SANYO LB1945H_09

Ordering number : EN6193B
Monolithic Digital IC
LB1945H
PWM Current Control Type
Stepping Motor Driver
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
Maximum motor supply voltage
VBB max
Output peak current
IO peak
Output continuous current
IO max
Conditions
tw ≤ 20µs
Ratings
Unit
30
V
1.0
A
0.8
A
Logic supply voltage
VCC max
Logic input voltage range
VIN max
Emitter output voltage
VE max
Allowable power dissipation
Pd max
Operating temperature
Topr
-20 to +90
°C
Storage temperature
Tstg
-55 to +150
°C
Mounted on a specified board *
6.0
V
-0.3 to VCC
V
1.0
V
1.9
W
* Specified board: 114.3mm × 76.1mm × 1.6mm, glass epoxy board.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer' s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer' s products or
equipment.
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30409 MS / 82799RM(KI) No.6193-1/7
LB1945H
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Motor supply voltage
VBB
10 to 28
V
Logic supply voltage
VCC
4.75 to 5.25
V
Reference voltage
VREF
1.5 to 5.0
V
Electrical Characteristics at Ta = 25°C, VBB = 24V, VCC = 5V, VREF = 5.0V
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
Output Block
Output stage supply current
Output saturation voltage
Output leakage current
Output sustain voltage
IBB ON
I1 = 0.8V, I2 = 0.8V, ENABLE = 0.8V
IBB OFF
ENABLE = 3.2V
VOsat1
IO = +0.5A, sink
VOsat2
IO = +0.8A, sink
0.5
0.7
V
VOsat3
IO = -0.5A, source
1.6
1.8
V
VOsat4
IO = -0.8A, source
1.8
2.0
V
IO1(leak)
VO = VBB, sink
IO2(leak)
VO = 0V, source
VSUS
0.5
1.0
0.3
2.0
mA
0.2
mA
0.5
V
50
µA
-50
µA
L = 3.9mH, IO = 1.0A, Design guarantee value *
30
V
ICC ON
I1 = 0.8V, I2 = 0.8V, ENABLE = 0.8V
50
70
92
mA
ICC OFF
ENABLE = 3.2V
7
10
13
mA
Logic Block
Logic supply current
Input voltage
VIH
3.2
V
VIL
Input current
Set current control threshold
IIH
VIH = 3.2V
IIL
VIL = 0.8V
Vref/Vsen
I1 = 0.8V, I2 = 0.8V
value
35
50
0.8
V
65
µA
µA
7
10
13
9.5
10
10.5
I1 = 3.2V, I2 = 0.8V
13.5
15
16.5
I1 = 0.8V, I2 = 3.2V
25.5
30
34.5
25
32.5
Reference current
Iref
Vref = 5.0V, I1 = 0.8V, I2 = 0.8V
17.5
CR pin current
ICR
CR = 1.0V
-1.0
Thermal shutdown temperature
T-TSD
Design guarantee value *
Temperature hysteresis width
Ts hys
µA
mA
170
°C
40
°C
* Design guarantee value, Do not measurement.
No.6193-2/7
LB1945H
Package Dimensions
unit : mm (typ)
3233B
Pd max -- Ta
Allowable power dissipation, Pd max -- W
2.4
HEAT SPREADER
15.2
(6.2)
0.65
7.9
10.5
15
(4.9)
28
1
14
0.8
0.25
0.3
0.1
2.7
2.0
1.9
1.6
1.2
0.91
0.8
0.4
0
-20
2.45max
2.0
(2.25)
(0.8)
Specified board: 114.3×76.1×1.6mm3
glass epoxy board.
