Motor Drivers for Printers
System Driver
for Ink Jet Printers
BD64550EFV
No.10016EAT03
●Description
This is 1-chip system motor driver integrating 2-channel H-bridge driver, step-down switching regulator with built-in power
DMOS, series regulator and reset output.
●Features
1) Low-on resistance output H-bridge driver (2-channel)
2) Constant-current chopping drive H-bridge driver
3) Switching regulator with built-in P-channel power DMOS FET
4) Soft start function: 23.6 ms (Typ.)
5) Reset release timer: 80 ms (Typ.)
6) 16 bit serial interface
7) Logic input interface (serial/parallel changeable)
8) Ultra thin type high heat dissipation HTSSOP-B40 package
9) Overcurrent protection in H-bridge driver block
10) Input voltage low voltage protection in H-bridge driver block
11) Overcurrent protection in switching regulator block
12) Output overvoltage protection in switching regulator block
13) Output low voltage protection in switching regulator block
14) Thermal shutdown
●Applications
Inkjet printer, photo printer, etc.
●Absolute
Maximum Ratings (Ta=25℃)
Parameter
VM applied voltage
Logic input voltage
RIN applied voltage
RNF voltage
Power dissipation
Operating temperature range
Storage temperature range
Junction temperature
Motor driver output current (peak 500 ns)
Motor driver output current (DC)
Switching regulator output current (DC)
Series regulator output current (DC)
Symbol
V
M
V
L
V
RIN
V
RNF
Pd
T
OPR
T
STG
T
jmax
I
omax
(peak)
I
omax
(DC)
I
omax
I
omax
Ratings
40
-0.4 ~ 5.5
5.5
0.5
1600*
-25 ~ +85
-55 ~ +150
150
8.0
2.5**
0.5
0.25
Unit
V
V
V
V
mW
℃
℃
℃
A
A
A
A
* Reduced by 12.8 mW/℃ over 25
℃,
when mounted on a glass epoxy board (70 mm x 70 mm x 1.6 mm).
** Must not exceed Pd or ASO.
●Operating
Conditions
Parameter
VM operating power supply voltage range
SCLK max. operating frequency
Switching regulator output voltage range
Symbol
V
M
F
SCLK
V
swreg
Limit
7 ~ 36
20
3~5
Unit
V
MHz
V
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© 2010 ROHM Co., Ltd. All rights reserved.
1/16
2010.06 - Rev.A
BD64550EFV
●Electrical
Characteristics (Unless otherwise specified,Ta=25℃,V
M
=24V)
Parameter
Overall
VM current 1
VM current 2
H-bridge 1
Output on resistance (source side))
Output on resistance (sinking side)
Output leak current
Built-in diode forward direction voltage
(source side)
Built-in diode forward direction voltage
(sinking side)
H-bridge 2
Output on resistance (source side)
Output on resistance (sinking side)
Output leak current
Built-in diode forward direction voltage
(source side)
Built-in diode forward direction voltage
(sinking side)
Current control
VREF voltage range
VREF pin outflow current
RNF pin outflow current
RNFS pin outflow current
VREF-RNFS offset voltage
Control logic
High input voltage
Low input voltage
Input current
Switching power source
DSEN threshold voltage
Output on resistance
Leak current
DUTY_MAX value
Clock frequency
DSEN pin outflow current
Series power source
Output voltage
Leak current
RESET pin
Output voltage
Leak current
High VM threshold voltage
Low VM threshold voltage
High motor UVLO voltage
Low motor UVLO voltage
Reset delay time
V
RSTL
I
RSTLEAK
V
MPORH
V
MPORL
V
MMTH
V
MMTL
T
POR
0
0
6.3
5.9
13.5
12.5
50
-
-
6.5
6.1
15
14
80
0.2
10
6.7
6.3
16.5
15.5
110
V
µA
V
V
V
V
ms
V
SOUT
I
SLEAK
1.425
0
1.5
-
1.575
10
V
µA
V
SWBIAS
R
SWON
I
SWLEAK
D
MAX
F
SW
I
DSEN
0.873
-
0
-
130
-
0.9
0.8
-
92
200
0
0.927
1.04
10
-
270
1
V
Ω
µA
%
kHz
µA
V
INH
V
INL
I
IN
2.0
0
21
-
-
33
5.5
0.8
45
V
V
µA
V
REF
I
REF
I
RNF
I
RNFS
V
OFFSET
0.8
-
5
-
-15
-
0
15
0
0
3.5
1
30
1
15
V
µA
µA
µA
mV
R
ONH2
R
ONL2
I
LEAK2
V
FH2
V
FL2
-
-
0
0.6
0.6
0.7
0.5
-
0.9
0.9
0.91
0.65
10
1.2
1.2
Ω
Ω
µA
V
V
R
ONH1
R
ONL1
I
LEAK1
V
FH1
V
FL1
-
-
0
0.6
0.6
0.6
0.4
-
0.9
0.9
0.78
0.52
10
1.2
1.2
Ω
Ω
µA
V
V
I
VM1
I
VM2
-
-
-
-
8
12
mA
mA
Symbol
Limit
Min.
