Datasheet
Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC for AC/DC Converter
BM1051F
...
Datasheet
Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC for AC/DC Converter
BM1051F
●General Description
BM1051F is compounded LSI of Power Factor Correction converter (PFC) for harmonic solution and DC/DC converter (DC/DC). Because DC/DC operates on Quasi-resonant method, DC/DC contributes to Low EMI. BM1051F built in a HV starter circuit that tolerates 650V. Because of putting the current sense resistors externally both the PFC part and the DC/DC part, IC enables power supply design free.
In the PFC part, IC adopts peak current control operation. Suitable application is proposed by a various protection circuit, such as the multiplier with a revision circuit on the AC
voltage falls, the load regulation revision circuit, and the maximum power feed-forward circuit, etc.
The Quasi-resonant system of a DC/DC part contributes to low EMI because PFC operates by soft switching. A burst mode is built in, so the power is reduced at light load. Various protection functions, such as a soft start function, a burst function, an over-current limiting for every cycle, over
voltage protection, and over current protection, are built in. The pin for communicated control with a controller and the external stop pin are prepared; it proposes the system that can be adapted for various applications.
●Basic specifications Operating Power Supply
Voltage Range: VCC:8.0 to 24.0V Operating Current: QR ON (PFC OFF):1.20mA(pulse on)
QR ON (PFC OFF):1.00mA(pulse off...