LM5035 PWM Controller with Integrated Half-Bridge and SyncFET Drivers | TI.com

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PWM Controller with Integrated Half-Bridge and SyncFET Drivers


A new half-bridge controller


Integrates a fly-buck converter as auxiliary bias supply. Fully regulated pre-bias start-up. Enhanced CBC with high/low-side PWM pulse width matching function.


The LM5035 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 feedforward. The floating high-side gate driver is capable of operating with supply voltages up to 105 V. Both the high-side and low-side gate drivers are capable of 2-A peak. An internal high voltage start-up regulator is included, along with programmable line undervoltage lockout (UVLO) and overvoltage protection (OVP). The oscillator is programmed with a single resistor to frequencies up to 2 MHz. The oscillator can also be synchronized to an external clock. A current sense input and a programmable timer provide cycle-by-cycle current limit and adjustable hiccup mode overload protection.


  • 105-V, 2-A Half-Bridge Gate Drivers
  • Synchronous Rectifier-Control Outputs With
    Programmable Delays
  • High-Voltage (105-V) Start-up Regulator
  • Voltage Mode Control With Line Feedforward and
    Volt-Second Limiting
  • Resistor Programmed, 2-MHz Capable Oscillator
  • Patent Pending Oscillator Synchronization
  • Programmable Line Undervoltage Lockout
  • Line Overvoltage Protection
  • Internal Thermal Shutdown Protection
  • Adjustable Soft-Start
  • Versatile Dual Mode Overcurrent Protection With
    Hiccup Delay Timer
  • Cycle-by-Cycle Overcurrent Protection
  • Direct Optocoupler Interface
  • 5-V Reference Output


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Part number Order Topology Control method VCC (Min) (V) VCC (Max) (V) Frequency (Max) (kHz) UVLO thresholds on/off (V) Duty cycle (Max) (%) Gate drive (Typ) (A) Features Rating Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LM5035 Order now Half-Bridge     Feedforward
8     15     2000     Programmable/1.25V     50     2     Current Limiting
HV Start-up
Pre-Bias Start-Up
Synchronization Pin    
Catalog     -40 to 125     HTSSOP | 20
WQFN | 24    
20HTSSOP: 42 mm2: 6.4 x 6.5 (HTSSOP | 20)
24WQFN: 20 mm2: 4 x 5 (WQFN | 24)