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PFE1100-12-054xA

tech.support@psbel.com

PARAMETER

DESCRIPTION / CONDITION

MIN

NOM

MAX

UNIT

F

Input Fuses (L+N)

Not user accessible, quick-acting (F)

16

A

OV Threshold

13.3

14.5

VDC

OV Latch Off Time

1

ms

OV Threshold

115

125

%

OV Latch Off Time

1

ms

Current Limit

PFE1100-12-054NA

93.5

74

100

78

A

Current Limit

PFE1100-12-054RA

92

72

100

78

Max Short Circuit

Current

110

A

Short Circuit

Regulation Time

2

ms

Short Circuit Latch

Off Time

Time to latch off when in short circuit

200

ms

Over Temperature on

Heat Sinks

Automatic shut-down

115

°C

6.1 OVERVOLTAGE PROTECTION

The PFE front-ends provide a fixed threshold overvoltage (OV) protection implemented with a HW comparator. Once an OV

condition has been triggered, the supply will shut down and latch the fault condition. The latch can be unlocked by

disconnecting the supply from the AC mains or by toggling the PSON_L input.

6.2 VSB UNDERVOLTAGE DETECTION

Both main and standby outputs are monitored. LED and PWOK_H pin signal if the output voltage exceeds ±5% of its nominal

voltage. Output undervoltage protection is provided on the standby output only. When VSB falls below 75% of its nominal

voltage, the main output V1 is inhibited.

6.3 CURRENT LIMITATION

MAIN OUTPUT

The main output exhibits a substantially rectangular output characteristic controlled by a software feedback loop. If it runs in

current limitation and its voltage drops below ~10.0 VDC for more than 200 ms, the output will latch off (standby remains on).

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