L6219L-S24-R

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UNISONIC TECHNOLOGIES CO., LTD L6219 LINEAR INTEGRATED CIRCUIT www.unisonic.com.tw 1 of 6 Copyright © 2005 Unisonic Technologies Co., Ltd QW-R109-005,B DUAL FULL-BRIDGE PWM MOTOR DRIVER „ DESCRIPTION The L6219 motor driver is designed to drive both windings of a bipolar stepper motor or bidirectionally control two dc motors. Both bridges are capable of sustaining 45V and include internal pulse-width modulation (PWM) cont rol of the output current to 750mA .The outputs have been optimized for a low output saturation voltage drop (less than 1.8V total source plus sink at 500mA ). For PWM current control, t he maximum output current is determined by the user’s select ion of a reference voltage and sensing resistor. Two logic-level i nputs select output current limits of 0, 33, 67,or 100% of the maxi mum level. A phase input to each bridge determines load current direction. The bridges include both ground clamp and flyback diodes for protection against inductive transie nts. Internally generated delays prevent cross-over currents when switching current direction. Special power-up sequencing is not required. Thermal protection circuitry disables the outputs if the chip temperature exceeds safe operating limits. „ FEATURES *Interchangeable with SGS L6219 *750mA Continuous Output Current *45V Output Sustaining Voltage *Internal Clamp Diodes *Internal PWM Current Control *low Output Saturation Voltage *Internal Thermal Shutdown Circuitry SOP-24 *Pb-free plating product number: L6219L „ ORDERING INFORMATION Order Number Normal Lead Free Plating Package Packing L6219-S24-R L6219L-S24-R SOP-24 Tape Reel L6219-S24-T L6219L-S24-T SOP-24 Tube L6219L-S24-R (1)Packing Type (2)Package Type (3)Lead Plating (1) R: Tape Reel, T: Tube (2) S24: SOP-24 (3) L: Lead Free Plating, Blank: Pb/Sn

L6219 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 2 of 6 www.unisonic.com.tw QW-R109-005,B „ PIN CONFIGURATION GROUND GROUND SENSE2 RC2 VREF2 PHASE2 I12 I02 OUT2B COMP IN2 OUT2A OUT1A LOAD SUPPLY SENSE1 COMP IN1 OUT1B I01 GROUND GROUND I11 PHASE1 VREF1 RC1 LOGIC SUPPLY Vcc PWM2 PWM1 VBB „ PWM CURRENT-CONTROL CIRCUITRY CHANNEL 1 TERMINAL NUMBERS SHOWN 40kƸ ONE SHOT SOURCE DISABLE 10kƸ 20kƸ VBB OUTA OUTB VREF SENSE RS RC CC RT CT RC ÷ 10 COMP IN 1 21 „ TRUTH TABLE PHASE OUTA OUTB H H L L L H

L6219 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 3 of 6 www.unisonic.com.tw QW-R109-005,B „ TYPICAL APPLICATION FROM DŽP VBB STEPPER MOTOR +5V FROM DŽP VREF RT CT VREF RS Rc Cc RS Rc Cc 13Vcc PWM2 PWM1 VBB RTCT

