The LB11948T is a low saturation voltage output PWM current control bipolar drive stepping motor driver. It is
optimal for use as the driver for the miniature low-voltage stepping motors used in portable electronic equipment such
as portable thermal printers.
Features
•
PWM current control (external excitation)
•
Simultaneous on state prevention function (through current prevention)
•
Thermal shutdown circuit
•
Noise canceller function
•
Low-power mode control pin
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
VS supply voltage
Logic system supply voltage
Peak output current
Continuous output current
Emitter output voltage
Input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Note * : Specified PCB : 114.3×76.1×1.6mm
Symbol
VS
VCC
IO peak
IO max
VE
VIN
Pd max
Topg
Tstg
Mounted on the specified PCB*
tW
≤
20μS
Conditions
Ratings
-0.3 to
+18
-0.3 to
+18
0.5
0.4
1.0
-0.3 to VCC
1.2
-20 to
+85
-40 to
+150
Unit
V
V
A
A
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
D2607 MS PC 20060201-S00001/N2206/D1504TN(OT)/81004TN(OT) No.7947-1/13
LB11948T
Recommended Operating Conditions
at Ta = 25°C
Parameter
VS supply voltage
VCC supply voltage
Reference voltage
Symbol
VS
VCC
VREF
VCC
≤
4V
VCC
>
4V
Conditions
Ratings
3.0 to 15
3.0 to 15
0.0 to 1.0
0.0 to 1.5
Unit
V
V
V
V
Electrical Characteristics
Ta = 25°C, VS = VCC = 5V, VREF = 0.3V
Parameter
[Output Block]
VS system supply current
IVS OFF
IVS ON
IVS wt
Output saturation voltage 1
Output saturation voltage 2
Output saturation voltage 3
Output saturation voltage 4
Output leakage current
VO (sat) 1
VO (sat) 2
VO (sat) 3
VO (sat) 4
IO1 (leak)
IO2 (leak)
Upper and lower side output diodes
Forward voltage 1 (upper side)
Forward voltage 2 (lower side)
[Logic Block]
VCC system supply current
ICC OFF
ICC ON
ICC wt
Input voltage
VI on
VI off
Input current
Reference voltage : 1V
Current setting reactive current
Reference current
CR pin current 1
CR pin current 2
Sense voltage 1
Thermal shutdown temperature *
Note * : Design guarantee value
IIN
V1V
IE
IREF
ICR1
ICR2
VSEN1
TS
VREF = 0.3V, VE = 0.3V
CR = 0.5V
CR = 3V
VREF = 0.5V
*
VIN = 5V
IO = 1mA
70
0.95
-22
-1
-2
1.65
0.475
2.2
0.5
170
2.75
0.525
100
1
-17
PH1 = PH2 = 0V, EN1 = EN2 = 3.0V, ST = 3.0V
PH1 = PH2 = EN1 = EN2 = 0V, ST = 3.0V
PH1 = PH2 = EN1 = EN2 = ST = 0V
2.0
0.8
130
1.05
-10.5
6.5
7
10
11
13.5
15
1
mA
mA
μA
V
V
μA
V
mA
μA
μA
mA
V
°C
VF1
VF2
I = 400mA
I = 400mA
0.9
0.9
1.1
1.1
1.3
1.3
V
V
PH1 = PH2 = 0V, EN1 = EN2 = 3.0V, ST = 3.0V
PH1 = PH2 = EN1 = EN2 = 0V, ST = 3.0V
PH1 = PH2 = EN1 = EN2 = ST = 0V
IO = +0.2A (source)
IO = +0.4A (source)
IO = -0.2A (sink)
IO = -0.4A (sink)
VO = VBB (sink)
VO = 0V (source)
-50
0.2
0.3
0.2
0.3
28
40
5
52
1
0.4
0.5
0.4
0.5
50
μA
mA
μA
V
V
V
V
μA
μA
Symbol
Conditions
min
Ratings
typ
max
Unit
Truth Table
Channel 1
Input
ST
H
H
H
L
PHASE1
L
H
*
*
Input
ENABLE1
L
L
H
*
OUT1-
H
L
OFF
OFF
Output
OUT1
L
H
OFF
OFF
PHASE2
L
H
*
*
Input
ENABLE2
L
L
H
*
OUT2-
H
L
OFF
OFF
Channel 2
Output
OUT2
L
H
OFF
OFF
Note * : Levels shown as an asterisk (*) can be set to be either high or low.
No.7947-2/13
LB11948T
Package Dimensions
unit : mm (typ)
3259
1.4
9.75
30
16
Pd max -- Ta
Specified PCB : 114.3×76.1×1.6mm
PCB material : glass epoxy
Allowable power dissipation, Pd max – W
1.2
1.0
5.6
7.6
0.8
0.62
0.5
0.6
1
0.65
(0.33)
0.22
15
0.15
0.4
(1.0)
1.2max
0.2
0
–
20
0.08
0
20
40
60
80 85
100
Ambient temperature, Ta – °C
SANYO : TSSOP30(275mil)
Pin Assignment
Top view
No.7947-3/13
LB11948T
Pin Functions
Pin No.
1
2
3
4
5
6
Pin Name
OUT1-
OUT1
NC
NC
D-GND
E1
Output
Output
Unused
Unused
Lower side internal diode anode connection
Constant current control sensing
The motor current is set by the value of the sensing resistor Re connected between the E1 pin and ground.
The current is set according to the following equation : IO = VREF/Re (A)
7
8
9
10
11
12
13
14
VS1
NC
VCC
CR
VREF1
NC
ENABLE1
PHASE1
VS power supply
Unused
VCC power supply
RC oscillator connection
Current setting system reference voltage input
VREF1 voltage range : 0 to 0.5V
Unused
Output is turned on when ENABLE1 is low, and the output is turned off (operating state) when ENABLE1 is high.
Logic level input : phase switching
When PHASE1 = high : Output pin states : OUT1 : high, OUT1- : low.
When PHASE1 = low : Output pin states : OUT1 : low, OUT1- : high.
15
ST
Standby mode setting
When ST = high : the IC operates in normal operating mode.
When ST = low : the IC operates in standby mode. The VS and VCC current drain levels are under 1μA in this mode.
16
17
NC
1VREG
Unused
1V regulator circuit output
The LB11948 includes an internal 1V regulator circuit, and this pin is the output from that circuit. The VREF1 and VREF2
reference voltages can be set by voltage dividing the 1V regulator output.
18
PHASE2
Logic level input : phase switching
When PHASE2 = high : Output pin states : OUT2 : high, OUT2- : low.
When PHASE2 = low : Output pin states : OUT2 : low, OUT2- : high.
19
20
21
22
23
24
25
ENABLE2
VREF2
GND
PGND
NC
VS2
E2
Output is turned on when ENABLE2 is low, and the output is turned off (operating state) when ENABLE2 is high.
Current setting reference voltage input
VREF2 voltage range : 0 to 0.5V
Ground (small signal circuit system ground)
Power system ground (high current circuit system ground)
Unused
VS power supply
Constant current control sensing
The motor current is set by the value of the sensing resistor Re connected between the E2 pin and ground.
The current is set according to the following equation : IO = VREF/Re (A)
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