lv8740v ON Semiconductor, lv8740v Datasheet
lv8740v
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lv8740v Summary of contents
Page 1
... LV8740V Overview The LV8740V is a 2-channel H-bridge driver IC that can switch a stepping motor driver, which is capable of micro-step drive and supports W 1-2 phase excitation, and two channels of a brushed motor driver, which supports forward, reverse, brake, and standby of a motor ideally suited for driving brushed DC motors and stepping motors used in office equipment and amusement applications ...
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... Oscillator frequency Fosc Output short-circuit protection EMO pin saturation voltage Vsatemo CEM pin charge current Icem CEM pin threshold voltage Vtcem LV8740V Conditions Conditions ST = ”L” ”H” ”L”, no load I O =-1mA Design guarantee Design guarantee 2.5A, Upper-side on resistance 2.5A, Lower-side on resistance ...
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... EMO CEM EMM RCHOP MONI STP/DC22 FR/DC21 MD2/DC12 MD1/DC11 VREF LV8740V SIDE VIEW BOTTOM VIEW 0.2 SANYO : SSOP44J(275mil CP2 3 CP1 LV8740V 12 RST GND 22 Top view (7.8) 44 OUT1A 43 OUT1A 42 PGND1 ...
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... Substrate Specifications (Substrate recommended for operation of LV8740V) Size : 90mm × 90mm × 1.6mm Material : Glass epoxy Copper wiring density : Copper wiring pattern diagram Cautions 1) The data for the case with the Exposed Die-Pad substrate mounted shows the values when 90% or more of the Exposed Die-Pad is wet ...
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... Block Diagram LV8740V stage preamplifier Output stage preamplifier Output stage preamplifier Output stage preamplifier Output No.A1864-5/23 ...
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... OUT1B Channel 1 OUTB output pin 36, 37 RF1 Channel 1 current-sense resistor connection pin 38, 39 VM1 Channel 1 motor power supply pin 42 PGND1 Channel 1 Power system ground 43, 44 OUT1A Channel 1 OUTA output pin 26 Connection 40, 41 (No internal connection to the IC) LV8740V Description No.A1864-6/23 ...
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... 23, 24 OUT2B 25 PGND2 28, 29 VM2 30, 31 RF2 32, 33 OUT2A 34, 35 OUT1B 36, 37 RF1 38, 39 VM1 42 PGND1 43, 44 OUT1A GND LV8740V Equivalent Circuit VREG5 GND VREG5 GND Continued on next page. No.A1864-7/23 ...
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... Continued from preceding page. Pin No. Pin 1 VG VREG5 CP2 4 CP1 21 VREF 5 VREG5 8 EMO 12 MONI LV8740V Equivalent Circuit 4 GND VREG5 GND VM GND VREG5 GND Continued on next page. No.A1864-8/23 ...
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... Continued from preceding page. Pin No. Pin 9 CEM 11 RCHOP LV8740V Equivalent Circuit VREG5 GND VREG5 GND No.A1864-9/23 ...
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... VREF input voltage attenuation function ATT1 ATT2 Low Low High Low Low High High High LV8740V Mode Internal regulator Standby Operating Stepping motor channel 1 (CLK-IN) DC motor channel 2 or stepping motor channel 1 (parallel) Operating mode Standby mode Excitation step proceeds Excitation step is kept ...
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... ON a state. When RST is set Low after that, the excitation position proceeds to the next STEP input. (6) Output enable function OE High Low OE Power save mode STEP MONI 1ch output 0% 2ch output Output is high-impedance LV8740V Operating mode Normal operation Reset state RESET Initial state Operating mode Output OFF Output ON No.A1864-11/23 ...
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... Setting the chopping frequency For constant-current control, chopping operation is made with the frequency determined by the external resistor (connected to the RCHOP pin). The chopping frequency to be set with the resistance connected to the RCHOP pin (pin 11 shown below. LV8740V Operating mode Clockwise (CW) CW mode ...
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... Setting current ration in each excitation mode STEP W1-2 phase (%) Channel 1 Channel 2 θ0 0 100 θ θ θ θ4 100 LV8740V Channel 2 current ratio (%) 1-2 phase (%) 1-2 phase full torque (%) Channel 1 Channel 2 Channel 1 0 100 100 0 80 100 2-phase (%) Channel 2 Channel 1 ...
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... Typical current waveform in each excitation mode 2-phase excitation (CW mode) STEP MONI (%) 100 l1 0 -100 (%) 100 I2 0 -100 1-2 phase excitation full torque (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 LV8740V No.A1864-14/23 ...
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... STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 W1-2 phase excitation (CW mode) STEP MONI (%) 100 I1 0 -100 (%) 100 I2 0 -100 LV8740V No.A1864-15/23 ...
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... Above operations are repeated. Normally, the SLOW (+FAST) DECAY mode continues in the sine wave increasing direction, then entering the FAST DECAY mode till the current is attenuated to the set level and followed by the SLOW DECAY mode. LV8740V Set current FAST CHARGE ...
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... When VREF = 1.5V, setting current ratio = 100% [(ATT1, ATT2) = (Low, Low)] and RF resistor = 0.2Ω, the following output current flows : I OUT = 1.5V/5×100%/0.2Ω=1.5A Under such a condition, when assuming (ATT1, ATT2) = (High, High). I OUT = 1.5A×33.3%=500mA LV8740V Output OUT1 (2) B OFF OFF High ...
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... Typical current waveform in each excitation mode when stepping motor parallel input control 2-phase excitation (CW mode) DC11 DC12 DC21 DC22 (%) 100 l OUT 1 0 -100 (%) 100 l OUT 2 0 -100 1-2 phase excitation full torque (CW mode) DC11 DC21 DC12 DC22 (%) 100 l1 0 -100 (%) 100 l2 0 -100 LV8740V No.A1864-18/23 ...
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... EMO pin enters on a state in the following. • When a voltage short, the earth fault or the load is short-circuited and the output short-circuit protection circuit operates, the output pin • When the junction temperature of IC rises, and the overheating protection circuit operates LV8740V State Latch method Auto reset method ...
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... I cannot control the output if there is no pressure voltage of the voltage of the VG pin enough. ST VM+VREG5 VM+4V VM LV8740V Tcem ≈ C × V/I [sec Threshold voltage of comparator TYP CEM charge current TYP 10μA tONG VG Pin Voltage Schematic View VG pin voltage No ...
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... Each constant setting type in the example of the above-mentioned circuit is as follows. When setting current ratio = 100%, VREF = 1.5V, the following output current flows : I OUT = VREF/5/RF resistance = 1.5V/5×100%/0.2Ω=1.5A Chopping frequency setting. 62.5kHz (RCHOP=20kΩ) Time of timer latch when output is short-circuited Tcem = Ccem * Vtcem/Icem = 100pF * 1V/10μA = 10μs LV8740V 1 VG OUT1A OUT1A 43 ...
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... Each constant setting type in the example of the above-mentioned circuit is as follows. When setting current LIMIT = 100%, VREF = 1.5V, the following output current flows : Ilimit = VREF/5/RF resistance = 1.5V/5×100%/0.2Ω=1.5A Chopping frequency setting. 62.5kHz (RCHOP=20kΩ) Time of timer latch when output is short-circuited Tcem = Ccem * Vtcem/Icem = 100pF * 1V/10μA = 10μs LV8740V 1 VG OUT1A OUT1A 43 ...
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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 Novemver, 2010. Specifications and information herein are subject to change without notice. LV8740V PS No.A1864-23/23 ...