FNP1500_10 Datasheet, PDF (6/17 Pages) Power-One – Front-Ends & FNR-3 Power Shelves Data Sheet

FNP1500/1800 Front-Ends
& FNR-3 Power Shelf Data Sheet
Protection
Parameter
Input fuse
Inrush current limitation
Output
Overvoltage protection latching¹
Overtemperature protection
1 _{Remove input voltage to reset.}
Conditions/Description
Not user accessible
Tracking
Absolute for 48V models
Absolute for 12V models
Automatic power shutdown at T_C
Min
Nom Max Unit
25A, fast blow
With NTCs
No-load -, short circuit - and overload proof
115
122 % V_{o nom}
59.5
V
16.85
V
95
°C
Control
Specification is valid for input voltage, load, and temperature ranges, unless otherwise stated.
Parameter
Conditions/Description
Status Indication
LEDs: DC OK (green), AC OK (green); fan fail and overtemperature (amber)
I²C digital bus
Monitors alarm functions and sets parameters
PS present pin
Contact closure to logic ground ( internal pull-down resistor of 1 kΩ)
PS remote shutdown / Inhibit pin
TTL compatible signal, inhibited when open contact, high or at TTL logic “1”.
Signal referenced to logic return (LRTN)
Power supply OK (I²C)¹
AC OK & DC OK & no overcurrent & no overtemperature & fans working
DC current fail (I²C)¹
AC fail / Power down warning
(I²C & OC)²
Overcurrent on I_o1
Provides a warning that the input power has failed at least 5 ms before the output falls
out of regulation (<90% V_{o1 set}).
Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
AC fail will go high or open during power fail condition and will go low when input is within
the operating range.
A Power Fail warning will turn off the green AC OK LED.
DC fail / Output voltage fault
(I²C & OC)²
Temperature warning (I²C & OC)²
Internal undervoltage and overvoltage supervision of V_o1.
Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
DC fail will go high or open if V_o1 is < 90% or > 110% of V_{o1 set}, measured in front of the
ORing FETs.
A green LED on the front panel indicates normal operation.
The LED will flash if in parallel operation V_o1 is OK, but the unit is disabled.
I²C critical temperature warning: Indicates that the operating temperature has reached
[T_shut-down – 10K]
I²C & OC overtemperature warning: Indicates if the unit is in overtemperature shutdown.
Open collector signal with 20 mA pull-down capability, referenced to logic return (LRTN).
The OC-output will go low 100 ms before an overtemperature condition shuts down the
unit.
An amber LED on the front panel indicates overtemperature or fan fail.
DC voltage monitoring (I²C)¹
Monitors the voltage V_o1 at the output connector.
Accuracy ± 0.45 V over setting range, temperature and load.
DC current monitoring (I²C)¹
Monitors the output current I_o1 : Accuracy ± 0.4A over the load range.
DC voltage trimming
(I²C or external resistor)¹
Output voltage trimming V_o1: ± 8 % of V_{o set}
Setting accuracy over I²C: ± 50mV at Vo nom, ± 150 mV over setting range
Fan speed control (I²C)¹
Two fan speed levels automatically set depending on the internal temperature.
The fan speed can be set to full speed or automatic control.
Fan OK (I²C & OC)²
Indicates if the fans are operating or have failed.
Synch. startup pin
Overcurrent signal which can be used for synchronous startup of units in parallel or to
recover from an overload condition. (See application note).
1 _{Detailed I}2_{C information is available from the model’s I}2_{C Manual found on the Power-One web site.}
2 _{Provided over the I}2_{C interface and as an open collector signal on the output connector (OC).}
MCD10074 Rev. 1.2, 15-Apr-10
Page 6 of 17
www.power-one.com