BPA861X｜High quality BPA series home appliance AC/DC chip

With the arrival of the wave of substitution of localized chips, the home appliance industry has also ushered in a good opportunity for domestic substitution. The home appliance industry has high requirements for system reliability, not only requiring high-quality chips, but many customers also request input overvoltage protection.

Therefore, Jingfeng Mingyuan launched the BPA861X series of high-quality chips, which integrate the input over-voltage protection OVP and input under-voltage protection functions through the drain pin. The peripherals are extremely streamlined, and the entire production test process is managed in accordance with high-quality requirements. It can be widely used in auxiliary power supply circuits of home appliances.

Features

BPA861X

1. Built-in input over-voltage protection function to enhance system reliability;

2. Multiple protection functions, and automatic recovery after the failure is removed;

3. Built-in soft start function to reduce the stress of the switch tube;

4. The chip is highly integrated, the peripheral circuit is simple, and the cost is low.

Comparison-input overvoltage protection
At present, many chips on the market do not have the input overvoltage protection function. The input overvoltage protection of individual chips needs to be realized by an external series of resistors. Our chip integrates the input overvoltage protection function into the internal, which simplifies the peripheral circuit configuration and reduces the cost.

No input overvoltage protection

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Realize input overvoltage protection through peripheral circuit

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Built-in input overvoltage protection

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Contrast-fault removal and self-recovery
The chip has built-in output short circuit, overvoltage, overload, and feedback open circuit faults. After the chip triggers the protection, it enters the automatic restart sequence, and restarts after a certain interval.

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Existing products on the market directly lock up after output over-voltage failure and cannot work

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BPA861X enters the automatic restart sequence after the output over-voltage fault, and the fault is removed and resumes work

Comparison-built-in soft start function
The chip has a built-in soft-start function, which controls the MOS peak current to gradually increase during the start-up process to avoid the accumulation of excessive current on the primary side, thereby reducing MOS current stress and secondary diode voltage spikes.

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No soft chip, MOS start-up current overshoot is large

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BPA861X built-in soft start, MOS start-up current overshoot is small

application solution
BPA861X

1. The physical map of the plan



2. Scheme schematic diagram

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3. Basic test data: efficiency

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4. Dynamic load





5. Temperature rise

test introduction

√Test in a thermostat

√The circuit board is placed in a closed box

√The thermocouple is connected to each measuring point

√Record the data after the temperature of the measuring point reaches a stable level

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6. Conducted EMI



7. Surge test

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8. EFT test

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9. ESD test

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product model
BPA861X

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The BPA861X series integrates 700V high voltage MOSFET, and integrates input over-voltage protection OVP and input under-voltage protection through the drain pin. At the same time, the chip also has output overload OLP/short circuit protection, chip over-temperature protection OTP, etc., with simplified peripheral circuits and high reliability. It is a high-quality chip that is very suitable for auxiliary power supplies of home appliances.