Find a solution | Based on Jiefa AC7840+RTQ8306 car grille light solution

Publisher:huanxinLatest update time:2023-10-23 Source: elecfans Reading articles on mobile phones Scan QR code
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Application scenarios:

At present, front grille lights have been applied to models of many new car-making forces in China. Due to the huge product matrix, traditional car companies give priority to using front grille lights on the new energy models they launch, and have also initially tried them on some fuel models. On different models, front grille lights are applied with different shapes and functions. Among the new car-making forces, manufacturers that currently use front grille lights include: Xiaopeng, Ideal, HiPhi, WM Motor, Skywell, etc., and the models include Xiaopeng G3i, P5, P7, Ideal One, HiPhiX, WM Motor W6, M7, Skywell ME5, ME7. The characteristic of new force manufacturers is that they do not have many mass-produced models. In order to enhance brand recognition through family-style appearance design, front grille lights will be used in all models of the brand.


Market advantages:

This solution uses the Jiefa AC7840 series automotive MCU as the main control and the Richtek RTQ8306 LED driver. The AC7840X uses the M4F core, the main frequency is 120MHz, the Flash space is up to 1MB, 128KB RAM with ECC, rich peripherals, and meets the ASIL-B functional safety standard; it supports development environments such as MDK, IAR, eclipse, as well as official driver libraries and routines to facilitate user development. Richtek RtQ8306 is a 36-channel 4-zone LED driver with adjustable single-channel current, and has passed the automotive AEC-Q100 certification.


►Scenario application diagram

341bf8d2-7c0b-11ed-b116-dac502259ad0.jpg


► Display board photos

34373d36-7c0b-11ed-b116-dac502259ad0.jpg 345a11b2-7c0b-11ed-b116-dac502259ad0.jpg


►Solution Block Diagram

3473b090-7c0b-11ed-b116-dac502259ad0.png


►Core technology advantages

Advantages of key component Jiefa AC7840:

1. Automotive-grade high performance: Cortex-M4F core, 120MHz main frequency

2. Rich peripheral resources:

1MB Flash, 128KB SRAM

48-channel ADC, 6 8-channel PWM

4 CAN FD, 4 UART, 3 SPI, 1 I2C

Voltage range 2.7v-5.5v

Package: 64-QFP, 100-QFP, 144-QFP

Temperature range: -40C to +125C

3. Functional safety: ASIL-B


Advantages of the key device Richtek RTQ8306:

1. Automotive certification: Passed AEC-Q100 automotive certification

2. Features:

36 LED channels

LED channel drive current 5mA-60mA

Support 1-4 zone scanning

Maximum 24V output LED voltage

One global 8-bit IDAC, 36-channel independent 8-bit DAC

25MHz SPI interface rate

· WQFN 7X7-56L


►Solution Specifications

1. 36 channels, 4 zones scanning, 4 LEDs in each channel

2. With low power mode

3. Temperature range -40 C to 125 C

4. Use SPI for communication

5. 60Hz dynamic synchronization


Reference address:Find a solution | Based on Jiefa AC7840+RTQ8306 car grille light solution

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