BCDSEMI AM5901ALF44-E1

Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
General Description
Features
The AM5901A is a 4-channel motor driver with power
controller that includes the reset, battery charge and
reduced voltage detection circuits required for portable
CD/MP3/VCD players on a single chip.
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·
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·
·
·
·
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This kind of IC is provided with lower startup voltage
and power consumption than similar products, its
driver block power supply uses on-chip switching
regulator, making this component an ideal choice for
low-power sets. It is used in mini portable compact
disc players (CDP), portable mini disc players (MD),
disc-man or other portable compact disc media.
The AM5901A is available in PQFP-44 and LQFP-44
packages.
PQFP-44
AM5901A
4-channel H-bridge Driver
Built-in DC/DC Converter Control Circuit
Built-in Reset Circuit
Built-in Reduced Voltage Detection Circuit
Built-in Battery Charging Circuit
Built-in General-purpose Operational Amplifier
Built-in Thermal Shutdown Circuit
Low Power Consumption
Applications
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Portable Compact Disc Player (CDP)
Portable Mini Disc Player
Portable Disc-man
Portable CD/MP3/VCD
Other Portable Compact Disc Media
LQFP-44
Figure 1. Package Types of AM5901A
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
1
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Pin Configuration
F44 Package
(PQFP-44)
RCHG
OUT1R
OUT1F
OUT2R
33
32
31
30
OUT2F POWGND OUT3F
29
28
27
OUT3R
OUT4F
OUT4R
BRAKE1
26
25
24
23
AMUTE
34
22
IN1
EMP
35
21
MUTE2
HVCC
36
20
IN2
PSW
37
19
MUTE34
CLK
38
18
IN4
START
39
17
IN3
OFF
40
16
VREF
CHGVCC
41
15
SEL
42
14
OP+
PREGND
43
13
OPOUT
PWMFIL
44
12
VSYS1
1
2
3
4
5
6
7
8
BSEN
BATT
RESET
DEAD
SW
EO
EI
SPRT
9
CT
10
N.C.
VSYS2
11
OP-
Figure 2. Pin Configuration of AM5901A (Top View)
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
2
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Pin Configuration (Continued)
LF44 Packages
(LQFP-44)
RCHG
OUT1R
OUT1F
OUT2R
33
32
31
30
OUT2F POWGND OUT3F
29
28
27
OUT3R
OUT4F
OUT4R
BRAKE1
26
25
24
23
AMUTE
34
22
IN1
EMP
35
21
MUTE2
HVCC
36
20
IN2
PSW
37
19
MUTE34
CLK
38
18
IN4
START
39
17
IN3
OFF
40
16
VREF
CHGVCC
41
15
VSYS2
SEL
42
14
OP+
PREGND
43
13
OPOUT
PWMFIL
44
12
VSYS1
1
2
3
4
5
6
7
8
BSEN
BATT
RESET
DEAD
SW
EO
EI
SPRT
9
CT
10
N.C.
11
OP-
Figure 3. Pin Configuration of AM5901A (Top View)
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
3
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Pin Description
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
Pin Name
BSEN
BATT
RESET
DEAD
SW
EO
EI
SPRT
CT
N.C.
