Quasi-Resonant Control DC/DC converter and Power Factor Correction converter IC for AC/DC Converter - BM1051F
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, overvoltage 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 thatcan be adapted for various applications.
| Part Number | Status | Package | Unit Quantity | Minimum Package Quantity | Packing Type | RoHS |
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| BM1051F-GE2 | Active | SOP24 | 2000 | 2000 | Taping | Yes |
BM1051F Data Sheet
Specifications| FET | - | | Controller Type | PFC + QR | | Vin1(Min.)[V] | 8.0 | | Vin1(Max.)[V] | 24.0 | | Start Circuit [V] | 650.0 | | SW frequency(Max.)[KHz] | 120.0 | | Vcc OVP | Auto Restart / Latch | | BR PIN | Yes | | Channel | 1 | | Light Load mode | Yes | | EN | No | | Soft Start | Yes | | Under Voltage Lock Out | Yes | | Operating Temperature (Min.)[°C] | -40 | | Operating Temperature (Max.)[°C] | 85 |
| Technical DocumentsFeatures- Quasi-resonant circuit + PFC circuit
- Built-in HV Starter circuit
- Low consumption current (typ.10µA) when starter circuit is OFF.
- Quasi resonant circuit
- Power Factor Correction circuit
- Selectable protection method by LATCH/AUTOR terminal.
- External stop function (COMP pin)
- AC input voltage stop detected function (ACDET)
- Built-in PFC stop terminal (PFCON/OFF)
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