KP3212B

Integrated with 650V Power MOSFET and HV Startup Circuit

Optimize Audible  Noise,  Improve System Stability

Multi-Mode Control with Audio Noise Free Operation

Supports       Buck       and       Buck-Boost Topologies

Default 12V Output with FB floated

Less than 50mW Standby Power

Green Mode Operation for High Efficiency Good Line and Load Regulation

Built-in Soft Start

Build in Protections:

Over Load Protection (OLP)

Cycle-by-Cycle Current Limiting (OCP)

Output OVP

VDD OVP, UVLO & Clamp

Available with SOP-8 and DIP-8 Package

KP321XB_REV1.05_EN

KP321XB  family  is  a  high  performance  Switch Mode  Power  Supply Switcher for  low  power off- line   application   with   minimum   components   in typical buck solution. This family has built-in high break  down  voltage  MOSFET  to  withstand  high surge input.

 

Unlike conventional PWM control, there’s no fixed internal  clock  in  KP321XB  family  to  trigger  the GATE driver, the switching frequency is changed according to  the  load  condition.  The  multi-mode PWM control is integrated to simplify circuit design and achieve good line and load regulation without audio  noise  generated.  The  peak  current  limit changes  according to the  real  load condition for low standby power in no load.

 

KP321XB  integrates functions and  protections of Under  Voltage   Lockout  (UVLO),  Cycle-by-cycle Current   Limiting  (OCP),   Output  OVP,  On chip Thermal Shutdown, Over Load Protection (OLP), VDD  OVP with Auto  Recovery  Mode  Protection, etc.

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