OPVSYS1
OPOUT
OP+
VSYS2
VREF
IN3
IN4
MUTE34
IN2
MUTE2
IN1
BRAKE1
OUT4R
OUT4F
OUT3R
OUT3F
POWGND
OUT2F
OUT2R
OUT1F
OUT1R
RCHG
AMUTE
EMP
HVCC
PSW
CLK
START
OFF
CHGVcc
SEL
PREGND
PWMFIL
Function
Battery voltage monitor
Battery power supply input
Reset detection output
Dead-time setting
Booster transistor drive
Error amplifier output
Error amplifier input
Short-circuit protection setting
Triangular wave output
Nothing connected
Operational amplifier negative input
Control circuit power supply input
Operational amplifier output
Operational amplifier positive input
Pre-driver power supply input
Reference power supply input
CH3 control signal input
CH4 control signal input
CH3/CH4 mute
CH2 control signal input
CH2 mute
CH1 control signal input
CH1 brake
CH4 negative output
CH4 positive output
CH3 negative output
CH3 positive output
Power unit power ground
CH2 positive output
CH2 negative output
CH1 positive output
CH1 negative output
Charging current setting
Reset inversion output
"Empty" detection output
H-bridge power supply input
PWM transistor drive
External clock synchronization input
Boost DC/DC converter starting
Boost DC/DC converter OFF
Charging circuit power supply input
"Empty" detection level switching
Pre-unit power supply ground
PWM phase compensation
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
4
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Functional Block Diagram
RCHG
OUT1R
OUT1F
OUT2R
OUT2F
POWGND
OUT3F
OUT3R
OUT4F
OUT4R
BRAKE1
33
32
31
30
29
28
27
26
25
24
23
BRAKE
EMP
35
HVcc
36
PSW
37
22
+
+
MUTE2
34
+
19
MUTE34
+
18
IN4
+
17
IN3
+
16
VREF
15
VSYS2
14
OP+
13
OPOUT
12
VSYS1
+
38
39
OFF
40
+
START
POWER
OFF
STARTER
MUTE2
IN2
MAXIMUM
DETECTION
CLK
21
IN1
20
MUTE1
AMUTE
TRIANGLE WAVE
CHGVcc
41
SEL
42
PREGND
43
PWMFIL
44
OVER VOLTAGE
+
+
+
+
++
+
1
2
3
4
5
6
7
BSEN
BATT
RESET
DEAD
SW
EO
EI
8
SPRT
9
10
CT
N.C.
11
OP-
Figure 4. Functional Block Diagram of AM5901A
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
5
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Ordering Information
-
AM5901A
E1: Lead Free
Blank: Tin Lead
Circuit Type
Package
F44: PQFP-44
LF44: LQFP-44
Part Number
Marking ID
Package
Temperature
Range
Tin Lead
Lead Free
Tin Lead
Lead Free
PQFP-44
0 to 70oC
AM5901AF44
AM5901AF44-E1
AM5901AF44
AM5901AF44-E1
LQFP-44
oC
0 to 70
AM5901ALF44
Packing Type
AM5901ALF44-E1 AM5901ALF44 AM5901ALF44-E1
Tray
Tray
BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant.
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
6
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
VCC
13.5
V
Driver Output Current
IO
500
mA
Power Dissipation
PD
625 (Note 2)
mW
Operating Junction Temperature
TJ
150
o
TSTG
-55 to 150
o
Supply Voltage
Storage Temperature
C
C
Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions
beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute
Maximum Ratings" for extended periods may affect device reliability.
Note 2: Power dissipation is reduced by 5mW for each increase in TA of 1oC over 25oC.
Recommended Operating Conditions
Parameter
Symbol
Min
Typ
Max
Unit
Control Circuit Power Supply Voltage
VSYS1
2.7
3.2
5.5
V
Pre-driver Power Supply Voltage
VSYS2
2.7
3.2
5.5
V
H-bridge Power Supply Voltage
HVCC
PWM
BATT
V
Power Unit Power Supply Voltage
BATT
(VCC)
1.6
2.4
8
V
CHGVCC
3.0
4.5
8
V
TA
0
25
70
oC
Charging Circuit Power Supply Voltage
Operating Temperature
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
7
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Electrical Characteristics
(Typicals and limits apply for TA=25oC, BATT=2.4V, VSYS1=VSYS2=3.2V, VREF=1.6V, CHGVCC=0, CLK=88.2kHz,
unless otherwise specified.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Common Section
BATT Standby Current
IST
BATT=9V, VSYS1=VSYS2
=VREF=0V
BATT Supply Current at No Load
IBAT
VSYS1 Supply Current at No Load
0
5
µA
HVCC=0.45V, MUTE34=3.2V
2.5
4
mA
ISYS1
HVCC=0.45V, MUTE34=3.2V,
EI=0V
4.7
6.4
mA
VSYS2 Supply Current at No Load
ISYS2
HVCC=0.45V, MUTE34=3.2V
4.1
5.5
mA
CHGVCC Supply Current at No
Load
ICHGVCC
CHGVCC=4.5V, ROUT=OPEN
0.65
2
mA
H-bridge Driver Section
Voltage Gain (CH1,3,4)
GVC134
12
14
16
dB
Voltage Gain (CH2)
GVC2
21.5
23.5
25.5
dB
Gain Error by Polarity
∆GVC
-2
0
2
dB
IN Pin Input Resistance (CH1,3,4)
RIN134
IN=1.7 and 1.8V
9.6
11
14.4
kΩ
IN Pin Input Resistance (CH2)
RIN2
IN=1.7 and 1.8V
6.6
7.5
9.9
kΩ
Maximum Output Voltage
VOUT
RL=8Ω, HVCC=BATT=4V, IN=0 to
3.2V
1.9
2.1
Lower Transistor Saturated
Voltage
VSATL
IO=-300mA, IN=0 and 3.2V
240
400
mV
Upper Transistor Saturated Voltage
VSATU
IO=300mA, IN=0 and 3.2V
240
400
mV
8
mV
Input Offset Voltage
Output Offset Voltage (CH1,3,4)
-8
VIO
V
VOO134
VREF=IN=1.6V
-54
0
54
mV
Output Offset Voltage (CH2)
VOO2
VREF=IN=1.6V
-134
0
134
mV
Dead Zone
VDB
-15
0
15
mV
BRAKE1 ON Threshold Voltage
VBRON
IN1=1.8V
BRAKE1 OFF Threshold Voltage
VBROFF
IN1=1.8V
MUTE2 ON Threshold Voltage
VM2ON
IN2=1.8V
MUTE2 OFF Threshold Voltage
VM2OFF
IN2=1.8V
Mar. 2007 Rev. 1. 3
2
V
0.8
2
V
V
0.8
V
BCD Semiconductor Manufacturing Limited
8
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
Typ
MUTE34 ON Threshold Voltage
VM34ON
MUTE34 OFF Threshold Voltage
VM34OFF IN3=IN4=1.8V
2.0
V
VREF ON Threshold Voltage
VREFON
IN1=IN2=IN3=IN4=1.8V
1.2
V
VREF OFF Threshold Voltage
VREFOFF
IN1=IN2=IN3=IN4=1.8V
BRAKE 1 Brake Current
IBRAKE1
Current difference between BRAKE1
pin "H" and "L"
IN3=IN4=1.8V
Max
Unit
0.8
V
0.8
V
4
7
10
mA
PWM Power Supply Driving Section
PWM Sink Current
IPSW
IN1=2.1V
7.9
13
17.5
mA
HVCC Level Shift Voltage
VSHIF
IN1=1.8V, HVCC-OUT1F
0.25
0.45
0.55
V
HVCC Leak Current
IHLK
