AN8850

UNISONIC TECHNOLOGIES CO., LTD AN8850 Preliminary CMOS IC MOTOR CONTROL CIRCUITS DESCRIPTION The UTC AN8850 is a electronic governor suitable for low-voltage and compact DC motors generally used in the tape recorder, etc. FEATURES * Wide range of operating voltage : VCC(opr) =1.8V ~ 12V * 2 package types * Fewer external parts * Speed control in steps with linear fine control DIP-8 ORDERING INFORMATION Ordering Number Lead Free Halogen Free AN8850L-D08-T AN8850G-D08-T xx: Output Voltage, refer to Marking Information. AN8850L-D08-T (1)Packing Type (2)Package Type (3)Lead Free (1) T: Tube (2) D08: DIP-8 (3) Halogen Free, L: Lead Free Package DIP-8 Packing Tube Note: www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-507.a AN8850 PIN CONFIGURATION VREF1 Preliminary CMOS IC 8 Phase Compensation VREF+ 2 7 Motor Pin VCC 3 6 GND Comparator Input 4 5 GND PIN DESCRIPTION PIN NO. 1 2 3 4 5 6 7 8 PIN NAME VREFVREF+ VCC Comparator Input GND GND Motor Pin Phase Compensation VREFVREF+ Power Supply Input of Comparator Ground Ground Output Pin Phase Compensation DESCRIPTION BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R502-507.a AN8850 Preliminary CMOS IC ABSOLUTE MAXIMUM RATING (Ta= 25°C) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 12 V Circuit Voltage Vn – 5, 6 (n = 1, 2, 3, 4) -0.5~7.5 V Circuit Voltage Vn – 5, 6 -0.5~1 V Supply Current ICC (Note 1) 2 A Circuit Current IOUT 2 A Power Dissipation PD 750 mW °C Operating Ambient Temperature TOPR -20~+75 °C Storage Temperature TSTG -40~+150 Notes: 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. 1. t ≤ 5µs ELECTRICAL CHARACTERISTICS (Ta= 25°C) PARAMETER Supply Current Reference Voltage Starting Voltage Saturation Voltage Voltage Characteristics 1 SYMBOL ICC Vref VCC(S) VSAT ΔVref / ΔVCC Vref ΔVa / ΔVCC Va TEST CONDITIONS MIN VCC=3V VCC=3V, V2-1>10kΩ 1.20 Supply voltage in which 30mA current flows to Ra VCC=1.8V， Ra=4.7Ω TYP 2 1.28 1.0 0.2 MAX 3 1.35 1.2 0.5 UNIT mA V V V VCC= 1.8V ~ 12V VCC= 1.8V ~ 12V IOUT =1~20mA Ta=-20~+60°C， VCC=3.0V -1.25 -1.2 0.1 0.1 1.25 1.2 %V %V Voltage Characteristics 2 Current Characteristics ΔVref Vref / ΔIOUT -0.2 0.01 0.2 %mA Current Characteristics ΔVref / ΔTa Vref 0.01 %°C Note: Operating Supply Voltage Range : VCC (opr) = 1.8V ~ 12V UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R502-507.a AN8850 Preliminary CMOS IC TYPICAL APPLICATION CIRCUIT Speed Control Circuit with 3V Core Motor Motor Ra=4Ω M 0.1µF 8 7 6 5 UTC AN8850 1 2 3 4 1000pF 9.1kΩ (2000ppm/°C) VR 1kB 510Ω 3Ω 1µF 10V + VCC 0.4Ω (3900ppm/°C) Motor Constants Ra : Internal resistor = 4Ω Ka : Electromotive force constant = 0.4mV/rpm KT : Torque constant = 30g · cm/A UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 5 QW-R502-507.a AN8850 Preliminary CMOS IC 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 5 of 5 QW-R502-507.a