E-L9935013TR STMicroelectronics, E-L9935013TR Datasheet
E-L9935013TR
Specifications of E-L9935013TR
E-L9935013TR
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E-L9935013TR Summary of contents
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... Two-phase stepper motor driver Description The L9935 is a two-phase stepper motor driver circuit suited to drive bipolar stepper motors. The device can be controlled by a serial interface (SPI). All protections required to design a well protected system (short-circuit, over temperature, cross conduction etc.) are integrated. ...
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... Contents Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 3.3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 5 Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.1 Basic structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5.2 Full bridge function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.3 Protection and diagnosis functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 5 ...
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... L9935 5.14 Test condition for all propagation times . . . . . . . . . . . . . . . . . . . . . . . . . . 21 5.15 Cascading several devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 5.16 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 5.17 Electromagnetic emission classification (EME Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Doc ID 5198 Rev 9 Contents 3/29 ...
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... Table 7. High and low resistive motor (error bits Table 8. Diagnosis description - bit7 and bit6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Table 9. Test condition for all propagation times . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Table 10. Full step mode control sequences and diagnosis response . . . . . . . . . . . . . . . . . . . . . . . . 23 Table 11. Half step mode control sequences and diagnosis response . . . . . . . . . . . . . . . . . . . . . . . 24 Table 12. ...
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... Figure 8. Normal PWM current versus short circuit current and detection of short to V Figure 9. SPI data/clock timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 10. Cascading several stepper motor drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 11. Control sequence for 3 Stepper motor drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 12. Paralleling several devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Figure 13. State diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 14. EMC compatibility for L9935 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 Figure 15 ...
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... Block diagram 1 Block diagram Figure 1. Block diagram 6/29 Doc ID 5198 Rev 9 L9935 ...
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... OUT 12 13 OUT Name Ground. (All ground pins are internally connected to the frame of the GND device). OUT Output1 of full bridge 1 A1 SCK Clock for serial interface (SPI) SDI Serial data input SDO Serial data output VCC 5V logic supply voltage CSN Chip select (Low active) ...
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... Oscillator voltage range, logic output OSC SDO Note: Note: ESD for all pins, except pins SDO, SRA and SRB, are according to MIL883C, tested at 2kV, corresponding to a maximum energy dissipation of 0.2mJ. SDO, SRA and SRB pins are tested with 800V. 3.2 Thermal data Table 4 ...
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... L9935 3.3 Electrical characteristics 8 V ≤ V ≤ -40 °C ≤ Parameters are tested at 125 °C. Values at 140 °C are guaranteed by design and correlation. Table 5. Electrical characteristics Symbol Parameter Supply Total supply current (both bridges Off) I Operating supply current SOP supply current CC Full bridges ...
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... Thermal protection Thermal shut-down T J-OFF Temperature T Thermal pre alarm J-ALM ΔT Margin pre alarm/shut-down MGN 1. Currents of combinations LH and LL are sensed at the external resistors. The Current of bit combination HL is sensed internally and cannot be adjusted by changing the sense resistors. 10/29 Test condition High Low ...
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... Application hints Figure 3. General application circuit proposal C1 and C2 should be placed as close to the device as possible. Low ESR advantageous. Peak currents through C1 and C2 may reach 2 A. Care should be taken that the resonance of C1, C2 together with supply wire inductances is not the chopping frequency or a multiple of it. ...
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... The L9935 is a dual full bridge driver for inductive loads with a chopper current regulation. Outputs A1 and A2 belong to full bridge A Outputs B1 and B2 belong to full bridge B. The polarity of the bridges can be controlled by bit0 and bit3 (for full bridge A, bit3, for full bridge B, bit0). Bit5, bit4 (for full bridge A) and bit2, bit1 (for full bridge B) control the currents ...
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... Full bridge function Figure 5. Displays a full bridge including the current sense circuit. 5.2.1 No current Bit 5, bit 4 (corresponding bit 2 and bit1 for bridge B) both are HIGH, the current logic will inhibit all drivers D signal of the current sense comparator comp 1. 5.2.2 Turning on Changing bit 5 or bit 4 or both to LOW will turn on either M (depending on the phase signal bit 3) ...
