AN8387 [PANASONIC]
2-channel Linear Driver; 双通道线性驱动型号: | AN8387 |
厂家: | PANASONIC |
描述: | 2-channel Linear Driver |
文件: | 总6页 (文件大小:72K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
ICs for CD/CD-ROM Player
AN8387S
2-channel Linear Driver
■ Overview
Unit : mm
The AN8387S is an IC which incorporates 2 circuits of
BTL drivers for driving various DC motors such as actua-
tors (focus, tracking traverse), spindles, and loading of
the CD players.
20
19
18
17
16
15
14
13
12
11
1
2
3
4
5
■ Features
6
•
Operating supply voltage range ; VCC=3.5V to 9V
7
PVCC=1.5V to 9V
8
9
•
Built-in 2 circuits of voltage driven BTL drivers
(maximun drive current : 500mA)
Quiescent current (current consumption at no input) ;
3.2mA
10
•
•
•
•
Provided with power control pin
5.5±0.3
7.6±0.3
(0.4)
Provided with driver output voltage limiting pin
Built-in thermal protective circuit
(operating temperature : 160°C typ.)
20-Lead SOP Package (SOP020-P-0300A)
■ Applications
Linear driving of the DC motors and actuators of the
CD players. CD radio cassette tape recorders, and so
on.
■ Block Diagram
8
9
4
3
2
7
a
VCC
GND
VREF
SW
10kΩ
1kΩ
+
–
+ –
Thermal
Shutdown
Absolute
Value
Absolute
Value
Base
Current
Control
Base Power
Control
11
20
b
BTL
BTL
P.VCC
c
14
13
17
18
P.GND
a) VCC
: Pin1, Pin10
b) P.VCC : Pin12, Pin19
c) PGND : Pin5, Pin6, Pin15, Pin16
ICs for CD/CD-ROM Player
AN8387S
■ Absolute Maximum Ratings (Ta=25˚C)
Parameter
Symbol
Rating
Unit
V
Supply Voltage
VCC
PD
10
Power Dissipation
1,200 Note)
–30 ~ +85
–55 ~ +125
mW
˚C
Operating Ambient Temperature
Storage Temperature
Topr
Tstg
˚C
Note) When mounted onto the glass epoxy PCB (50mm × 50mm × 0.8mm)
■ Recommended Operating Range (Ta=25˚C)
Parameter
Symbol
Range
VCC
3.5V ~ 9V
1.5V ~ 9V
Operating Supply Voltage Range
P.VCC
■ Electrical Characteristics (Ta=25˚C)
Parameter
Symbol
Condition
min.
1
typ.
max.
3.5
3.5
1
Unit
mA
mA
µA
V
Current Consumption at No Input (VCC
)
IVCCQ
IPVCCQ
IPVCCL
VrefH
VCC=9V, Vref=4.5V, PVCC=9V
VCC=9V, Vref=4.5V, PVCC=9V
2
Current Consumption at No Input (PVCC
PVCC Leak Current
Vref Threshold (H) Note 1)
)
0.7
1.2
VCC=0V, Vref=OPEN, PVCC=10V
VCC=3V, PVCC=10V, VIN=0V
VCC=3V, PVCC=10V, VIN=0V
1.45
V
ref Threshold (L) Note 2)
VrefL
1
V
VCC=5V, Vref=2.5V,
VIN=2.4→2.6V
RAIN
0.75
1
1.25
kΩ
Input Amp. Input Impedance
Driver Input Offset Voltage Note 3)
Driver Output Offset Voltage Note 3)
Driver Dead Zone Width Note3)
Driver Transfer Gain (+) Note3)
Driver (+), (–) Transfer Gain Ratio Note 3)
VI offset
VO offset
VCC=9V, Vref=4.5V, PVCC=9V
VCC=9V, Vref=4.5V, PVCC=9V
VCC=9V, Vref=4.5V, PVCC=9V
VCC=9V, Vref=4.5V, PVCC=9V
VCC=9V, Vref=4.5V, PVCC=9V
–10
–55
–10
13
0
0
10
55
19
17
0.5
mV
mV
mV
dB
|VDZ
G+
|
15.1
RG
–1.9
– 0.9
dB
VCC=9V, Vref=4.5V, PVCC=9V,
VLIM=0V
Driver Output Voltage
VOLG
–130
2.25
130
3
mV
V
VCC=9V, Vref=4.5V, PVCC=9V,
VLIM=3V
|VOL
Vsat
|
Driver Output Voltage Absolute Value
Driver Power Transistor Saturation
Voltage
V
CC=9V, Vref=4.5V, PVCC=9V,
IO=300mA
CC=9V, Vref=2.5V, PVCC=5V,
VIN=2.3V
CC=9V, Vref=2.5V, PVCC=5V,
0.29
0.38
V
V
PC Input Pin Threshold Voltage (H) Note 4)
VPC THH
2.8
0.9
V
V
PC Input Pin Threshold Voltage (L) Note 5)
Protective Diode Forward Voltage
VPC THL
VPD
0.8
1.8
V
V
VIN=2.3V
1.5
IO=300mA
Thermal Protective Circuit Operating
Temperature
TTHD
160
˚C
Note1) Vref voltage required to operate the driver.
