TECHNICAL NOTE
Motor Driver IC Series for Printers
DC Brush Motor Driver
for Paper Feed or Carriage Use
BA6920FP-Y, BA6219BFP-Y
●Description
The BA6920FP-Y and BA6219BFP-Y are full-on drivers for motors with DC brushes. They operate in forward rotation mode, reverse rotation
mode, stop (idling) mode, or brake mode, that are selectable according to the input logic (two inputs). The output voltage can be set through
the output voltage setting pin.
●Features
1) Large output current. (BA6219BFP-Y)
2) Built-in thermal shutdown circuit
3) The output voltage can be set flexibly through the output voltage setting pin.
4) Built-in standby (stop) circuit. (BA6920FP-Y)
●Applications
Devices that use DC brush motors, such as photo printers, scanners, mini printers, and fax machines.
●Absolute
maximum ratings
Parameter
Symbol
VCC1, 2,
Applied voltage
VM, VCC
Power dissipation
Operating temperature range
Storage temperature range
Output current
Junction temperature
** Must not exceed Pd or ASO.
500μs pulses at a duty of 1/100.
Pd
Topr
Tstg
IOmax
Tjmax
-
*1450
-25½+75
-55½+150
2200**
150
36
*1450
-30½+85
-55½+150
1000**
150
V
mW
℃
℃
mA
℃
24
Limit
BA6219BFP-Y
BA6920FP-Y
-
V
Unit
* Reduced by 11.6 mW/°C over 25°C, when mounted on a glass epoxy board (70 mm
×
70 mm
×
1.6 mm).
●Operating
conditions
BA6219BFP-Y
Parameter
Power supply voltage
BA6920FP-Y
Parameter
Power supply voltage
Symbol
V
CC
VM
Operating voltage
6.5½34
6.5½34
Unit
V
V
Symbol
V
CC
1,2
Operating voltage
8½18
Unit
V
Ver.B Oct.2005
●Electrical
characteristics
BA6219BFP-Y (Unless otherwise specified, Ta=25°C, VCC1=12 V, VCC2=12 V)
Parameter
Circuit current 1
Circuit current 2
Circuit current 3
High-level input voltage
Low-level input voltage
VR bias current
CD1 constant-current value
CD2 constant-current value
Output leak current
FOUT high output voltage
FOUT low output voltage
ROUT high output voltage
ROUT low output voltage
Symbol
ICC1
ICC2
ICC3
VIH
VIL
IVREF
ICD1
ICD2
IOL
VHF
VLF
VHR
VLR
Limit
Min.
-
-
-
3.0
0
0.6
0.7
0.7
-
6.5
-
6.5
Typ.
1.2
16
25
-
-
1.2
1.5
1.5
-
-
-
-
-
Max.
2.5
35
60
VCC
1.0
2.4
3.0
3.0
1
-
1.2
-
1.2
Unit
mA
mA
mA
V
V
mA
mA
mA
mA
V
V
V
V
RL=60Ω
(IN1, IN2) = (H, L): Current from CD1 to GND
(IN1, IN2) = (H, L): Current from CD2 to GND
(IN1, IN2) = (L, L): Current flowing into VCC2
RL=60Ω VR=6.8V
RL=60Ω VR=6.8V
RL=60Ω VR=6.8V
RL=60Ω VR=6.8V
Standby mode (stop)
Forward rotation or reverse mode
Brake mode
Conditions
BA6920FP-Y (Unless otherwise specified, Ta=25°C, VCC1=12 V, VM=12 V)
Parameter
Circuit current 1
Circuit current 2
Circuit current
during standby mode
High-level input voltage
Low-level input voltage
High-level input current
Output saturation voltage
Power saving off voltage
Power saving on voltage
REF bias current
Symbol
ICC1
ICC2
IST
VIH
VIL
IIH
VCE
VPS OFF
VPS ON
IREF
Limit
Min.
5
3
-
3.0
-
100
-
-
2.0
Typ.
8
5
-
-
-
200
2.2
-
-
12
Max.
