E-L9935 STMicroelectronics, E-L9935 Datasheet - Page 5

• Manufacturer Part Number: E-L9935
• Description: IC STEPPER MOTOR DVR 2PH 20PWRSO
• Manufacturer: STMicroelectronics
• Type: 2 Phase Stepper Motor Driverr

Specifications of E-L9935

• Applications: Stepper Motor Driver, 2 Phase
• Number Of Outputs: 1
• Current - Output: ±1.2A
• Voltage - Supply: 8 V ~ 24 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: PowerSO-20 Exposed Bottom Pad
• Product: Stepper Motor Controllers / Drivers
• Operating Supply Voltage: 14.4 V
• Supply Current: 4.5 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L9935
List of figures
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Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General application circuit proposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Typical average load current dependence on R
Displays a full bridge including the current sense circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Principal chopper control circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Pulse diagram to explain offset chopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Normal PWM current versus short circuit current and detection of short to V
SPI data/clock timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Cascading several stepper motor drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Control sequence for 3 Stepper motor drivers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Paralleling several devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
State diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
EMC compatibility for L9935 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
PowerSO20 mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Doc ID 5198 Rev 9
Sense
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S
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