L6219 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 4 of 6 www.unisonic.com.tw QW-R109-005,B „ ABSOLUTE MAXIMUM RATINGS (Ta = 25 )Ċ PARAMETER SYMBOL RATINGS UNIT Motor Supply Voltage V BB 45 V Peak 1.0 A Output Current Continuous IOUT 750 mA Logic Supply Voltage V CC 7.0 V Logic Input Voltage Range V IN -0.3 ~ +7.0 V Output Emitter Voltage V SENSE 1.5 V Package Power Dissipation P D See graph Junction Temperature T J 125 °C Operating Temperature T OPR -20~+85 °C Storage Temperature T STG -40 ~ +150 °C Note 1.Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. 2.The device is guaranteed to meet performance specification within 0Ċ~+70°C operating temperature range and assured by design from -20Ċ~+85°C. 3.Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the specified peak current rating or a junction temperature of +150°C „ ELECTRICAL CHARACTERISTICS(Ta=25°C, VCC=4.75V to 5.25V, VBB=45V, TJ≤150°C, VREF=5.0V) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Output Drivers(OUTA or OUTB) Motor Supply Range V BB 10 - 45 V VOUT=VBB - <1.0 50 µA Output Leakage Current I LEAK VOUT=0 - <-1.0 -50 µA Output Sustaining Voltage V CE(SUS) IOUT=750mA,L=3.0mH 45 - - V Sink Driver, IOUT=+500mA - 0.4 0.6 V Sink Driver, IOUT=+750mA - 1.0 1.2 V Source Driver, IOUT= -500mA - 1.0 1.2 V Output Saturation Voltage V CE(SAT) Source Driver, IOUT= -750mA - 1.3 1.5 V Clamp Diode Leakage Current I R V R=45V - <1.0 50 µA Clamp Diode Forward Voltage V F I F=750mA - 1.6 2.0 V IBB(ON) Both Bridges On, No Load - 20 25 mADriver Supply Current IBB(OFF) Both Bridge Off - 5.0 10 mA Control Logic VIN(1) All Inputs 2.4 - - V Input Voltage VIN(0) All Inputs - - 0.8 V VIN=2.4V - <1.0 20 µA Input Current I IN(1) VIN=0.8V - -3.0 -200 µA Reference Voltage Range V REF Operating 1.5 - 7.5 V I0=I1=0.8V 9.5 10 10.5 - I0=2.4V,I1=0.8V 13.5 15 16.5 - Current Limit Threshold (at trip point) VREF/VCOMPIN ICC(ON) I 0=I1=0.8V ,No Load - 40 50 Total Logic Supply Current ICC(OFF) I 0=I1=2.4V ,No Load - 10 12 mA Thermal Shutdown Temperature T SHDN - 170 - °C

L6219 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 5 of 6 www.unisonic.com.tw QW-R109-005,B „ PWM CURRENT CONTROL The L6219 dual bridge is designed to drive both windings of a bipolar stepper motor. Output current is sensed and controlled independently in each bridge by an external sense resistor (Rs), internal comparator, and monostable multivibrator. When the bridge is turned on, current increases in the motor winding and it is sensed by the external sense resistor until the sense voltage (VCOMPIN) reaches the level set at the comparator’s input :ITRIP=VREF/10Rs The comparator then triggers the monostable which turns off the source driver of the bridge. The actual load current peak will be slightly higher than the trip point (especially for low-inductance loads) because of the internal logic and switching delays. This delay (td)is typically 2µs.After turn-off, the motor current decays, circulating through the ground-clamp diode and sink transistor. The source driver’s off time (and therefore the magnitude of the current decrease)is determined by the monostable’s external RC timing components, where tOFF=RTCT within the range of 20kΩ to 100kΩ and 100pF to 1000pF When the source driver is re-enabled, the winding current (the sense voltage) is again allowed to rise to the comparator’s threshold. This cycle repeats itself, maintaining the average motor winding current at the desired level. Loads with high distributed capacitances may result in high turn-on current peaks. This peak (appearing across Rs) will attempt to trip the comparator, resulting in erroneous current control or high-frequency oscillations. An external RCCC time delay should be used to further delay the action of the comparator. Depending on load type, many applications will not require these external components (SENSE connected to COMP IN). PWM OUTPUT CURRENT WAVE FORM VPHASE ITRIP tOFFtD IOUT LOAD CURRENT PATHS VBB RS BRIDGE ON SOURCE OFF ALL OFF

L6219 LINEAR INTEGRATED CIRCUIT UNISONIC TECHNOLOGIES CO., LTD 6 of 6 www.unisonic.com.tw QW-R109-005,B „ TYPICAL CHARACTERISTIC 0.5 50 100 1.0 1.5 2.5 125 150 Temperature, inĊ 2.0 RǀJT=6Ċ/W Allowable package power dissipation in watts RǀJT=55Ċ/W UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.