LM5046 Phase-shifted full-bridge PWM controller with integrated MOSFET drivers | TI.com

LM5046 (ACTIVE) Phase-shifted full-bridge PWM controller with integrated MOSFET drivers

 

Description

The LM5046 PWM controller contains all of the features necessary to implement a phase-shifted full-bridge topology power converter using either current mode or voltage mode control. This device is intended to operate on the primary side of an isolated DC-DC converter with input voltage up to 100 V. This highly integrated controller-driver provides dual 2-A high- and low-side gate drivers for the four external bridge MOSFETs, plus control signals for the secondary-side synchronous rectifier MOSFETs. External resistors program the dead-time to enable zero-volt switching of the primary FETs. Intelligent startup of the synchronous rectifiers allows monotonic turnon of the power converter even with prebias load conditions. Additional features include cycle-by-cycle current limiting, hiccup mode restart, programmable soft-start, synchronous rectifier soft-start, and a 2-MHz capable oscillator with synchronization capability and thermal shutdown.

Features

  • Highest Integration Controller for Small
    Form Factor, High-Density Power Converters
  • High-Voltage Start-Up Regulator
  • Intelligent Sync Rectifier Start-Up Allows
    Linear Turn-on into Prebiased Loads
  • Synchronous Rectifiers Disabled in UVLO Mode
    and Hiccup Mode
  • Two Independent, Programmable Dead-Time
    Adjustments to Enable Zero-Volt Switching
  • Four High-Current 2-A Bridge Gate Drivers
  • Wide-Bandwidth Opto-Coupler Interface
  • Configurable for Either Current Mode or Voltage
    Mode Control
  • Dual-Mode Overcurrent Protection
  • Resistor Programmed 2-MHz Oscillator
  • Programmable Line UVLO and OVP

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)
LM5046 Order now Phase-Shifted Full-Bridge     Current
Voltage    
10     14     1000     Programmable/1.25V     100     1.5
2    
Adjustable Switching Frequency
Current Limiting
Error Amplifier
HV Start-up
SR Logic
Soft Start
Soft Switching    
Catalog     -40 to 125     HTSSOP | 28
WQFN | 28    
28HTSSOP: 43 mm2: 4.4 x 9.7 (HTSSOP | 28)
28WQFN: 25 mm2: 5 x 5 (WQFN | 28)    
UCC2895 Order now Phase-Shifted Full-Bridge     Current
Feedforward
Voltage    
10     16.5     1000     11/9     100     0.1     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology
Soft Start
Soft Switching
Synchronization Pin    
Catalog     -40 to 85     PDIP | 20
SOIC | 20
TSSOP | 20    
See datasheet (PDIP)
20SOIC: 132 mm2: 10.3 x 12.8 (SOIC | 20)
20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)    
UCC28950 Order now Phase-Shifted Full-Bridge     Current
Voltage    
8     17     1000     7.3/6.75     95     0.2     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Light Load Efficiency
Multi-topology
SR Logic
Soft Start
Soft Switching
Synchronization Pin    
Catalog     -40 to 125     TSSOP | 24     24TSSOP: 34 mm2: 4.4 x 7.8 (TSSOP | 24)    
UCC28951 Order now Phase-Shifted Full-Bridge     Current
Peak Current Mode
Voltage    
8     17     1000     7.3/6.7     97     0.2     Adjustable Switching Frequency
Current Limiting
Enable/Shutdown
Error Amplifier
Green Mode
Light Load Efficiency
Programmable Slope Compensation
Soft Start
Soft Switching
Synchronization Pin
Thermal Shutdown    
Catalog     -40 to 125     TSSOP | 24     24TSSOP: 34 mm2: 4.4 x 7.8 (TSSOP | 24)    
UCC3895 Order now Phase-Shifted Full-Bridge     Current
Feedforward
Voltage    
10     16.5     1000     11/9     100     0.1     Adjustable Switching Frequency
Current Limiting
Error Amplifier
Multi-topology
Soft Start
Soft Switching
Synchronization Pin    
Catalog     0 to 70     PDIP | 20
SOIC | 20
TSSOP | 20    
See datasheet (PDIP)
20SOIC: 132 mm2: 10.3 x 12.8 (SOIC | 20)
20TSSOP: 42 mm2: 6.4 x 6.5 (TSSOP | 20)