LM5026 (正在供货)

有源钳位电流模式 PWM 控制器

有源钳位电流模式 PWM 控制器 - LM5026
数据表
 

描述

The LM5026 PWM controller contains all of the features necessary to implement power converters utilizing the active clamp and reset technique with current-mode control. With the active clamp technique, higher efficiencies and greater power densities can be realized compared to conventional catch winding or RDC clamp and reset techniques. Two control outputs are provided, the main power switch control (OUT_A) and the active clamp switch control (OUT_B). The device can be configured to control either a P-Channel or N-Channel clamp switch. The main gate driver features a compound configuration, consisting of both MOS and Bipolar devices, providing superior gate drive characteristics. The LM5026 can be configured to operate with bias voltages over a wide input range of 8 V to 100 V. Additional features include programmable maximum duty cycle, line undervoltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable timeout delay, PWM slope compensation, soft-start, 1-MHz capable oscillator with synchronization input and output capability, precision reference, and thermal shutdown.

特性

  • Current-Mode Control
  • Internal 100-V Start-Up Bias Regulator
  • 3-A Compound Main Gate Driver
  • High Bandwidth Optocoupler Interface
  • Programmable Line Undervoltage Lockout (UVLO)
    With Adjustable Hysteresis
  • Versatile Dual Mode Overcurrent Protection With
    Hiccup Delay Timer
  • Programmable Overlap or Deadtime between the
    Main and Active Clamp Outputs
  • Programmable Maximum Duty Cycle Clamp
  • Programmable Soft-Start
  • Leading Edge Blanking
  • Resistor Programmed 1-MHz Capable Oscillator
  • Oscillator Sync I/O Capability
  • Precision 5-V Reference

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参数 与其它产品相比 PWM 与谐振控制器

 
Topology
Control Method
Vin (Min) (V)
Vin (Max) (V)
Frequency (Max) (kHz)
UVLO Thresholds On/Off (V)
Duty Cycle (Max) (%)
Gate Drive (Typ) (A)
Features
Rating
Operating Temperature Range (C)
Pin/Package
LM5026 LM5025A LM5025B LM5025C
Active-Clamp Forward
Forward   
Active-Clamp Forward
Forward   
Active-Clamp Forward
Forward   
Active-Clamp Forward
Forward   
Current    Feedforward
Voltage   
Feedforward
Voltage   
Feedforward
Voltage   
13    13    13    13   
100    90    100    90   
1000    1000    1000    1000   
Programmable/1.25V    Programmable/2.5V    Programmable/2.5V    Programmable/2.5V   
80    80    73    91   
3    3    3    3   
Synchronization Pin    Current Limiting
Leading Edge Blanking
Soft Start
Thermal Shutdown   
Current Limiting
Leading Edge Blanking
Soft Start
Thermal Shutdown   
Current Limiting
Leading Edge Blanking
Soft Start
Thermal Shutdown   
Catalog    Catalog    Catalog    Catalog   
-40 to 125    -40 to 125    -40 to 125    -40 to 125   
16TSSOP
16WSON   
16TSSOP
16WSON   
16TSSOP
16WSON   
16TSSOP