HVCC=9V,
VSYS1=VSYS2=BATT=0V
0
11
µA
GPWM
IN1=1.8V, HVcc=1.2 to 1.4V
1/60
1/50
1/40
1/kΩ
3.05
3.2
3.35
V
1.4
1.6
PWM Amplifier Transfer Gain
DC/DC Converter Section
(Error Amplifier Section)
VSYS1 Pin Threshold Voltage
VSITH
EO Pin Output Voltage H
VEOH
EI=0.7V, IO=-80µA
EO Pin Output Voltage L
VEOL
EI=1.3V, IO=80µA
SPRT Pin Voltage (Normal)
VSPR
EI=1.3V
SPRT Pin Current 1 EO=H
ISPR1
EI=0.7V
SPRT Pin Current 2 EO=L
ISPR2
SPRT Pin Current 3
(Over-voltage)
ISPR3
SPRT Pin Impedance
RSPR
SPRT Pin Threshold Voltage
VSPTH
EI=0.7, CT=0V
Over-voltage Protection Detect
VHVPR
BSEN Pin Voltage,
pin 7=1.3V, pin 12=3.2V
V
0.3
V
0
0.1
V
6
10
16
µA
EI=1.3V, OFF=0V
12
20
32
µA
EI=1.3V, BATT=9.5V
12
20
32
µA
175
220
265
kΩ
1.1
1.2
1.3
V
8
8.6
9
V
1.13
V
(Short-circuit Protection)
(Transistor Driving Section)
SW Pin Output Voltage 1 H
VSW1H
BATT=CT=1.5V, IO=-2mA,
VSYS1=VSYS2=0V, at start
0.78
0.98
SW Pin Output Voltage 2 H
VSW2H
CT=0V, IO=-10mA, EI=0.7V,
SPRT=0V
1
1.5
SW Pin Output Voltage 2 L
VSW2L
CT=2V, IO=10mA
V
0.3
0.45
V
SW Pin Oscillating Frequency 1
fSW1
CT=470pF, VSYS1=VSYS2=0, at start
65
80
95
kHz
SW Pin Oscillating Frequency 2
fSW2
CT=470pF, CLK=0V
60
70
82
kHz
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
9
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Electrical Characteristics (Continued)
Parameter
Symbol
Conditions
Min
SW Pin Oscillating Frequency 3
fSW3
CT=470pF
SW Pin Minimum Pulse Width
TSWMIN
CT=470pF, EO=0.5~0.7V Sweep
0.01
Pulse Duty at Start
DSW1
CT=470pF, VSYS1=VSYS2=0V
40
Max Pulse Duty at Self-Running
DSW2
EI=0.7V, CT=470pF, CLK=0V,
SPRT=1.1V, START not connected
Max Pulse Duty at CLK Synchronization
DSW3
EI=0.7V, CT=470pF, SPRT=1.1V,
START not connected
Typ
Max
88.2
Unit
kHz
0.6
µs
50
60
%
70
80
90
%
65
75
85
%
(Dead Time Section)
DEAD Pin Impedance
RDEAD
20
25
30
kΩ
DEAD Pin Output Voltage
VDEAD
0.78
0.88
0.98
V
VSYS1
-2
V
115
µA
BATT
-1
V
(Interface Section)
OFF Pin Threshold Voltage
OFF Pin Bias Current
VOFTH
EI=1.3V
IOFF
OFF=0V
75
START Pin ON Threshold
Voltage
VSTATH1
VSYS1=VSYS2=0V, CT=2V
START Pin OFF Threshold Voltage
VSTATH2
VSYS1=VSYS2=0V, CT=2V
START Pin Bias Current
ISTART
CLK Pin Threshold Voltage H
VCLKTHH
CLK Pin Threshold Voltage L
VCLKTHL
CLK Pin Bias Current
ICLK
START=0V
95
BATT
-0.3
10
V
16
19
2
µA
V
CLK=3.2V
0.8
V
10
µA
(Started Circuit Section)
Starter Switching Voltage
VSTMM
VSYS1=VSYS2=0V to 3.2V
START=0V
2.3
2.5
2.7
V
Starter Switching Hysteresis Width
VSNHS
START=0V
18
200
300
mV
1.63
1.83
2.03
V
Discharge Release Voltage
VDIS
(Empty Detection Section)
Empty Detection Voltage 1
VEMPT1
VSEL=0V
2.1
2.2
2.35
V
Empty Detection Voltage 2
VEMPT2
ISEL=-2µΑ
1.7
1.8
1.945
V
Empty Detection Hysteresis Width1
VEMHS1
VSEL=0V
8
50
100
mV
Empty Detection Hysteresis Width2
VEMHS2
ISEL=-2µΑ
8
50
100
mV
0.5
V
1
