lb1989 Sanyo Semiconductor Corporation, lb1989 Datasheet
lb1989
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lb1989 Summary of contents
Page 1
... Symbol Conditions V max CC V max O V max I1 I max O Pdmax Independent IC Topr Tstg Symbol Conditions V CC Monolithic Digital IC LB1989 [LB1989 0.2 2.7 0.3 15.2 0.8 SANYO: HSOP28 Ratings Unit 14.5 V 14.5 V –0 0 1.0 A 0.6 W –20 to +75 °C –55 to +150 °C Ratings Unit ...
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... Common-mode input voltage range V ICOM Open-loop gain GVPG Output on voltage V OL Output off voltage V OH Schmitt amplifier hysteresis V SHIS Note * : These are design target values and are not measured. LB1989 = Conditions 0.4 A, Source + Sink 0 Source + Sink ...
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... Pin Assignment LB1989 LB1989 No. 6210-3/9 ...
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... Block Diagram (Note that the external constants will vary depending on the motor used.) LB1989 circuit drive Output No. 6210-4/9 ...
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... UIN 9 VIN 10 WIN LB1989 Equivalent circuit Drum motor driver outputs The lowest potential of the drum motor driver output transistors. Constant-current control is implemented by detecting this voltage. The current limiter also operates by detecting this voltage. Driver start/stop control High: Motor drives operating state ...
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... VCOIN PCOUT 15 16 GND 17 VREG LB1989 Equivalent circuit The value of the capacitor connected between this pin and ground determines the operating frequency range and the minimum operating frequency for the VCO circuit. VCO circuit voltage input The PCOUT pin voltage is RC filtered and the result is input to this pin ...
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... Pin voltage 18 PGIN+ 19 PGIN– 20 PGOUT1 21 PGOUT2 22 BFGO LB1989 Equivalent circuit PG amplifier positive (+) input This pin is biased internally by 1/2 VREG. PG amplifier negative (–) input PG amplifier linear output PG Schmitt amplifier output Motor back EMF detection FG output (synthesized from 3 phases) Function Continued on next page. ...
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... Pin No. Pin Pin voltage Allowable Internal Power Dissipation LB1989 Equivalent circuit Independent IC Ambient temperature Ta (°C) Function Frequency characteristics correction Current control system closed loop oscillation can be stopped by inserting a capacitor between this pin and ground. Speed control This IC implements constant-current control by applying feedback from RF ...
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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 December, 1999. Specifications and information herein are subject to change without notice. LB1989 PS No.6210-9/9 ...