UNISONIC TECHNOLOGIES CO., LTD UH477 Preliminary LINEAR INTEGRATED CIRCUIT SINGLE PHASE DC MOTOR DRIVE IC DESCRIPTION The UTC UH477 is particularly designed for a single phase DC motor driver circuit. It includes hall sensor and output coil drivers. The range of the operating voltage and the operation current is typically 0.3A. The UTC UH477 is a well performance integrated IC with less required external components. The high sensitivity of Hall effect sensor is suitable for motors from mini-type CPU coolers to blowers and DC fans. FEATURES * Operating Voltage Ranges Widely from 3.0V to 30V * 1 Chip Hall Sensor/Drivers * Output Thermal Shutdown Protect Circuit * Output Sink Current up to 300mA ORDERING INFORMATION Ordering Number Lead Free UH477L-G04-K Halogen Free UH477G-G04-K Package Packing SIP-4 Bulk PIN DESCRIPTION PIN NO. 1 2 3 4 PIN NAME VCC NO SO GND DESCRIPTION IC Power Supply Coil driver output is low state during the N magnetic field. Coil driver output is low state during the S magnetic field. IC Ground www.unisonic.com.tw Copyright © 2012 Unisonic Technologies Co., Ltd 1 of 6 QW-R109-028.a UH477 Preliminary LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 1 Voltage Regulator Hall Element Temperature Compensated Current Amplifier 2 Latch Circuit Hysteresis Control Pre-Driver Sensitivity Control Thermal Shutdown 3 4 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R109-028.a UH477 Preliminary LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING PARAMETER SYMBOL RATINGS UNIT 30 V Peak Current 800 mA Output Peak Sink Current Hold Current IOUT 600 mA Continuous Current 300 mA TA=25°C 600 mW Power Dissipation PD TA=70°C 450 mW Junction Temperature TJ +150 °C Operating Junction Temperature TJ 0 ~ +85 °C Storage Temperature TSTG -65 ~ +150 °C Note: 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. VCC Pin Voltage DC ELECTRICAL CHARACTERISTICS PARAMETER Supply Voltage Quiescent Supply Current SYMBOL VCC ICC VCE(SINK) VCE(DRIVE) Output Saturation Voltage VCC=30V, No use pin open VCC=14V, IC=200mA VCC=14V, IC=200mA MIN 3 TYP 25 0.55 12.5 MAX 30 30 0.8 14 UNIT V mA V V MAX 1.0 1.5 0.5 UNIT μs μs μs AC ELECTRICAL CHARACTERISTICS PARAMETER Rise Time Fall Time Switch Time Differential TEST CONDITIONS SYMBOL tR tF Δt TEST CONDITIONS RL=820Ω, CL=20pF RL=820Ω, CL=20pF RL=820Ω, CL=20pF MIN TYP 0.5 0.5 1.0 MAGNETIC CHARACTERITICS A Grade PARAMETER Operating Point Release Point SYMBOL BOP BRP MIN 10 -45 TYP B Grade PARAMETER Operating Point Release Point SYMBOL BOP BRP MIN TYP C Grade PARAMETER Operating Point Release Point SYMBOL BOP BRP MIN MAX 65 -65 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MAX 45 -10 -90 TYP MAX 90 UNIT Gauss UNIT Gauss UNIT Gauss 3 of 6 QW-R109-028.a UH477 Preliminary LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT UTC UH477 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R109-028.a UH477 Preliminary LINEAR INTEGRATED CIRCUIT APPLICATION CIRCUIT The Example of Typical Application Circuit A typical application circuit is shown as follows. The red, yellow, and black wires are the input points of the motor system: Red--the input of power supply; Yellow--the output of FG; Black--the ground signal. RC is an external pull-up resistance for the use of measuring FG signal. The value of RC can be calculated by the transistor saturation voltage (VON), sink current (IC), and off-level voltage (VC). V − VON RC = C IC For example: VC=+5V for TTL level; IC= 10mA at 0.2V saturation voltage; The safety value of RC=470Ω There is a reverse protection diode D1 in the circuit. As if the red and black wires reversely connect with the power source, the current flows through the ground via IC and coils L1 and L2 to power supply. Under such kind of circumstances the IC and coils are easy to be burned out. From that, this reverse protection diode is necessary in the design. Meanwhile, an extra voltage drop on the supply voltage should be taken into consideration, which is caused by the reverse protection diode. The capacitor C1 is designed to reduce the ripple noise during the transient of the output stages, and its value is determined by the coil impedance and characteristics. D1 R wire VCC C1 +VC NO RC Y wire L1 UH477 SO GND B wire UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R109-028.a UH477 Preliminary LINEAR INTEGRATED CIRCUIT FUNCTIONAL INFORMATION H-Bridge Transistor Output In the following figure, the diagram of H-bridge transistors is shown. The single-phase motor rotation is changed by a switching current of coil L1. When the magnetic pole is N pole, Q2, Q3, Q5 is shut off and Q1, Q4, Q6 is turn-on, the current flows through L1 from SO to NO. And when the magnetic pole is S pole, Q1, Q4, Q6 is turn-off and Q2, Q3 is turned on. The current flows through L1 from NO to SO. 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R109-028.a