L9026 datasheet(17/60 Pages) STMICROELECTRONICS

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6.7

Sleep mode

In Sleep mode, the outputs of L9026 are OFF and the SPI registers are reset to default values. The current

consumption is reduced to the IVDDIO(SLEEP) and IVBATT(SLEEP).

6.8

Idle mode

In Idle mode, the current consumption of the device reaches the parameters IVDDIO(IDLE) and IVBATT(IDLE).

ON diagnosis functions are not available. During IDLE mode the output channels are disabled. The SPI

communication is properly working, when the VDDIO is present.

6.9

Active mode

The Active mode is needed when there are loads to drive. The current consumption is described through these

two parameters: IVDDIO(ACTIVE) and IVBATT(ACTIVE).

In case CFG_1.ACT is set to “1”, the device enters in Active mode and remains in this state independently on the

status of input pins, of internal PWM generators and PWM_SPI.OUTn bits.

Otherwise, in case the bit CFG_1.ACT is not set, in order to move the device in Active mode all conditions below

are needed:

•

the IDLE pin set to “high”

•

the outputs configured as driven either by external pins (through MAPIN0, MAPIN1 registers) or by SPI (at

least one PWM_SPI.OUTn bit is set to “1”) or by the internal PWM generators (through MAP_PWM)

•

at least one channel enabled

In this scenario, the device returns to Idle mode as soon as IDLE pin is set to “low”, all inputs pins are set to “low”,

all PWM_SPI.OUTn bits are set to “0” and all the internal pwm generators are OFF.

Being the IDLE pin asserted high, an under voltage condition on VDDIO supply brings the device into Idle mode

once all INn input pins are set to “low”, on top of the setting of the bit CFG_1.ACT.

L9026

Power supply

DS13397 - Rev 9

page 17/60

L9026 датащи(PDF) 17 Page - STMicroelectronics