1/5
Structure
Product Name
:
:
Silicon Monolithic Integrated Circuit
Power Driver For Compact Disc Players
Device Name
:
BA5826FP
Features
:
•
•
•
•
•
•
•
•
4-ch BTL driver
Use of an HSOP28 power package can achieve downsizing of the set.
Gain can be controlled by attaching an external resistance.
A built-in thermal shutdown circuit installed.
A built-in 3.3V regulator installed. (External PNP Tr must be installed.)
A built-in general operational amplifier installed.
A built-in 2.7V reset circuit installed.
Using an external capacitor, the reset delay time can be changed.
{ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)]
Parameter
Power Supply Voltage
Power Dissipation
Operating
Temperature Range
Storage Temperature
Range
Symbol
VCC
Pd
Limits
13.5
1.7 *1
Unit
V
W
Topr
-35 to 85
°C
Tstg
-55 to 150
°C
*1 When mounted on the glass/epoxy board with the size: 70 mm×70 mm, the thickness: 1.6 mm, and
the rate of copper foil occupancy area: 3% or less.
Over Ta=25°C, derating at the rate of 13.6mW/°C.
{ OPERATING CONDITIONS
Parameter
Power Supply Voltage
Symbol
VCC
Limits
4.5 to 9
Unit
V
This product has not been checked for the strategic materials (or service) defined in the Foreign
Exchange and Foreign Trade Control Low of Japan so that a verification work is required before
exporting it.
Not designed for radiation resistance.
REV. A
2/5
{ ELECTRIC CHARACTERISTICS (Ta=25°C, Vcc=8V, VBIAS=1.65V, RL=8Ω, unless otherwise noted.)
Parameter
Circuit Current at no signal
<CH1>
Output Offset Voltage
Maximum Output Amplitude
Closed Circuit Voltage Gain
<CH2, 3, 4>
Output Offset Voltage
Maximum Output Amplitude
Closed Circuit Voltage Gain
<Mute>
Mute OFF Voltage
Mute ON Voltage
Bias Drop Mute Threshold
Voltage
<3.3V Regulator >
Output Voltage
Output Load Regulation
Power Supply Voltage
Regulation
<Operational Amplifier>
Offset Voltage
Input Bias Current
High-level Output Voltage
Low-level Output Voltage
Output Driving Current
Source
Output Driving Current Sink
<Reset Output>
Reset ON Threshold Voltage
Reset ON Output Voltage
<Reset τ Output>
<Reset τ Current>
Reset τ Threshold Voltage H
Reset τ Threshold Voltage L
Symbol
ICC
MIN.
6.0
TYP.
10.0
MAX
14.0
Unit
MA
Condition
No load applied
VOO1
VOM1
GVC1
-50
4.35
6.0
5.0
8.0
50
10.0
MV
V
DB
VBIAS=4V
VOO2
VOM2
GVC2
-50
4.3
7.0
4.9
8.0
50
9.0
mV
V
dB
VBIAS=4V
VMTOFF
VMTON
2.0
-
-
0.5
V
V
VBTHR
-
0.7
1.2
V
Vreg
∆VRL
3.13
-20
3.3
0
3.47
10
V
mV
IL=100mA
IL=100 to 200mA
∆VVCC
-10
0
35
mV
(Vcc=6 to 9V) IL=100mA
VOFOP
IBIAS
VOHOP
VOLOP
-6
7.5
-
-
6
300
0.3
mV
nA
V
V
VBIAS=4V
VBIAS=4V
ISOU
300
500
-
µA
VBIAS=4V
ISIN
1
-
-
mA
VBIAS=4V
VTHR
2.56
2.7
2.84
V
VRON
-
-
0.5
V
IREST
VRESTH
VRESTL
16.6
7.7
-
23.7
-
30.8
0.4
µA
V
V
When Vreg drops
Connected to 3.3V with the
resistance of 10kΩ applied.