12
8
15
-
0.8
300
3.3
0.8
-
35
Unit
mA
mA
μA
V
V
μA
V
V
V
μA
VIN=3.0V
Io = 200 mA: Total voltage of both high and low sides
of output transistor
Operating mode
Standby mode
VREF=6V,Io=100mA
Conditions
Forward rotation or reverse mode
Brake mode
Standby mode
●I/O
Logic table
BA6219BFP-Y
IN1
H
L
H
L
BA6920FP-Y
FIN
H
L
H
L
Don't Care
RIN
L
H
H
L
Don't Care
POWER SAVE
L
L
L
L
H
OUT1
H
L
L
OPEN
(Hi-Z)
OPEN
(Hi-Z)
OUT2
L
H
L
OPEN
(Hi-Z)
OPEN
(Hi-Z)
Mode
Forward rotation
Reverse rotation
Brake
Stop
Power saving mode
(Output stop)
IN2
L
H
H
L
OUT1
H
L
L
OPEN(Hi-Z)
OUT2
L
H
L
OPEN(Hi-Z)
Mode
Forward rotation
Reverse rotation
Brake
Stop
Note: When the POWERSAVE pin is at high level, OUT1 and OUT2 will be open regardless of the FIN or RIN logic.
2/8
●
Reference data
2
Circuit Current:Icc1[mA]
30
IN1=IN2=L
VCC1=VCC2
Circuit current :Icc2[mA]
1.5
Circuit current:Icc3[mA]
-25℃
25
20
15
10
5
0
IN1=L, IN2=H
VCC1=VCC2
-25℃
40
IN1=IN2=H
VCC1=VCC2
-25℃
30
1
75℃
25℃
20
75℃
25℃
25℃
75℃
0.5
10
0
8
10
12
14
16
18
0
8
10
12
14
16
18
8
10
12
14
16
18
Supply Voltage:Vcc[v]
Supply Voltage :Vcc[v]
Supply Voltage:Vcc[v]
Fig. 1 Circuit current 1 (Standby)
(BA6219BFP-Y)
Fig. 2 Circuit current 2 (Reverse rotation)
(BA6219BFP-Y)
Fig. 3 Circuit current 3 (Brake)
(BA6219BFP-Y)
15
12
Circuit current:Icc1[mA]
Circuit current:Icc2[mA]
12
9
Output H Voltage:VOH[V
FIN=H, RIN=L
VCC=VM
-30℃
25℃
15
FIN=H, RIN=H
VCC=VM
7.5
VCC1= VCC2=12Ｖ
VREF=6.8V
7.25
9
6
75℃
7
-30℃
6
3
25℃
-25℃
85℃
3
0
5
10
15
20
25
30
35
6.75
25℃
85℃
0
5
10
15
20
25
30
35
6.5
0
0.5
1
1.5
2
Supply Voltage:Vcc[v]
Supply Voltage:Vcc[v]
Output Current:Iout[A]
Fig. 4 Circuit current 1 (Forward rotation)
(BA6920FP-Y)
Fig. 5 Circuit current 2 (Brake)
(BA6920FP-Y)
Fig. 6 High Output vs Output Current
(BA6219BFP-Y)
-0.1
2.4
Output L Voltage:VOL[V
Output H Voltage:VOH[V]
Output L Voltage:VOL[V]
2.0
1.6
1.2
0.8
0.4
0.0
VCC1=VCC2=12V
VREF=5V
75℃
1.4
1.2
1.0
0.8
-0.5
-0.9
75℃
85℃
-1.3
-1.7
25℃
-25℃
25℃
0.6
0.4
0.2
0.0
25℃
-30℃
-30℃
-2.1
0
0.2
0.4
0.6
0.8
1
0
0.5
1
1.5
2
0
0.2
0.4
0.6
0.8
1
Output Current:Iout[A]
Output Current:Iout[A]
Output Current:Iout[A]
Fig. 7 High Output vs Output Current
(BA6920BFP-Y)
Fig. 8 Low Output vs Output Current
(BA6219BFP-Y)
Fig. 9 Low Output vs Output Current
(BA6920AFP-Y)
●
Pin assignment
BA6219BFP-Y
(GND)
OUT1
OUT2
VREF
RIN
N.C.
