lb1955 Sanyo Semiconductor Corporation, lb1955 Datasheet
lb1955
Related parts for lb1955
lb1955 Summary of contents
Page 1
... Ordering number :EN5452 Functions • The LB1955 is a 3-phase brushless motor driver IC that is optimal for applications such as driving the drum motor in VCRs. Ambient temperature, Ta – °C Specifications Absolute Maximum Ratings 25°C Parameter Maximum supply voltage Maximum output current Allowable power dissipation ...
Page 2
... Thermal shutdown TTSD Design target operating temperature Thermal shutdown TSD Design target temperature hysteresis width Note provided for when X is the peak value at the 60° position of the lower side of the U LB1955 = Conditions = 0 V, LCTR = 400 mA Sink side = ...
Page 3
... However, note that an input potential difference corresponding to the Hall to output gain is required. Timing Charts Hall inputs Synthesized waveform Note: The Hall inputs are defined as follows Inputs to the Hall input pins must be applied in the phase order shown in the timing chart. LB1955 Hall input logic ...
Page 4
... Note: Note that the intersections between the special magnetization and general waveforms and the intersections between pairs of general waveforms must be set 30° apart. Hall Input Order Hall input Note: The Hall input order must be set LB1955 Function < ...
Page 5
... Rf resistor, set the current limit to an appropriate value by applying to the LIM pin a voltage that is divided from the V to ground potential by resistors of a few k . Alternatively, short the LIM pin to V REF function. PG and FG Pin Output Circuits LB1955 LIM pin: Open VG – Rf: Shorted Gm = 0.423/Rf (A/V) (Closed loop control gain) Ilim = (V 27/200 – ...
Page 6
... Block Diagram LB1955 FG waveform synthesis PG waveform synthesis Internal power supply No. 5452-6/7 ...
Page 7
... 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 July, 1997. Specifications and information herein are subject to change without notice. LB1955 LB1955 No. 5452-7/7 ...