LB1854 Sanyo, LB1854 Datasheet
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LB1854
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LB1854 Summary of contents
Page 1
... Ordering number : EN4476B Overview The LB1854M is a three-phase brushless motor driver IC and is optimal, in particular, for driving VCR capstan and drum motors. Features • 120° voltage linear drive technique • The LB1854M soft switching scheme allows smaller external capacitors to be used (e.g., chip capacitors). ...
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... Phase margin ∆Vsh1 Schmitt hysteresis ∆Vsh2 Schmitt input voltage range Vsh CH [Thermal Shutdown] Operating temperature TSD ∆TSD Hysteresis Note: * Items marked with an asterisk are design target values and are not measured. LB1854M Conditions = ∞ ...
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... Pin Assignment Block Diagram Sample Application Circuit LB1854M Unit (resistance: Ω, capacitance: F) No. 4476-3/6 ...
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... The gain frequency characteristics can be lowered by connecting a capacitor between this pin and ground to prevent oscillation. Speed control The LB1854M implements a voltage control scheme in which the output voltage is controlled by the pin 5 voltage. The pin 4 voltage determines the control start voltage. Power supply that provides the drive outputs ...
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... OUT OUT LB1854M Equivalent circuit Output pins Output transistor ground Feedback can be applied to the control amplifier by inserting resistor between this pin and GND and detecting the output current as a voltage. The overcurrent protection circuit (current limiter) operates by detecting the voltage on this pin. ...
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... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provides information as of November, 1997. Specifications and information herein are subject to change without notice. LB1854M Equivalent circuit FG signal input Motor forward/reverse control pin Low level (0 ...