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Product Detailed Parameters
- Description：80-V DUAL-CHANNEL BIDIRECTIONAL
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Type：Transistor Driver
- Function：Step-Up, Step-Down, Step-Up/Step-Down
- Output Configuration：Positive
- Topology：Buck, Boost, Buck-Boost
- Number of Outputs：2
- Output Phases：3
- Voltage - Supply (Vcc/Vdd)：3V ~ 80V
- Frequency - Switching：50kHz ~ 1MHz
- Duty Cycle (Max)：-
- Synchronous Rectifier：Yes
- Clock Sync：Yes
- Serial Interfaces：I2C
- Control Features：Current Limit, Dead Time Control, Enable, Frequency Control, Phase Control, Ramp, Soft Start
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：48-PowerTQFP
- Supplier Device Package：48-HTQFP (7x7)
- Grade：-
- Qualification：-
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Overview
The LM5171PHPR is a dual-channel bidirectional buck-boost controller from Texas Instruments, designed for automotive applications. It operates within an input voltage range of 6 V to 85 V and supports switching frequencies between 50 kHz and 500 kHz. The device features a maximum duty cycle of 99% and handles output voltages from 100 mV to 100 V with up to 50 A output current capability. It is housed in a 48-HTQFP package and functions within a temperature range of -40°C to 125°C.
Feature Summary
- Supports bidirectional power flow for dual-channel buck and boost topologies
- Enables precise multiphase control with adjustable switching frequency
- Includes integrated protection mechanisms for robust operation
Applications
- Automotive battery management systems
- Dual-battery micro-hybrid (mHEV) architectures
- Bidirectional DC-DC conversion stages
Procurement Notes
Verify the specific suffix PHPR against the official datasheet to confirm the tape-and-reel packaging configuration. Ensure the component meets the required automotive qualification standards for your target application environment. Cross-reference the manufacturer's latest documentation to confirm availability status and any potential obsolescence notices before finalizing procurement plans.
Selection Notes
Select this controller when designing systems requiring isolated or non-isolated bidirectional energy transfer between two voltage domains. It is suitable for applications needing high efficiency across wide input voltage ranges. Consider the thermal performance of the HTQFP package and ensure adequate PCB layout for high-current paths to maintain stability and reliability under varying load conditions.
Part Context
This component belongs to the LM517x family of synchronous buck-boost controllers. It shares architectural similarities with the LM5170 but offers specific optimizations for automotive-grade reliability. The device integrates gate drivers and control logic to manage external N-channel MOSFETs, simplifying the design of complex power conversion stages in demanding environments.
Replacement Considerations
The LM5170PHPR serves as a primary alternative within the same product family. Verify pin compatibility and electrical parameter alignment before substitution.
