Internal structure/features/typical applications of PWM control IC ME8263

ME8263 is a high-performance PWM modulated power management IC. This chip is an AC/DC switching power supply controller specially designed for cost-effective small and medium power power adapters. ME8263 has lower standby power consumption, lower EMI (with frequency jitter) and higher efficiency.

ME8263 contains 5V built-in power supply circuit, reference circuit, oscillator circuit, feedback circuit, frequency jitter circuit, leading edge blanking circuit, MOS tube drive circuit, overvoltage protection circuit, overload protection circuit, and PWM control circuit.

ME8263 Pin Description

ME8263 package pin diagram

Features and advantages of ME8263

The startup current of ME8263 is as low as 1uA, which can effectively reduce the loss of the system startup circuit and shorten the system startup time.

The built-in frequency jitter design of ME8263 can effectively improve the EMI characteristics of the system and reduce the EMI cost of the system.

When the system is working at no load or light load, ME8263 enters the intermittent working mode, effectively reducing the power consumption of the system at no load and light load.

ME8263 has a built-in slope compensation circuit, which can effectively improve the loop stability in continuous mode, prevent harmonic oscillation, and reduce output ripple.

ME8263 adopts totem structure drive output, which can directly drive MOSFET. At the same time, the chip also has a built-in 18V drive output clamp circuit to prevent the gate of MOSFET from being broken down due to excessive system drive output voltage for some reason. In addition, the chip is designed to optimize the drive with soft drive to improve system EMI.

ME8263 has built-in LEB leading edge blanking function, which can save an external RC network for the system and reduce system cost.

ME8263 integrates a complete set of protection function modules, including: loop current limiting (OCP), overload protection (OLP), input overvoltage clamping, drive overvoltage clamping, undervoltage lockout (UVLO), etc.

Internal structure diagram of ME8263

Typical application solutions of ME8263

ME8263 can be widely used in various small and medium power AC/DC switching power supply solutions, such as set-top box power supply, low power PC power supply, etc.

ME8263 Typical Application Circuit