characteristic

• Meets AEC-Q100 standards for automotive applications

– Class 1: operating ambient temperature range from – 40 ° C to 125 ° C

– Device HBM classification grade H1C

– Device CDM classification level C5

• Provide functional safety

– Documents that can help with the design of functional security systems

• Wide input voltage range from 4.5V to 65V

• Continuous output current up to 1.6A with an accuracy of 4%

• Adaptive on time average current control

• Programmable switch frequency range is 100kHz to 2.2MHz

• Advanced dimming operation

– 10 bit precision analog dimming

– 10 bit precision internal PWM dimming

– Support external PWM dimming input

– Optimized for external shunt dimming (including LED matrix manager)

• Switch cycle by cycle overcurrent protection

• Switch overheating protection

• Serial peripheral interface (SPI)

– Configurable analog reference, switching frequency and PWM dimming duty cycle

– Fault monitoring and reporting

• Support limp home (LH) and independent mode operation

2 Application

• Automobile headlamp and adaptive LED driver module

explain

TPS92520-Q1 is a single chip dual channel synchronous step-down LED driver with a wide working input voltage range of 4.5V to 65V, which can be independently

Two series connected LED power supply. TPS92520-Q1 implements adaptive on time average current mode control function, which is designed to be compatible with shunt FET dimming technology and dynamic beam headlamp based on LED matrix manager. The adaptive on time control function can provide nearly constant switching frequency

The frequency setting range is 100kHz to 2.2MHz.

Inductor current sensing and closed-loop feedback functions can achieve an accuracy of more than ± 4% in a wide range of input voltage, output voltage and ambient temperature. High performance LED drivers can use analog dimming or PWM dimming technology to individually modulate LED current. The linear analog dimming response higher than 16:1 can be obtained by programming the 10 bit IADJ value through SPI. PWM dimming of LED current is achieved by directly modulating the corresponding UDIM input pin with the required duty cycle or by enabling the internal PWM generator circuit. By comparing the values of the 10 bit PWM register and the programmable digital counter, the PWM generator can convert the 10 bit PWM register value to the corresponding duty cycle.

TPS92520-Q1 integrates advanced SPI programmable diagnostic and fault protection functions, including cycle by cycle current limiting, bootstrap undervoltage protection

LED open circuit, LED short circuit, thermal warning and thermal shutdown functions. On board 10 bit ADC is an important input parameter for monitoring and diagnosing system operation

To sample.

TPS92520-Q1 uses 8.1mm x 11mm heat enhanced 32 pin HTSSOP package (with 2.75mm x 3.45mm top exposed

Thermal pad and bottom exposed thermal pad).