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STA517B Datasheet(PDF) 8 Page - STMicroelectronics

Part # STA517B
Description  60 V 6 A quad power half bridge
PDF  13 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STA517B Datasheet(HTML) 8 Page - STMicroelectronics

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Power supply and control sequencing
STA517B
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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