BM1051F
AC/DC用的功率因数校正转换器＋准谐振DC/DC转换器
BM1051F
AC/DC用的功率因数校正转换器＋准谐振DC/DC转换器
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。
主要规格
特性：
FET
-
Controller Type
PFC + QR
Vin1(Min.)[V]
8
Vin1(Max.)[V]
24
Start Circuit [V]
650
SW frequency(Max.)[kHz]
120
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
Package Size [mm]
15x7.8 (t=2.01)
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)
