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L9908 датащи(PDF) 60 Page - STMicroelectronics

номер детали L9908
подробное описание детали  Automotive 3-Phase motor gate driver unit
PDF  153 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9908 датащи(HTML) 60 Page - STMicroelectronics

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5.12
Half bridges gate drivers
The core feature of L9908 is represented by the three identical and independent gate pre-driver stages to drive
three inverter`s half bridges. Each half bridge pre-driver is composed by a floating current controlled LS and HS
pre-driver couple.
The specific n-th half bridge driver can be disabled by the dedicated SPI bit HBn_DIS, n = [1,2,3], within the
register GEN_CFG4 as follows:
Table 55. n-th Half Bridge pre-drivers disable mode bit
HBn_DIS
Description
0
n-th HS/LS drivers is enabled (Default)
1
n-th HS/LS drivers is disabled
When disabled the n-th half bridge driver’s internal HS/LS PU stages are off while the internal HS/LS PD are on
resulting in a VGHS_n-VSHS_n = 0 V and VGLS_n-VSLS_n = 0 V.
Figure 33. Pre-drivers Disable mode behavior
All drivers can be set in high impedance state by the dedicated SPI bit DRV_HIZ within the register GEN_CFG4
as follows:
Table 56. Pre-drivers HIZ mode enable bit
DRV_HIZ
Description
0
Pre-drivers in NO high impedance
1
Pre-drivers in high impedance (Default)
When in HIZ mode the half bridge driver’s internal HS/LS PU and PD stages are both off resulting in a VGHS_n-
VSHS_n = HIZ and VGLS_n-VSLS_n = HIZ.
L9908
Half bridges gate drivers
DS13546 - Rev 3
page 60/153



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