SNVS428H January   2006  – October 2015 LM5035

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  High-Voltage Start-Up Regulator
      2. 7.3.2  Line Undervoltage Detector
      3. 7.3.3  Line Overvoltage, Load Overvoltage, Remote Thermal Protection
      4. 7.3.4  Reference
      5. 7.3.5  Cycle-by-Cycle Current Limit
      6. 7.3.6  Overload Protection Timer
      7. 7.3.7  Soft-Start
      8. 7.3.8  Soft-Stop
      9. 7.3.9  PWM Comparator
      10. 7.3.10 Feedforward Ramp and Volt-Second Clamp
      11. 7.3.11 Oscillator, Sync Capability
      12. 7.3.12 Gate-Driver Outputs (HO and LO)
      13. 7.3.13 Synchronous Rectifier Control Outputs (SR1 and SR2)
      14. 7.3.14 Thermal Protection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 VIN
        2. 8.2.2.2 For Applications >100 V
        3. 8.2.2.3 Current Sense
        4. 8.2.2.4 HO, HB, HS, and LO
        5. 8.2.2.5 Programmable Delay (DLY)
        6. 8.2.2.6 UVLO and OVP Voltage Divider Selection for R1, R2, and R3
        7. 8.2.2.7 Fault Protection
        8. 8.2.2.8 HICCUP Mode Current-Limit Restart (RES)
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • 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

2 Applications

  • Industrial Power Converters
  • Telecom Power Converters

3 Description

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.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM5035 HTSSOP PowerPAD™ (20) 6.50 mm × 4.40 mm
WQFN (24) 5.00 mm × 4.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplied Application Diagram

LM5035 20177501.gif