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TLE9185QXV33 Datasheet(PDF) 102 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) 102 Page - Infineon Technologies AG

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TLE9185QXV33
BLDC Driver
Supervision Functions
Datasheet
102
Rev.1.0
2021-01-21
10.9
Bridge driver
This section describes the supervision functions related to the bridge driver.
10.9.1
Bridge driver supervision with activated charge pump
This section describes the supervision functions when the charge pump is activated.
10.9.1.1 Drain-source voltage monitoring
Voltage comparators monitor the activated MOSFETs to protect high-side MOSFETs and low-side MOSFETs
against a short circuit respectively to ground and to the battery during ON-state.
A drain-source overvoltage is detected on a low-side MOSFET if the voltage difference between VSHx and SL
exceeds the threshold voltage configured by LS_VDS (see Table 28). Consequently, the corresponding half-
bridge is latched off with the static discharge current.
A drain-source overvoltage is detected on a high-side MOSFET if the voltage difference between VS and VSHx
exceeds the threshold voltage configured by HS_VDS (see Table 29). Consequently, the corresponding half-
bridge is latched off with the static discharge current.
Attention: 2 V threshold is dedicated for the diagnostic in off-state. It is highly recommended to select
another drain-source overvoltage threshold once the routine of the diagnostic in off-state has
been performed to avoid additional current consumption from VS and from the charge pump.
The device reports a Drain-Source overvoltage error if both conditions are met:
Table 28
Low-side drain-source overvoltage threshold
LSxVDSTH[2:0]
Drain-Source overvoltage threshold for LSx (typical)
000B
160 mV
001B
200 mV (default)
010B
300 mV
011B
400 mV
100B
500 mV
101B
600 mV
110B
800 mV
111B
2 V
Table 29
High-side drain-source overvoltage threshold
HSxVDSTH[2:0]
Drain-Source overvoltage threshold for HSx (typical)
000B
160 mV
001B
200 mV (default)
010B
300 mV
011B
400 mV
100B
500 mV
101B
600 mV
110B
800 mV
111B
2 V


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