TI公司的TPS92630-Q1组合了高VIN DC/DC降压转换器和高VIN低压降(LDO)稳压器,满足汽车AEC-Q100标准,输入电压3.6-V到36-V,最大负载电流3.2A,输出可调电压1.1V-20V,可调开关频率100-kHz到2.5-MHz,主要用在汽车娱乐系统,高档驾驶辅助系统(ADAS),汽车远程通信,eCALL,12V/24V工业和商业低功耗系统.本文介绍了TPS92630-Q1主要特性,框图和两种应用案例,以及CISPR 25汽车尾灯参考设计TIDA-00677主要特性,框图,电路图,材料清单和PCB设计图.
The TPS65321-Q1 device is a combination of a high-VIN DC-DC step-down converter, referred to as the buck regulator, with an adjustable switch-mode frequency from 100-kHz to 2.5-MHz, and a high-VIN 280-mA low-dropout (LDO) regulator. The input range is 3.6-V to 36-V for the buck regulator, and 3-V to 36-V for the LDO regulator. The buck regulator has an integrated high-side MOSFET and an active-low, open-drain power-good output-pin (nRST). The LDO regulator also has an integrated MOSFET and features a low-input supply current of 35-μA typical in no-load condition. The low-voltage tracking feature enables the TPS65321-Q1 device to track the input supply during cold-crank conditions.
The buck regulator provides a flexible design to fit system needs. The external loop compensation circuit allows for optimization of the converter response for the appropriate operating conditions. A low-ripple pulse-skip mode reduces the no-load input-supply current to maximum 140-μA.
The device has built-in protection features such as soft start, current-limit, thermal sensing, and shutdown because of excessive power dissipation. Furthermore, the device has an internal undervoltage-lockout (UVLO) function that turns off the device when the supply voltage is too low.
TPS92630-Q1主要特性:
Qualified for Automotive Applications
AEC-Q100 Qualified with the Following Results:
Device Temperature Grade 1: C40°C to +125°C Ambient Operating Temperature
Device HBM ESD Classification Level 2
Device CDM ESD Classification Level C4B
One High-VIN Step-Down DC-DC Converter
Input Range of 3.6-V to 36-V
250-mΩ High-Side MOSFET
Maximum Load Current 3.2-A, Output Adjustable 1.1-V to 20-V
Adjustable Switch-Mode Frequency 100-kHz to 2.5-MHz
Synchronizes to External Clock
Maximum 140-μA Operating Quiescent Current
High Efficiency at Light Loads With Pulse-Skipping Eco-mode Control Scheme
Reset Output-Pin (Active Low, Open-Drain)
One High-VIN Low-Dropout (LDO) Voltage Regulator
Input Range of 3-V to 36-V
280-mA Current Capability With Typical 35-µA Operating Quiescent Current in No-Load Condition
Low-Dropout Voltage of 300-mV atIO = 200-mA (Typical)
Overcurrent Protection for Both Regulators
Overtemperature Protection
14-Pin HTSSOP Package WithPowerPAD Integrated Circuit Package
TPS92630-Q1应用:
• Automotive Infotainment and Cluster
• Advanced Driver Assistance System (ADAS)
• Automotive Telematics, eCall
• 12-V and 24-V Industrial and Commercial Low Power System
图1.TPS92630-Q1功能框图
图2.TPS92630-Q1设计案例:开关频率2.2MHz
图3.TPS92630-Q1设计案例:开关频率500kHz
CISPR 25尾灯参考设计TIDA-00677
The TIDA-00677 TI design is showcasing a solution for an automotive LED tail light application (Tail/Stop, Turn, Reverse) by using the TPS92630-Q1 linear LED driver supplied by an upstream buck converter (TPS65321-Q1) which is directly supplied through a smart reverse battery diode off the automotive battery voltage. The design has also been subjected to EMI/EMC radiation and pulse tests according to CISPR25 and ISO 7637-2. More information regarding potential cost savings and efficiency (power dissipation, system thermals) can be found in the user guide. For a similar design driven by Boost Converter, please see the TIDA-00678. For a similar design driven directly from car battery, please see the TIDA-00679.directly supplied through a smart reverse battery diode off the automotive battery voltage. The design has also been subjected to EMI/EMC radiation and pulse tests according to CISPR25 and ISO 7637-2. More information regarding potential cost savings and efficiency (power dissipation, system thermals) can be found in the user guide. For a similar design driven by Boost Converter, please see the TIDA-00678. For a similar design driven directly from car battery, please see the TIDA-00679.
CISPR 25尾灯参考设计TIDA-00677主要特性:
Efficiency-optimized design
CISPR-25 tested EMI/EMC
Stays out of AM band
Load dump tolerant
Smart reverse battery protection
CISPR 25尾灯参考设计TIDA-00677应用:
• Automotive Tail Light
• Automotive Front Lighting
• Automotive Interior Lighting
图4.CISPR 25尾灯参考设计TIDA-00677外形图
图5.TPS92630-Q1降压和线性驱动器框图
图6.CISPR 25尾灯系统驱动器框图
LED模块系统指标:
图7.CISPR 25尾灯参考设计TIDA-00677电路图(1)
图8.CISPR 25尾灯参考设计TIDA-00677电路图(2)
图9.CISPR 25尾灯参考设计TIDA-00677电路图(3)
CISPR 25尾灯参考设计TIDA-00677材料清单:
图10.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(1)
图11.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(2)
图12.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(3)
图13.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(4)
图14.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(5)
图15.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(6)
图16.CISPR 25尾灯参考设计TIDA-00677 PCB设计图(7)
详情请见:
http://www.ti.com/lit/ds/symlink/tps65321-q1.pdf
https://www.ti.com/seclit/df/tidrly9/tidrly9.pdf
https://www.ti.com/seclit/df/tidrlz0/tidrlz0.pdf
https://www.ti.com/seclit/df/tidrlz2/tidrlz2.pdf