GND
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
N.C.
(GND)
POWER SAVE
FIN
VCC
VM
N.C.
BA6920FP-Y
FIN
GND
VCC1
VCC2
N.C.
CD2
FIN
N.C.
N.C.
IN2
N.C.
N.C.
GND
N.C.
GND
OUT1
N.C.
N.C.
N.C.
N.C.
CD1
N.C
OUT2
RNF
IN1
(GND)
Fig.10
Fig.11
3/8
(GND)
FIN
FIN
N.C.
VR.
N.C
N.C.
N.C.
N.C.
N.C.
N.C.
●
Block diagram
BA6219BFP-Y
③Current
limiting resistor
BA6920FP-Y
③Current
limiting resistor
-
1½100μF
+
5½10Ω
④
VR
ZD
IN1
LOGIC
IN2
VCC1
VCC2
①For
preventing upper and
lower transistors from tur-
ning on simultaneously
POWER
0.01½1μF
SAVE
0.1μF
CD1
RIN
LOGIC
-
1½100μF
+
VCC1
5½10Ω
VM
POWER
CONTROL
FIN
TSD
OUT2
CD2
0.1μF
②For
output
oscillation
prevention
0.01½0.1μF
GND
CONTROL
OUT1 MOTOR
0.01μF
OUT1 MOTOR
0.01μF
OUT2
TSD
GND
①For
preventing upper and
lower transistors from
turning on simult-
aneously 0.01½1μF
VREF
RNF
④
ZD
Fig.12
②For
output
oscillation
prevention
0.01½0.1μF
Fig.13
●Explanation
of external components
①
Capacitors that prevent upper and lower transistors from turning on simultaneously (Capacitors to connect to CD1 and CD2 pins in the
case of BA6219BFP-Y).
The rising of the base potential of the transistor at high-level output is delayed to prevent both transistors from turning on simultaneously.
Set the capacitance between 0.01
μ
F and 1
μ
F and ensure that a penetration current does not flow during output mode changes, since
the transistors do not turn on simultaneously.
②
Capacitor for output oscillation prevention
The output pin may generate noise or oscillate, depending on the set mounting conditions, such as the power supply circuit, motor
characteristics, and PCB pattern artwork. Connect a capacitor with a capacitance value of 0.01
μ
F to 0.1
μ
F to prevent noise oscillation.
③
Resistance for current limiting
A resistor used to prevent collector loss and limit the current of output shorting. Although the required resistance varies with the supply
voltage, a resistance of approximately 5Ω to 10Ω should be selected. When designing the circuit, pay utmost attention to voltage
reduction resulting from a rush current that flows when the driving of the motor starts.
④
Zener diode for output voltage setting
Zener diode for high output voltage VR (VREF) setting. The zener voltage can be set almost equal to high output voltage.
BA6219BFP-Y
PIN No.
2
4
6
7
8
10
11
13
15
19
20
24
FIN
Pin Name
CD1
VR
IN1
GND
IN2
VCC1
VCC2
CD2
OUT2
GND
GND
OUT1
GND
Function
Capacitor connection pin for prevention of
upper and lower transistors to turn on
simultaneously
High output voltage setting pin
Logic input pin
GND
Logic input pin
Power supply pin for small signal block
Power supply pin for motor output
Capacitor connection pin for prevention of
upper and lower transistors to turn on
simultaneously
Motor output pin
GND
GND
Motor output pin
Note: Be sure to connect the heat
dissipation fin to the GND pin.
BA6920FP-Y
Pin No
5
6
8
9
16
17
18
19
20
21
FIN
Pin name
OUT2
RNF
GND
OUT1
VM
Vcc
FIN
POWER
SAVE
RIN
VREF
GND
Function
Motor output pin
Connection pin for output current
detection on the GND pin of the
output block
GND
Motor output pin
Motor power supply
Power supply pin
Logic input pin
Power saving input pin
Logic input pin
High output voltage setting pin
Note: Be sure to connect the heat
dissipation fin to the GND pin.
Note: Pins 1 to 4, 7, 10 to 14, and 20 to 24 are NC pins.