Note2) If Vref is made lower than this voltage, the driver dose not operate.
Note3) Refer to the driver input/output characteristics chart.
Note4) If the PC pin voltage is made higher than this voltage, there will be no output voltage from the driver. Both (+) and (–)
outputs are pulling in the current.
Note5) If the PC pin voltage is made lower than this voltage, the driver operates normally.
ICs for CD/CD-ROM Player
AN8387S
■ Application Circuit
P VCC
M
M
20
19
18
17
16
15
14
13
12
11
10
AN8387S
1
2
3
4
5
6
7
8
9
Error Signal1
VREF
Error Signal2
VCC
■ Pin Descriptions
Pin No. Symbol
I/O
DC Voltage
4.8V
Equivalent Circuit
1
Description
1
VCC pin.
VCC
10
I
I
I
I
I
Not connected to the PVCC pin.
10
Error signal input pin for
the channel-1 driver
2
9
3
8
IN1
IN2
PC1
PC2
2.5V
2.5V
0V
2
–
+
1kΩ
or
9
Error signal input pin for
the channel-2 driver
4
Operational amplifier is of PNP differential input
Input pin for the PC
(inter-output voltage of the
channel-1 driver OFF)
1kΩ
3
or
8
100kΩ
50kΩ
Input pin for the PC
(inter-output voltage of the
channel-2 driver OFF)
0V
ICs for CD/CD-ROM Player
AN8387S
■ Pin Descriptions (Cont.)
Pin No. Symbol
I/O
DC Voltage
Equivalent Circuit
Description
30kΩ
40kΩ
4
4
Vref
I
2.5V
Vref input pin
5
6
5
6
15
16
PGND
P.GND
O
O
I
0V
0V
P.GND pin
15
16
7
7
GND
GND pin
VLIM pin for the channel-2
driver.
Used when limiting the output
voltage of the pins 13 and 14
VCC
PVCC
11
20
VLIM2
VLIM1
VCC
11
or
VLIM pin for the channel-1
driver.
Used when limiting the output
voltage of the pins 17 and 18
20
I
VCC
12
19
12
19
Power VCC pin.
Supplies the driver current.
PVCC
I
3V
× 2
PGND
ICs for CD/CD-ROM Player
AN8387S
■ Pin Descriptions (Cont.)
Pin No. Symbol
I/O
DC Voltage
Equivalent Circuit
Description
Non-inverting output pin
for the channel-2 driver
PVCC
13
14
17
18
D2+
D2–
D1–
D1+
O
(2.7V)
Inverting output pin for the
channel-2 driver
O
O
O
(0.3V)
(0.3V)
(2.7V)
Inverting output pin for the
channel-1 driver
13 14
or
or
Non-inverting output pin
for the channel-1 driver
PGND
18 17
■ Supplementary Explanation
• Operational Description
The AN8387S incorporates the two channels of drivers. Since both channels have the identical functions, the following
describes the channel-1 driver.
