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BA6458FP-Y

Part Number	BA6458FP-Y
Manufacturer	Rohm
Description	3-phase motor driver
Published	Apr 1, 2005
Detailed Description	Motor driver ICs 3-phase motor driver BA6458FP-Y The BA6458FP-Y is an one-chip IC designed for driving video cassette r...
Datasheet	BA6458FP-Y PDF File

Overview

Motor driver ICs 3-phase motor driver BA6458FP-Y The BA6458FP-Y is an one-chip IC designed for driving video cassette recorder cylinder motors.
It is a high-performance IC with a 3-phase, full-wave, pseudo-linear drive system.
The IC is compactly packaged.
FApplications Video cassette recorder cylinder motors FFeatures 1) 3-phase, full-wave, pseudo-linear drive system.
2) Output saturation voltage is low with low variation.
3) Built-in torque limit pin.
FBlock diagram 4) Contains two amplifiers and two hysteresis amplifiers to amplify FG and PG signals.
5) Built-in thermal shutdown circuit.
603 Motor driver ICs FAbsolute maximum ratings (Ta=25_C) BA6458FP-Y FRecommended operating conditions (Ta=25_C) FPin descriptions 604 Motor driver ICs FElectrical characteristics (unless otherwise noted, Ta=25_C, VCC=5V, VM=12V) BA6458FP-Y 605 Motor driver ICs FCircuit operation (1) The 3-phase Hall signal is amplified in the hall amplifiers and sent to the matrix section, where the signal is further amplified and combined.
After the signal is converted to a current in the amplitude control circuit, the current is supplied to the output driver, which then provides a motor drive current.
The phases of the Hall input signal, output voltage, and output current are shown in Fig.
1.
BA6458FP-Y (2) Torque control pin The output current can be controlled by adjusting the voltage applied to the torque control pin (pin 9).
(3) Start / stop pin The motor is in the run mode when the pin input voltage is 3.
5V or more and in the idle mode (all output transistors are off) when the voltage is 1.
2V or less.
(4) Power ground pin (RNF pin) The RNF pin is the output stage ground pin.
Connect a resistor (0.
5Ω recommended) between this pin and the ground to monitor the output current.
(5) Torque limit pin (TL pin) The output current can be limited by applying a voltage to the torque limit pin.
Control is provided so that this pin will have the same potential as the RNF pin.
Note that t...

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