UC1634 UC2634 UC3634 Phase Locked Frequency Controller FEATURES DESCRIPTION • Precision Phase Locked Frequency Control System • Communication Logic for 2-Phase Motors • Disable Input for Motor Inhibit • Crystal Oscillator The UC1634 series of devices is optimized to provide precision phase locked frequency control for two phase DC brushless motors. These devices include most of the features of the general purpose UC1633 Phase Locked Control family and also provide the out-of-phase commutation signals required for driving two phase brushless motors. Only an external power booster stage is required for a complete drive and control system. • Programmable Reference Frequency Dividers • Phase Detector with Absolute Frequency Steering • Digital Lock Indicator • Two High Current Op-Amps • 5V Reference Output BLOCK DIAGRAM 6/93 The two commutation outputs are open collector devices that can sink in excess of 16mA. A disable input allows the user to simultaneously force both of these outputs to an active low state. Double edge logic, following the sense amplifier, doubles the reference frequency at the phase detector by responding to both edges of the input signal at Pin 7. UC1634 UC2634 UC3634 ABSOLUTE MAXIMUM RATINGS (Note 1, 2) Input Supply Voltage (+VIN). . . . . . . . . . . . . . . . . . . . . . . . +20V Reference Output Current . . . . . . . . . . . . . . . . . . . . . . . -30mA Op-Amp Output Currents . . . . . . . . . . . . . . . . . . . . . . . . ±30mA Op-Amp Input Voltages . . . . . . . . . . . . . . . . . . . . . -.3V to +20V Phase Detector Output Current . . . . . . . . . . . . . . . . . . . ±10mA Lock Indicator Output Current . . . . . . . . . . . . . . . . . . . . +15mA Lock Indicator Output Voltage . . . . . . . . . . . . . . . . . . . . . . +20V Divide Select Input Voltage . . . . . . . . . . . . . . . . . . -.3V to +10V Disable Input Voltage . . . . . . . . . . . . . . . . . . . . . . . -.3V to +10V Oscillator Input Voltage . . . . . . . . . . . . . . . . . . . . . . -.3V to +5V Sense Amplifier Input Voltage . . . . . . . . . . . . . . . . -.3V to +20V Driver Output Currents . . . . . . . . . . . . . . . . . . . . . . . . . . +30mA Driver Output Voltages . . . . . . . . . . . . . . . . . . . . . . . . . . . . +20V Power Dissipation at TA = 25°C(Note 2) . . . . . . . . . . . 1000mW Power Dissipation at TC = 25°C (Note 2) . . . . . . . . . . . 2000mW Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C Storage Temperature . . . . . . . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (Soldering, 10 Seconds) . . . . . . . . . . 300°C Note 1: Voltages are referenced to ground, (Pin 16, DIL Package). Currents are positive into, negative out of, the specified terminals. Note 2: Consult Packaging Section of Databook for thermal limitations and considerations of package. CONNECTION DIAGRAMS PLCC-20 (TOP VIEW) Q Package PACKAGE PIN FUNCTION FUNCTION PIN N/C DIV 2/4/8 Lock Indicator Output Phase Detector Output Disable Input N/C Driver A Output Driver B Output Sense Amp Output 5V Ref Output Loop Amp Inv Input Loop Amp Output Buffer Amp Input Buffer Amp Output +VIN N/C OSC Output OSC Input Ground DIV 4/5 Input DIL-16, SOIC-16 (TOP VIEW) J or N Package, DW Package 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the UC3634, -25°C to + 85°C for the UC2634 and -55°C to +125°C for the UC1634, +VIN = 12V. TA=TJ. PARAMETERS Supply Current TEST CONDITIONS +VIN = 15V Reference Output Voltage (VREF) Load Regulation Line Regulation Short Circuit Current Oscillator DC Voltage Gain