STMICROELECTRONICS L6287

L6287
POWER COMBO DRIVER
DESCRIPTION
The F-VHS Motor Driver COMBO IC includes a
double three phase brushless motor driver plus a
DC full bridge motor driver for VCR application.
The package is SDIP42 (38+2+2 pin ground
frame).
The device is realized in BCD technology with
power LDMOS output stages.
The gate drive for high side stages is provided by
an internal charge pump with two external capacitors. The first three phase motor driver is devoted
to the DRUM motor control.
The phase sequence update signal is provided initially by an external start-up signal (FSTART),
whose frequency is internally divided by four,
while, during normal operation, is provided by an
optical tacho converter signal.
This signal is used as clock and reset for the state
machine.
The regulation of the speed is externally provided
by means of PWM signal generated by the µP
(DPWM), without external sensing resistor. The
feedback to the µP unit is given by a suitable
open drain output signal (PUD) synchronized by
the internal state machine.
The second three phase motor driver is devoted
to the CAPSTAN control. While the DRUM will always spin in a fixed direction, the CAPSTAN motor needs a more sophisticated logic to control the
changes in spin direction.
The motor position detection is carried out by
means of three comparators for Hall effect sensors. The loop regulation for this motor is still provided by the µP with the signals CPWM and
CDIR.
The LOADING motor section include a full bridge
DC motor driver. The motor operations are directly set by the inputs LPWM, LDIR according to
the truth table reported on the page 5.
The device also includes a circuit for early thermal alarm, last thermal alarm and thermal shutdown with hysteresys. The output of this stage is
an open drain, kept ON during normal operations.
The THERM signal follows the inverted FSTART
signal between early warning and last warning
temperature, while remains in high impedance
(OFF) after lastwarning temperature and during
thermal shutdown.
February 1997
SDIP42
ORDERING NUMBER: L6287
The STANDBY state of the device is imposed by
THERMAL SHUTDOWN
UNDERVOLTAGE ON VCC SUPPLY
EXTERNAL SIGNAL FSTART;
This state is imposed automatically after a defined time-out.
The time-out is realized by sensing the falling
edges of the FSTART signal: if no edges are recorded for a time interval greater than a certain
time constant, the STANDBY condition is generated.
The time constant is defined by the external capacitor CTO.
In the STANDBY state the main functions (upper
power stages, opto decoder, etc) of the device
are turned off in order to minimize the power consumption.
The device also implement a HEATER function.
The HEATER transistor is OFF during thermal
shutdown, undervoltage condition and during normal working mode.
The HEATER transistor is driven ON when the
external STANDBY condition is present according
to the following table:
FSTART
HIGH
LOW
HEATER
OFF
ON
During the ON condition, the specified heater Ron
is not guaranteed if all the voltage supplies are
not at their minimum nominal value.
1/9
This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
L6287
ABSOLUTE MAXIMUM RATINGS
Symbol
VDD
VDC
VDL
UPPER POWER
VDS MAX
LOWERPOWER
VDS MAX
VCC
VS
Ip1
Ipd
Ipc
Vil
Vih
Vtherm
Vheat
Parameter
Drum Supply Voltage
Capstan Supply Voltage
Loading Supply Voltage
Motor Output to Ground Voltage
Value
20
20
20
20
Unit
V (**)
V (**)
V (**)
V(***)
Motor Output to Supply Voltage
20
V (***)
Logic Supply Voltage
Special Supply Voltage
Loading Motor Peak Current (Ton = 1µs Duty Cycle = 2%)
Drum Motor Peak Current (Ton = 1µs Duty Cycle = 2%)
Capstan Motor Peak Current (Ton = 1µs Duty Cycle = 2%)
Logic Input Low State Voltage
Logic Input High StateVoltage
Open Drain Maximum Voltage
Open Drain Maximum Voltage
7
7
1.6
1.4
1.8
-0.1
7
7
20
V
V
A
A
A
V
V
V
V (**)
(**) Not operative - STANDBY condition
(***) Each motor driver
PINS CONNECTION
THERMAL DATA
Symbol
Value
Unit
Rthj-amb
Thermal Resistance Junction to Ambient
48
°C/W
R
Thermal Resistance Junction to Pin
15
°C/W
th j-pins
Note: Batwing pin.
