一般的描述
OB2530P是高性能离线PSR权力
对低功率开关AC / DC充电器和适配器
应用程序。在一次侧感应
和监管。因此,opto-coupler和
TL431可以消除。专有的常数
电压(CV)和恒流控制(CC)
综合如下图所示。
在CC控制、电流和输出功率设置
可以调整外部的电阻
Rs在CS销。在简历控制、多模操作
利用实现高性能和高吗
效率。此外,良好的负载调整率
通过内置的电缆补偿。
设备运行在烤瓷CC模式在大负载
条件和在脉宽调制频率
减少在轻/中负载。芯片
消耗很低的操作电流。它实现了
少于75 mw备用电源以满足严格的
备用电源标准。
OB2530P提供全面的保护
覆盖自动恢复featur
GENERAL DESCRIPTION
OB2530P is a high performance offline PSR power
switch for low power AC/DC charger and adapter
applications. It operates in primary-side sensing
and regulation. Consequently, opto-coupler and
TL431 could be eliminated. Proprietary Constant
Voltage (CV) and Constant Current (CC) control is
integrated as shown in the figure below.
In CC control, the current and output power setting
can be adjusted externally by the sense resistor
Rs at CS pin. In CV control, multi-mode operations
are utilized to achieve high performance and high
efficiency. In addition, good load regulation is
achieved by the built-in cable drop compensation.
Device operates in PFM in CC mode at large load
condition and it operates in PWM with frequency
reduction at light/medium load. The chip
consumes very low operation current. It achieves
less than 75mW standby power to meet strict
standby power standard.
OB2530P offers comprehensive protection
coverage with auto-recovery feature including
Cycle-by-Cycle current limiting, VDD over voltage
protection, feedback loop open protection, short
circuit protection, built-in leading edge blanking,
VDD under voltage lockout (UVLO), OTP etc.
OB2530P is offered in DIP8 packages.
Figure.1. Typical CC/CV Curve
FEATURES
Primary-side sensing and regulation without
TL431 and opto-coupler
High precision constant voltage and current
regulation at universal AC input
Multi-mode PWM/PFM operation for efficiency
improving
Integrated 2A 620V MOSFET
Good dynamic response
Programmable CV and CC regulation
Built-in primary winding inductance
compensation
Programmable cable drop compensation
No need for control loop compensation
Audio noise free operation
Built-in leading edge blanking (LEB)
Ultra low start-up current and low operating
current
Comprehensive protection coverage with
auto-recovery
VDD over voltage protection
VDD under voltage lockout with
hysteresis (UVLO)
Cycle-by-Cycle current limiting
Feedback loop open protection
Output short circuit protection
On-chip OTP
APPLICATIONS
Low Power AC/DC offline SMPS for
Cell Phone Charger
Digital Cameras Charger
Small Power Adapter
Auxiliary Power for PC, TV etc.
Linear Regulator/RCC Replacement