• Block Diagram (Channel 1 driver)
PVCC
Error Amp.
19
20
IA
Current
Absolute
Value
–
+
VLIM
IA
Circuit
IA
Direction
Decision
A
Q1
Q2
+
SW.A
SW.B
SW.C
R1
57.6
R2
57.6
SW. C
SW.B
SW.A
kΩ
kΩ
Vref
S.W
–
1kΩ
Thermal
Shutdown
PC
Q3
Q4
IA=0
SW.B
SW.C
2
4
3
17
18
–
+
RIN
1
2
(RL=8.2Ω)
Vref (= VCC
)
An error signal (VIN) input to the pin2 is converted into the absolute value input current IA through the error amplifier and
current absolute value circuit. The value of IA is as follows.
ICs for CD/CD-ROM Player
AN8387S
|VIN –Vref
RIN+1kΩ
|
IA =
–V– | is limited within the following range.
2.25V ≤ |V+ –V– | ≤ 3V
1) When VIN>Vref, the direction determining circuit operates
so that the following conditions are met.
When the pin20 is short-circuited to GND,
|V+ –V– | ≤ 130mV results regardless of an input error signal
(VIN).
+
SW.A :
SW.B : ON
If the pin20 is prepared to short-circuit to GND at power-on of
the set, it can be used to prevent operation error at power-on
of the motor or actuator.
SW.C : OFF
2) When VIN<Vref, the direction determining circuit operates
so that the following conditions are met.
When the pin20 is not used, short-circuit it to the pins1 and
10.
–
SW.A :
SW.B : OFF
The pin3 is a PC pin. If a voltage of 2.8V or more is
applied to this pin, SW.B and SW.C are turned on, IA becomes
0mA, and the base current flows to the bases of Q3 and Q4
simultaneously to turn on Q3 and Q4. As a result, the
pins17 and 18 are almost short-circuited to P.GND.
This IC incorporates the thermal shutdown circuit. If
the chip temperature of the IC comes to about 160˚C,
both drivers of the two channels are turned off. (the output
pins17, 18, 14, and 13 are short-circuited to P.GND)
Similarly, if the applied voltage (Vref) of the Vref pin4
comes to 1V or less, both drivers of the two channels are
turned off.
SW.C : ON
The output (V+–V–) between the pins18 and 17 has the
following relation with the input (VIN –Vref) between the
pins 2 and 4.
57.6kΩ
RIN+1kΩ
(VIN –Vref)
(V+ –V–) =
Therefore, the driver’s gain G will be as follows. (when the
motor load RL is 8.2Ω)
(V+ –V–)
(VIN –Vref)
57.6kΩ
1kΩ + RIN
G =
=
The output voltage V_ of the pin17 and V+ of the pin18 can
be limited by applying a voltage to the VLIM pin20.
For example, if a voltage of 3V is applied to the pin20
when VCC = 9V and RL = 8.2Ω, the maximum value of |V+
• Driver Input/Output Characteristics
• Characteristics Curve
Input Offset (VIOF
)
Output Offset (VOOF
Dead Zone (|VDZ|)
)
Transfer Gain (+) (G+)
(+), (–) Transfer Gain Ratio (RG)
PD –Ta
VCC = 9V
P VCC = 9V
.
Vref = 4.5V
Output
V1, V2
B5
2000
G–
0.25V
When Mounted to PCB : Material. Glass Epoxy PCB.
…
Size 5cm × 5cm × 0.8mm
θj– a=83.3˚C/W
1800
1600
1400
1200
1000
800
B4
VIOF
VOOF
Input
VIN
4.43V 4.45V
B3
4.5V
4.55V
4.57V
600
|VDZ
|
400
200
0
B2
B1
C–
– 0.25V
0
20
40
60
80
100
120
140
Ambient Temperature Ta (˚C)
B5–B4
20mV
B2–B1
20mV
G+
G–
G+ =
G– =
RG =
,
,
相关型号:
©2020 ICPDF网 联系我们和版权申明