NS公司的LM5035A是集成了半橋和SyncFET驅動器的PWM控制器,包括了采用電壓模式控制來實現(xiàn)半橋拓撲功率轉換器所需的所有特性,具有105V/2A半橋柵極驅動器,有可編延遲的同步整流器控制輸出,電阻編程的2MHz振蕩器,可調整軟起動,5V基準輸出.本文介紹了LM5035A主要特性,方框圖,簡化的應用框圖和LM5035A評估板的主要特性,應用電路圖和材料清單.LM5035A:PWMControllerwithIntegratedHalf-BridgeandSyncFETDriversTheLM5035AHalf-BridgeContr
NS 公司的LM5035A是集成了半橋和SyncFET驅動器的PWM控制器,包括了采用電壓模式控制來實現(xiàn)半橋拓撲
功率轉換器所需的所有特性,具有
105V/2A半橋柵極驅動器,有可編延遲的同步
整流器控制輸出,
電阻編程的2MHz振蕩器,可調整軟起動,5V基準輸出.本文介紹了LM5035A主要特性,方框圖, 簡化的應用框圖和LM5035A評估板的主要特性,應用電路圖和材料清單.
LM5035A: PWM C
ontroller with Integrated Half-Bridge and SyncFET Drivers
The LM5035A Half-Bridge Controller/Gate Driver contains all of the features necessary to implement half-bridge topology power converters using voltage mode control with line voltage feed-forward. The LM5035A is a functional variant of the LM5035 half-bridge PWM controller. The VCC current limit threshold h
asbeen increased to 35 mA. The soft start and soft start currents have been increased from 50 &
mu;A to 100 μA. The BST UV threshold has been lowered to less than the VCC UV threshold. The ratio of the T1 and T2 delays on the SR1 and SR2 outputs has been increased from 2:1 to 3:1. The floating high-side gate driver is capable of operating with supply voltages up to 105V. Both the high-side and low-side gate drivers are capable of 2A peak. An internal high voltage startup regulator is included, along with programmable line undervoltage lockout (UVLO) and overvoltage protection (OVP).