µA
27
kΩ
EMP Pin Output Voltage
VEMP
IO=1mA, BSEN=1V
EMP Pin Output Leak Current
IEMPL
BSEN=2.4V
BSEN Pin Input Resistance
RBSEN
VSEL=0V
Mar. 2007 Rev. 1. 3
17
23
BCD Semiconductor Manufacturing Limited
10
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Electrical Characteristics (Continued)
Parameter
Symbol
BSEN Pin Leak Current
IBSNL
SEL Pin Detection Voltage
VSELTH
SEL Pin Detection Current
ISELT
Conditions
Min
Typ
VSYS1=VSYS2=0V, BSEN=4.5V
VSELTH=BATT-SEL, BSEN=2V
Max
Unit
1
µA
1.35
V
-15
µA
(Reset Section)
VSYS1 Reset Threshold Voltage
Ratio
RESET Detection Hysteresis
Width
HSRT
Ratio of VSYS1 voltage and erroramp threshold voltage
VRSTHS
82.98
90
97.2
%
10
50
100
mV
0.5
V
108
kΩ
IO=1mA, VSYS1=VSYS2=2.8V
RESET Pin Output Voltage
VRST
RESET Pin Pull-up Resistance
RRST
AMUTE Pin Output Voltage 1
VAMTI
IO=-1mA, VSYS1=VSYS2=2.8V
BATT
-0.4
BATT
V
AMUTE Pin Output Voltage 2
VAMT2
ΙO=−1mA, START=0V,
VSYS1=VSYS2=0V
BATT
-0.4
BATT
V
AMUTE Pin Pull Down Resistance
RAMT
113
kΩ
300
nA
5.5
mV
72
77
90
95
(Operational Amplifier Section)
Input Bias Current
IBIAS
Input Offset Voltage
VIOOP
High Level Output Voltage
VOHOP
RL=OPEN
Low Level Output Voltage
VOLOP
RL=OPEN
OP+=1.6V
-5.5
2.8
Output Driver Current (Source)
ISOU
Output shorted to GND By 50Ω
Output Driver Current (Sink)
ISIN
Output shorted to VSYS By 50 Ω
Open Loop Voltage GAIN
GVO
VIN=-75dBV, f=1kHz
Slew Rate
0
0.3
SR
V
0.2
V
-6.5
-3
mA
0.7
2.2
mA
70
dB
0.5
V/µs
(Charging Circuit Section)
ISEL
CHGVCC=4.5V, RCHG=1.8kΩ,
VSEL=4.5V
80
150
250
mA
RCHG Pin Bias Voltage
VRCHG
CHGVCC=4.5V, RCHG=1.8kΩ
0.745
0.81
0.960
V
RCHG Pin Output Resistance
RRCHG
CHGVCC=4.5V, RCHG=0.5 and 0.6V
0.75
0.95
1.2
kΩ
SEL Pin Leak Current 1
ISELLK1
CHGVCC=4.5V, RCHG=OPEN
BATT=4.5V
1.2
µA
SEL Pin Leak Current 2
ISELLK2
CHGVCC=0.6V, RCHG=1.8kΩ
BATT=4.5V
1.2
µA
SEL Pin Saturation Voltage
VSELCG
CHGVCC=4.5V, IO=300mA,
RCHG=0Ω
1
V
SEL Pin Charging Current
Mar. 2007 Rev. 1. 3
0.45
BCD Semiconductor Manufacturing Limited
11
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
3
3
2
2
Output Voltage (CH2): VO (V)
Output Voltage (CH1,3,4): VO (V)
Typical Performance Characteristics
1
0
RL=Infinite
RL=20Ω
RL=8Ω
RL=4Ω
-1
-2
1
RL=Infinite
RL=20Ω
RL=8Ω
RL=4Ω
0
-1
-2
-3
-0.6
-0.4
-0.2
0.0
0.2
0.4
-3
-0.3
0.6
-0.2
-0.1
Input Voltage: VIN (V)
0.0
0.1
0.2
0.3
Input Voltage: VIN (V)
Figure 6. Input Load Fluctuation (CH2, Note 3))
Figure 5. Input Load Fluctuation (CH1, 3, 4, Note 3)
1.8
3.5
RESET Output Voltage (V)
EO, DEAD Output Voltage (V)
1.6
1.4
1.2
1.0
0.8
0.6
EO Pin
DEAD Pin
0.4
2.5
2.0
1.5
1.0
0.5
0.2
0.0
0.0
3.0
0.5
1.0
1.5
2.0
2.5
3.0
0.0
0.0
3.5
0.5
1.0
1.5
2.0
2.5
3.0
3.5
VSYS1 (V)
VSYS1 (V)
Figure 8. RESET Pin Voltage
Figure 7. Error Amplifier Output Voltage
Note 3: Input voltage herein is referenced to Bias pin voltage.
