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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 P (DPWM), without external sensing resistor. The feedback to the P 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 P 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.
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 HEATER HIGH OFF LOW ON
During the ON condition, the specified heater Ron is not guaranteed if all the voltage supplies are not at their minimum nominal value.
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February 1997
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 Motor Output to Supply Voltage Logic Supply Voltage Special Supply Voltage Loading Motor Peak Current (Ton = 1s Duty Cycle = 2%) Drum Motor Peak Current (Ton = 1s Duty Cycle = 2%) Capstan Motor Peak Current (Ton = 1s Duty Cycle = 2%) Logic Input Low State Voltage Logic Input High StateVoltage Open Drain Maximum Voltage Open Drain Maximum Voltage Value 20 20 20 20 20 7 7 1.6 1.4 1.8 -0.1 7 7 20 Unit V (**) V (**) V (**) V(***) V (***) V V A A A V V V V (**)
(**) Not operative - STANDBY condition (***) Each motor driver
PINS CONNECTION
THERMAL DATA
Symbol Rthj-amb R
th j-pins
Parameter Thermal Resistance Junction to Ambient Thermal Resistance Junction to Pin
Value 48 15
Unit C/W C/W
Note: Batwing pin.
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L6287
BLOCK DIAGRAM
CP1 = 0.01F
CP2 = 0.1F
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L6287
PIN DESCRIPTION
VOLTAGE SUPPLIES (The power supply voltage VDD, VDC, VDL must be connected toghether externally) VDD VDC VDL VCC LGND GND R GND L VS SGND DRUM MOTOR DOUT U DOUT V DOUT W DPWM PUD OD OC OT OR COUT U COUT V COUT W CPWM CDIR H1+ H1H2+ H2H3+ H3LOUT A LOUT B LPWM LDIR SERVICES HEATER VCP CP1 CP2 THERM FSTART CTO Open drain output for heater resistor Charge pump storage capacitor pin Bootstrap Capacitor pin Bootstrap Capacitor pin Open drain thermal alarm output Start-up logic signal for drum motor Time out capacitor output Winding Output U Winding Output V Winding Output W PWM logic pulse input. Control signal generated by P for dump motor current regulation. Logic output position feedback generated by the translator logic Optocoupler diode output External capacitor for tacho-converter integrator Input for optocoupler transistor Tacho-converter external resistor. This resistor defines the full-light current level of the tacho. Winding Output U Winding Output V Winding Output W PWM logic pulse input. Control signal generated by P for current regulation. Motor Direction Logic Input Signal Hall sensor differential input Hall sensor differential input Hall sensor differential input Power supply voltage for drump motor Power supply voltage for capstan motor Power supply voltage for loading motor and charge pump Logic voltage supply Logic Ground Capstan + drum power ground Loading + Charge pump Power ground Analog voltage supply Analog ground
Note: The VCC and VS Power Supply must be together either at maximum or minimum value.
CAPSTAN MOTOR
LOADING MOTOR Winding Output A Winding Output B PWM logic input. Direction logic input
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L6287
ELECTRICAL CHARACTERISTICS (Tj = 0 to125C; VCC = VS = 5V 5%; VDC = VDL = VDD = 10 to 18V; unless otherwise specified.) POWER SUPPLY
Symbol (#)VDD (#)VDC (#)VDL VCC VS VCCth Parameter Drum Power Supply Voltage Capstan Power Supply Voltage Loading Power Supply Voltage Logic Power Supply Voltage Sensor Power Supply Voltage Undervoltage Threshold Test Condition Min. 10 10 10 4.5 4.75 3.6 Typ. Max. 18 18 18 5.5 5.25 4.4 Unit V V V V V V
# 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 LPWM 0 0 1 1 Symbol RDSH R DSL (*)IOL (*)Ipl Parameter High Side RDSonH Low Side RDSonL DC Output Current Peak Output Current DUTY CYCLE = 10%; tON = 500ms LDIR 0 1 0 1 LOUTA LOW LOW HIGH LOW Test Condition Min. Typ. OUTPUT LOUTB LOW LOW LOW HIGH Max. 2 2 800 1 Unit mA A
DRUM MOTOR
Symbol Icd (*)Icdp (*)Ipdb RDSH R DSL Parameter DC Output Current Peak Output Current Peak Output Current High Side RDSonH Low Side RDSonL DUTY CYCLE = 10%; tON = 500ms Test Condition Min. Typ. Max. 400 600 800 1.6 1.6 Unit mA mA mA
CAPSTAN MOTOR
Symbol Ico (*)Icop (*)Ipob RDSH R DSL Parameter DC Output Current Peak Output Current Peak Output Current High Side RDSonH Low Side RDSonL DUTY CYCLE = 10%; tON = 1ms Test Condition Min. Typ. Max. 800 1 1.5 1 1 Unit mA A A
(*) 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.
