CX8812 car Charging scheme (INPUT:DC 8v-32dc output:5v/3.1a DC)

CX8812 Car Charging source program QQ 2892715427

is a high-precision, highly efficient DC-to-car charging power management chip

(INPUT:DC 8v-32dc output:5v/3.1a DC)

Design features

1.DC 8v-32 V Input

2,DC 5v/3.1a Output

3. Output Maximum ripple ≤100mv

4. No-load power consumption <0.8ma

5. Average efficiency ≥88% (board to board test)

6. Complies with EN55022 global EMC labeling

7. With over-current, over-temperature and input low-voltage protection

8. With output short-circuit protection

9. Over-voltage protection with output

Test conditions: Input voltage vin is 12v/24v/28v, output voltage vout=5v, output current iout=3.1a, thermostat chamber temperature is 30 degrees

PCB Cabling Recommendations

1. The path of the blue bold part of the circuit diagram should be as short and as wide as possible.

2. D1 Schottky switch end and inductance connection line to be as short as possible, wide.

3. Sensitive analog lines, such as Vout and Isen traces, must be kept away from the switching line to avoid coupling effects on the output voltage, current and carrying capacity.

4. Input capacitance c1,c2 and C3 as close as possible to the IC 4,3 foot (i.e. vin pin, VB).

5. D1 Schottky, C9 ground and output ground as close as possible to the input (do not over input capacitance).

6. The CX8812 is fixed 0.35V line compensation, the load current closer to the limit of the line to fill the higher.

CX8812 car Charging scheme (INPUT:DC 8v-32dc output:5v/3.1a DC)