Freescale TC264 main control expansion board

![Picture.jpg] ## Power supply solution:

### **5V: Use DC-DC, using the LM2596 solution. LM2596 is a switching voltage regulator of a non-synchronous step-down power management monolithic integrated circuit. It can output a drive current of 3A and has good linearity and load regulation characteristics. LM2596 internally contains a 150KHZ oscillator, 1.23v reference voltage stabilizing circuit, thermal shutdown circuit, current limit circuit, amplifier, comparator and internal voltage stabilizing circuit. The input voltage range is wide, up to 40V. This voltage regulator can provide a DC load current of up to 3A, which is enough for smart cars. **
![LM2596.png] ### 3V3: Use dual-channel LM39100 to power the microcontroller and camera respectively. *lm39100* is a fixed output regulator and a low-voltage linear regulator that can output a maximum current of 1A. , can supply power to encoders, TFT displays, etc. This power supply method makes the output power less susceptible to interference and can make the signals collected by the sensor more stable. This chip has smaller ripples, higher stability, smaller heat generation, and sufficient load capacity to meet the power supply needs of MCUs and various external modules.
![LM39100.png] ### As for steering gear: AS1015 power supply voltage stabilizing chip is a new type of high-efficiency power supply voltage stabilizing chip. It uses P-MOSFET internally to replace LM2576, LM2596 and other chips. It has high power, high efficiency, and low voltage. Advantages of reducing size.
![AS1015.png] ## Motherboard features:

#### 1. Onboard camera interface, compatible with a variety of cameras.

#### 2. Onboard dual-channel encoder interface, collecting dual-channel speed at the same time

#### 3. On-board motor interface, use XH2.54_5P connecting cable to expand to the BTN7971 dual-channel motor driver board.

#### 4. Onboard boat-shaped switch and key switch circuit and DIP switch,

#### 5. Onboard multi-channel LED indicators and signal indicators.

#### 6. Onboard BAT battery voltage detection.

#### 7. Onboard dual-channel servos with adjustable voltage.

#### 8. Compatible with Freescale LQ core board

### The corresponding BTN7971 dual-channel driver open source address https://oshwhub.com/siwan/dian-ji-shuang-lu-qu-dong
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