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LM5041

ACTIVE

Cascaded PWM controller with Hiccup mode

Product details

Topology Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Current limiting, Programmable soft start, Synchronization pin UVLO thresholds on/off (V) Programmable/2.5V Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 1.5 Vin (max) (V) 15
Topology Push pull Control mode Current Duty cycle (max) (%) 50 Switching frequency (max) (kHz) 1000 Features Current limiting, Programmable soft start, Synchronization pin UVLO thresholds on/off (V) Programmable/2.5V Operating temperature range (°C) -40 to 125 Rating Catalog Gate drive (typ) (A) 1.5 Vin (max) (V) 15
TSSOP (PW) 16 32 mm² 5 x 6.4 WSON (NHQ) 16 25 mm² 5 x 5
  • Internal Start-up Bias Regulator
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Current Mode Control
  • Internal Error Amplifier with Reference
  • Dual Mode Over-Current Protection
  • Leading Edge Blanking
  • Programmable Push-Pull Overlap or Dead Time
  • Internal 1.5A Push-Pull Gate Drivers
  • Programmable Soft-start
  • Programmable Oscillator with Sync Capability
  • Precision Reference
  • Thermal Shutdown

Packages

  • TSSOP-16
  • WSON-16 (5x5 mm) Thermally Enhanced

All trademarks are the property of their respective owners.

  • Internal Start-up Bias Regulator
  • Programmable Line Under-Voltage Lockout (UVLO) with Adjustable Hysteresis
  • Current Mode Control
  • Internal Error Amplifier with Reference
  • Dual Mode Over-Current Protection
  • Leading Edge Blanking
  • Programmable Push-Pull Overlap or Dead Time
  • Internal 1.5A Push-Pull Gate Drivers
  • Programmable Soft-start
  • Programmable Oscillator with Sync Capability
  • Precision Reference
  • Thermal Shutdown

Packages

  • TSSOP-16
  • WSON-16 (5x5 mm) Thermally Enhanced

All trademarks are the property of their respective owners.

The LM5041 PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These “Cascaded” topologies are well suited for multiple output and higher power applications. The LM5041’s four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either a specified overlap time (for current-fed applications) or a specified both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041 includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown.

The LM5041 PWM controller contains all of the features necessary to implement either current-fed or voltage-fed push-pull or bridge power converters. These “Cascaded” topologies are well suited for multiple output and higher power applications. The LM5041’s four control outputs include: the buck stage controls (HD and LD) and the push-pull control outputs (PUSH and PULL). Push-pull outputs are driven at 50% nominal duty cycle at one half of the switching frequency of the buck stage and can be configured for either a specified overlap time (for current-fed applications) or a specified both-off time (for voltage-fed applications). Push-pull stage MOSFETs can be driven directly from the internal gate drivers while the buck stage requires an external driver such as the LM5102. The LM5041 includes a high-voltage start-up regulator that operates over a wide input range of 15V to 100V. The PWM controller is designed for high-speed capability including an oscillator frequency range up to 1 MHz and total propagation delays of less than 100ns. Additional features include: line Under-Voltage Lockout (UVLO), soft-start, an error amplifier, precision voltage reference, and thermal shutdown.

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Technical documentation

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Type Title Date
* Data sheet LM5041 Cascaded PWM Controller datasheet (Rev. D) 25 Mar 2013
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
EVM User's guide AN-1299 LM5041 Evaluation Board (Rev. A) 06 May 2013
Application note DC - DC Converter Featuring the Cascaded Power Converter Topology 21 Mar 2007
White paper Communications System Power Supply Designs 01 Jan 2004

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM5041EVAL — Cascaded PWM Controller

LM5041 Cascaded PWM Controller

User guide: PDF
Not available on TI.com
Simulation model

LM5041 TINA-TI Reference Design

SNVM423.TSC (613 KB) - TINA-TI Reference Design
Simulation model

LM5041 TINA-TI Transient Spice Model

SNVM424.ZIP (28 KB) - TINA-TI Spice Model
Simulation model

LM5041 Unencrypted PSpice Transient Model Package (Rev. A)

SNVM422A.ZIP (53 KB) - PSpice Model
Package Pins Download
TSSOP (PW) 16 View options
WSON (NHQ) 16 View options

Ordering & quality

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