Half bridge circuit driver chip with protection circuit and protection method thereof

A half bridge circuit driver chip, which is configured to control a switching between a high side transistor and a low side transistor, comprising:

• a high side signal input terminal receiving a high side input signal;
• a high side signal output terminal connected to the high side transistor;
• a low side signal input terminal receiving a low side input signal;
• a low side signal output terminal connected to the low side transistor;
• a first pulse generating circuit connected to the high side signal input terminal and converting the high side input signal into a high side pulse signal;
• a first voltage level shifter connected to the first pulse generating circuit and elevating a voltage level of the high side pulse signal;
• a high side driving circuit connected to the first voltage level shifter, converting the high side pulse signal to a high side driving signal, and controlling the switching of the high side transistor by the high side signal output terminal;
• a high side voltage detecting circuit connected to the high side signal output terminal and detecting a high side turn-on voltage when turning on the high side transistor;
• a second pulse generating circuit connected to the high side voltage detecting circuit and converting the high side turn-on voltage into a high side turn-on pulse;
• a second voltage level shifter connected to the second pulse generating circuit, lowering a voltage level of the high side turn-on pulse and generating a high side turn-on signal;
• a low side driving circuit connected to the low side signal input terminal, converting the low side input signal into a low side driving signal, and controlling the switching of the low side transistor by the low side signal output terminal;
• a low side voltage detecting circuit connected to the low side signal output terminal, detecting a low side turn-on voltage when turning on the low side transistor and generating a low side turn-on signal;
• and
• a protection circuit connected to the second voltage level shifter and the low side voltage detecting circuit, wherein, when receiving the high side turn-on signal and the low side turn-on signal, a reset signal is generated and output to the first pulse generating circuit, the first pulse generating circuit transmits the reset signal to the first voltage level shifter, the first voltage level shifter converts the reset signal to the high side driving circuit for turning off the high side driving circuit and to the low side driving circuit for turning off the low side driving circuit.