Datasheet L9848 (STMicroelectronics)

L9848
Octal configurable low/high side driver
Features
■ Configurable up to 6 high side drivers ■ RDSON = max.1.5 @ Tj = 25 °C ■ Current limit of each output at min. 0.8 A ■ Supply voltage 4.75 V to 5.25 V ■ Output voltage clamping min. 35 V (low side mode) ■ Output voltage clamping -30 V (high side mode)
SO-28
■ SPI interface for data communication ■ Additional PWM inputs for 2 outputs ■ Thermal shutdown for all outputs ■ Open load detection in off mode ■ Reverse battery protection for outputs (amb) In addition, 2 outputs are capable of being ■ Ground disconnection for high side configured PWMed via an external pin (outputs 5-6). The outputs integrated standard serial peripheral interface (SPI) controls all outputs and provides diagnostic
Description
information. Integrated clamping circuits, waveshaping, The L9848 IC is a highly flexible monolithic protection against positive and negative voltage medium current output driver that incorporates 2 transients and thermal shutdown for all outputs dedicated low side outputs (outputs 7-8) and 6 open a wide range of automotive and industrial outputs that can be used as either internal low or applications high side drives in any combination (outputs 1-6).
Table 1. Device summary Order code Package Packing
L9848 SO-28 Tube September 2013 Rev 6 1/27 www.st.com 1 Document Outline Table 1. Device summary 1 Block diagram and pin description Figure 1. Block diagram Figure 2. Pin connection (top view) Table 2. Pin description 2 Electrical specifications 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings 2.2 Operation conditions Table 4. Operation conditions 2.3 Thermal data Table 5. Thermal data 2.4 Electrical characteristcs 2.4.1 DC characteristics Table 6. Electrical characteristcs 2.4.2 AC characteristics Table 7. AC characteristics Figure 3. DO loading for disable time measurement Figure 4. Output loading for slew rate measurement Figure 5. Output turn on/off delays and slew rates Figure 6. SPI input/output slew ratest Figure 7. SPI timing diagram 3 Functional description 3.1 General features 3.2 Outputs - Common characteristics 3.2.1 Output 1-4 3.2.2 Output 5-6 3.2.3 Output7-8 3.3 Main power input (VDD) 3.4 Discrete inputs (IN5-6) 3.5 Serial peripheral interface (SPI) 3.5.1 Serial data output (DO) 3.5.2 Serial data input (DI) 3.5.3 Chip select (CS) 3.5.4 Serial clock (SCLK) 3.6 SPI DI input command register Table 8. Bit command register definition Table 9. Command register logic definition 3.7 Fault operation Table 10. Fault register definition Table 11. Fault logic definition 3.7.1 Initial fault register SPI Cycle 3.7.2 Incandescent lamp outputs 3.8 Configuration for Output1-6 3.8.1 Low side drivers 3.8.2 High side drivers 3.9 DRN1-6 susceptibility to negative voltage transients 3.10 Thermal shutdown 3.11 Charge pump usage 3.12 Waveshaping 3.13 POR register initialization 3.14 Abnormal voltage conditions 3.14.1 Reverse Battery 3.14.2 Maximum negative transients 3.14.3 Ground offsets 3.14.4 Loss of ground operation 4 Functional block diagram Figure 8. L9848 with external components 5 Application examples Figure 9. L9848 as mirror axis control motor drivers Figure 10. L9848 as mirror motor and bulb driver Figure 11. L9848 as window lift relay and mirror motor driver Figure 12. L9848 as bipolar stepper motor driver Figure 13. L9848 driving approach for 3 bipolar stepper-motors in sequential mode for climate applications as window lift relay and mirror motor driver 6 Package information Figure 14. SO-28 mechanical data and package dimensions 7 Revision history Table 12. Document revision history