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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Motor current is regulated by an internal loop in the L which is performed by the resistors R18, R This publication supersedes and replaces all information previously supplied.
Total Drop Out Voltage. But for a good stability, from relationship.
These inputs may be used for a variety of applications such as motor inhibit during reset of the logical. The error signal obtained by the addition of the input and the current feedback signals pin 7 is used to. This input signals is bidirectional so it must be converted to a positive signal ba- cause the L uses a single supply voltage This same reference voltage supplies the triangle wave oscillator whose frequency is fixed by the external.
The transfer function is then. The transfer function 3 can be written as follows: It is possible to verify that the L works in “closed-loop” conditions during the entire motor current rise.
The system operates in two modes to achieve high speed, high-accurancy positioning. Datqsheet input signals is bidirectional so it must be converted to a positive signal bacause the L uses a single supply voltage. C17 in conjuction with an internal resistor Rt.
However, STMicroelectronics assumes no responsibility for the consequences. Elcodis is a trademark of Elcodis Company Ltd. Thus the output stage may be inhibited by taking pin 12 high or by taking pin 13 low.
It is possible to synchronize two L ‘s, if desired, using the network shown in fig. Storage and Datashfet Temperature.
The above function is performed by amplifying the input signals in A. The oscillator determines the switching frequency of the output stage and should be in the range 1 to 30 KHz.
The large step signal response is limited by slew-rate and inductive load. Sensing Resistor Voltage Drop. The schematic diagram used for the Laplace analysis of the system is shown fatasheet fig.
Information furnished is believed to be accurate and reliable. The choise of the external components in these RC network pins 5, 7, 9 is determined by the motor type and the bandwidth requirements. In this case, during the rise-time dwtasheet the motor current, The L works is open-loop condition. The output will also be inhibited if the supply voltage falls below 18 V. This can be foud from: The motor continues to run at rop ddatasheet but under closed-loop control.
V MB which are fed to the multipliers. The current sense resistors R18 and R19 should be high precision types maximum tolerance? L The system operates in two modes to achieve high speed, high-accurancy positioning.
L Datasheet | Datasheet Lookup
The braking is applied progressively until the motor is running at minimum speed. This input signals is bidirectional so it must be converted to a positive signal ba.
Input Voltage pin 6. Search field Part name Part description. All other trademarks are the property of their respective owners. At the time, the microprocessor orders a switch to the position mode, strobe signal at pin 8 catasheet L and within the L drives the motor to a null position, where it is held by electronic “de-tenting”. A maxi- mum speed is reached, the tachometer chip output backs off the processor signal thus reducing accel- ering torque.
As the target position is approached, the microproc- essor lowers the value of the speed-demand word; this reduces the voltage at the main summing point, in effect braking the motor. The optical encoder also provides an output at one position on the disk which is used to set the initial position. Inhibit High Level pin 12, Input Voltage pin 6. The main function on the L is to implement the following expression: The “one pulse per rotation” opto encoder output is connected to pin 12 datasheet the L FTF where it is squared to give the STF logic output for the micro- processor.
The enable inputs were implemented in this way because they are intended to be driven directly by a datashewt. The choise of the external components in these RC network pins 5, 7, 9 is determined by the motor type.
The “one pulse per rotation” opto encoder output is connected to pin 12 of the L FTF where it is.
Finally, two enable inputs are provited on the L pins 12 and active low and high respectively. The main function on the L is to implement the.