Quality is our message
www.DataSheet4U.com
M-Power 2A
MP2ASeries
Application Note (Ver.1.1)
Ver.1.1 2007.01.12
MT5F18467
-1-
Quality is our message
www.DataSheet4U.com
Contents
1. Outline 2. Features 3. Line up 4. Description of the multi-oscillated current resonant circuit 4 – 1. Basic circuit configuration and operation 5. Description of M-Power 2A 5 – 1. Block diagram 5 – 2. External drawing 5 – 3. Description of pin functions 5 – 4. Circuit block descriptions ・ Power supply control v.
M-Power 2A
Quality is our message
www.DataSheet4U.com
M-Power 2A
MP2ASeries
Application Note (Ver.1.1)
Ver.1.1 2007.01.12
MT5F18467
-1-
Quality is our message
www.DataSheet4U.com
Contents
1. Outline 2. Features 3. Line up 4. Description of the multi-oscillated current resonant circuit 4 – 1. Basic circuit configuration and operation 5. Description of M-Power 2A 5 – 1. Block diagram 5 – 2. External drawing 5 – 3. Description of pin functions 5 – 4. Circuit block descriptions ・ Power supply control voltage ・ Q1 pulse width control circuit ・ MOSFET drive, dead time ・ Protection functions and latched shutdown 5 – 5. Internal structure 6. Design advices 6 – 1. Setting resonant conditions 6 – 2. Startup circuit, VCC winding circuit and maintaining a latched shutdown 6 – 3. Q2 gate pin 6 – 4. VW pin 6 – 5. CON pin 6 – 6. VREF pin 6 – 7. I S pin 6 – 8. FB pin
Warning
MT5F18467
-2-
Quality is our message
www.DataSheet4U.com
1. Outline In recent years switching power supplies have been required to be not only compact and light weight but also to have low power consumption and a high power factor. A current resonant converter is applied, because it is superior to other topology from the viewpoint of low noise and efficiency. However at light loads efficiency is low and several watts of loss occur even at no load. This means that a sub-power supply is required at standby time which adds to the size of the unit. Fuji Electric has utilized the advantages of the current resonant converter.