Typ.
Max.
Unit
Technical Note
Conditions
V
M
=7V
V
M
=24V
I
o
=1A
I
o
=1A
V
M
=36V
I
o
=1A
I
o
=1A
I
o
=1A
I
o
=1A
V
M
=36V
I
o
=1A
I
o
=1A
VREF=2V
Input voltage=3.3V
At I
o
=250mA
V
M
=36V
At I
o
=70mA
I
DRAIN
=1mA
V
M
at power on
V
M
at power off
Off motor only
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© 2010 ROHM Co., Ltd. All rights reserved.
2/16
2010.06 - Rev.A
BD64550EFV
●Reference
Data
6
25℃
Circuit current :Icc[mA]
85℃
8.00
Technical Note
1.2
CLK8M [MHz]
4
-25℃
6.00
0.8
Vref [V]
0.4
0.0
-25
0
25
50
75
4.00
2
2.00
0
0
8
16
24
32
Supply voltage :VM[V]
0.00
Temperature [℃]
-25
0
25
50
Temperature (
℃
)
75
Fig.1 VM Current
1.4
1.2
Output H voltage :VOH[V]
Fig.2 Internal Reference Clock
(VM=24V)
0.9
0.8
Output L voltage :VOL[V]
85
℃
Output H voltage :VOH[V]
Fig.3 Temperature dependence of
Internal Standard Voltage (VM=24V)
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-25
℃
25
℃
85
℃
1.0
0.8
0.6
25
℃
0.7
0.6
0.5
0.4
0.3
0.2
0.1
25
℃
85
℃
-25
℃
0.4
0.2
0.0
0
400
800
1200
1600
2000
Supply current :Io[mA]
-25
℃
0.0
0
400
800
1200
1600
Supply current :Io[mA]
2000
0
400
800
1200
1600
2000
Supply current :Io[mA]
Fig.4 OUT1 High Output Voltage
(source side)
1.4
1.2
Output L voltage :VOL[V]
1.0
0.8
0.6
0.4
0.2
0.0
0
400
800
1200
1600
2000
Supply current :Io[mA]
-25
℃
25
℃
Fig.5 OUT1 Low Output Voltage
(sinking side)
500
Fig.6 OUT2 High Output Voltage
(source side)
100
VM=7V
Swout voltage :Rsw[mV]
400
85
℃
300
25
℃
200
-25
℃
100
80
Output effect:[%]
VM=24V
85
℃
60
40
20
0
0
100
200
300
400
500
Supply current :Io[mA]
0
0
100
200
300
400
500
Output current :[mA]
Fig.7 OUT2 Low Output Voltage
(sinking side)
2.0
Fig.8 Switching Regulator High Output
Voltage
4
-25
℃
25
℃
85
℃
Fig.9 Switching Regulator Efficiency
(Ta=25℃)
1.8
Swout voltage :SV[mV]
3
Rout voltage:[V]
1.6
2
1.4
1.2
1
1.0
0
50
100
150
200
250
Supply current :[mA]
0
0
2
4
6
8
Supply v oltage :VM[V]
Fig.10 Series Regulator Load Regulation
(VM=24V, Ta=25℃)
Fig.11 Reset Output
(Pull up to switching regulator at 10kΩ)
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© 2010 ROHM Co., Ltd. All rights reserved.
3/16
2010.06 - Rev.A
BD64550EFV
●Block
Diagram, Application Circuit Diagram, and Pin Function
Technical Note
Be sure to use VM1,VM2.VM3 and VM4 by short-circuit.
VM2
32
33
8
9
VM1
VM1
OUT1P
VM2
OUT2P
39
34
7
2
Pre
driver
Pre
driver
OUT2M
RNF2
0.2Ω
(0.04~0.35Ω)
RNF2
37
38
36
OUT1M
CONTROL LOGIC
3
4
5
0.2Ω(0.04Ω~0.35Ω)
Io1=(VREF1/10)・(1/RNF1S)
See P.9.
RNF1
RNF1
RNF1S
VREF1
300µF
(220µF~470µF)
0.2Ω
(0.04Ω~0.35Ω)
N.C.
OUT1M
RNF1
RNF1
RNF1S
N.C.
OUT1P
VM1
VM1
VM4
N.C.
