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
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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
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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
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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
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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
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