AFE43902-Q1

AFEx3902-Q1 Smart Analog Front End (AFE) for Multislope Thermal Foldback and LUT-Based Control With I2C and SPI

1Features •AEC-Q100qualifiedforautomotiveapplications: –Temperaturegrade1:–40°Cto+125°C,TA •Multislopethermalfoldback –10-bitanalog-to-digitalconverter(ADC)input –Digital-to-analogconverter(DAC)output •10-bit(AFE53902-Q1) •8-bit(AFE43902-Q1) –PulseWidthModul

AFE43902-Q1

具有多斜率热折返控制和内置 ADC 的汽车级双通道 8 位智能 DAC; • AEC-Q100 qualified for automotive applications: \n• Temperature grade 1: –40°C to +125°C, T A\n \n• Multislope thermal foldback \n• 10-bit analog-to-digital converter (ADC) input\n• Digital-to-analog converter (DAC) output \n• 10-bit ( AFE53902-Q1)\n• 8-bit ( AFE43902-Q1)\n \n• Pulse Width Modulation (PWM) output with 7‑bit duty cycle\n• Standalone operation from nonvolatile memory (NVM)\n• Look-up table (LUT) based parameter configuration\n• Piecewise-linearizer for thermistor\n \n• Automatically detects I 2C or SPI \n• 1.62-V V IH with V DD = 5.5 V\n \n• VREF/MODE pin selects between programming and standalone modes\n• User-programmable NVM\n• Internal, external, or VDD reference\n• Wide operating range \n• Power supply: 1.8 V to 5.5 V\n \n• Tiny package: 16-pin WQFN (3 mm × 3 mm);

The 10-bit AFE53902-Q1 and 8-bit AFE43902-Q1 devices ( AFEx3902-Q1) are dual-channel, smart analog front ends (AFE) targeted for multislope thermal foldback of LED lighting. The output of LED lights reduce with an increase in temperature. Multislope thermal foldback helps maintain a steady light output from LEDs, irrespective of temperature change, while limiting the LED temperature to programmed thresholds.\n\nThe AFEx3902-Q1 have an ADC for temperature input and a DAC or PWM generator as an output. These devices have an integrated state machine that is preprogrammed as a multislope thermal foldback controller. The AFEx3902-Q1 are an excellent choice for thermal foldback of automotive rear lights and headlights, as well as horticulture lights. The AFEx3902-Q1 work independently from the parameters programed into the NVM, and thus enable these smart AFEs for processor-less applications and design reuse. These devices also automatically detect I 2C or SPI, and have an internal reference.

DAC43902-Q1

DAC4390x-Q1AutomotiveSmartDACsforLogarithmicFade-InFade-OutandSequentialTurnAnimationWithI2C,SPI,GPIO,andPWMInterfaces

1Features •AEC-Q100qualifiedforautomotiveapplications: –Temperaturegrade1:–40°Cto+125°C,TA •Pulse-widthmodulation(PWM)outputondigital pins(218Hzto48.8kHz) •Logarithmicdimming •LEDfade-infade-outwithGPIOcontrol •Sequentialturnindicatoranimation •Programm

DAC43902-Q1

DAC4390x-Q1AutomotiveSmartDACsforLogarithmicFade-InFade-OutandSequentialTurnAnimationWithI2C,SPI,GPIO,andPWMInterfaces

1Features •AEC-Q100qualifiedforautomotiveapplications: –Temperaturegrade1:–40°Cto+125°C,TA •Pulse-widthmodulation(PWM)outputondigital pins(218Hzto48.8kHz) •Logarithmicdimming •LEDfade-infade-outwithGPIOcontrol •Sequentialturnindicatoranimation •Programm