DUAL DC-MOTOR POSITIONING SYSTEM PRECISE OPERATION ALSO WITH COST
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L6515
DUAL DC-MOTOR POSITIONING SYSTEM
PRECISE OPERATION ALSO WITH COST OPTICAL ENCODER OUTPUT DIGITAL SWITCHED POWER BRIDGES DIRECTION INDICATOR EASY POSITION COUNTING WITH EXTERNAL LOOP GAIN TRANSFER FUNCTIONAL ADJUSTMENT PARALLEL LATCH ADDRESSED INPUTS WITH
MULTIPOWER TECHNOLOGY
PLCC44 ORDERING NUMBER: L6515
LEAD PLCC PACKAGE DESCRIPTION L6515 monolithic integrated circuit BCD-Technology assembled PLCC-44 plastic chip carrier. device contains functions complete dual DC-Motor positioning system. motor driver stage only digital switched bridges needed. SYSTEM BLOCK DIAGRAM (ONE CHANNEL)
Useful L293E, L298, L6203 L6202. device intended drive DC-Motors typewriters, printers, plotters general purpose industrial applications.
1994
1/13
This advanced information product development undergoing evaluation. Details subject change without notice.
L6515
ABSOLUTE MAXIMUM RATINGS
Symbol Tstg, Tamb Supply Voltage Analog Inputs Voltage Logic Inputs Voltage Open Collector Output Current Open Collector Current Zener Current Storage Temperature Operative Ambient Temperature Parameter Value -0.3 -0.3 Unit
CONNECTION (top view)
SYSTEM DESCRIPTION L6515 intended used microprocessor controlled positioning system. motor driver stage only digital operating bridges needed like L293E, L298, L6203, L6202. system operates modes achieve high-speed, high-accurancy positioning. Speed commands system originate microprocessor. continuously updated motor position means pulses from controller chip, which turn gets information from encoder. From this basic input, microprocessor computes 6-bit control word that sets system speed direction dependent distance travel. When motor stopped microprocessor orders position, system oper2/13
ates initially open-loop configuration there feedback from tachometer generator. Therefore maximum current motor. maximum speed reached, tachometer chip output backs processors signal thus reducing accelerating torque. motor continues speed under closed-loop control. target position approached, microprocessor lowers value speed-demand word; this reduces voltage main summing point, effect braking motor. braking applied progressively until motor running minimum speed. that time, microprocessor orders switch position mode, within power stage drives motor null position, where held electronic "detening".
L6515
FUNCTIONS
3,43 4,42 5,41 6,40 7,39 8,38 9,37 10,36 11,35 12,34 Name LCSG LCDI LCDO TSPO TSPI PWMN Description Load Current Decoder Sens Reference Ground Zener Clamp Load Current Decoder Input Load Current Decoder Output Error Amplifier Output Current Mode Modulator Error Amplifier Input Current Mode Modulator Tacho Signal Output Tacho Signal Processor Output Tacho Signal Processor Input Current Mode Output Inverted Current Mode Output Inverted Direction Indicator Digital Open Collector Output. Level High Level Operation Motor Position Counter Digital Open Collector Output Phase Selector Output Signal Differentation Positioning Output. Output Becomes Activated Position Adress Decoder. Analog Input from Position Encoder Phase Proposed Operation Range 2.8V Analog Input from Position Encoder Phase Proposed Operation Range 2.8V Master Current Reference Oscillator Decoder Logic Input Latch Select Reset Major Logic Ground Latch Adress Input Supply Voltage
13,33 14,32 15,31
POSO
16,30
17,29
20,21
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L6515
SCHEMATIC DIAGRAM
4/13
L6515
APPLICATION CIRCUIT
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L6515
ELECTRICAL CHARACTERISTICS (refer test circuit, VS=10V, IREF=300µA, Tamb=25 unless otherwise specified)
Symbol Parameter Operating Supply Voltage Range Quiescent supply current Zener Voltage Operating Zener Current Iz=1mA Test Condition Min. Typ. Max. 11,4 Unit
POSITION ENCODER SECTION