Note: Pins 1, 3, 5, 9, 12, 14, 16 to 18, 21 to 18, 21 to 23, and 25 are NC pins.
4/8
●IC
Operation
BA6920FP-Y(BA6219BFP-Y)
1) I/O mode of input block FIN (IN1) and RIN (IN2)
A pin where control signals are input. Each mode operates as explained below.
When the FIN (IN1) is set to high and RIN (IN2) is set to low, the forward rotation mode will be set and a current will flow from OUT1 to
OUT2. When the FIN (IN1) is set to low and RIN (IN2) is set to high, the reverse rotation mode will be set and a current will flow from
OUT2 to OUT1. When both FIN (IN1) and RIN (IN2) are set to high, the brake mode will be set. At that time, the output transistor on the
high side will be turned off to stop the supply of the motor drive current while the output transistor on the low side will be turned on to
absorb the motor back EMF to brake the motor. When both FIN (IN1) and RIN (IN2) are set to low, OUT1 and OUT2 will be both open
potential and the motor will stop.
2) High output voltage setting function
With this function, the output voltage can be set through the high output voltage setting pin in order to control the rotation speed of the
motor. If the high output voltage is set to a lower value, the power consumption of the IC will become high. Consider the power
dissipation (Pd) of the IC under actual operating conditions, and implement thermal designing with a sufficient margin.
2-1. BA6219BF-Y (See Fig.14)
High output voltage is expressed by the following equation.
VoutH (high output voltage) = VR + {VF(Q5) + VF (Q6) + VF (Q7) - VF (Q2) -VF (Q3) - VF (Q4)}
≒VR
+ΔVF
(VF is the base-emitter voltage in the forward direction)
Although
ΔVF
depends on the output current, Vo is almost VR.
The maximum value VoutHmax of high output voltage that can be set is as follows.
VoutHmax < VCC1 - Vsat (Q1) - VF (Q2) - VF (Q3) - VF (Q4)
≒VCC1
- 2.5 V
Relation of VCC1, VCC2, and VR
VCC1, VCC2, and VR should be set as follows.
VR < VCC2 - Vsat (Q3) + VF (Q3) + VF (Q2) - {VF (Q5) + (Q6) + (Q7)}
≒VCC2
- 1 V
Operating Conditions
Pin
VCC1
VCC2
VR
Voltage
8
½
18
8
½
18
Shown above
Unit
V
V
-
VR (VREF) voltage
High output voltage
VCC1
VCC2
Q1
Q2
Q3
Q5
Q6
Q7
Q4
OUT
VR
Fig.14
2-2. BA6920FP-Y (See Fig. 16)
High output voltage is expressed by the following equation:
VoutH (high output voltage) = Vref voltage + {VF (Q2) + VF( Q3)} - {VF(Q4) + VF (Q5)}
≒Vref
voltage +ΔVF
(VF is the base-emitter voltage in the forward direction)
Although
ΔVF
depends on the output current, Vo is almost VR.
The VOH is beyond control if the Vref value is higher than the above, and determined
by the voltage condition of VCC and VM.
For example, when Vref = VCC
≒VCC
- 1.7 V
Relation of VCC, VM, and VREF
VCC1, VCC2, and VR should be set as follows.
VREF < VM - Vsat (Q5) + VF (Q5) + VF (Q4) - {VF (Q2) + (Q3)}
≒
VM - 0.3 V
Operating conditions
pin
V
CC
VM
VREF
Voltage
6.5
½
34
6.5
½
34
Shown above
Unit
V
V
-
VREF
Fig.16
Q2
Q3
OUT
Q4
Q5
= VM,
Q1
VM
VOH≒VCC - Vsat (Q1) - VF (Q4) -VF (Q5)
VCC
Output Voltage Control Range
Fig.15
3 ) Selection of forward or reverse rotation
To change the rotation direction of the motor in operation, be sure to brake or open the motor current on time.
In the above case,
Braking: The braking time or over. The braking time is defined as the time of setting the output low level voltage to the GND
potential or below, when the brake operates.
Opening: A period of 1 ms or over is recommended.
5/8
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