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PDF LB1945H Data sheet ( Hoja de datos )
| Número de pieza | LB1945H | |
| Descripción | Stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : EN6193B
LB1945H
Monolithic Digital IC
PWM Current Control Type
Stepping Motor Driver
http://onsemi.com
Overview
The LB1945H is a PWM current control type stepping motor driver.
Feature
• PWM current control (external excitation)
• Load current digital selection (1-2, W1-2, and 2 phase excitation drives possible)
• Built-in upper/lower diode
• Simultaneous ON prevention function (feed-through current prevention)
• Built-in thermal shutdown circuit
• Built-in noise canceler
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Maximum motor supply voltage
Output peak current
Output continuous current
Logic supply voltage
Logic input voltage range
Emitter output voltage
Allowable power dissipation
VBB max
IO peak
IO max
VCC max
VIN max
VE max
Pd max
tw ≤ 20μs
Mounted on a specified board *
Operating temperature
Topr
Storage temperature
Tstg
* Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board.
Ratings
30
1.0
0.8
6.0
-0.3 to VCC
1.0
1.9
-20 to +90
-55 to +150
Unit
V
A
A
V
V
V
W
°C
°C
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
June, 2013
30409 MS / 82799RM(KI) No.6193-1/7
1 page  
Truth Table
ENABLE
PHASE
LH
LL
H−
OUTA
H
L
OFF
OUTA
L
H
OFF
LB1945H
I1 I2
Output current
L L Vref / (10 × RE) = IOUT
H L Vref / (15 × RE) = IOUT × 2/3
L H Vref / (30 × RE) = IOUT × 1/3
HH
0
Note: Output is OFF when ENABLE = H or when I1 = I2 = H.
Pin Function
Pin No. Pin name
7 VBB1
24 VBB2
5 E1
23 E2
2 OUTA
1 OUTA
27 OUTB
28 OUTB
14 GND
15 S-GND
6 D-GND
22 D-GND
21 CR
13 VREF1
16 VREF2
9 PHASE1
20 PHASE2
10 ENABLE1
19 ENABLE2
12,11
17,18
8
IA1,IA2
IB1,IB2
VCC
Function
Output stage power supply voltage pin.
Cathode pin for the upper-side diodes.
Insert resistor RE between these pins and ground to control set current.
Output pins.
Ground pin.
Sense ground pin.
Lower-side internal diode ground (anode).
Triangular wave chopping with CR constant setting.
Triangular wave OFF time is noise cancel time.
Output current setting pins.
(Output current is set by inputting a 1.5V to 7.5V voltage.)
Output phase select input pin.
High input: OUTA = H, OUTA = L
Low input: OUTA = L, OUTA = H
Output ON/OFF setting input pins.
High input: output OFF
Low input: output ON
Output current setting digital input pins.
Current is set to 1/3, 2/3, 1 by High and Low combinations.
Logic block power supply voltage pin.
No.6193-5/7
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet LB1945H.PDF ] | |
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