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Número de pieza | BD8271EFV | |
Descripción | 3ch System Motor Driver | |
Fabricantes | ROHM Semiconductor | |
Logotipo | ||
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No Preview Available ! Datasheet
System Motor Driver Series for CD・DVD・BD Players
3ch System Motor Driver
For Car Audio
BD8271EFV
General Description
BD8271EFV is 3ch power driver developed for driving
stepper motor and DC motor (or actuator coil). Blu-ray’s
motor & coil can be driven, when used along with 6ch
DVD power driver.
Features
■ Each driver of SLED (2ch) and Actuator (1ch) are
installed in a single-chip.
■ ON/OFF and the standby mode of 3ch can be
selected using two control terminals.
■ Built-in triangular wave generator circuit.
■ Adopts HTSSOP-B24 package that has high
power dissipation.
■ Built-in thermal shutdown function.
■ Highly effective SLED driver with PWM drive
system.
■ Built-in 2ch SLED driver that corresponds to the
stepper motor drive.
■ The actuator driver is linear BTL type.
Key Specifications
■ Power Supply Voltage
■ Operating Temperature Range
4.5V to 14V
-40°C to +85°C
■ Output On Resistance (SLED)
■ Output Saturation Voltage (Actuator)
2.2 Ω (Typ)
0.9 V (Typ)
Package
HTSSOP-B24
W(Typ) D(Typ) H(Max)
7.80mm x 7.60mm x 1.00mm
Applications
Car Audio
HTSSOP-B24
Typical Application Circuit
Figure 1. Application Circuit
○Product structure:Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
1/22
TSZ02201-0G1G0BK00250-1-2
1.Oct.2013 Rev.002
http://www.Datasheet4U.com
1 page BD8271EFV
Datasheet
Application Information
1. Driver Control (CTL1, CTL2, VC1, VC2)
All driver output conditions are controlled by switching the CTL1 and CTL2 terminals to High and Low levels.
The table below shows the logic.
(1) High and Low levels
Terminal Pin No
CTL1 Pin21
CTL2 Pin20
VC1 Pin23
VC2 Pin22
L
Less than 0.8V
Less than 0.4V
H
More than 2V
More than 1V
(2) Driver output conditions
CTL1 [Pin21] CTL2 [Pin20]
LL
LH
HL
HH
SLED (Note 1)
BTL
STBY
STBY
SB ACTIVE
ACTIVE
MUTE
ACTIVE
ACTIVE
(Note 1) Refer to the table No.(3).
(a) At VC1=L, stepper outputs become MUTE (VC1 Drop MUTE).
(b) At VC2=L, BTL outputs become MUTE (VC2 Drop MUTE).
(c) At STBY, pre-opamp, internal amplifier, and all outputs are OFF. Outputs become Hi-Z.
At MUTE, all outputs are OFF. Outputs become Hi-Z.
(d) The states of each terminal at STBY and MUTE
At STBY, input terminals (Pin13, 14, 15, 16, 18, 19) become Hi-Z and can not accept any input.
In this case, each VC1 and VC2 terminal (Pin23, 22) is pulled-down to GND with an internal resistance of
360kΩ (Typ).
At MUTE, BTL outputs are pulled-up to the voltage of VMFC/2 by an internal resistance of 20kΩ (Typ).
At VCC Drop MUTE, VC1, 2 Drop MUTE and Thermal Shut Down, outputs become Hi-Z same as MUTE.
(3)Mode table for SLED
Mode
Operation
Active
SB
Normal operation
Compulsion short brake (Note 2)
(Note 2) In this mode, both outputs (positive and negative) of SLED driver become Low regardless of SAIN input.
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
5/22
TSZ02201-0G1G0BK00250-1-2
1.Oct.2013 Rev.002
http://www.Datasheet4U.com
5 Page BD8271EFV
Datasheet
Gain calculation
1. Actuator (with pre-opamp)
VIN
VC1
Rf INO
INN
RIN
VC1
Rf
RIN
Gain = VO = R f × 2 × 2
VIN R IN
RIN = RF(ex.10kΩ)
10kΩ
Gain = 10kΩ × 2× 2 = 12dB
Rf
Vref + RIN ×2×VIN
Vo+
×2
Vref
Level shift
×2
Vo-
Vref -
Rf
RIN
×2×VIN
×2
(Vo+)-(Vo-) → 4 times between outputs
Vo+
Vref
Vo-
Figure 11. Gain Calculation for Actuator
2. SLED (with pre-opamp)
Iopeak 0.25
VIN R SARNF
IO
VO
RL
Vopeak
VIN
0.25
R SARNF
RL
At input resistor RIN connect
Iopeak
=
Rf
×
0.25
[A / V]
VIN RIN RSARNF
Vopeal
VIN
=
Rf
RIN
×
0.25
RSARNF
× RL [V
/
V]
VIN Rf INO
VC2
INN
RIN
VC2
Rf
RIN
RSARNF
Io
SARNF
Io:
Iopeak
SAO + SAO -
RL
Vo
Figure 12. Gain Calculation for SLED
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ22111・15・001
11/22
TSZ02201-0G1G0BK00250-1-2
1.Oct.2013 Rev.002
http://www.Datasheet4U.com
11 Page |
Páginas | Total 25 Páginas | |
PDF Descargar | [ Datasheet BD8271EFV.PDF ] |
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BD8271EFV | 3ch System Motor Driver | ROHM Semiconductor |
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