TPS65311-Q1中文资料适用于汽车安全应用的汽车类 4V 至 40V、5 稳压输出电源管理 IC数据手册TI规格书

描述 Description

The TPS65311-Q1 device is a power-management IC (PMIC), meeting the requirements of digital-signal-processor (DSP) controlled-automotive systems (for example, advanced driver-assistance systems). With the integration of commonly used supply rails and features, the TPS65311-Q1 device significantly reduces board space and system costs.

The device is capable of providing stable output voltages to the application, including a typical 5-V CAN-supply, from a varying input power supply (such as an automotive car battery) from 4 V to 40 V. The device includes one synchronous buck controller as a pre-regulator that offers flexible output power to the application. For post-regulation, the device includes two synchronous buck and one asynchronous boost converter, working at a switching frequency of 2.45 MHz to allow for a smaller inductor which requires less board space. The two buck converters also offer internal loop compensation which eliminates the need for external compensation components. Furthermore, the device includes a low-noise linear regulator.

To help support system safety, the device includes voltage monitoring on all supply rails and a window-watchdog to monitor the MCU and DSP. Other features include a high-side driver which drives a warning-lamp LED, a reference voltage which is used as ADC reference in the MCU, DSP, and a shutdown comparator which, in combination with external NTC-resistor, switches off the device at too-low ambient temperature.

特性 Features

• Qualified for Automotive Applications
• AEC-Q100 Test Guidance With the Following Results:
• Device Temperature Grade 1: –40°C to +125°C Ambient Operating Temperature
• Device HBM ESD Classification Level H1B
• Device CDM ESD Classification Level C4B

• Input Voltage Range: 4 V to 40 V, Transients up to 60 V; 80 V When Using External PMOS-FET
• Single-Output Synchronous-Buck Controller
• Peak Gate-Drive Current 0.6 A
• 490-kHz Fixed Switching Frequency
• Pseudo Random Frequency-Hopping Spread Spectrum or Triangular Mode

• Dual-Synchronous Buck Converter
• Designed for Output Currents up to 2 A
• Out of Phase Switching
• Switching Frequency: 2.45 MHz

• Adjustable 350-mA Linear Regulator
• Adjustable Asynchronous-Boost Converter
• 1-A Integrated Switch
• Switching Frequency: 2.45 MHz

• Soft-Start Feature for All Regulator Outputs
• Independent Voltage Monitoring
• Undervoltage (UV) Detection and Overvoltage (OV) Protection
• Short Circuit, Overcurrent, and Thermal Protection on all supply output rails
• Serial-Peripheral Interface (SPI) for Control and Diagnostic
• Integrated Window Watchdog (WD)
• Reference Voltage Output
• High-Side (HS) Driver for Use with External PMOS-FET for driving an LED
• Input for External Temperature Sensor for Shutdown at TA