SWOUT
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
PGND
OUT2P
RNF2
RNF2
RNF2S
N.C.
OUT2M
VM2
VM2
VM3
N.C.
AGND
RESET
SCLK
SDATA
STROBE
DC2P
DC2E
SELECT
DGND
RNF2S
VREF2
19
Same as RNF1
SELECT
22
DC2P
24
1/10
1/10
20
31
28
VM3
RESET
SCLK(DC1P)
27
Selector
DC2E
STROBE(DC1E
)
23
25
Serial
Control
POWER
MONITOR
RESET
SDATA
26
AGND
29
16
40
21
PGND
DGND
VM4
N.C.
ROUT
N.C.
RIN
N.C.
DSEN
VREF2
VREF1
OSC
UVLO
TSD
BG
10
From
VDCDCOUT
RIN
ROUT
REG
14
BG BG
DRIVER
SWOUT
VDCDCOUT
220µH
2.7kΩ
12
1µF
(0.1µF~2.2µF)
18
4700pF
100µF
DSEN
1kΩ
The figure on the left-hand side shows
optimum recommended values.
See P.10 for setting.
Fig.12 Block Diagram and Application Circuit Diagram
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Pin
name
NC
RNF1
RNF1
RNF1S
NC
VM1
VM1
VM4
NC
NC
ROUT
NC
RIN
NC
DSEN
VREF2
VREF1
Function
Non Connection
Output current detection pin 1
Output current detection pin 1
Output current detection input pin
Non Connection
Motor power supply pin
Motor power supply pin
Switching regulator power supply pin
Non Connection
Non Connection
Series regulator output pin
Non Connection
Series regulator power supply pin
Non Connection
Switching regulator voltage sense pin
Reference voltage input pin
Reference voltage input pin
No.
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
*
Fig.13 Pin Assignment Diagram
Pin
name
DGND
DC2E
DC2P
STROBE
SDATA
SCLK
Function
Digital GND
H-bridge 2 side enable input pin
H-bridge 2 side phase pin
Serial port strobe input pin /
H-bridge 1 side enable pin
Serial port data input pin
Serial port clock input pin /
H-bridge 1 side phase input pin
ANALOG GND
Non Connection
Power supply pin
Motor power supply pin
Motor power supply pin
Non Connection
Output current detection input pin
Output current detection pin 2
Output current detection pin 2
POWER GND
OUT1M H-bridge output pin 1M
SELECT Input pin select pin
OUT1P H-bridge output pin 1P
RESET Reset signal output pin
AGND
NC
VM3
VM2
VM2
NC
RNF2S
RNF2
RNF2
PGND
SWOUT Switching regulator output pin
OUT2M H-bridge output pin 2M
OUT2P H-bridge output pin 2P
Precaution regarding VM pin
If you use VM1, VM2, VM3 and VM4 not by short-circuit, they may be destroyed. Be sure to use them by short-circuit.
And be sure to set up a bypass capacitor (220µF to 470µF) closer to VM3 pin as much as possible.
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4/16
2010.06 - Rev.A
BD64550EFV
Technical Note
●Pin
selection function
Either serial control or external PWM control can be selected for motor control type with SELECT pin (pin 22).
SELECT
Output state
L
H
Serial input mode
External PWM control mode
STROBE/DC1E(25pin)
ENA PHA
SEL
OUTPUT
SEL
Serial
Internal shift register
SDATA(26pin)
Control
Logic
SCLK/DC1P(27pin)
Serial
DC2P(24pin)
DC2E(23pin)
SELECT(22pin)
Serial
SEL
SEL
Fig.14 Serial Input Block Diagram
The input/output logic at SELECT = H is as follows.
DC1E/DC2E
L
H
DC1P/DC2P
L
H
OUTP
SINK
SOURCE
Output state
Open
ACTIVE
OUTM
SOURCE
SINK
○Procedure
of DC motor drive by external PWM control
1) Serial setting
Set the serial by SELECT pin = L. (WORD_S and WORD_D setting)
・WORD_S
(see P.7) is a drive parameter for setting OFF_TIME, BLANK TIME etc.
・WORD_D
(see P.7) is for drive setting to set drive mode of each H-bridge.
When setting WORD_D (see P.7), make sure that ENABLE signal (ENABLE_1½ENABLE_2) of serial bit is L.
If ENABLE signal is H, the motor may operate.
Input of DC2P pin can be either H or L.
2) External PWM drive mode switch
Set external PWM drive mode by SELECT pin = H.
Switch by DC1E (STROBE)/CD2E pin = L when switching SELECT pin.
3) Drive
PHASE, ENABLE pin input signal (DC1E/DC1P/DC2E/DC2P) drives in external PWM mode.
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5/16
2010.06 - Rev.A
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