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Data sheet
LM5170
- Functional Safety-Capable
- Suited for high power industrial dual battery system
- 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
- Support multi-phase operation with stackability
- Diode emulation prevents negative current
- Programmability and flexibility
- Programmable or adaptive dead-time control
- Programmable oscillator frequency with optional synchronization to external clock
- Dual channel enable control inputs
- Analog and PWM current controls
- Programmable peak current limit
- Programmable soft-start timer
- Phase adding or dropping using EN2
- Integrated protection features
- HV and LV port over-voltage protection
- MOSFET failure detect at start-up and circuit breaker control
- Thermal shutdown
The LM5170 controller provides the essential high voltage and precision elements of a dual-channel bidirectional converter. 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 7 | Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LM5170 Multiphase Bidirectional Current Controller datasheet (Rev. B) | PDF | HTML | 11 Aug 2021 |
| White paper | 設計準確且多功能的鋰離子 電池測試解決方案 | 10 Nov 2020 | ||
| White paper | Designing an Accurate, Multifunction Lithium-Ion Battery-Testing Solution | 24 Sep 2020 | ||
| Functional safety information | LM5170 and LM5170-Q1 Functional Safety, FIT Rate, and Failure Mode Distribution | 22 May 2020 | ||
| Technical article | Achieving highly accurate full-scale charge and discharge current control for high | PDF | HTML | 13 Aug 2018 | |
| EVM User's guide | LM5170-Q1 EVM User's Guide (Rev. A) | PDF | HTML | 05 Dec 2016 | |
| Application note | U-140 Average Current Mode Control of Switching Power Supplies | 05 Sep 1999 |
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 (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| HTQFP (PHP) | 48 | Ultra Librarian |
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