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NCP51530 Datasheet(PDF) 16 Page - ON Semiconductor

Part No. NCP51530
Description  High Frequency High and Low Side Driver
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
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NCP51530 Datasheet(HTML) 16 Page - ON Semiconductor

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NCP51530
www.onsemi.com
16
Figure 28. UVLO Timing Diagram
VCCON
LIN
LO
HIN
HO
VBON
VCCOFF
VCC
VB − VHB
UNDER VOLTAGE LOCK−OUT
NCP51530 has under voltage lockout protection on both
the high side and the low side driver. The function of the
UVLO circuits is to ensure that there is enough supply
voltages (VCC and VB) to correctly bias high side and low
side circuits. This also ensures that the gate of external
MOSFETs are driven at an optimum voltage.
If the VCC is below the VCC UVLO voltage, the low side
driver output (LO) and high side driver output (HO) both
remain low.
If VB is below VB UVLO voltage the high side driver
output (HO) remains low. However if the VCC is above VCC
UVLO voltage level, the low side driver output (LO) can
still turn on and off based on the low side driver input (LI)


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