LM5039数据手册集成电路（IC）的DC-DC开关控制器规格书PDF

描述 Description

The LM5039 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 LM5039 is a functional variant of the LM5035B half-bridge PWM controller, featuring average current limit during an overload event to balance the center-point of the half-bridge capacitor divider. 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). The oscillator is programmed with a single resistor to frequencies up to 2MHz. The oscillator can also be synchronized to an external clock. A current sense input provides peak cycle-by-cycle and average current limit. Other features include adjustable hiccup mode overload protection, soft-start, revision reference, and thermal shutdown.

特性 Features

• 105V / 2A Half-Bridge Gate Drivers
• Synchronous Rectifier Control Outputs with Programmable Delays
• High Voltage (105V) Start-up Regulator
• Voltage-mode Control with Line Feed-Forward and Volt
• Second Limiting
• Programmable Average Current Limit Balances the Half-Bridge Capacitor Divider Voltage in an Overload Condition
• Programmable Hiccup Mode Timer Reduces Power Dissipation During a Continuous Overload Event
• Adjustable Peak Cycle-by-Cycle Over Current Protection
• Resistor Programmed, 2MHz Capable Oscillator
• Patented Oscillator Synchronization
• Programmable Line Under-Voltage Lockout
• Internal Thermal Shutdown Protection
• Adjustable Soft-Start
• Direct Opto-Coupler Interface
• 5V Reference Output
Packages
• HTSSOP-20 (Thermally enhanced)
• WQFN-24 (4mm x 5mm)