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L9301：Octal low side driver or quad low side plus quad high side driver

The L9301 is a SPI (Serial Peripheral Interface) controlled octal channel with 4 high/low and 4 low side drivers with the possibility to use four integrated PowerMOS as recirculation diodes for PWM load driving.

L9301 contains 12 PowerMOS: 4 configurable High/Low side drivers with R_onmax= 0.6 Ω (DRN1-4, SRC1-4), 4 low side drivers with R_onmax= 0.6 Ω (OUT1-4) and 4 low side drivers with R_onmax= 0.3 Ω (OUT5-8).

The power DRN/SRC1-4 and OUT1-4 can be connected in parallel outside the device in order to get 4 low-side drivers with R_onmax= 0.3 Ω: DRN1//DRN2, DRN3//DRN4, OUT1//OUT2, OUT3//OUT4.

In this way there are a total of 8 LS channels for ON-OFF mode with R_onmax= 0.3 Ω.

There is also the possibility to connect the OUT1-4 and OUT5-8 in order to drive in PWM mode a load connected to VB or GND without the necessity of a freewheeling diode. In this case the R_onmax= 0.6 Ω.

The above configuration can be driven by parallel input or SPI command.

Through the SPI it is possible to configure the device parameters like configuration, Slew-rate, Overcurrent threshold, to send the drivers commands and to read back the diagnosis results.

Key Features

• Eight integrated PowerMOS configurable as:
  • 8 low side ON-OFF with RON(max) = 0.3 Ω @ Tj = 175 °C
  • High/low side PWM with RON(max) = 0.6 Ω @ Tj = 175 °C and 4 Low side with RON(max) = 0.3 Ω @ Tj = 175 °C
• Operating battery supply voltage 5 V to 18 V
• Operating Vdd supply voltage 4.75 V to 5.25 V
• Logic inputs TTL/CMOS-compatible
• Output voltage clamping 37 V typ. in low-side configuration
• SPI interface for outputs control and for diagnosis data communication
• Additional PWM inputs for 8 outputs
• Over temperature protection
• Open load, short to GND, short to VB
• Overcurrent diagnostics in latched or unlatched mode for each channel
• Controlled SR for improved EMC behavior

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