2/9
Parameter
L6287
BLOCK DIAGRAM
CP1 = 0.01µF
CP2 = 0.1µF
3/9
L6287
PIN DESCRIPTION
VOLTAGE SUPPLIES (The power supply voltage VDD, VDC, VDL must be connected toghether externally)
VDD
Power supply voltage for drump motor
VDC
Power supply voltage for capstan motor
VDL
Power supply voltage for loading motor and charge pump
VCC
Logic voltage supply
LGND
Logic Ground
GND R
Capstan + drum power ground
GND L
Loading + Charge pump Power ground
VS
SGND
Analog voltage supply
Analog ground
Note: The VCC and VS Power Supply must be together either at maximum or minimum value.
DRUM MOTOR
D OUT U
Winding Output U
D OUT V
Winding Output V
D OUT W
Winding Output W
D PWM
PWM logic pulse input. Control signal generated by µP for dump motor current regulation.
PUD
Logic output position feedback generated by the translator logic
OD
Optocoupler diode output
OC
External capacitor for tacho-converter integrator
OT
Input for optocoupler transistor
OR
Tacho-converter external resistor. This resistor defines the full-light current level of the tacho.
CAPSTAN MOTOR
C OUT U
Winding Output U
C OUT V
Winding Output V
C OUT W
Winding Output W
C PWM
PWM logic pulse input. Control signal generated by µP for current regulation.
C DIR
Motor Direction Logic Input Signal
H1+
H1H2+
H2H3+
H3-
Hall sensor differential input
Hall sensor differential input
Hall sensor differential input
LOADING MOTOR
LOUT A
Winding Output A
LOUT B
Winding Output B
LPWM
PWM logic input.
LDIR
Direction logic input
SERVICES
HEATER
Open drain output for heater resistor
VCP
Charge pump storage capacitor pin
CP1
Bootstrap Capacitor pin
CP2
Bootstrap Capacitor pin
THERM
Open drain thermal alarm output
FSTART
Start-up logic signal for drum motor
CTO
4/9
Time out capacitor output
L6287
ELECTRICAL CHARACTERISTICS (Tj = 0 to125°C; VCC = VS = 5V ±5%; VDC = VDL = VDD = 10 to 18V;
unless otherwise specified.)
POWER SUPPLY
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
(#)VDD
Drum Power Supply Voltage
10
18
(#)VDC
Capstan Power Supply Voltage
10
18
V
(#)VDL
Loading Power Supply Voltage
10
18
V
VCC
Logic Power Supply Voltage
4.5
5.5
V
VS
Sensor Power Supply Voltage
4.75
5.25
V
Undervoltage Threshold
3.6
4.4
V
VCCth
# WARNING
The functionality of the I.C. is guaranted in this voltage range. Nevertheless the specified operating voltages (VDC, VDD, VDL), must be selected
according to the load characteristics. Proper cautions must be taken in the application in order to assure that the drain-source voltage across
each output power transistor does not exceed 20V max.
LOADING MOTOR
ACTIVATION TRUTH TABLE
INPUT
OUTPUT
LPWM
LDIR
LOUTA
LOUTB
0
0
LOW
LOW
0
1
LOW
LOW
1
0
HIGH
LOW
1
1
LOW
HIGH
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
RDSH
High Side RDSonH
2
Ω
R DSL
Low Side RDSonL
2
Ω
(*)IOL
DC Output Current
800
mA
(*)Ipl
Peak Output Current
1
A
Max.
Unit
DUTY CYCLE = 10%;
t ON = 500ms
DRUM MOTOR
Symbol
Parameter
Test Condition
Min.
Typ.
DC Output Current
400
mA
(*)Icdp
Peak Output Current
600
mA
(*)Ipdb
Peak Output Current
800
mA
RDSH
High Side RDSonH
1.6
Ω
R DSL
Low Side RDSonL
1.6
Ω
Max.
Unit
800
mA
1
A
1.5
A
Icd
DUTY CYCLE = 10%;
tON = 500ms
CAPSTAN MOTOR
Symbol
Ico
Parameter
Test Condition
DC Output Current
Min.
Typ.
(*)Icop
Peak Output Current
(*)Ipob
Peak Output Current
RDSH
High Side RDSonH
1
Ω
R DSL
Low Side RDSonL
1
Ω
DUTY CYCLE = 10%;
tON = 1ms
(*) WARNING
These current values are compatible with the structure of the IC power structure. Nevertheless the use of these current levels could produce
junction temperatures that force IC outside of the operative range due to the thermal characteristics of the choosen package.
5/9
L6287
ELECTRICAL CHARACTERISTICS (continued)
DRUM TACHO CONVERTER
Symbol
Parameter
Iod
Open Loop Output Current
Iot
Full Light Current Range
Ioc
Sink Current
Iot vs Ior
Vref
VOC
Vthr1
Vthr2
Test Condition
Min.