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
12
4.0
OFF
1N5817
CLK
2SA1585
EMP
To System Micro Controller
BU34381 (or BU34581)
W1 (Pin 44)
PLAY
33µH
Play
47µ /
6V
0.1µ
10P
47
Mar. 2007 Rev. 1. 3
13
44
43
42
41
0.1µ
100k
220µ/
10V
1
2
0.1µ
29
28
27
26
25
4
5
3.3n
7
22k
2SC4115
or
2SD2150
2SC4115
or
2SD2150
6
47p
1µ
8
100
1mH
1k
9
AM5901A
30
10
10
24
470p
0.1µ
TRACKING
680k/
NC
1000p
RESET
3
31
FOCUS
0.1µ
11
23
0.1µ
12
13
14
15
16
17
18
19
20
21
22
220µ/10V
VOUT
MUTE 2
VREF
MUTE 34
To System Micro Controller
BRAKE 1
IN4
40
32
M
SPINDLER
IN2
39
38
37
36
35
34
33
M
TRAVERSE
IN1
2200p
AMUTE
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Typical Application
Servo Processor
IN3
0.1µ
1.8k
Figure 9. Typical Application 1 of AM5901A in Portable CD/VCD Player
BCD Semiconductor Manufacturing Limited
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Application Information
H-Bridge Driver
DC/DC Converter Control Circuit
1. Mute Function
Brake function is assigned to CH1, mute function
is assigned to other 3 channels.
(1) CH1 is in normal operation when the BRAKE
pin is low (high when CH1 mute on), and enters a
brake mode.
(2) CH2 is in normal operation when the MUTE2
pin is low (high when CH2 mute on).
(3) CH3,4 are in normal operation when the
MUTE34 pin is high (low when CH3,4 mute on).
1. Output Voltage
Booster circuit of voltage (VSYS1) can be
configured with external component. The voltage
is defined as follows.
VSYS1
12
R1
R2
R1*R3
R2*R4
+
(R2+R4)
(R1+R3)
VSYS1 = 1.245 *
GV=20 log | 110k/(R+7.5k)|
(V)
R2*R4
(R2+R4)
R1 = External Resistance
R2 = External Resistance
R3 = 35kΩ
R4 = 21kΩ
4. Driver Gain
Driver input resistance is 11kΩ (CH1, CH3,
CH4) and 7.5kΩ (CH2). Driver gain can be calculated by the expression.
CH2
R4
1.245V
3. Thermal Shutdown
If the chip temperature rises above 140 oC, then
the thermal shutdown (TSD) circuit is activated
and the output current is cut. When the chip
temperature has dropped to 100oC, then output
current begins to flow.
GV=20 log |55k/(R+11k)|
R3
7
2. VREF Drop Mute
When the voltage impressed to VREF terminal is
1.0V (Typ.) or less, impedance of driver output
becomes "high".
CH1,3,4
EI
2. Short-Circuit Protection Function
When the output of error amplifier is "H", if the
voltage of SPRT terminal has reached 1.245V
(Typ.) upon charging the terminal, switching of
SW terminal is disabled. Time to disable
switching depends on the capacitor of SPRT
terminal and it can be calculated by the
expression:
R is an external resistance
The power supply of driver output stage is HVCC
terminal and that of pre-driver circuit is VSYS2
terminal. Attach a by-pass capacitor (approximately 0.1µF) between the power supplies as
near as possible to this chip.
t=CSPRT * VTH/ISPRT (sec)
(VTH=1.245V, ISPRT=10µA)
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
14
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Application Information (Continued)
3. Soft-Start Function
The soft-start is functioned by putting a capacitor
between DEAD terminal and GND, the
maximum duty can be changed by attaching a
resistance to pin 4.
