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Grid Electrode Driving Circuit Composed Of IR2121

2014-11-20 01:31  
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Grid Electrode Driving Circuit Composed Of IR2121
The picture shows the grid electrode driving circuit composed of IR2121. The IR2121 is a low-side grid electrode driving IC with the current-limiting function. The picture (a) shows the IR2121 internal equivalent circuit. The IR2121 has the error output port (ERR). The circuit shut-off time is set by the ERR port with the external connected capacitor. The input (IN) signal voltage level is TTL positive logic level. The threshold voltage is 1.8V. The power detecting port (CS) threshold voltage is 230mV with internal setting 500ms interval. The delay time's typical value is 700ns from detecting the over current to the circuit shutting off.