MIN 4.75 IOUT = 0mA to 7mA +VIN = 8V to 15V VOUT = 0V 12 MAX UNITS 20 29 mA 5.0 5.0 5.25 20 V mV 2.0 20 mV 30 mA 12 16 20 dB Input DC Level (VIB) Input Impedance (Note 3) Oscillator In Pin Open, TJ = 25°C VIN = VIB ± 0.5V, TJ = 25°C 1.15 1.3 1.3 1.6 1.45 1.9 V kΩ Output DC Level Maximum Operating Frequency Oscillator In Pin Open, TJ = 25°C 1.2 10 1.4 1.6 V MHz Input = 1VPP at Oscillator In 10 Input = 5V (Div. by 4) Input = 0V (Div. by 5) -5.0 Dividers Maximum Input Frequency Div. 4/5 Input Current (Q Package Only, Note 4) Oscillator In to Oscillator Out TYP 2 MHz 150 0.0 500 5.0 µA µA UC1634 UC2634 UC3634 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = 0°C to +70°C for the UC3634, -25°C to + 85°C for the UC2634 and -55°C to +125°C for the UC1634, +VIN = 12V. TA=TJ PARAMETERS Dividers (cont.) Div. 4/5 Input Threshold (Q Package Only, Note 4) Div. 2/4/8 Input Current Div. 2/4/8 Open Current Voltage Div. by 2 Threshold Div. by 4 Threshold Div. by 8 Threshold TEST CONDITIONS MIN TYP 0.5 1.6 2.2 V 150 500 µA -150 2.5 0.8 3.5 µA V V 3.5 V Input = 5V (Div. by 8) MAX UNITS Input = 0V (Div. by 2) Input Current = 0µA (Div. by 4) -500 1.5 0.20 Volts Below VREF 0.20 0.8 Percent of VREF 27 33 Input = 1.5V -1.0 30 10 -0.2 % mV µA 0.3 0.1 0.6 5.0 V µA -5.0 0.5 150 0.0 1.6 500 5.0 2.2 µA µA V 47 2.0 2.0 4.5 0.2 0.2 50 8.0 5.0 6.0 0.5 0.5 53 7.5 V V % mA mA kΩ 0.3 0.1 0.45 1.0 V µA 53 1.5 V Sense Amplifier Threshold Voltage Threshold Hysteresis Input Bias Current Two Phase Drive Outputs, A and B Saturation Voltage Leakage Current Disable Input Input Current Threshold Voltage Phase Detector High Output Level Low Output Level Mid Output Level High Level Maximum Source Current Low Level Maximum Sink Current Mid Level Output Impedance (Note 3) Lock Indicator Output Saturation Voltage Leakage Current Loop Amplifier IOUT = 16mA VOUT = 15V Input = 5V (Disabled, A and B Outputs Active Low) Input = 0V (Enabled) Positive Phase / Freq. Error, Volts Below VREF Negative Phase / Freq. Error Zero Phase / Freq. Error, Percent of VREF VOUT = 4.3V VOUT = 0.7V IOUT = -200 to +200µA, TJ = 25°C Freq. Error, IOUT = 5mA Zero Freq. Error, VOUT = 15V N INV. Reference Voltage Percent of VREF 47 50 Input Bias Current AVOL PSRR Input = 2.5V -0.8 60 70 -0.2 75 100 µA dB dB 16 16 35 30 mA mA -0.8 70 -0.2 100 µA dB Source, VOUT = 0V 70 16 100 35 dB mA Sink, VOUT = 5V 16 30 mA Short Circuit Current +VIN = 8V to 15V Source, VOUT = 0V Sink, VOUT = 5V Buffer Op-Amp Input Offset Voltage Input Bias Current PSRR CMRR Short Circuit Current VCM = 2.5V 8 VCM = 2.5V +VIN = 8 to 15V VCM = 0 to 10V % mV Note 3: These impedance levels will vary with TJ at about 1700ppm/°C. Note 4: This part is also available in a 20 pin plastic leadless chip carrier, Q designator, where a divide by 4/5 select pin is available. Consult factory for details. 3 UC1634 UC2634 UC3634 APPLICATION AND OPERATION INFORMATION (For additional information see UC1633 data sheet) Design Example: Precision phased locked frequency control of a 2-phase motor at 3600 RPM. Using the commutation logic on the UC3634, a simple discrete drive scheme is possible. UNITRODE INTEGRATED CIRCUITS 7 CONTINENTAL BLVD. • MERRIMACK, NH 03054 TEL. (603) 424-2410 • FAX (603) 424-3460 4 IMPORTANT NOTICE Texas Instruments and its subsidiaries (TI) reserve the right to make changes to their products or to discontinue any product or service without notice, and advise customers to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. 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