0.1 µ F
HVcc
36
+
47 µ F
t = CDEAD * R (sec)
(R=65kΩ)
33 µ H
4. Power-Off Operation
SPRT terminal is charged by setting OFF
terminal to "L". Then, switching of SW terminal
is terminated when the voltage of the SPRT
terminal has reached 1.245V (Typ.). Time to
disable switching depends on a capacitor of the
SPRT terminal and it can be calculated by the
expression:
SBD
PSW
PWMFIL
37
47 Ω
44
100k
t = CSPRT * VTH/IOFF (sec)
(VTH = 1.245V, IHV = 20µA)
10pF
2200pF
5. Over-Voltage Protection Operation
When the voltage applied to BSEN terminal has
been 8.4V (Typ.), SPRT terminal is charged.
Then, switching of SW terminal is terminated
when the voltage of the SPRT terminal has
reached 1.245V (Typ.). Time to disable
switching depends on a capacitor of SPRT
terminal and it can be calculated by the
expression:
"Empty" Detector Unit
When the voltage applied to BSEN terminal has
reached the detecting voltage or less. EMP
terminal varies from "H" to "L" (open collector
output). Hysteresis of 50mV (Typ.) is set to the
detecting voltage to prevent the output
chattering. The detecting voltage varies
depending on SEL terminal as follows:
t = CSPRT * VTH/IHV (sec)
(VTH = 1.245V, IHV = 20µA)
Detecting
Voltage
Return
Voltage
L
2.2V (Typ.)
2.25V (Typ.)
High-Z
1.8V (Typ.)
1.85V (Typ.)
SEL Pin
PWM Power Supply Driver Circuit
This circuit detects a maximum output level of
drivers of four channels and performs the PWM
supply of load drive power supply. This circuit
uses PNP transistor, Schottky Diode and
capacitor as external component.
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
15
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Application Information (Continued)
Reset Circuit
Upon 90% of DC/DC converter output voltage,
RESET terminal varies from "L" to "H" and
AMUTE terminal changes from "H" to "L".
Hysteresis of 50mV (Typ.) is set to the reset
voltage to prevent the output chattering.
other circuits. Charging current is set by the
resistance between RCHG terminal and GND.
The charging current takes constant current
through SEL terminal.
This circuit has a private thermal shutdown
circuit. When the chip temperature has risen to
140oC, the charging current is cut off. When the
chip temperature has dropped to 100oC, the
charging current begins to flow.
Charging Circuit
The power supply of the charging unit is from
CHGVCC terminal and it is independent of any
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
16
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Mechanical Dimensions
LQFP-44
Unit: mm(inch)
11.800(0.465)
12.200(0.480)
9.900(0.390)
10.100(0.398)
11.800(0.465)
12.200(0.480)
9.900(0.390)
10.100(0.398)
0.050 (0.002)
0.150 (0.006)
0°
7°
1.600 (0.063)
MAX
0.300(0.012)
0.450(0.018)
0.800(0.031)
TYP
0.450(0.018)
0.750(0.030)
0.125 (0.005)
TYP
1.350(0.053)
1.450(0.057)
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
17
Data Sheet
4-CHANNEL MOTOR DRIVER WITH POWER CONTROLLER
AM5901A
Mechanical Dimensions (Continued)
PQFP-44
Unit: mm(inch)
12.950(0.510)
13.800 (0.543)
9.900(0.390)
10.100(0.398)
12.950(0.510)
13.800 (0.543)
9.900(0.390)
10.100(0.398)
0.250(0.010)
MIN
0°
7°
2.450(0.096)
MAX
0.300(0.012)
0.450(0.018)
0.800(0.031)
TYP
0.730(0.029)
1.030(0.041)
0.130(0.005)
0.230(0.009)
1.950(0.077)
2.100(0.083)
Mar. 2007 Rev. 1. 3
BCD Semiconductor Manufacturing Limited
18
http://www.bcdsemi.com
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particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use
of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or
other rights nor the rights of others.
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