HPS3000 Series Data Sheet

Signals and Controls - All Models

PSON#

The PSON# signal is required to remotely turn on/off the power supply. PSON# is an active low signal that turns on the 48 V power rail. When this

signal is not pulled low by the system, or left open, the 48 V output turns off. The 5 Vsb output remains on. This signal is pulled to a standby

voltage by a pull-up resistor internal to the power supply. The power supply fan(s) shall operate at the lowest speed.

PSON# Signal Characteristic

Signal Type

Accepts an open collector/drain input from the system. Pulled-up to the 5 Vsb located in power supply.

PSON# = Low

ON

PSON# = Open

OFF

MIN

MAX

Logic level low (power supply ON)

0 V

0.4 V

Logic level high (power supply OFF)

2.40 V

3.40 V

Source current, Vpson = low

--

4 mA

Power up delay: Tpson_on_delay

5 msec

400 msec

Timing Signal Definitions

Turn ON/OFF Timing

Item

Description

Min

Max

Units

Tvout_rise

48 V Output rise time

5

300

msec

Tsb_on_delay

Delay from AC being applied to 5 Vsb being within regulation.

1500

msec

Tac_on_delay

Delay from AC being applied to all output voltages being within regulation.

2000

msec

Tvout_holdup

Time all output voltages, including 5 Vsb, stay within regulation after loss of AC.

10

msec

Tpwok_holdup

Delay from loss of AC to de-assertion of PWOK

5

msec

Tpson_on_delay

Delay from PSON# active to output voltages within regulation limits.

5

400

msec

Tpson_pwok

Delay from PSON# de-active to PWOK being de-asserted.

50

msec

Tacok_delay

Delay from loss of AC input to de-assertion of ACOK#.

10

msec

Tpwok_on

Delay from output voltages within regulation limits to PWOK asserted at turn on.

100

1000

msec

Tpwok_off

Delay from PWOK de-asserted to 48 V dropping out of regulation limits.

1

1000

msec

Tpwok_low

Duration of PWOK being in the de-asserted state during an off/on cycle using AC

or the PSON# signal.

100

msec

Tsb_vout

Delay from 5 Vsb being in regulation to 48 V being in regulation at AC turn on.

50

2000

msec