Overview
The LM5170PHPR, manufactured by Texas Instruments, is a multiphase bidirectional current controller designed for high-power industrial applications. This controller is integral to dual-channel bidirectional converters, regulating the average current flow between high voltage (HV) and low voltage (LV) ports. The direction of current flow is controlled by the DIR input signal, and the current regulation level can be programmed through either analog or digital PWM inputs. The LM5170 is housed in a 48-pin HTQFP (PHP) package and operates over a temperature range of -40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | HTQFP (PHP) | - |
| Pins | 48 | - |
| Operating Temperature Range | -40 to 125 | °C |
| HV-Port Max Rating | 100 | V |
| LV-Port Max Rating | 65 | V |
| Current Regulation Accuracy | 1% | - |
| Channel Current Monitoring Accuracy | 1% | - |
| Peak Half-Bridge Gate Drivers | 5 A | - |
| Oscillator Frequency Range | 50 kHz to 500 kHz | - |
| Programmable Dead Time | 15 ns to 200 ns | - |
| Junction-to-Ambient Thermal Resistance | 25.1 °C/W | - |
Key Features
- Functional Safety-Capable: Documentation available to aid in functional safety system design.
- Suited for high power industrial dual battery systems with 100-V HV-port and 65-V LV-port max ratings.
- 1% accurate bidirectional current regulation and channel current monitoring.
- 5-A peak half-bridge gate drivers capable of driving parallel MOSFET switches delivering 500 W or more per channel.
- Support for multi-phase operation with stackability.
- Diode emulation prevents negative current and enables discontinuous mode operation for improved efficiency with light loads.
- 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 and soft-start timer.
- Phase adding or dropping using EN2.
- Integrated protection features:
- HV and LV port over-voltage protection.
- MOSFET failure detection at start-up and circuit breaker control.
- Thermal shutdown).
Applications
- Battery testers.
- Bi-directional battery management systems).
- Backup battery powered converters).
- Stackable buck or boost converters).
- Negative to positive voltage converters).
Q & A
- What is the primary function of the LM5170 controller?
The LM5170 controller regulates the average current flowing between the high voltage and low voltage ports in a dual-channel bidirectional converter, controlled by the DIR input signal).
- What are the maximum voltage ratings for the HV and LV ports?
The HV port has a maximum rating of 100 V, and the LV port has a maximum rating of 65 V).
- What is the accuracy of the bidirectional current regulation and channel current monitoring?
Both the bidirectional current regulation and channel current monitoring have an accuracy of 1%).
- What is the peak current capability of the half-bridge gate drivers?
The half-bridge gate drivers can handle a peak current of 5 A).
- Does the LM5170 support multi-phase operation?
Yes, the LM5170 supports multi-phase operation with stackability).
- What protection features are integrated into the LM5170?
The LM5170 includes HV and LV port over-voltage protection, MOSFET failure detection, circuit breaker control, and thermal shutdown).
- How can the oscillator frequency be controlled?
The oscillator frequency can be programmed and optionally synchronized to an external clock).
- What is the purpose of the diode emulation mode?
The diode emulation mode prevents negative current and enables discontinuous mode operation for improved efficiency with light loads).
- Can the LM5170 be used in functional safety applications?
Yes, the LM5170 is functional safety-capable, with documentation available to aid in functional safety system design).
- What are some common applications of the LM5170?
Common applications include battery testers, bi-directional battery management systems, backup battery powered converters, stackable buck or boost converters, and negative to positive voltage converters).
