LM5041 Cascaded PWM Controller | TI.com

LM5041 (ACTIVE) Cascaded PWM Controller

Cascaded PWM Controller - LM5041
Datasheet
 

Description

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.

Features

  • 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

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Parametrics

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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)
LM5041 Order now Push-Pull     Current
Voltage    
8     15     1000     Programmable/2.5V     50     1.5     Current Limiting
Programmable Soft Start
Synchronization Pin    
Catalog     -40 to 125     TSSOP | 16
WSON | 16    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM5041A Order now Push-Pull     Current
Voltage    
8     15     1000     Programmable/2.5V     50     1.5     Current Limiting
Programmable Soft Start
Synchronization Pin    
Catalog     -40 to 125     TSSOP | 16
WSON | 16    
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)
16WSON: 25 mm2: 5 x 5 (WSON | 16)    
LM5041B Order now Push-Pull     Current
Voltage    
8     15     1000     Programmable/2.5V     50     1.5     Current Limiting
Programmable Soft Start
Synchronization Pin    
Catalog     -40 to 125     TSSOP | 16     16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)