High Power PP-750 Pro HPC-750-B14S Manual De Usuario
Los códigos de productos
HPC-750-B14S
Switching Power Supply Specifications
Page
6
3.6 5VSB
5VSB is requierd for the implementation of PS-ON described above. 5VSB is a standby
voltage that may be used to power circuits that require power input during the powered-
down state of all power rails. The 5 VSB pin should deliver 5V ± 5% at a minimum of 3.0
A for PC board circuits to operate. Conversely, PC board should draw no more than 3.0A
maximum form this pin. This power may be used to operate circuits such as soft power
control.
voltage that may be used to power circuits that require power input during the powered-
down state of all power rails. The 5 VSB pin should deliver 5V ± 5% at a minimum of 3.0
A for PC board circuits to operate. Conversely, PC board should draw no more than 3.0A
maximum form this pin. This power may be used to operate circuits such as soft power
control.
3.7 PG-OK
PG-OK is a power good signal and should be asserted high by power supply to indicate
that the +5 VDC and +3.3 VDC outputs are above the under-voltage thresholds of the
power supply. When this signal is asserted high, there should be sufficient mains energy
stored by the converter to guarantee continuous power operation within specification.
Conversely, when either the +5VDC or the +3.3VDC output voltage falls below the under-
voltage threshold, or when mains power has been removed for a time sufficiently long so
that power supply operation is no longer guaranteed, PG-OK should be deasserted to a low
state. See Figure 1 for a representation of the timing characteristics of the PG-OK,PS-ON,
and germane power rail signals.
that the +5 VDC and +3.3 VDC outputs are above the under-voltage thresholds of the
power supply. When this signal is asserted high, there should be sufficient mains energy
stored by the converter to guarantee continuous power operation within specification.
Conversely, when either the +5VDC or the +3.3VDC output voltage falls below the under-
voltage threshold, or when mains power has been removed for a time sufficiently long so
that power supply operation is no longer guaranteed, PG-OK should be deasserted to a low
state. See Figure 1 for a representation of the timing characteristics of the PG-OK,PS-ON,
and germane power rail signals.
3.8 3.3V Sense
A default 3.3V sense line should be implemented pin 13 of the connector.
3.9 Capacitive
Load
The power supply should be able to power up and operate normally with the following
capacitances simultaneously present on the DC outputs.
capacitances simultaneously present on the DC outputs.
Output
Capacitive load (uF)
+5V 6,000
+12V1 5,000
+12V2 3,000
+3.3V 6,000
-12V 350
+5VS 350
4. Protection
4.1 Input
Protection
In primary circuit of the power supply , a protected fuse is inserted. Only internal fault of
the power supply will cause the fuse blown. Any overload or short circuit at DC output will
keep from fuse brown or fire hazard
the power supply will cause the fuse blown. Any overload or short circuit at DC output will
keep from fuse brown or fire hazard