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TLE9185QXV33 Datasheet(PDF) 49 Page - Infineon Technologies AG

Part # TLE9185QXV33
Description  BLDC Driver
Download  192 Pages
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Manufacturer  INFINEON [Infineon Technologies AG]
Direct Link  http://www.infineon.com
Logo INFINEON - Infineon Technologies AG

TLE9185QXV33 Datasheet(HTML) 49 Page - Infineon Technologies AG

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Datasheet
49
Rev. 1.0
2021-01-21
TLE9185QXV33
BLDC Driver
Gate Drivers
9.3
PWM operation
The half-bridge can be controlled in PWM using either three or six PWM inputs.
The TLE9185QXV33 offers the possibility to detect the active and the freewheeling (FW) MOSFET in each half-
bridge.
9.3.1
Determination of the active and freewheeling MOSFET
If EN_GEN_CHECK = 1, right before each MOSFET activation, the device detects which MOSFET of the half-
bridge is the active MOSFET and which MOSFET is the free-wheeling (FW) MOSFET:
• If VSHx > VS - VSHH: The high-side MOSFET is the FW MOSFET and the low-side MOSFET is the active
MOSFET.
• If VSHx < VSHL: Then the low-side MOSFET is the FW MOSFET and the high-side MOSFET is the active
MOSFET.
• If VSHL < VSHx < VSHH: No clear distinction between the active FW MOSFET and the active MOSFET. The
next MOSFET to be turned on is turned on as if it was the active MOSFET.
If EN_GEN_CHECK = 0, the detection of the active and FW MOSFET is disabled. The PWM MOSFET is considered
as the active MOSFET.
Figure 26 shows the detection of the active and of the FW MOSFET.
Figure 26
Detection of the active and FW MOSFET - Principle
9.3.2
Configurations in PWM mode
The following sections describe the different control schemes in PWM mode.
SL
GLx
SHx
GHx
VS
VCP
VCP
High-Speed
Comparators
Lowside
Gate-Driver
Highside
Gate-Driver
VSHH
VSHL
HS and LS off
Freewheeling through
high-side MOSFET body diode
VSHx > VSHH
HS = FW MOSFET
LS = Active MOSFET
HS and LS are off
Freewheeling through
low-side MOSFET body diode
VSHx < VSHL
LS = FW MOSFET
HS = Active MOSFET
SL
GLx
SHx
GHx
VS
VCP
VCP
High-Speed
Comparators
Lowside
Gate-Driver
Highside
Gate-Driver
VSHH
VSHL


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