VREST=1.5V
VREST=1V
{ OUTLINE DIMENSIONS, SYMBOLS
(MAX 18.85 include BURR)
Product
Number
(UNIT:mm)
REV. A
3/5
13
12
SLED
MOTOR
10k
13.3k
10
11
M
CH2
LEVEL
SHIFT
8
7
3.3V
100
CH1: SPINDLE
CH2: SLED
CH3: TRACKING
CH4: FOCUS
T. S. D.: Thermal shutdown
Resistance unit: [Ω]
4
25
10k
13.3k
5
24
6
23
MUTE
VCC=8V
GND
VCC
VCC
T.S.D.
REGULATOR,BIAS
drop
21
22
9
20
10k
13.3k
19
18
CH3
TRACKING
COIL
LEVEL
SHIFT
17
16
GND
14
15
{ APPLICATION CIRCUIT DIAGRAM
2
SPINDLE
MOTOR
SPINDLE
SLED
1
M
CH1
13.3k
LEVEL
SHIFT
LEVEL
SHIFT
GND
BIAS
TRACKING
FOCUS
28
27
CH4
FOCUS
COIL
3
26
RESET
SERVO PRE AMP
{ PIN NUMBERS, PIN NAMES
No.
Pin Name
1
VO1(-)
2
3
4
VO1(+)
IN1
RESET
5
REGB
6
REGOUT
7
8
9
MUTE
GND
IN2’
10
IN2
11
12
13
14
VO2(+)
VO2(-)
GND
OPOUT
Note:
Description
No.
Pin Name
Driver CH1 negative output
15
OPIN
Driver CH1 positive output
CH1 input terminal
Reset output
Regulator external Tr base connection
terminal
16
17
18
RESETτ
VO3(-)
VO3(+)
19
IN3
Regulator output
20
IN3’
Driver mute control terminal
PREGND, REGGND
CH2 input terminal for gain control
21
22
23
VCC
VCC
BIAS
CH2 input terminal
24
IN4’
Driver CH2 positive output
Driver CH2 negative output
CH2,3 POWGND
Operational amplifier output
25
26
27
28
IN4
VO4(+)
VO4(-)
GND
Description
Operational amplifier inverted
input
Reset τ terminal
Driver CH3 negative output
Driver CH3 positive output
CH3 input terminal
CH3 input terminal for gain
control
Power supply input
Power supply input
Bias input
CH4 input terminal for gain
control
CH4 input terminal
Driver CH4 positive output
Driver CH4 negative output
CH1,4 POWGND
The positive or negative polarity of driver outputs is determined by the input polarity.
When the signal H is applied to the input pin, the negative output pin outputs L and the positive
output pin outputs H.
REV. A
4/5
CAUTIONS ON USE
(1) Relationship between the mute function and the reset output
Driver Mute
Function
Reset output
Operation
Regulator voltage
‘H’→‘L'
drop
ON in all cases
Bias voltage drop
‘H’→‘L’
Thermal shutdown
‘H’→‘L’
Mute (pin 7)
Constant
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
[Regulator Voltage Drop]
When the regulator voltage drops to 2.7V (typ.) or less, the reset output will become ‘L’ while the mute
function will turn ON and, when the voltage recovers to 2.9V (typ.) or above, the reset output will
become ‘H’ while the mute function will turn OFF.
[Bias Drop]
When the bias terminal (pin 23) voltage has dropped to 0.7V (typ.) or less, the mute function will turn
ON while the reset output will become ‘L’. Under conditions of normal use, it should be set to 1.2V or
above.
[Thermal Shutdown]
When the chip temperature has reached to 175°C (typ.) or above, the mute function will turn ON while
the reset output will become ‘L’. Ten the chip temperature has dropped to 150°C (typ.) or less, the
mute function will turn OFF while the reset output will become ‘H’.
[Mute]
When the mute terminal (pin 7) voltage has set to open or dropped to 0.5V (typ.) or less, the mute
function will turn ON while the reset output will not change.
About reset τ terminal
Inserting a capacitor between the reset τ terminal (pin 16) and GND can set the delay time for the
reset output.
The delay time t [sec] can be expressed by the following equation, where C[F] is a capacitance of
the capacitor to be connected;
t=CV/I
When V=1.14[V], I=23.7[µA ] (typ.) and the capacitor with the capacitance of 4.7 µF is connected,
the delay time will become approximately 220msec.