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... Both chopping circuits work with offset phase. One chopper will switch on the bridge at the maximum voltage of the oscillator while the other chopper will switch on the bridge at minimum voltage of the oscillator. MS1 and MS2 blank switching spikes that could lead to errors of the current control circuit. Figure 6. Principal chopper control circuit ...
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... To turn on the bridge again a new byte must be written into the interface. (Rising slope of CSN resets the overload error flag). Both bridges use the same flags. To locate which bridge is affected by an error the bridges can be tested individually (One bridge just is turned off to check for the error in the other bridge). 5.4 Short from an output to the supply voltage V The current will be limited by the pulse width modulator ...
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... Reaching a peak current of 1.5 times the maximum PWM current between typically 2 µs and 5 µs after turn on will be detected as a short to V Detecting a short the low side transistor will try to turn on again the next 7 trigger pulse of the oscillator. Simultaneously the error flag will updated on each pulse. ...
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... A. 5.7 Diagnosis of a short to ground Detecting an overload will set an overcurrent error (Error2 = LOW) (bit6). To reset the error flag a new byte must be written into the interface. (Reset of the error flag takes place at the rising slope of CSN). 5.8 Shorted load With a shorted load both, the sink- and the source protection or the PWM alone will respond ...
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... For a high resistive motor this leads to the following consequence: Once a short detected the error flag will persist even if the short is removed again until either a reset (ENN=1) or chopping (for example in 75mA mode) has taken place. We suggest to return to operation once a short to VS was detected by using the low current mode to reset the flag ...
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... stepping rates faster than 1ms/data transfer error flags indicating a short should be used to initiate a pause of at least 1ms to allow the power bridges to cool down again. 5.13 Serial data interface (SPI) The serial data interface itself consists of the pins SCL (serial clock), SDI (serial data input) and SDO (serial data output) ...
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... SCK. Data transfer of the register to SDO takes place at the falling slope of SCK. Rising slope of CSN indicates end of frame. At the end of frame data will only be accepted if modulo 8 bit (modulo 8 falling slopes to SCK) have been transferred. If this is not the case the input will be ignored and the bridges will maintain the same status as before ...
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... Propagation delay SPI to output t pd QXX 1. Measured at a transition from High impedance (Bridge off) to bridge on. (Reversing polarity takes about 1ms longer because the bridge first turns off before turning on in reverse direction). Table of bits bit5,bit4: current range of bridge A (Outputs A1 and A2) ...
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... Cascading several devices Cascading several devices can be done using the SDO output to pass data to the next device. The whole frame now consists of n byte the number of devices used. Figure 10. Cascading several stepper motor drivers Figure 11. Control sequence for 3 Stepper motor drivers Figure 12 ...
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... Motor resistance approximately 10Ω and V Lower resistivity of the motor may lead to detection of short to ground on both branches of the bridge leading to code 10 on all steps. These sequences are intended to give the user a good starting point for his software development. Besides these two there are further possibilities how to implement control sequences for this device (other currents, quarters step etc ...
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... XX011011 11011110 11 XX111011 11011011 01 XX010011 11111011 11 XX010111 11010011 11 XX010010 11010111 11 XX110010 11010010 1. Motor resistance approximately 10Ω and V Lower resistivity of the motor may lead to detection of short to ground on both branches of the bridge leading to code 10 on all steps. 24/29 Error cases and SDObit7, bit6 ( ...
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... Emission (EME) Measurement of Integrated Circuits 1GHz’ of VDE/ZVEI work group 767.13 and VDE/ZVEI work group 767.14 or IEC project number 47A 1967Ed. This data is targeted to board designers to allow an estimation of emission filtering effort required in application. Table 12. ...
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... Functional description Figure 14. EMC compatibility for L9935 26/29 Doc ID 5198 Rev 9 L9935 ...
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... L9935 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 15. PowerSO20 mechanical data and package dimensions Doc ID 5198 Rev 9 Package information ® ...
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... Revision 6 Initial release. Updated at the new corporate template. 7 Corrected the Figure Updated Figure 2: Pin connection (top view) on page 8 Updated Section 6: Package information on page 9 Updated Section 5.10: Open load on page Doc ID 5198 Rev 9 Changes 14. 7. 27. 17. L9935 ...
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