Vod = 1V; Ioc = 100µA (Note 1)
30
60
mA
0.5
3
mA
0.5
µA
10
%
Vor = 0; Iod = 0
Typ.
0.2
Mismatch
5
Opto Resistor Reference
Voltage
Open Loop Opto Capacitor
Voltage
Clock Threshold Voltage
Reset Threshold Voltage
tpud
µP Syncro Pulse Duration
Ipud1
Open Drain Sink Current
Max.
Unit
VS = 4.75V
3.36
3.72
V
VS = 5V
3.54
3.91
V
VS = 5.25V
3.72
4.11
V
VOD = 1V see Fig. 1
VS = 4.75V
VS = 5V
VS = 5.25V
2.75
V
VS = 4.75V
2.19
2.42
V
VS = 5V
2.30
2.54
V
VS = 5.25V
2.42
2.67
V
VS = 4.75V
0.30
0.33
V
VS = 5V
0.32
0.35
V
VS = 5.25V
0.33
0.37
V
1
3
µs
VO = 0.4V
5
mA
Note 1: The suggested Copt external capacitor value is 5µF (±5%)
HALL COMPARATOR
Symbol
Parameter
Vin
Input Voltage Range
Ib
Test Condition
Min.
Typ.
0.5
Max.
Unit
2.7
V
Input Bias Current
1
V of
Input Offset Voltage
8
µA
mV
Vhy
Switchable Hysteresys
40
mV
Max.
Unit
Vref = 1.5V;
10
THERMAL PROTECTION
Symbol
Parameter
Itherm
Open Drain Sink Current
Ts
Shutdown Temperature
Tsdh
Shutdown Hysteresis
Tal1
Early Warning Temperature
Tal2
Last Warning Temperature
Test Condition
Vout = 0.4V (see note 1)
Min.
Typ.
5
155
(see note 2)
mA
o
C
60
o
C
Ts -40
o
C
Ts -20
°C
170
185
NOTE 1: Therm output stage is on in the normal temperature range
NOTE 2: In the Tal-Tll temperature range therm signal follows the inverted Fstart signal. After Tll temperature this output is always in high
impedance. If thermal shutdown is reached this pin will remain in this state un til the shutdown hysteresys will be recovered.
HEATER
Symbol
R dsheat
Vheat
6/9
Max.
Unit
Heater RDSon
Parameter
Test Condition
Min.
Typ.
3
ohm
Heater Voltage
18
V
L6287
ELECTRICAL CHARACTERISTICS (continued.)
LOGIC LEVELS FOR DIGITAL INPUTS (CPWM, CDIR, DPWM, FSTART, LPWM, LDIR)
A pull up resistor Ri is connected between the CDIR, FSTART, LPWM, LDIR inputs pads; CPWM and DPWM
are left unconnected.
Symbol
Parameter
V il
Input Low Voltage
Vih
Input High Voltage
Ri
Pull Up Resistor
Test Condition
Min.
Typ.
Max.
0.8
2
Unit
V
V
3.5
10.5
Kohm
Max.
Unit
20
uA
TIME OUT STAGE
Symbol
Icto
Parameter
Time Out Output Current
Test Condition
(Note 1)
Min.
5
Typ.
Note 1: The suggested external capacitor value is Cto = 1µF (±20% max) for fSTART = 20KHz.
Figure 1: Optocircuit Open Loop OC Voltage.
7/9
L6287
SDIP42 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
inch
TYP.
MAX.
A
MIN.
TYP.
MAX.
5.08
0.20
A1
0.51
0.020
A2
3.05
3.81
4.57
0.120
0.150
0.180
B
0.38
0.46
0.56
0.0149
0.0181
0.0220
B1
0.89
1.02
1.14
0.035
0.040
0.045
c
0.23
0.25
0.38
0.0090
0.0098
0.0150
D
36.58
36.83
37.08
1.440
1.450
1.460
E
15.24
16.00
0.60
E1
12.70
14.48
0.50
13.72
0.629
0.540
e
1.778
0.070
e1
15.24
0.60
0.570
e2
18.54
0.730
e3
1.52
0.060
L
2.54
3.30
3.56
0.10
0.130
0.140
E
A2
A
L
A1
E1
B
B1
e
e1
e2
D
c
E
42
22
.015
0,38
Gage Plane
1
e3
21
e2
SDIP42
8/9
L6287
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as criticalcomponents in life support devices or systems without express
written approval of SGS-THOMSON Microelectronics.
 1997 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
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