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 main function on the L is to implement the.
Sensing Rsistor Voltage Drop. The pulse width modulated signal. Motor current is regulated by an internal loop in the L which is performed by the resistors R18, R Frequency Range pin It is possible to synchronize two L ‘s, if desired, using the network shown in fig.
Datashet transfer function 3 can be written as follows: Transfer Function Calculation in Application Information. The choise of the external components in these RC network pins 5, 7, 9 is determined by the motor type.
The module of the transfer function is: Input Offset Voltage pin 6. The “one pulse per rotation” opto encoder output is connected to pin 12 of the L FTF where it is squared to give the STF logic output for the micro- processor. This signals are used by the microprocessor to determine the position by counting the pulses. The current sense resistors R. The interval between one side of the bridge switching off and the other switching on, t, is programmed by.
The output will also be inhibited if the supply voltage falls below 18 V. This same reference voltage supplies the triangle wave oscillator whose frequency is fixed by the. This signals are used by the microprocessor to determine the position by counting the pulses.
The system operates in two modes to achieve high speed, high-accurancy positioning. Motor current is regulated by an internal loop in the L which is performed by the resistors R.
Input Voltage pin 6. These inputs may be used for a variety of applications such as motor inhibit during reset of the datasheer system and power-on reset see fig.
L292 Datasheet PDF
When the motor ratasheet stopped and the microprocessor orders it to a new positio, the system operates initially in an open-loop configuration as there is no feedback from the tachometer generator.
The optical encoder also provides an out. When the motor is stopped and the microprocessor orders it to a new positio, the system operates initially.
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 L, L and L are intended to be used as a 3-chip microprocessor controlled positioning sys.
The above function is performed by amplifying the input signals in A.
L Datasheet PDF –
At the time, the microprocessor orders a switch to the position mode, strobe signal at pin 8 of L and. O292 sign bit represets the direction of motor rotation. This input signals is bidirectional so it must be converted to a positive signal bacause the L uses a single supply voltage. This is accomplished by the first stage – the level shifter, which uses an internally generated 8 V reference.
Finally, two enable inputs are provited on the L pins 12 and active low and high respectively. 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 the motor to a null position, where it is held by electronic “de- tenting”.
All other trademarks are the property of their respective owners. The system operates in two modes to achieve high speed, high-accurancy positioning.
The schematic diagram used for the Laplace analysis of the system is shown in fig. C17 in conjuction with an internal resistor Rt.
Voltage and current characteristics: It is possible to verify that the L works in “closed-loop” conditions during the entire motor current rise. The motor continues to run at rop speed but under closed-loop control. Currently available microproces- sors may generates spikes as high as 1. These inputs may be used for a variety of applications such as motor inhibit during reset of the logical.
Sensing Resistor Voltage Drop. The oscillator determines the switching frequency of the output stage and should be in the range 1 to 30 KHz.