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STA517B13TR View Datasheet(PDF) - STMicroelectronics

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Description
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STA517B13TR
ST-Microelectronics
STMicroelectronics ST-Microelectronics
STA517B13TR Datasheet PDF : 13 Pages
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Power supply and control sequencing
4
Power supply and control sequencing
STA517B
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
V
Vcc
VL
Vcc > VL
t
PWRDN
t
IN
t
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.
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