Texas Instruments LM5171 | Demoboard PMP41079

Description

This reference design showcases a 450W dual-phase staggered boost converter reference design for Class H audio amplifier applications. To power an external audio amplifier, the controller is able to track the Class H control signal from the amplifier and generate an output voltage that tracks the amplitude of the speaker. As a result, minimal overall power consumption and loss can be achieved.

Features

• Functional Safety-Capable
• 85V HV-port and 80V LV-port max ratings
• 1% Typical accuracy of bidirectional current regulation
• 1% Typical accuracy of channel current monitoring
• I2C interface for monitoring and diagnosis
• Built-in 3.5V 1% reference voltage
• Integrated 5V 10mA bias supply
• 5A peak half-bridge gate drivers
• Programmable or adaptive dead-time control
• Programmable oscillator frequency up to 1MHz with optional synchronization to external clock
• Independent channel enabling control inputs
• Integrated both current and voltage loop control
• Programmable cycle-by-cycle peak current limit
• Over-temperature shutdown
• HV and LV port overvoltage protection
• Dynamically selectable diode emulation and forced PWM operation modes
• Programmable soft-start timer
• Support both multiphase and independent channel operations
• Support urgent shutdown latch

Typical applications

• Battery Testing System (BTS), Super-cap or battery backup power converter
• Boost Converter

More information

• Datasheet
• IC product information