OB2007是高性能和高
集成二次侧同步
整流控制器用于二次侧
整流开关模式电源系统。
它使更低的电压降n沟道
MOSFET模仿传统的二极管整流器
二次侧的回扫的转换器,该转换器
可以减少散热,增加输出
目前的能力和效率,简化
热设计。它可以广泛的支持
系统输出电压3 v ~ 21。
适用于多个模式应用程序
包括不连续导电模式(DCM),
准谐振模式(QR)和连续的
导通模式(CCM)。的drain-to-source
SR MOSFET的电压控制的感觉
SR MOSFET的打开或关闭。此外,为了
进一步减少SR下降时间,软门
实现OB2007,拉下来
在关闭之前的栅电压水平
彻底。
OB2007提供SOT23-6包。
特性
二次侧同步
OB2007 is a high performance and highly
integrated secondary side synchronous
rectification controller used for secondary side
rectification in switch mode power supply system.
It drives a much lower voltage drop N-channel
MOSFET to emulate the traditional diode rectifier
at the secondary side of flyback converter, which
can reduce heat dissipation, increase output
current capability and efficiency, and simplify
thermal design. It can support wide range of
system output voltage 3V~21V.
It is suitable for multiple mode applications
including discontinuous conduction mode (DCM),
quasi-resonant mode (QR) and continuous
conduction mode (CCM). The drain-to-source
voltage of SR MOSFET is sensed to control the
turn on and off of the SR MOSFET. In addition, to
reduce SR falling time further, soft gate is
implemented in OB2007, which would pull down
the gate voltage level before being turned off
thoroughly.
OB2007 is offered in SOT23-6 package.
FEATURES
Secondary-side synchronous rectification
controller for 3V~21V output system
Up to 180V VD pin high voltage tolerance
Self-supplying for operation without the use of
an auxiliary winding
Suitable for DCM, QR and CCM operation
Soft gate drive for fast turn-off
Accurate secondary side MOSFET Vds
sensing
Adaptive off time control effectively avoid the
ring impact induced by parasitic elements
3A/2A peak current sink/source driver
capability
VDD UVLO protection
APPLICATIONS
AC/DC 3V~21V adaptors
Low voltage rectification circuits
