The HA8503B is a family of a high performance Primary Side Regulation (PSR) power switch with high precision CV/CC control ideal for charger applications. In CV mode, The HA8502D adopts Multi Mode Control which uses the hybrid of AM (Amplitude Modulation) mode and (Frequency Modulation) FM mode to improve system efficiency and reliability. In CC mode, the IC uses PFM control with line and load CC compensation. The IC can achieve audio noise free operation and optimized dynamic response. The built-in Cable Drop Compensation (CDC) function can provide excellent CV performance. The HA8502D integrates functions and protections of Under Voltage Lockout (UVLO), VDD over Voltage Protection (VDD OVP), Cycle-by-cycle Current Limiting (OCP), Short Load Protection (SLP), and VDD Clamping. The HA8503B is available in DIP-7 package. Features HA8503B Typical Application  Integrated with 650V MOSFET  Multi Mode PSR Control  Audio Noise Free Operation for PSR  Optimized Dynamic Response for PSR  Low Standby Power <70mW  ±4% CC and CV Regulation  Programmable Cable Drop Compensation (CDC) in PSR CV Mode  Built-in AC Line & Load CC Compensation  Build in Protections:  Short Load Protection (SLP)  On-Chip Thermal Shutdown (OTP)  Cycle-by-Cycle Current Limiting  Leading Edge Blanking (LEB)  Pin Floating Protection  VDD UVLO, OVP & Clamp