VN7007AHTR datasheet(23/37 Pages) STMICROELECTRONICS

Part #	VN7007AHTR

Description	High-side driver with CurrentSense analog feedback

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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VN7007AH

Application information

4.4.1

Principle of CurrentSense signal generation

Figure 31: CurrentSense block diagram

Current sense

This output is capable of providing:

•

Current mirror proportional to the load current in normal operation, delivering current

proportional to the load according to known ratio named K

•

Diagnostics flag in fault conditions delivering fixed voltage VSENSEH

The current delivered by the current sense circuit, ISENSE, can be easily converted to a

voltage VSENSE by using an external sense resistor, RSENSE, allowing continuous load

monitoring and abnormal condition detection.

Normal operation (channel ON, no fault, SEn active)

While device is operating in normal conditions (no fault intervention), VSENSE calculation can

be done using simple equations

Current provided by CurrentSense output: ISENSE = IOUT/K

Voltage on RSENSE: VSENSE = RSENSE * ISENSE = RSENSE * IOUT/K

Where :

•

VSENSE is voltage measurable on RSENSE resistor

DocID027957 Rev 2

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