TI's TIDA-01168 is a four-phase bi-directional automotive 12V/48V power system reference design with two LM5170-Q1 current controllers and TMS320F28027F microcontroller (MCU), 12V input voltage range of 6V-18V, 48V input voltage range of 24V -54V, with reverse polarity, overcurrent and overvoltage and over temperature protection, multiphase upgradeable option, output power 2kW, efficiency 97%, mainly used in 12V/48V automotive power distribution, super capacitor or battery backup power converter . This article describes the main features of the LM5170-Q1, block diagram, 60A dual-phase 48V/12V bidirectional converter application circuit and reference design TIDA-01168 main features and system indicators, block diagram, circuit diagram, bill of materials and PCB design. The lm5170-q1 controller provides the necessary high precision automotive 48 V and 12 vdual battery system dual channelbidirecTIonal conversion components. It regulates the average current between the high voltage and low voltageports specified by the DIR input. The current regulatory level is programmed to analog or digital PWM inputs. Dual differential current sense amplifiers and dedicated channel current monitors achieve 1% typicalcurrent accuracy. Robust 5-A half-bridge gatedrivers are capable of driving parallel MOSFETswitches delivering 500 W or more per channel. Diode emulation mode of synchronous rectifiersprevents negative current also makes discontinuous mode operation efficiency increase light load. Multi-function protection function cycle-by-cycle current limit includecycle overvoltage protection, high voltage low voltage port, MOSFET fault detection over temperature protection. An innovative average current mode control schememaintains constant closed loop gain allows a single r-cnetwork to compensate for buck and boostconversion. The oscillator can be adjusted to 500 kHz to synchronize with an external clock. The multiphaseparallel operation is achieved by connecting the twolm5170-q1 controller 3 and four operations, or synchronizing multiple controller phase shifted clocks to a higher number of stages. Low state UVLO pin disables lm5170-q1 at low Current shutdown mode. 1• Comply with AEC-Q100 automotive applications: - Equipment temperature class 1:40 degrees to + 125 degree room temperature working range – ESD rating of device HBM 2 – Device CDM ESD classification level C4B • Maximum rating of 100-V high voltage ports and ports 65-v LV • 1% accurate bidirectional current regulation • 1% accurate channel current monitoring • 5-peak half-bridge gate driver • Programmable or adaptive dead time control • Programmable oscillator frequency with optionalsynchronization external clock • Independent channel enable control input • Analog and digital channel current control inputs • Programmable cycle-by-cycle peak current limit • High voltage and low voltage port overvoltage protection • Diode analog to prevent negative current • Programmable soft start timer • MOSFET fault detection start and circuit breaker control Increase or decrease the phase of multiphase operation •Automobile dual battery system • Super Cap or Battery Backup Power Converter • Stacked buck or boost converter Figure 1. Functional Block Diagram of the LM5170-Q1 Figure 2. LM5170-Q1 simplified application circuit diagram Figure 3. LM5170-Q1 Application Circuit: 60A Dual Phase 48V/12V Bidirectional Converter The tida-01168 reference design is a four-stage, two-way DC-DC converter development platform for 12 V/48 V automotive systems. The system uses two lm5170-q1 current controllers and one tms320f28027f microcontroller (MCU) for power stage control. The lm5170-q1 system uses the average current feedback of the control current while the C2000TM microcontroller provides voltage feedback. This control scheme eliminates the typical phase current balance of a multiphase converter. The lm5170-q1 system allows for high levels of integration, reducing printed circuit board (PCB) area, simplifying design, and accelerating development. Network Accessories, Network Products, Network Items, Network Equipment, Internet Accessories Chinasky Electronics Co., Ltd. , https://www.chinacctvproducts.com
