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DATA SHEET
8.4
PRESENT_L
This signaling pin is recessed within the connector and will contact only once all other connector contacts are closed. This
active-low pin is used to indicate to a power distribution unit controller that a supply is plugged in. The maximum current on
PRESENT_L pin should not exceed 10 mA.
Figure 25 - PRESENT_L signal pin
V1
VSB
0V
PRESENT_L
PFE
PDU
8.5
PSKILL_H INPUT
The PSKILL_H input is active-high and is located on a recessed pin on the connector and is used to disconnect the main
output as soon as the power supply is being plugged out. This pin should be connected to SGND in the power distribution
unit. The standby output will remain on regardless of the PSKILL_H input state.
8.6
AC TURN-ON / DROP-OUTS / ACOK_H
The power supply will automatically turn-on when connected to the AC line under the condition that the PSON_L signal is
pulled low and the AC line is within range. The ACOK_H signal is active-high. The timing diagram is shown in Figure 26 and
referenced in Table 4 .
Table 4 - AC Turn-on / Dip Timing
Figure 26 - AC turn-on timing
OPERATING CONDITION
MIN
MAX UNIT
t AC VSB
AC Line to 90% V VSB
2
sec
t AC V1
t ACOK_H on1
t ACOK_H on2
t ACOK_H off
AC Line to 90% V 1
ACOK_H signal on delay (start-up)
ACOK_H signal on delay (dips)
ACOK_H signal off delay
2
2000
100
5
sec
ms
ms
ms
AC
Input
t VSB V1 del
V SB to V 1 delay
10
500
ms
V SB
t V1 rise
t V1 holdup
t VSB holdup
Effective V 1 holdup time
Effective V SB holdup time
12
20
ms
ms
V 1
t AC VSB
t VSB rise
t VSB V1 del
t ACOK_H V1 ACOK_H to V 1 holdup
t ACOK_H VSB ACOK_H to V SB holdup
7
15
ms
ms
PSON_L
t AC V1
t V1 off
t VSB off
Minimum V 1 off time
Minimum V SB off time
1000 1200
1000 1200
ms
ms
ACOK_H
PWOK_H
t ACOK_H on1
t PWOK_H del
AC
Input
Figure 27 - AC short dips
AC
Input
Figure 28 - AC long dips
V SB
t V1 holdup
V SB
t VSB holdup
t VSB off
V 1
t ACOK_H on2
t V1 off
V 1
t ACOK_H V1
t V1 holdup
t V1 off
PSON_L
ACOK_H
t ACOK_H off
PSON_L
ACOK_H
t ACOK_H off
t ACOK_H VSB
PWOK_H
BCD.00012_AI Oct-24-2013
t PWOK_H warn
11
PWOK_H
t PWOK_H warn
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