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TLE9262QXV33 Datasheet, PDF (53/164 Pages) Infineon Technologies AG – Dedicated Data Sheets are available for the different product variants | |||
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TLE9262QXV33
External Voltage Regulator 3
8.4
Calculation of RSHUNT
As a independent regulator, the maximum current ICC3max where the limit starts and the bit ICC3 > ICC3max is set is
determined by the shunt resistor RSHUNT and the Output Current Shunt Voltage Threshold Vshunt_threshold.
The resistor can be calculated as following:
R = U I SHUNT
shunt _ threshold
CC 3 max
(1)
If VCC3 is configured for load sharing, then the shunt resistor determines the load sharing ratio between VCC1
and VCC3. The ratio can be calculated as following:
I CC 3 = 110 Ω 105 â 15 mV I CC 1
(a )
(2)
I CC 1
R SHUNT
I CC 3 =
I CC 1 â
110 Ω 105
R SHUNT
â 15 mV
(b )
Example: A shunt resistor with 470m⦠and a load current of 100mA out of VCC1 would result in ICC3 = 191mA.
8.5
Unused Pins
In case the VCC3 is not used in the application, it is recommended to connect the unused pins of VCC3 as
followed:
⢠Connect VCC3SH to VS or leave open;
⢠Leave VCC3B open;
⢠Leave VCC3REF open
⢠Do not enable the VCC3 via SPI as this leads to increased current consumption
Data Sheet
53
Rev. 1.1, 2014-10-23
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