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PDF LV8212T Data sheet ( Hoja de datos )
| Número de pieza | LV8212T | |
| Descripción | System Motor Driver | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : ENA0817
LV8212T
Bi-CMOS IC
For CD and DVD-ROM
System Motor Driver
Overview
The LV8212T is a system motor driver IC that implements all the motor driver circuits required by CD and DVD players in
just a single IC. Since the LV8212T includes both a spindle motor driver and sled, tilt, focus and tracking drivers (as
two-phase stepper method), it can contribute to thinner form factors and miniaturization in end products.
Furthermore, the spindle motor driver uses a direct PWM sensor-less drive method that minimizes the number of external
components and provides highly efficient motor drive.
Function
• PWM H-bridge motor driver (5channels) + direct PWM sensor-less motor driver
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Supply Voltage
Output block supply voltage
Predriver voltage (gate voltage)
Spindle output current
Channel 1 and 2 output current
Channel 3 output current
Channel 4 and 5 output current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VCC max
VS max
VG max
IO max1
IO max2
IO max3
IO max4
Pd max
Topr
Tstg
Independent IC
Conditions
Ratings
6
6
10
1.3
0.8
0.6
0.8
0.45
-30 to +85
-55 to +150
Unit
V
V
V
A
A
A
A
W
°C
°C
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
51607 MS PC B8-8546 No.A0817-1/13
1 page  
Block Diagram
LV8212T
PGND5
RF5
IN5
IN4
CP
CPC
VG
PRE DRIVE
LOGIC
PRE DRIVE
PRE DRIVE
LOGIC
LOGIC
OSC2
SQ
R AREF
PRE DRIVE
LOGIC
AREF
TSD
SQ
VREF
R OSC1
CHARGE
PUMP
SENSORLESS
LOGIC
1/N
SPINDLE
PRE DRIVE
PRE DRIVE
LOGIC
MUTE
AREF
IN1
CF1
OSC
IN2
CF2
IN3
CF3
S/S
BRK
OSC
SPCIN
SPFIL
SELECTOR SPCOM
SPVS
VCTL
SREF
AREF
GSW
SQ
R
VCC GND
FG1 FG3
SUB
UOUT
VOUT
WOUT
SPGND
SPRF
No.A0817-5/13
5 Page 
LV8212T
7. Actuator Block (channel 4 and 5) Current Limiter Circuit
Actuator block : the current limiter circuit detects the PGND4 pin (pin 39 : channel 4) and the PGND5 pin (pin 33 :
channel 5) peak current at the RF4 pin (pin 38 : channel 4) and the RF5 pin (pin 32 : channel 5) and turns the SINK side
transistor off.
8. S/S and MUTE Circuit
The S/S pin (pin 53) functions as the spindle motor driver’s and the actuators motor driver’s start/stop pin ; a
high-level input specifies that the operation is in the start state.
The MUTE pin (pin 52) operates in all the driver blocks except for channels 4 and 5 ; a high-level input mutes these
outputs.
In the muted state, the H-bridge drivers will shift to high-impedance state, regardless of the logic input conditions for
the spindle motor driver, if mute is activated while the motor is active, the motor will slow down as set by the BRK pin
(High means a short break, Low means a reverse torque brake). After the motor stops, all the outputs will become high
(short brake condition).
A low level input must be applied to the S/S pin to set the IC to the standby state (power saving mode).
9. BRK Circuit
The BRK pin (pin 55) switches between reverse torque and short-circuit braking ; a high level selects short-circuit
braking and a low level selects reverse torque braking. When the motor speed becomes adequately slow in the reverse
torque braking state, the application must switch to the short-circuit braking state to stop the motor (Note : The IC
must not be in the power saving state at this point.).
Set the S/S pin (pin 53) to the low level to put the IC in power saving state.
10. FG Output Circuit
The FG3 pin (pin 62) is the spindle block FG output pin. It provides a pulse signal equivalent to that provided by
systems that use three Hall-effect sensors. The FG1 pin (pin 61) outputs a signal that follows the spindle output U
phase back EMF voltage. The FG1 and the FG3 pins both have a MOS open-drain output circuit structure.
This means that external pull-up resistors must be provided. Connect the power supply from the FG signal input side
as the pull-up resistor power supply. We recommended using a resistor of about 10kΩ.
11. Charge Pump Circuit
Since the LV8212T has a DMOS (n-channel) output structure, it includes a charge pump based voltage step-up circuit.
When capacitors (recommended value : 0.22μF of higher) are connected between the CP and CPC pins, the IC
generates a level that is twice the VCC voltage (or 9.5V). It is desirable that this IC be used with the voltage relation
ship between the stepped-up voltage (VG) and the motor supply voltage (VS) meeting the condition VG-VS≥3.5V.
Note that the stepped-up voltage (VG) is, by design, clamped at about 9.5V DC. If the stepped-up voltage (VG)
exceeds 10V (VG max) due to ripple, the value of the VG pin capacitor must be increased.
Observe the following points if the VG voltage is supplied externally.
(1) The externally applied VG voltage must not exceed VGmax in the Absolute Maximum Ratings.
(2) The capacitor between the CP and the CPC pin (pin 57 and 56) is not required.
(3) The sequence in which the VG voltage is applied requires care. The VG voltage must be applied after VCC, and
must be removed before VCC is cut.
(4) Since there is an internal diode between the VCC and VG pins in the IC, a voltage such that VCC>VG must
never be applied to the VG pin.
No.A0817-11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LV8212T.PDF ] | |
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