辛知勋
Application Note AN42009 (ML AN33)
上海插画培训班ML4824 Combo Controller Applicationseffort
icg
General Description
This Application Note shows the step-by-step process to design a high performance supply. The equations shown in this document can also be ud for different output voltages and total power.
展览路一小The complete power supply circuit shown in Figure 6 dem-onstrates the ML4824’s ability to manage high output power while easily complying with international requirements regarding AC line quality. The PFC ction provides 380V DC to a dual transistor current-mode forward converter. The out-put of the converter delivers +12V at up to 16 amps. The cir-cuit operates from 80 to 264V AC with both power ctions switching at 100kHz.
The PFC Stage
Powering the ML4824
The ML4824 is initialized once C 30 is charged to 13V
through R 27 and R 30 . PFC switching action now boosts the voltage on C 5 to 380V via T 1’s primary inductance. T 1 then supplies a well regulated 13V for the ML4824 from its c-ondary winding and full wave rectifier consisting of D 3 , D 4 , C 10 and C 11 . T 1’s primary to condary turns ratio (N PRI /N SEC ) is 25.5:1. For proper circuit operation, high fre-quency bypassing with low ESR ceramic or film capacitors on V CC and V REF is provided. Orderly PFC operation upon start-up is guaranteed when D 2 quick charges the boost
capacitor to the peak AC line voltage before the boost switch
款式英语
Figure 1. The PFC Stage
AN42009APPLICATION NOTE
APPLICATION NOTE AN42009上海复旦大学自考网
高考英语2020
AN42009APPLICATION NOTE
APPLICATION NOTE AN42009
站在烦恼里仰望幸福
>小托福
