from
excessive current and power loss thus
preventing hazardous overheating.
Acceleration
Number of cycles
10g
10 in each axis
Shock
(Half sinus)
IEC 68-2-27 Ea
IEC 68-2-14 Na
Peak acceleration
Duration
100g
3ms
Temperature
Number of cycles
-40°C… +125°C
300
Temperature
change
The galvanic isolation is verified in an electric
strength test. The test voltage (VISO) between
input and output is 2250 Vdc for 60 seconds.
Leakage current is less than 1uA at nominal
input voltage.
Temperature
Humidity
Duration
85°C
85% RH
1000 hours
Accelerated
damp heat
IEC 68-2-3 Ca
with bias
Temperature, solder 260°C
Duration
Solder
resistability
IEC 68-2-20 Tb 1A
10…13 s
Water
Isopropyl alcohol
Method
+55 ±5°C
+35 ±5°C
with rubbing
Resistance to
cleaning solvents
IEC 68-2-45 XA
Method 1
The flammability rating for all construction
parts of the DC/DC converter meets UL 94V-0.
EN/LZT 108 6071 P1D ©Ericsson Inc., Power Modules , February 2003
2
ERICSSON [ ERICSSON ]
