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SI-7321M 数据表(PDF) 1 Page - Sanken electric

部件名 SI-7321M
功能描述  Unipolar 2-Phase Microstepping Motor Driver IC
Download  19 Pages
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制造商  SANKEN [Sanken electric]
网页  http://www.sanken-ele.co.jp/en
标志 SANKEN - Sanken electric

SI-7321M 数据表(HTML) 1 Page - Sanken electric

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SANKEN ELECTRIC CO., LTD.
http://www.sanken-ele.co.jp/en/
SI-7321M
Description
The SI-7321M constant-current mode motor driver IC features
efficient unipolar driver design for full- and half-step operation,
and 1/4, 1/8, and 1/16 microstepping. The clock-in type input
interface allows simplified control logic, with the flexibility of
sequencer timing using either rising Clock edge only or both
rising and falling edges. Additional flexibility is provided by
user-configurable blanking time, and load circuit short or open
protection (patents granted in Japan and the U.S.A.). Along
with inputs for built-in sense current detection, these features
minimize power losses.
The device has a multi-chip internal structure for lower thermal
resistance. The control IC (MIC) and the four power elements
(MOSFET) are all separate ICs. The package (HSOP) provides
wide output terminals at each corner, further enhancing device
thermal dissipation.
The built-in excitation distribution circuit (sequencer) allows
motor control using only the Clock signal for simple operations
(forward, reverse, hold), with motor speed control by frequency
inputintoClockpin,androtationdirectioncontrolbyadedicated
logic input. This eliminates logic signal lines required for
conventional phase-input methods, and reduces demand on
heavily-used CPUs.
Low-power sleep mode, as well as reduced power during PWM
off-time maximize energy savings.
Features and Benefits
▪ Power supply voltage, VBB , 46 V maximum, 10 to 44 V
normal operating range
▪ 18.6 × 9.9 mm package footprint
▪ Logic supply voltage, VDD , 3.3 to 5.5 V
▪ Maximum output current: 1.5 A
▪ Four NMOS output MOSFETs, RDS(on) = 0.25 Ω typical
▪ Built-in sequencer
▪ Simplified clock-in stepping control
▪ Full- and half-stepping and 1/4, 1/8, and 1/16 microstepping
▪ Surface mount type 44-pin molded package for automatic
assembly and low profile
▪ Self-excitation PWM current control with fixed off-time
▪ Microstepping off-time adjusted automatically by step
Unipolar 2-Phase Microstepping Motor Driver IC
Functional Block Diagram
Package: 44-pin HSOP surface mount
Not to scale
Continued on the next page…
Sequencer
and
Sleep Circuit
Synchro
Control
PWM
Control
OSC
Comp
+
-
DAC
Pre-
Driver
PWM
Control
OSC
DAC
Pre-
Driver
Comp
+
-
MIC
Reg.
43 44 1
438
6
7
8
9
10
11
12
13
14
15
16
17
31
29
20
21 22 23
Protect
Protect
41
2
3
40
5
27
18
19
28 39
30
32
33
34
35
36
37
24
26
25
42
28210.05


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