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LB1845 Fiches technique(PDF) 5 Page - Sanyo Semicon Device

No de pièce LB1845
Description  PWM Current Controlling Stepping Motor Driver
Download  9 Pages
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Fabricant  SANYO [Sanyo Semicon Device]
Site Internet  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

LB1845 Fiches technique(HTML) 5 Page - Sanyo Semicon Device

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LB1845
No.5505-5/9
Pin Description
Pin No
Pin
Function
1, 14
VBB
Output stage power-supply voltage
2
13
SENSE1
SENSE2
Set current detection pins.
Connect these pins, fed back through noise filters, to E1 and E2.
3
12
E1
E2
The set current is controlled by the resistors Re inserted between these pins and ground.
4, 11
D-GND
Internal diode anode connection
6
7
8
9
OUT1B
OUT1A
OUT2B
OUT2A
Outputs
15
GND
Ground
27
16
RC1
RC2
Used to set the output off time for the switched output signal.
The fixed off times are set by the capacitors and resistors connected to these pins. toff = CR.
26
17
VREF1
VREF2
Output current settings
The output current is determined by the voltage (in the range 1.5 to 7.5V) input to these pins.
25
18
PHASE1
PHASE2
Output phase switching inputs.
High-level input: OUTA = high, OUTB = low
Low-level input: OUTA = low, OUTB = high
24
19
ENABLE1
ENABLE2
Output on/off settings
High-level input: output off
Low-level input: output on
22, 23
21, 20
I01, I11
I02, I12
Digital inputs that set the output current
The output currents can be set to 1/3, 2/3, or full by setting these pins to appropriate combinations of high and low levels.
28
VCC
Logic block power supply
Timing chart for pin switching operations during PWM drive
Figure 1 Switching Waveforms
toff: Output off time. Determined by external capacitor and resistor Ct and Rt. (toff ≈ Ct × Rt)
td: Delay time between the point the set current is sensed at the SENSE pin and the point the output turns off.
ILB00884
RC pin
E pin
SENSE pin
VOUT pin
td
Spike noise
toff


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