L9826 STMicroelectronics, L9826 Datasheet
L9826
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L9826 Summary of contents
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... Short circuit current limitation and thermal shutdown for outputs 1 and 2 ■ Overcurrent and short circuit shutdown for outputs Description The L9826 is a protected octal low-side driver IC designed for the automotive environment. Table 1. Device summary Order code L9826 L9826TR E-L9826 ...
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... Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2/19 Via parallel, only for output 1 and Via 8-bit SPI for all the outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Diagnostic on Outputs 1 and 2 controlled via NON1/NON2 . . . . . . . . . 15 Diagnostic on Outputs controlled via SPI . . . . . . . . . . . . . . . . . . 15 Flyback current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Current regulation mode outputs 1 and Short circuits outputs Doc ID 7214 Rev 9 L9826 ...
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... L9826 List of tables Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Table 3. Absolute maximum ratings for voltages and currents applied externally to the device Table 4. Absolute maximum ratings for currents determined within the device . . . . . . . . . . . . . . . . . 7 Table 5. Thermal data Table 6. Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Table 7. Outputs control tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Table 8 ...
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... Parallel control for output 1 and 2 (Example for Power-on Figure 5. Output control register structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 6. Timing of the serial interface Figure 7. The pulse diagram to read the outputs status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 8. The structure of the outputs status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 9. SO20 mechanical data and package dimensions 4/19 Doc ID 7214 Rev 9 L9826 ...
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... L9826 1 Block Diagram Figure 1.Block diagram Doc ID 7214 Rev 9 Block Diagram 5/19 ...
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... Description Output 6 Output 1 Asynchronous reset Chip select (active low) Device ground Device ground Control input 1 Serial data output Output 8 Output 3 Output 5 Output 2 Serial data input Serial clock Device ground Device ground Control input 2 Supply voltage Output 7 Output 4 Doc ID 7214 Rev 9 L9826 ...
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... L9826 3 Electrical specifications 3.1 Absolute maximum ratings Table 3. Absolute maximum ratings for voltages and currents applied externally to the device Symbol Parameter V Supply voltage CC Inputs and data lines (NONx, NCS, CLK, SDI, nRes) V Voltage (NONx, NCS, CLK, SDI, nRes Protection diodes current IN Outputs (Out1 ...
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... Guaranteed by SDO design OUTx = OFF OUTx OUTx = OFF OUTx OUTx = OFF OUTx Doc ID 7214 Rev 9 Min. Typ. Max 100 3 - -0.3 - 0.2·V V 0.7· +0 250 - - 0.4 ≤ 100 - - 100 - - 10 L9826 Unit μ μA μA - kΩ μA pF μA μA μA ...
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... L9826 Table 6. Electrical characteristics (continued) Symbol Parameter V Output clamp voltage clp R On resistance OUT 1 ... 8 DSon C Output capacitance OUT Outputs short circuit protection I Overcurrent shutoff threshold SBC I Short circuit current limitation LIM t Delay shutdown SCB Diagnostics V Diagnostic threshold voltage DG Open load detection sink ...
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... NCS pulse filter time 10/19 Test condition - Setup time CLK to NCS change H/L - CLK change H/L after SDI data valid SDI data hold after CLK change H Multiple of 8 CLK cycles inside NCS period Doc ID 7214 Rev 9 L9826 Min. Typ. Max. Unit - - 100 ns 100 - - ns 100 - - ns ...
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... L9826 4 Application information The typical application diagram is shown in Figure 3. Typical application circuit diagram For higher current capability the two outputs of the same kind can be paralleled and the maximum flyback energy should not exceed the limit for a single output. The circuit immunity at output transients have been verified during the characterization with Test Pulses and 3b, DIN40839 or ISO7637 part 3 ...
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... General The L9826 is an 8-channel low-side driver assembled in SO20 package. Its 8-bit SPI serial interface is designed to control all the outputs and to provide their diagnosis. Channels 1 and 2 are controlled either via SPI or via parallel through the inputs pins NON1 and NON2. ...
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... Control data are transmitted to SDI through a microcontroller in configuration master. The device is selected when NCS signal is low. The 8-bit command data are transmitted into L9826 shift registers every CLK falling edge (see The NCS rising edge latches the new data from the shift register to the driver and the output are driven following the commands just sent ...
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... When NCS is low the data contained in the shift register are transferred to SDO output every CLK rising edge. Figure 7. The pulse diagram to read the outputs status register Figure 8. The structure of the outputs status register 14/19 and 8 show the diagnostic bits read out on SDO and their organization Doc ID 7214 Rev 9 L9826 ...
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... L9826 5.3.1 Diagnostic on Outputs 1 and 2 controlled via NON1/NON2 Fault condition (1) "output shorted to Vbat" The output has been previously switched-on and its voltage exceeds the diagnostics threshold. It operates in current regulation mode switched-off if thermal shutdown threshold ( reached. The status bit is low. JSC Fault condition (2) "open load" or "output shorted to GND" ...
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... Outputs which are dedicated for loads without inrush currents. When the output current exceeds the short circuit threshold (I output is switched-off immediately and in the same time, the relative latch store the overload status. 16/19 time, the corresponding output goes in current regulation df ) for at least T sbc Doc ID 7214 Rev 9 L9826 time, the corresponding scb ...
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... L9826 6 Package information In order to meet environmental requirements, ST offers these devices in different grades of ® ECOPACK packages, depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product status are available at: www.st.com. ® ECOPACK trademark. Figure 9. SO20 mechanical data and package dimensions Doc ID 7214 Rev 9 Package information ® ...
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... Revision 7 Initial release in EDOCS Document reformatted. 8 Modify value R in the “Features”. ON Updated Features and Updated Table 1: Device summary on page 9 Updated Figure 3: Typical application circuit Reworked the content of the Doc ID 7214 Rev 9 Changes Description on page 1. 1. diagram. Section 5: Functional description. L9826 ...
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... L9826 Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. ...