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L9935 Datasheet(PDF) 1 Page - STMicroelectronics

Part # L9935
Description  TWO-PHASE STEPPER MOTOR DRIVER
PDF  19 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9935 Datasheet(HTML) 1 Page - STMicroelectronics

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2 X 1.1A FULL BRIDGE OUTPUTS
INTEGRATED CHOPPING CURRENT REGU-
LATION
MINIMIZED POWER DISSIPATION DURING
FLYBACK
OUTPUT
STAGES
WITH
CONTROLLED
OUTPUT VOLTAGE SLOPES TO REDUCE
ELECTROMAGNETIC RADIATION
SHORT-CIRCUIT
PROTECTION
OF
ALL
OUTPUTS
ERROR-FLAG FOR OVERLOAD, OPEN LOAD
AND OVERTEMPERATURE PREALARM
DELAYED CHANNEL SWITCH-ON TO RE-
DUCE PEAK CURRENTS
MAX. OPERATING SUPPLY VOLTAGE 24V
STANDBY CONSUMPTION TYPICALLY 40
µA
SERIAL INTERFACE (SPI)
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, overtemperature,
cross conduction etc.) are integrated.
November 1999
®
COMMON
LOGIC
OSCILLATOR
DIAGNOSTIC
BIASING
DRIVER
LOGIC
DRIVER
LOGIC
~
~
D99AT415
GND
20
1
GND
19
SRA
18
17
OUTA2
16
VS
N.C.
15
OSC
14
CDRV
13
OUTB2
12
SRB
11
GND
OUTA1
2
SCK
3
EN
8
CSN
7
VCC
6
SDO
5
SDI
4
OUTB1
9
GND
10
BLOCK DIAGRAM
PowerSO20
ORDERING NUMBER: L9935
L9935
TWO-PHASE STEPPER MOTOR DRIVER
1/19


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