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STA516B Scheda tecnica(PDF) 8 Page - STMicroelectronics |
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STA516B Scheda tecnica(HTML) 8 Page - STMicroelectronics |
8 / 13 page Power supply and control sequencing STA516B 8/13 4 Power supply and control sequencing To guarantee correct operation and reliability, a correct turn on/off sequence must be followed. Figure 3 shows the correct power on sequence. Figure 3. Correct power-on sequence Vcc must turn on before VL in order to prevent uncontrolled current flowing through an internal protection diode connected between VL (logic supply) and Vcc (high power supply). Failure to do so could result in damage to the device. PWRDN must be released after VL is switched on. An input signal can then be sent to the power stage. PWRDN IN Vcc VL Vcc > VL V t t t |
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