LM5034

ACTIVE

100-V Dual Interleaved active clamp current mode controller with P-channel clamp FET

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Product details

Parameters

Topology Active-Clamp Forward, Flyback, Forward Control method Current VCC (Min) (V) 8 VCC (Max) (V) 15 Duty cycle (Max) (%) 76 UVLO thresholds on/off (V) Programmable/1.25V Frequency (Max) (kHz) 2000 Operating temperature range (C) -40 to 125 Gate drive (Typ) (A) 2.5 Features Current Limiting, HV Start-up, Soft Start, Supports PFET Clamp, Synchronization Pin Rating Catalog open-in-new Find other PWM controllers & resonant controllers

Package | Pins | Size

TSSOP (PW) 20 42 mm² 6.5 x 6.4 open-in-new Find other PWM controllers & resonant controllers

Features

  • Two Independent PWM Current Mode Controllers
  • Integrated High Voltage Startup Regulator
  • Compound 2.5A Main Output Gate Drivers
  • Single Resistor Oscillator Setting to 2 MHz
  • Synchronizable Oscillator
  • Active Clamp Gate Driver for P-Channel MOSFETs
  • Adjustable Gate Drive Overlap Time
  • Programmable Maximum Duty Cycle
  • Maximum Duty Cycle Fold-Back at High Line Voltage
  • Adjustable Timer for Hiccup Mode Current Limiting
  • Integrated Slope Compensation
  • Adjustable Line Under-Voltage Lockout
  • Independently Adjustable Soft-Start (Each Regulator)
  • Direct Interface with Opto-Coupler Transistor
  • Thermal Shutdown

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Description

The LM5034 dual current mode PWM controller contains all the features needed to control either two independent forward/active clamp dc/dc converters or a single high current converter comprised of two interleaved power stages. The two controller channels operate 180° out of phase thereby reducing input ripple current. The LM5034 includes a startup regulator that operates over a wide input range up to 100V and compound (bipolar + CMOS) gate drivers that provide a robust 2.5A peak sink current. The adjustable dead-time of the active clamp gate drivers and adjustable maximum PWM duty cycle reduce stress on the primary side MOSFET switches. Additional features include programmable line under-voltage lockout, cycle-by-cycle current limit, hiccup mode fault operation with adjustable restart delay, PWM slope compensation, soft-start, and a 2 MHz capable oscillator with synchronization capability.

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Technical documentation

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Type Title Date
* Datasheet LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp datasheet (Rev. A) Mar. 29, 2013
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
User guide AN-1370 LM5034 Evaluation Board (Rev. A) May 06, 2013
Application note Operation and Benefits of Active-Clamp Forward Power Converters Mar. 22, 2007

Design & development

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Hardware development

EVALUATION BOARD Download
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Description

LM5034 High Voltage Dual Interleaved Current Mode Controller with Active Clamp

Features
  • Two Independent PWM Current Mode
  • Integrated High Voltage Startup Regulator
  • Compound 2.5 A Main Output Gate Drivers
  • Single Resistor Oscillator Setting to 2 MHz
  • Synchronizable Oscillator
  • Active Clamp Gate Driver for P-Channel MOSFETs
  • Adjustable Gate Drive Overlap Time
  • Programmable Maximum Duty Cycle
  • Maximum (...)

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TSSOP (PW) 20 View options

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