SMPS (switch mode power supply) converts AC voltage to DC voltage to power computer components. It uses a fan to dissipate heat. SMPS has input sockets for AC power and sometimes provides output AC power to monitors. It supplies DC power to devices through connectors on the motherboard and peripherals like ATX, peripheral, floppy drive, and Molex connectors. Splitters are sometimes used to provide additional power connections when there are not enough built-in connectors.

1. TOPIC
SMPS
(SWITCH MODE POWER SUPPLY)

2.  SMPS: means Switch Mode Power Supply, they
are Digital in Nature.They step down voltage
by “switching” it on and off, hence their
name.
 SMPS converts AC Voltage to DC voltage. All
the computer parts work on DC supply.SMPS
supplies DC voltage through connectors on
Motherboard and various other devices.

4.  As you can see back side of SMPS. FAN is
used to dissipate/reduce the heat generated
in SMPS. In Fig , there are two AC power
sockets. One is for AC 220 V input to SMPS
and the other is for output AC 220 V to your
Monitor/LCD. In some SMPS there is only one
socket for AC 220 V input to SMPS . In this
case the monitor will take input supply
directly from other power source

5.  AT POWER CONNECTOR
 ATX POWER CONNECTOR
 STANDARD PHERIPHERALS POWER
CONNECTOR
 FLOPPY DRIVE POWER CONNECTOR

6.  THIS TYPE OF POWER CONNECTOR HAVE 2
COONECTOR WHICH ONE IS P8 AND
ANOTHER ONE IS P9 USE IN OLD PC.

7.  USES A SINGLE P1 POWER CONNECTOR
 THE P1 HAS A NOTCHED CONNETOR TO
ENSURE PROPER INSTALLATION

8.  PRIMARILY USED FOR DEVICES THAT REQUIRE
12V AND 5V OF POWER
 A MOLEX CONNECTOR USES “CHAMFERS”
(NOTCHES) FOR EASY INSTALLATION
 INSTALLING A MOLEX BACKWARDS CAN
DESTORY THE DEVICES INTO WHICH THE
MOLEX INTO CONNECTED.

9.  PRIMARILY FOR 3.5-INCH FLOPPY DRIVES
 CARE SHOULD BE TAKEN WHEN INSTALLING
MINI CONNECTORS (BERG CONNECTORS).

10.  OCCASIONALLY, THERE ARE NOT ENOUGH
CONNECTORS TO POWER ALL THE DEVICES
INSIDE A PC
 SPLITTERS ARE USED TO CREATE MORE
CONNECTIONS

11.  MANY MOTHERBOARD REQUIRE A SECOND,
FOUR-WIRE CONNECTOR TO PUSH MORE 12-
VOLT POWER INTO THE BOARD