Thermal shutdown (TSD), mute ON, bias terminal voltage drop, or regulator voltage drop will activate
the mute function, where only the driver part can be muted. While muting, the voltage at the output
terminal will equal to the internal bias voltage (approximately (VCC-VF) / 2).
The capacitor installed between the regulator output (pin 6) and GND also serves as an anti-oscillation
capacitor and therefore, it is required to have high performance in the temperature characteristics.
While the regulator is not in use, the regulator output terminal (pin 6) must be shorted to VCC and the
regulator external Tr base connection terminal (pin 5) must be open.
The radiating FIN must be connected to the external GND.
Short-circuits between output pin-VCC, output pin-GND, or output terminals (load short) must be
avoided. Make sure that the ICs are installed on the board in proper directions.
Mounting the ICs in improper directions may damage them or produce smoke.
About absolute maximum ratings
Exceeding the absolute maximum ratings, such as the applied voltage or the operating temperature
range, may cause permanent device damage. As these cases cannot be limited to the broken short
mode or the open mode, if a special mode where the absolute maximum ratings may be exceeded is
assumed, it is recommended to take mechanical safety measures such as attaching fuses.
About power supply lines
As a measure against the back current regenerated by a counter electromotive force of the motor, a
capacitor to be used as a regenerated-current path can be installed between the power supply and
GND and its capacitance value should be determined after careful check that any problems, for
example, a leak capacitance of the electrolytic capacitor at low temperature, are not found in various
characteristics.
About GND potential
The electric potential of the GND terminal must be kept lowest in the circuitry at any operation states.
About thermal design
With consideration of the power dissipation (Pd) under conditions of actual use, a thermal design
REV. A
5/5
provided with an enough margin should be done.
(12) About operations in a strong electric field
When used in a strong electric field, note that a malfunction may occur.
(13) ASO
When using this IC, the output Tr. must be set not to exceed the values specified in the absolute
maximum ratings and ASO.
(14) Thermal shutdown circuit
This IC incorporates a thermal shutdown circuit (TSD circuit). When the chip temperature reaches the
value shown below, the coil output to the motor will be set to open.
The thermal shutdown circuit is designed only to shut off the IC from a thermal runaway and not
intended to protect or guarantee the entire IC functions.
Therefore, users cannot assume that the TSD circuit once activated can be used continuously in the
subsequent operations.
TSD ON Temperature
[°C] (typ.)
175
Hysteresis Temperature
[°C] (typ.)
25
(15) About earth wiring patterns
When a small signal GND and a large current GND are provided, it is recommended that the large
current GND pattern and the small signal GND pattern should be separated and grounded at a single
point of the reference point of the set in order to prevent the voltage of the small signal GND from being
affected by a voltage change caused by the resistance of the pattern wiring and the large current.
Make sure that the GND wiring patterns of the external components will not change, too.
(16) This IC is a monolithic IC which has a P+ isolations and P substrate to isolate elements each other.
This P layer and an N layer in each element form a PN junction to construct various parasitic elements.
Due to the IC structure, the parasitic elements are inevitably created by the potential relationship.
Activation of the parasitic elements can cause interference between circuits and may result in a
malfunction or, consequently, a fatal damage. Therefore, make sure that the IC must not be used
under conditions that may activate the parasitic elements, for example, applying the lower voltage than
the ground level (GND, P substrate) to the input terminals.
Note that, while not applying the power supply voltage to the IC, any voltage must not be applied to the
input terminals. In addition, do not applying the voltage to input terminals without applying the power
supply voltage to the IC. Also while applying the power supply voltage, each input terminal must be
the power supply voltage or less; or within the guaranteed values in the electric characteristics.
REV. A
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
ROHM Customer Support System
www.rohm.com
Copyright © 2007 ROHM CO.,LTD.
THE AMERICAS / EUPOPE / ASIA / JAPAN
Contact us : webmaster@ rohm.co. jp
21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan
TEL : +81-75-311-2121
FAX : +81-75-315-0172
Appendix1-Rev2.0