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L6287
ELECTRICAL CHARACTERISTICS (continued) DRUM TACHO CONVERTER
Symbol Iod Iot Ioc Iot vs Ior Vref Parameter Open Loop Output Current Full Light Current Range Sink Current Mismatch Opto Resistor Reference Voltage VS = 4.75V VS = 5V VS = 5.25V VOC Open Loop Opto Capacitor Voltage VOD = 1V see Fig. 1 VS = 4.75V VS = 5V VS = 5.25V VS = 4.75V VS = 5V VS = 5.25V Vthr2 Reset Threshold Voltage VS = 4.75V VS = 5V VS = 5.25V tpud Ipud1 P Syncro Pulse Duration Open Drain Sink Current VO = 0.4V 3.36 3.54 3.72 2.75 Vor = 0; Iod = 0 Test Condition Vod = 1V; Ioc = 100A (Note 1) Min. 30 0.5 0.2 5 Typ. Max. 60 3 0.5 10 3.72 3.91 4.11 Unit mA mA A % V V V V
Vthr1
Clock Threshold Voltage
2.19 2.30 2.42 0.30 0.32 0.33 1 5
2.42 2.54 2.67 0.33 0.35 0.37 3
V V V V V V s mA
Note 1: The suggested Copt external capacitor value is 5F (5%)
HALL COMPARATOR
Symbol Vin Ib V of Vhy Parameter Input Voltage Range Input Bias Current Input Offset Voltage Switchable Hysteresys Vref = 1.5V; 10 Test Condition Min. 0.5 Typ. Max. 2.7 1 8 40 Unit V A mV mV
THERMAL PROTECTION
Symbol Itherm Ts Tsdh Tal1 Tal2 Parameter Open Drain Sink Current Shutdown Temperature Shutdown Hysteresis Early Warning Temperature Last Warning Temperature (see note 2) Test Condition Vout = 0.4V (see note 1) Min. 5 155 170 60 Ts -40 Ts -20 185 Typ. Max. Unit mA
o o o
C C C
C
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 Parameter Heater RDSon Heater Voltage Test Condition Min. Typ. Max. 3 18 Unit ohm V
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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 V il Vih Ri Parameter Input Low Voltage Input High Voltage Pull Up Resistor 2 3.5 10.5 Test Condition Min. Typ. Max. 0.8 Unit V V Kohm
TIME OUT STAGE
Symbol Icto Parameter Time Out Output Current Test Condition (Note 1) Min. 5 Typ. Max. 20 Unit uA
Note 1: The suggested external capacitor value is Cto = 1F (20% max) for fSTART = 20KHz.
Figure 1: Optocircuit Open Loop OC Voltage.
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L6287
SDIP42 PACKAGE MECHANICAL DATA
DIM. MIN. A A1 A2 B B1 c D E E1 e e1 e2 e3 L 2.54 3.30 0.51 3.05 0.38 0.89 0.23 36.58 15.24 12.70 13.72 1.778 15.24 18.54 1.52 3.56 0.10 0.130 3.81 0.46 1.02 0.25 36.83 4.57 0.56 1.14 0.38 37.08 16.00 14.48 mm TYP. MAX. 5.08 0.020 0.120 0.0149 0.035 0.0090 1.440 0.60 0.50 0.540 0.070 0.60 0.730 0.060 0.140 0.150 0.0181 0.040 0.0098 1.450 0.180 0.0220 0.045 0.0150 1.460 0.629 0.570 MIN. inch TYP. MAX. 0.20
E E1
A1
A2
B
B1
e
L
A
e1 e2
D c E 42 22
.015 0,38 Gage Plane
1
21
SDIP42
e3 e2
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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. (c) 1997 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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