Details, datasheet, quote on part number: L6223
PartL6223
CategoryPower Management => Motor Controller/Drivers => Power Controllers & Motor Drivers
TitlePower Controllers & Motor Drivers
DescriptionDmos Programmable High Speed Unipolar Stepper Motor Driver
CompanyST Microelectronics, Inc.
DatasheetDownload L6223 datasheet
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Features, Applications
DMOS PROGRAMMABLE HIGH SPEED UNIPOLAR STEPPER MOTOR DRIVER

HIGH EFFICIENCY UNIPOLAR STEPPER MOTOR DRIVER HIGH SPEED UNIPOLAR STEPPER MOTOR DRIVER SUPPLY VOLTAGE TO 46V PHASE CURRENT 2A/PHASE IN DUAL CONFIGURATION PARALLEL CMOS P INTERFACE FOR FULL/HALF STEP MOTOR ROTATION SERIAL INTERFACE FOR 6 BIT PROGRAMMING CLOSE/OPEN LOOP, 8 PWM CURRENT LEVELS DUAL PWM FREQUENCY SELECTION INPUT BIDIRECTIONALLY PROTECTED THERMAL SHUTDOWN DESCRIPTION The is a programmable integrated system for driving a unipolar stepper motor. It is realized in Multipower BCD technology. The DMOS output BLOCK DIAGRAM MULTIPOWER BCD TECHNOLOGY

stage, realized by a single upper DMOS switch and four lower DMOS, can deliver to 1A/phase with motor supply voltages to 46V. All inputs are CMOS and microprocessor compatible. An internal 6-bit shift register allows the device to be programmed to select different duty cycles in open loop mode and different chopping frequencies in closed loop mode. When the current control is in closed loop mode it is also possible to select a reduced current chopping level to optimize system efficiency. The L6223 is de-

signed to work with a single sense resistor. During chopping t(OFF) time the current is reduced by half, improving efficiency. Higher current applications can be achieved by paralleling two L6223. ABSOLUTE MAXIMUM RATINGS

Symbol VSS VI VO VOpeak Ipl Iph Ptot Vsense Tstg, Tj Logic supply Supply voltage Logic input voltage Output voltage Output peak voltage (tpk = 5s,10% d.c.) Output sink peak current d.c. 10% t(on) = 10s Output source peak current d.c. = 10s Total power dissipation: Tpins = 90C Tamb = 70C Sensing voltage Storage and junction temperature Parameter Value 0.3V to VSS 1V to VSS 150 C Unit V

The L6223 is mounted a 20-lead Powerdip package, (16+2+2). Four ground leads conduct heat to dedicated heatsink area on the PCB.

* ) Oscillator running 4 cm2 copper area on PCB, see fig. 34

Rthj-pins Rthj-amb Thermal Resistance Junction-pins Thermal Resistance Junction-ambient Max 14 60 C/W

No. 18,19 3 Name OUT2,OUT1 OUT4,OUT3 BSTP Outputs for motor windings. A bootstrap capacitor connected between this pin and COM will generate the internal overvoltage required for driving the gate of the upper DMOS. Output for common wire of motor. Common ground. Also provides heatsinking to PCB. Power supply Digital input. 1) In PROGRAM MODE,operates in XOR with DA/OPLO to load data into 6-bit shift register. 2) In OPERATING MODE,works with the other digital inputs to reduce the current level (see Table 2 and Table 3). 9 DA/OPLO Digital input. 1) In PROGRAM MODE, operates in XOR with DA/CLEV to load data into 6-bit shift register. 2) In OPERATING MODE,selects current control method: open loop (H) or closed loop (L). Digital inputs. When all inputs are low level,the device is in PROGRAMMING MODE. In OPERATING MODE: 1) FULL MODE to IN4 drive the motor phases. A previous programming is requested. 2) SIMPLIFIED MODE - IN1 and IN2 drive the phases,IN3 is ENABLE, IN4 works with DA/CLEV to enable the reduce current level. Previous programming not needed. 20 RC VSS SENSE Input for external RC network. Defines the higher of two possible chopping frequencies. If this pin is set to ground it will reset the IC. Logic supply. Output for sense resistor. Function


 

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