LB1847-E SANYO, LB1847-E Datasheet
LB1847-E
Specifications of LB1847-E
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LB1847-E Summary of contents
Page 1
... Stepping Motor Driver Overview The LB1847 is a driver IC for stepping motors with PWM current control bipolar drive (fixed OFF time). A special feature of this IC is that VREF voltage is constant while the current can be set in 15 steps, allowing drive of motors ranging from 1-2 phase exciter types to 4W 1-2 phase exciter types. The current decay pattern can also be selected (SLOW DECAY, FAST DECAY, MIX DECAY) to increase the decay of regenerative current at chopping OFF, thereby improving response characteristics ...
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... DECAY pin current High I DECH Thermal shutdown temperature TSD Logic ON voltage L VSD 1 Logic OFF voltage L VSD 2 ∆L VSD LVSD hysteresis width LB1847 Conditions Conditions +1.0A, sink +1.5A, sink -1.0A, source -1.5A, source sink 0V, source L = 15mH 1.5A, Guaranteed design value * 3.2V 3.2V 3.2V 3.2V ENABLE = 3 ...
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... Package Dimensions unit : mm (typ) 3147C 28 R1.7 1 20.0 26.75 (1.81) 1.78 0.6 1.0 Pin Assignment LB1847 15 14 SANYO : DIP28H(500mil) Pd max -- Ta 25 With infinitely large heat sink Independent Ambient temperature ° LB1847 10.4 1. 100 Top view No.5982-3/15 ...
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... Block Diagram LB1847 No.5982-4/15 ...
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... V REF /3.04RE = Iout Current ratio (%) is the calculated set current value. Current Decay Switching Truth Table Current decay mode DECAY pin SLOW DECAY H FAST DECAY L MIX DECAY L LB1847 Function L H Set current Iout Current ratio 100 95.65 91.30 86.95 82.61 78.26 73.91 69.56 60.87 52 ...
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... Don’t care Note: Iout percentage (%) is the calculated setting value. LB1847 Phase ENA2 PHA2 Iout 17. 26. 34. 43. 52. 60. 69. 73. 78. 82. 86. 91. 95. 100 100 100 100 100 95. 91. 86. 82. 78. ...
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... Switch Timing Chart During PWM Drive SLOW DECAY (upper-side chopping) DECAY pin: High MD pin: Low E pin Output pin RC pin Output pin FAST DECAY DECAY pin: Low MD pin: Low E pin Output pin RC pin Output pin LB1847 t n Switching waveform Noise spike Switching waveform No.5982-7/15 ...
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... MIX DECAY logic setting DECAY pin : L MD pin : 1.5V to 4.0V voltage setting CR voltage and MD pin voltage are compared to select dual-side chopping or upper-side chopping. CR voltage > MD pin voltage: dual-side chopping CR voltage < MD pin voltage: upper-side chopping LB1847 Noise spike off Switching waveform ...
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... SLOW DECAY Current Path Regenerative current during upper-side transistor switching operation Current path at output ON Regenerative current at upper-side transistor OFF FAST DECAY Current Path Current path at output ON Current path at FAST DECAY LB1847 OUT A SBD SBD ON constant Re OUT A SBD SBD ON OFF OFF OUT A ...
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... Rotation angle and composite spectrum are calculated values. LB1847 ° Sequence No OUT Phase A No.5982-10/15 ...
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... Set Current Waveform Model LB1847 Phase A Phase B I OUT PHASE1 PHASE2 I OUT No.5982-11/15 ...
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... RE at pin E, and the ground connection for the Schottky barrier diodes should be in close proximity to the IC ground. The capacitors between V CC and ground, and V BB and ground should be placed close to the V CC and V BB pins, respectively. LB1847 Logic input LB1847 SBD SBD SBD 0.51Ω ...
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... The longer switching OFF time results in higher output current ripple, causing a drop in average current and rotation efficiency. When keeping the switching OFF time within 100 ms recommended to stay within the CR constant range shown in Figure 2. Internal configuration at CR pin LB1847 Sink side Source side 1.9µs 2.2µ ...
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... Switching OFF time and CR setting range (t off time : approx 100µs) C [pF] 3000 2000 1000 LB1847 t off time : 30µs t off time : 50µs 50k 100k t off time : 100µs R [Ω] No.5982-14/15 ...
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... SANYO Semiconductor Co.,Ltd. shall not be liable for any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. This catalog provides information as of February, 2008. Specifications and information herein are subject to change without notice. LB1847 5 Input logic voltage 1,2,3,4 PHA,ENA = V CC typ. ...