0
20
40
60
80
90
100
Ambient temperature, Ta -- °C
SANYO : HSOP28H(375mil)
Pin Assignment
OUTA 1
28 OUTB
OUTA 2
27 OUTB
NC 3
26 NC
NC 4
25 NC
E1 5
24 VBB2
23 E2
D-GND 6
22 D-GND
VBB1 7
LB1945H
VCC 8
21 CR
PHASE1 9
20 PHASE2
ENABLE1 10
19 ENABLE2
IA2 11
18 IB2
IA1 12
17 IB1
VREF1 13
16 VREF2
GND 14
15 S-GND
No.6193-3/7
Blanking
time
22
23
27
Blanking
time
OUTB
24
VBB2
Current
select
circuit
Control
logic
ciruit
19 ENABLE2
20 PHASE2
8 VCC
GND 14
VREF1 13
6
D-GND
5
E1
CR
21
OSC
D-GND
E2
15 S-GND
16 VREF2
18 IB2
28
OUTB
IA2 11
Thermal
shutdown
circuit
7
VBB1
17 IB1
Current
select
circuit
Control
logic
ciruit
2
1
IA1 12
ENABLE1 10
PHASE1 9
OUTA
OUTA
LB1945H
Block Diagram
No.6193-4/7
LB1945H
Truth Table
ENABLE
PHASE
OUTA
OUTA
L
H
H
L
L
L
L
H
H
−
OFF
OFF
I1
I2
L
L
Vref / (10 × RE) = IOUT
H
L
Vref / (15 × RE) = IOUT × 2/3
L
H
Vref / (30 × RE) = IOUT × 1/3
H
H
Output current
0
Note: Output is OFF when ENABLE = H or when I1 = I2 = H.
Pin Function
Pin No.
Pin name
Function
7
VBB1
24
VBB2
Cathode pin for the upper-side diodes.
5
E1
Insert resistor RE between these pins and ground to control set current.
23
E2
2
OUTA
OUTA
OUTB
1
27
Output stage power supply voltage pin.
Output pins.
28
OUTB
14
GND
Ground pin.
15
S-GND
Sense ground pin.
Lower-side internal diode ground (anode).
6
D-GND
22
D-GND
21
CR
Triangular wave chopping with CR constant setting.
Triangular wave OFF time is noise cancel time.
13
VREF1
VREF2
Output current setting pins.
16
9
PHASE1
Output phase select input pin.
20
PHASE2
High input: OUTA = H, OUTA = L
10
ENABLE1
Output ON/OFF setting input pins.
19
ENABLE2
High input: output OFF
(Output current is set by inputting a 1.5V to 7.5V voltage.)
Low input: OUTA = L, OUTA = H
Low input: output ON
12,11
IA1,IA2
Output current setting digital input pins.
17,18
IB1,IB2
Current is set to 1/3, 2/3, 1 by High and Low combinations.
VCC
Logic block power supply voltage pin.
8
No.6193-5/7
LB1945H
Application Circuit Example
1 OUTA
OUTB 28
2 OUTA
OUTB 27
L
0.51Ω(1W)
L
3 NC
NC 26
4 NC
NC 25
5 E1
VBB2 24
6 D-GND
7 VBB1
E2 23
0.51Ω(1W)
D-GND 22
24V
47µF
LB1945H
10µF
82kΩ
CR 21
820pF
Logic input
9 PHASE1
PHASE2 20
10 ENABLE1
ENABLE2 19
11 IA2
IB2 18
12 IA1
IB1 17
Logic input
8 VCC
5V
0.1µF
Voltage from 1.5 to
5V can be applied.
13 VREF1
VREF2 16
14 GND
S-GND 15
The fin on the bottom of HSOP-28H package and the fins between pins 7 and 8 and 21 and 22 should be grounded.
No.6193-6/7
LB1945H
Usage Notes
1. VREF pin
Because the VREF pin is used as reference voltage input pin for the current setting, care must be taken to prevent
noise from affecting the input.
2. GND pin
Because this IC switches large currents, the ground pattern must be designed with care. The fin on the bottom of the
package and the fins between pins 7 and 8 and 21 and 22 should be grounded. Low-impedance patterns should be used
in blocks where large currents flow, and these blocks should be separated from low-level signal blocks. In particular,
the ground of the sense resistor RE at pin E should be located close to the IC ground. Pattern layout should be
designed so that the capacitors between VCC and ground and VBB and ground are close to VCC and VBB.
SANYO Semiconductor Co.,Ltd. assumes no responsibility for equipment failures that result from using
products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition
ranges, or other parameters) listed in products specifications of any and all SANYO Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
malfunction could give rise to accidents or events that could endanger human lives, trouble that could give rise
to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not
limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
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product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
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above.
This catalog provides information as of March, 2009. Specifications and information herein are subject
to change without notice.
PS No.6193-7/7