L9026 datasheet(21/60 Pages) STMICROELECTRONICS

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Power stages

There are two fixed high-side channels and six channels which can be used either as low-side or as high-side

switches. During the diagnosis in OFF State, the sequences of operations (pull-up or pull-down current source

activation) are determined according to the SPI settings of CFG_0 register.

For the configurable channels, when in high-side configuration, the load is connected between ground and source

of the power transistor (pins SOURCEn, n = 2...7) while the drains (pins DRAINn, n = 2...7) can be connected to

any potential between ground and VBATT.

The source of the power transistors in case of low side configuration is connected to ground pin (or directly or via

a reverse current blocking diode).

For each channels the configuration can be selected through SPI.

Figure 8. HS driver (left) and LS driver (right) configuration

7.1

Operating modes

The RDS(ON) (on-state resistance), depends on the Tj (junction temperature) and on the supply voltage.

7.1.1

Switching resistive modes

Refer to the following switching times and slew rates in case of switching of resistive loads.

L9026

Power stages

DS13397 - Rev 9

page 21/60

L9026 数据表(PDF) 21 Page - STMicroelectronics