Operating Input Voltage Range Input Bias Current INput-output Offset Voltage Between A/D/1/2 F/1/2 closed Io=0 closed Io=0 =VREF VSAT Output Saturation Voltage Output Leakage Current Threshold Hysteresis voltage Between A/1/2 B/1/2 D/1/2 C/1/2 Output Resistance State Output Operating Voltage E/F/1/2 E/F/1/2 closed referred VREF IO=1mA +1.2 B/C/1/2 Io=1.4mA A/D/1/2 referred VREF -1,65 +1,65
-1.2
OutpUt Operating High Voltage
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L6515
TACHO SIGNAL PROCESSING SECTION
Symbol Parameter Input Voltage G/1/2 Test Condition gain=1 referred VREF Min. -1.65 Typ. Max. +1.65 Unit
Input Bias Current Output Operating Voltage H/1/2 I/1/2 Io=1mA referred VREF closed +1.3 +1.62 closed VIN=VREF closed referred VREF g1/2 shorted H1/2 closed
-1.62 -1.3
Output Operating Voltage Output Resistance State Input Offset Voltage
I/1/2 H/1/2
I1/2 H1/2
Input Offset Voltage
G1/2
Output Matching Resistance
I1/2
ERROR AMPLIFIER SECTION
Input Voltage Input Bias Current Lower Clamping Voltage Higher Clamping Voltage Input Offset Voltage J1/2 K1/2 Io=1ma refered VREF referred VREF K1/2 J1/2 shorted -1.45 +1.06 J1/2 gain=1 -1.22 +1.56
CURRENT DECODER SECTION
VCLH VCDO Output Offset Voltage Output Resistance Current Limit Threshold Differential Output Offset Voltage O1/2 P1/2 L1/2 referred VREF Voff(+) Voff(-) L1/2 N1/2=0 referred VREF ±0.5 ±140
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L6515
OSCILLATOR -PWM SECTIONS
Symbol Parameter Upper Triangle Threshold Lower Triangle Threshold Charge/Discharge Current Output Voltage O1/2 P1/2 IREF=500µA Io=1.4mA Test Condition Referred VREF Min. +1.2 -1.6 ±160 Typ. Max. +1.8 -1.3 ±180 Unit
SECTION
IREF VREF Current Reference Input Range Sink Source Output Current Reference Voltage Linearity Error J1/2 J1/2 IREF=0.5 IREF=20 IREF=0.5 1018 1.61
INPUT LOGIC SECTION
VINL VINH Input Voltage Input High Voltage Input Input High Current High Voltage -0.3
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L6515
APPLICATION CIRCUIT
TRUTH TABLE TACHO-ENCODER LOGIC INPUT SIGNAL
PDIB PDIA PDIB PDIA PDIB PDIA PDIB PDIA HIGH HIGH
SWITCH SIGNAL
CLOSED POSITION TSPO TSPO TSPO TSPO
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L6515
TRUTH TABLE LOGIC SELECTION CHIP ADDRESS DECODER ADDRESS
Terminals ACTION STROBE LATCH STROBE LATCH RESET LATCH Functions
LATCH ADDRESS
TIMING DIAGRAM COUNTER DIRECTION INDICATION LOGIC
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L6515
POSITION ENCODER Main advantage operation principle positioning system that high performance position encoder required. Optical-Encoder with IR-LED Phototransistor Figure system accepts several phases amplitude errors encoder output signal without affecting system performance. position sensors useful.
Magnetic Encoder with hall-effect sensors Figure
allowed spread encoder output signal refer reference level shown Fig.3. Figure
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L6515
PLCC44 PACKAGE MECHANICAL DATA
DIM. MIN. 1.16 1.14 14.99 1.27 12.7 0.46 0.71 0.101 0.046 0.045 17.4 16.51 3.65 2.59 0.68 0.590 0.050 0.500 0.018 0.028 0.004 TYP. MAX. 17.65 16.65 4.57 2.74 MIN. 0.685 0.650 0.144 0.165 0.102 0.027 0.630 inch TYP. MAX. 0.695 0.656 0.146 0.180 0.108
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L6515
Information furnished believed accurate reliable. However, SGS-THOMSON Microelectronics assumes responsibility consequences such information infringement patents other rights third parties which result from use. license granted implication otherwise under patent patent rights SGS-THOMSON Microelectronics. Specifications mentioned this publication subject change without notice. This publication supersedes replaces information previously supplied. SGS-THOMSON Microelectronics products authorized critical components life support devices systems without express written approval SGS-THOMSON Microelectronics. 1994 SGS-THOMSON Microelectronics Rights Reserved SGS-THOMSON Microelectronics GROUP COMPANIES Australia Brazil France Germany Hong Kong Italy Japan Korea Malaysia Malta Morocco Netherlands Singapore Spain Sweden Switzerland Taiwan Thaliand United Kingdom U.S.A.
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