BD8622EFV Datasheet, PDF (1/16 Pages) Rohm – Built-in 1ch FET Light Load Type DC/DC converters

TECHNICAL NOTE
System Power Supply for TV Series
Built-in 1ch FET
Light Load Type
DC/DC converters
BD8622EFV
●Description
BD8622EFV has realized the high performance and reliability required as a power supply for thin-screen TV.
Due to the high-speed load response, it is most suitable for TV-purpose processors with increasingly high performance, and due to the
wide phase margin it leaves a good margin for board pattern & constant setting and so facilitates its application design.
As a high-reliability design, it has various built-in protection circuits (overcurrent protection, output voltage abnormal protection, thermal
protection, and off-latch function at the time of abnormality etc.), therefore as an advantage it does not easily damage in every possible
abnormal condition such as all-pin short circuit test etc. and hence most suitable for thin-screen TV which requires the high reliability.
●Features
1) High efficiency in all load area
2) 3.0A output current
3) PWM mode/PFM mode switch(automatic operation)
4) Low current mode/Rorripplmord switch with terminal MODE
5) Low RDS(ON) internal switches：75mΩ(typ.)
6) ±1% reference voltage accuracy
7) Programmable frequency : 250kHz-1MHz
（Can the adjustment by an external synchronization and the terminal RT resistance.）
8) Terminal RT OPEN/SHORT detecting function
9) Over current protection function
10) Output over voltage/low voltage protection function (over : FB > VREF +60mV , low : FB < VREF -60mV)
11) Timer off latch function in abnormal circumstances
12) Thermal shutdown function
13) Under voltage protection
14) Soft start/start delay circuit
15) Soft start time out function
16) Protecting BUS function with terminal PDET
17) HTSSOP-B20 package
Jul. 2008