LB11946 Datasheet, PDF (8/14 Pages) Sanyo Semicon Device – PWM Current Control Stepping Motor Driver

LB11946
Current Settings Truth Table * Items in parentheses are defined by the serial data.
IA4
IA3
IA2
IA1
(D0)
(D1)
(D2)
(D3)
1
1
1
1
1
1
1
0
1
1
0
1
1
1
0
0
1
0
1
1
1
0
1
0
1
0
0
1
1
0
0
0
0
1
1
1
0
1
1
0
0
1
0
1
0
1
0
0
0
0
1
1
0
0
1
0
Set current Iout
11.5/11.5 × VREF/3.04RE = Iout
11.0/11.5 × VREF/3.04RE = Iout
10.5/11.5 × VREF/3.04RE = Iout
10.0/11.5 × VREF/3.04RE = Iout
9.5/11.5 × VREF/3.04RE = Iout
9.0/11.5 × VREF/3.04RE = Iout
8.5/11.5 × VREF/3.04RE = Iout
8.0/11.5 × VREF/3.04RE = Iout
7.0/11.5 × VREF/3.04RE = Iout
6.0/11.5 × VREF/3.04RE = Iout
5.0/11.5 × VREF/3.04RE = Iout
4.0/11.5 × VREF/3.04RE = Iout
3.0/11.5 × VREF/3.04RE = Iout
2.0/11.5 × Vref/3.04RE = Iout
Current ratio (%)
100
95.65
91.30
86.95
82.61
78.26
73.91
69.56
60.87
52.17
43.48
34.78
26.08
17.39
Note: The current ratios shown are calculated values.
Block Diagram
OUTA OUTA
VBB
OUTB OUTB
MD
Control
logic
circuit
Control
logic
circuit
D-GND
VREF1
GND
Current
selection
circuit
One-shot
multivi-
brator
Blanking
time
Thermal
shutdown
circuit
Serial-parallel
converter
One-shot
multivi-
brator
Blanking
time
CR1
E1
CLK DATA SET
E2 CR2
Current
selection
circuit
VCC
ST
D-GND
VREF
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