NXP Semiconductors (NXP Semiconductors) has launched a fully integrated and highly flexible driver chip solution based on automotive-grade technology for automotive LED headlight and taillight applications. According to NXP, the ASL1010NTK and ASL1010PHN in 8 / 16-pin packages are the industry ’s first automotive LEDs that integrate multi-core functions such as direct LED temperature feedback, LED fault detection, internal pulse width (PWM) dimming control, and short circuit protection. The driver chip, all these functions are based on the car-level analog mixed-signal platform, which can greatly reduce the energy consumption and cost of car headlights and taillights.
Prem Sharma, marketing and business development manager of NXP Semiconductors Automotive Solid-State Lighting Driver Chip Division, said that the NXP compact LED driver chip solution consists of only one driver IC and 11 external components, while the counterpart solution requires more than 20 peripheral components. Therefore, the architecture of ASL1010NTK aims to reduce the system cost and the development time of lighting control devices and LED designers, and shorten the time to market for user products.
The ASL1010NTK / ASL1010PHN driver chip integrates the core functions necessary for automotive LED lights. This compact all-in-one solution requires no additional components. The integrated design of control and management eliminates the redundant functions of different platforms and the external MCU. Need, users do not need to redesign the PCB board. For LED module design, it is beneficial to reduce costs, enhance aesthetics, and improve reliability. In addition, this system solution launched by NXP is extremely flexible and is not limited by the vehicle platform, configuration, output voltage, and number of LEDs.
Some of the technical features of this solution include: the temperature feedback function of non-sensing temperature sensing by reducing the sensing resistance, which can control the temperature and performance of the LED without additional heat dissipation design; without external components such as filters, Through the sensitive pulse width modulator (PWM) programming to realize the resistance gradation input control current mode, the LED ripple current is eliminated, and at the same time, there is no obvious change to the LED light brightness, at least it cannot be observed by the human eye. The adjustable LED internal PWM generation function allows the same LED lamp to be used as a daytime running light and a parking light at the same time.
NXP's first automotive LED driver chip uses an automatic buck / boost topology. It can safely drive up to 20 LED lights using standard car battery voltage; the output voltage range is 6V to 60V, supporting all the current market LED-like. In addition, the ASL1010NTK / ASL1010PHN driver chip is made based on the ABCD9 technology node—NXP is an automotive technology platform that promotes analog mixed signal integration. Prem Sharma revealed that in the future, low current switches, bus interfaces and multi-channel drivers will also be integrated one after another, and the LED driver solution integrated in the bus module has been planned in the NXP technology roadmap.
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