L Switch Mode Driver for DC Motors Data Sheet · DRIVERS POUR MOTEUR DC. Legislation and Compliance. RoHS Certificate of Compliance. Statement of. STMicroelectronics L Explore Integrated Circuits (ICs) on Octopart: the fastest source for datasheets, pricing, specs and availability. L Switch-mode Driver For DC Motors. DRIVING CAPABILITY V, 30 KHz 2 LOGIC CHIP ENABLE EXTERNAL LOOP GAIN ADJUSTEMENT SINGLE POWER.
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The output will also be inhibited if the supply voltage falls below 18 V. The second input to each multipler consists of the sign of the first input of the other multiplier datawheet differentiation, these are obtained using the compa- rators C.
Total Drop Out Voltage. This input signals is bidirectional so it must be converted to a positive signal ba. The multiplier outputs, C. The L, L and L are intended to be used as a 3-chip microprocessor controlled positioning sys.
L Datasheet(PDF) – STMicroelectronics
All other trademarks are the property of their respective owners. These inputs may be used for a variety of applications such as motor inhibit during reset of the logical. The current sense resistors R18 and R19 should be high precision types maximum tolerance?
Storage and Junction Temperature. Transfer Function Calculation dattasheet Application Information. The oscillator determines the switching frequency of the output stage and should be in the range 1 to The error signal obtained by the addition of the input and the current feedback signals pin 7 is used to pulse width modulate the oscillator signal by means of the comparator.
The interval between one side of the bridge switching off and the other switching on, t, is programmed by. The enable inputs were implemented in this way because they are intended to be driven directly by a microprocessor. Total Power Dissipation T. This is accomplished by the first stage – the level shifter, which uses an internally generated 8 Datashete reference.
L292 Datasheet PDF
The schematic diagram used for the Laplace analysis of the system is shown in fig. This is accomplished by the first stage – the level shifter. The pulse width modulated sig- nal controls the duty cycle of the Hbridge to give an output current corresponding to the L input signal. The previous linear analysis is correct for this example. In order to achieve good stability, the phase margin must be greater than 45? At the time, the microprocessor orders a switch to the position mode, strobe signal at pin 8 of L and within 3 to 4 ms the L drives ddatasheet motor to a null position, where it is held by electronic “de- tenting”.
This same reference voltage supplies the triangle wave oscillator whose frequency is fixed by the. Currently available microprocessors may generates spikes as high as 1. The oscillator determines the switching frequency of the output stage and should be in the range 1 to 30 KHz. This input signals is bidirectional so it must be converted to a positive signal ba- cause datasheer L uses a single supply voltage The system operates in two modes to achieve high speed, high-accurancy positioning.
Dahasheet this case, during the rise-time of the motor current, The L works is open-loop condition. From this basic input, the microprocessor computes a 5-bit control word that sets the system speed dependent on the distance to travel. This can be foud from: At the time, the microprocessor orders a switch to the adtasheet mode, strobe signal at pin 8 of L and within the L drives the motor to a null position, where it is held by electronic “de-tenting”.
The values shown in the diagram are for a 5. Currently available microproces- sors may generates spikes as high as 1. The above function is performed catasheet amplifying the input signals in A. Input Current pin 6. RC network R20, C17 – pins 11 and 10 where: Small Signal Step Response normalized amplitude vs.
Speed commands for the system originate in the microprocessor. V MB which are fed to the multipliers.
The system operates in two modes to achieve high speed, high-accurancy positioning. In order to be sure that the current loop is stable the following condition is imposed: This publication supersedes and replaces all information previously supplied.
The motor continues to run at rop speed but under closed-loop control. Motor current is regulated by an internal loop in the L which is performed by the resistors R18, R The optical encoder also provides an output datashete one position on the disk which datasheey used to set the initial position.
Datasheet previous linear analysis is correct for this example. Finally, two enable inputs are provited on the L pins 12 and active low and high respectively. The second input to each multipler consists of the sign of the first input of the other multiplier before dif. Input Offset Voltage pin 6. This signals are used by the microprocessor to determine the position by counting the pulses. Using the coparators C. The schematic diagram l2992 for the Laplace analysis of the system is shown in fig.
From this basic input, the microprocessor computes a 5-bit control word that sets the system.