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LM5170-Q1
- AEC-Q100 qualified for automotive applications:
- Device temperature grade 1: –40°C to +125°C ambient operating range
- Device HBM ESD classification level 2
- Device CDM ESD classification level C4B
- Functional Safety-Capable
- 100-V HV-port and 65-V LV-port max ratings
- 1% Accurate bidirectional current regulation
- 1% Accurate channel current monitoring
- 5-A Peak half-bridge gate drivers
- Programmable or adaptive dead-time control
- Programmable oscillator frequency with optional synchronization to external clock
- Independent channel enable control inputs
- Analog and digital channel current control inputs
- Programmable cycle-by-cycle peak current limit
- HV and LV port overvoltage protection
- Diode emulation prevents negative current
- Programmable soft-start timer
- MOSFET failure detect at start-up and circuit breaker control
- Multiphase operation phase adding or dropping
The LM5170-Q1 controller provides the essential high voltage and precision elements of a dual-channel bidirectional converter for automotive 48-V and 12-V dual battery systems. It regulates the average current flowing between the high voltage and low voltage ports in the direction designated by the DIR input signal. The current regulation level is programmed through analog or digital PWM inputs.
Dual-channel differential current sense amplifiers and dedicated channel current monitors achieve typical current accuracy of 1%. Robust 5-A half-bridge gate drivers are capable of driving parallel MOSFET switches delivering 500 W or more per channel. The diode emulation mode of the synchronous rectifiers prevents negative currents but also enables discontinuous mode operation for improved efficiency with light loads. Versatile protection features include cycle-by-cycle current limiting, overvoltage protection at both HV and LV ports, MOSFET failure detection and overtemperature protection.
Technical documentation
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View all 13 Design & development
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Evaluation board
LM5170EVM-BIDIR — LM5170 48V-12V Bidirectional Converter Evaluation Module
The LM5170EVM-BIDIR is a high performance dual phase bi-directional converter ideal for 48V-12V dual battery system applications. The two phases operate in 180degree interleaved operation, and they evenly share a max dc current of up to 60A. When DIR is set to "1" the power flows from (...)
Reference designs
PMP15038 — 50A, 0.05% Current Accuracy Power Reference Design for Battery Test Systems
This reference design introduces a large current, highly accurate and bi-directional power solution used in battery test systems (BTS). It includes a LM5170EVM-BIDIR and a signal control board. The LM5170EVM-BIDIR is an evaluation board to showcase the high performance of the dual-channel (...)
Reference designs
TIDA-01040 — Battery Tester Reference Design for High Current Applications
Li-Ion battery formation and electrical testing require accurate voltage and current control, usually to better than ±0.05% over the specified temperature range. This reference design proposes a solution for high-current (up to 50 A) battery tester applications supporting input (bus) (...)
Reference designs
TIDA-01041 — Battery tester reference design for multi-phase high-precision 0.5 to 100 A battery formation
This reference design provides a multi-phase solution for a wide range of current battery test applications. Leveraging the dual phase buck/boost controller LM5170's daisy chain configuration gives the design the ability to achieve 100A charging/discharging rates. Utilizing high accuracy constant (...)
Reference designs
TIDA-01042 — Modular battery tester reference design for 50-A, 100-A, and 200-A applications
This reference design provides a modular battery test solution allowing users to have the flexibility to test batteries at different current levels with one design. This design leverages the TIDA-01041 reference design by providing two 100-A battery testers that can work independently or be (...)
Reference designs
TIDA-01168 — Bidirectional DC/DC Converter Reference Design for 12-V/48-V Automotive Systems
The TIDA-01168 reference design is a four-phase, bidirectional DC-DC converter development platform for 12-V/48-V automotive systems. The system uses two LM5170-Q1 current controllers and a TMS320F28027F microcontroller (MCU) for the power stage control. LM5170-Q1 subsystems use average current (...)
Reference designs
PMP22396 — 2460-W bidirectional boost converter reference design for automotive applications
This reference design is a 2460-W bidirectional boost converter for automotive applications. The circuit is powered from the nominal 12-V battery to provide an output voltage of 48 V at 51.25 A. The design uses two dual-phase synchronous bidirectional controllers operating at a switching frequency (...)
Reference designs
PMP21943 — 48-V / 25-A negative-to-positive synchronous buck-boost reference design for power amplifiers
This reference design is a negative-to-positive synchronous buck-boost converter for power amplifier applications. The circuit is powered from the nominal -48-V system source to provide an output voltage of +48 V at 25 A. The design uses two dual synchronous boost controllers for 4-phase operation (...)
Reference designs
PMP21867 — 12-V / 100-A negative-to-positive synchronous buck-boost reference design for power amplifiers
This reference design is a negative-to-positive synchronous buck-boost converter for power amplifier applications. The circuit is powered from the nominal -48-V system source to provide an output voltage of +12 V at 100 A. The design uses two dual synchronous boost controllers for 4-phase (...)
Reference designs
PMP15035 — 1000-W, Bidirectional, 12-V to 12-V Converter Reference Design
This reference design is a dual-channel, bidirectional converter suitable for 12-V to 12-V, dual-battery system, automotive applications. This reference design has a wide input range (3 V to 40 V) and could give full load (1kW) in the input voltage from 9V to 18V by using two LM5170-Q1 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTQFP (PHP) | 48 | Ultra Librarian |
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