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AC/DC用的功率因数校正转换器+准谐振DC/DC转换器_BM1051F

BM1051F是组合了应对高次谐波的功率因数校正(Power Factor Correction)转换器(以下简称PFC部)与DC/DC转换器(以下简称DC/DC部)的复合LSI。DC/DC部采用准谐振方式动作,有助于实现低EMI。BM1051F内置650V耐压启动电路。PFC部、DC/DC部均外接开关MOSFET及电流检测电阻,可实现自由度高的电源设计。PFC部采用峰值电流控制。利用带AC电压过低补偿电路的乘法器、应对负载变动的电路、最大功率补偿电路等各种保护电路,提供合适的应用方案。DC/DC部的准谐振方式为软开关动作,有助于实现低EMI。内置脉冲串模式,可降低轻负载时的功耗。内置了软启动功能、脉冲串功能、逐周期过电流限制、过电压保护、过负荷保护等各种保护功能。与微控制器间设有通信控制用端子、外部停止端子,可提供适用于各种应用的系统方案。

* 本产品是标准级的产品。本产品不建议使用的车载设备。
型号
Status
封装
包装数量
最小独立包装数量
包装形态
RoHS
BM1051F-GE2 供应中 SOP24 2000 2000 Taping Yes
 
特性:
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
特点:
    • Quasi-resonant circuit + PFC circuit
    • Built-in HV Starter circuit
    • Low consumption current (typ.10µA) when starter circuit is OFF.
    • Quasi resonant circuit
      • Max operating frequency (120kHz)
      • Frequency reduction function
      • Over-current limiting variable function
      • Pulse-by-pulse over-current protection circuit
      • Built-in Soft start
      • Voltage protection function (brown out) during low input
      • ZT pin Over Voltage Protection
      • Output overload protection (auto recovery /latch switching enabled)
      • 250nsec Leading-Edge Blanking
    • Power Factor Correction circuit
      • Peak current control (65kHz)
      • Per-cycle over current protection circuit
      • Maximum power revision
      • the multiplier with a revision circuit when the AC voltage falls the load change measure circuit
    • Selectable protection method by LATCH/AUTOR terminal.
      • LATCH/AUTOR=H : Latch
      • LATCH/AUTOR=L : Auto recovery
    • External stop function (COMP pin)
    • AC input voltage stop detected function (ACDET)
    • Built-in PFC stop terminal (PFCON/OFF)
 
 
 
 
技术信息
Application Note

Thermal Resistance