临界模式控制 功率因数校正控制器IC_BD7691FJ
作为AC/DC用功率因数校正转换器（Power Factor Correction: PFC），本产品为所有需要改善功率因数的产品提供优良系统。PFC部采用临界模式（BCM），可通过Zero Current Detection降低开关损耗和噪声。采用基于电阻的零电流检测方式，无需ZCD用辅助绕组。
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特性：
FET
-
Controller Type
PFC
Vin1(Min.)[V]
10.0
Vin1(Max.)[V]
26.0
SW frequency(Max.)[kHz]
220.0
BR PIN
-
Channel
1
Light Load mode
No
EN
No
Thermal Shut-down
Yes
Under Voltage Lock Out
Yes
Operating Temperature (Min.)[°C]
-40
Operating Temperature (Max.)[°C]
105
特点：
- Boundary Conduction Mode
- Low Power consumption
- VCCUVLO
- Resister detection for ZCD
- Switching loss reduction, noise reduction by ZCD
- Improving the efficiency by the max frequency control
- Dynamic and Static OVP by the VS pin
- High accuracy over current detection (±4%)
- Error amplifier input short protection
- Stable MOSFET gate drive by the Clamper
- Protection function by the OVP pin
