Datasheet

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
Note:
Ordering Number
Lead Free
Halogen Free
AN8850L-D08-T
AN8850G-D08-T
xx: Output Voltage, refer to Marking Information.
AN8850L-D08-T
Package
Packing
DIP-8
Tube
(1)Packing Type
(1) T: Tube
(2)Package Type
(2) D08: DIP-8
(3)Lead Free
(3) Halogen Free, L: Lead Free
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Copyright © 2011 Unisonic Technologies Co., Ltd
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AN8850
„
„
CMOS IC
PIN CONFIGURATION
VREF-
1
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
„
Preliminary
PIN NAME
VREFVREF+
VCC
Comparator Input
GND
GND
Motor Pin
Phase Compensation
DESCRIPTION
VREFVREF+
Power Supply
Input of Comparator
Ground
Ground
Output Pin
Phase Compensation
BLOCK DIAGRAM
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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
Voltage Characteristics 2
Current Characteristics
Current Characteristics
SYMBOL
ICC
Vref
VCC(S)
VSAT
ΔVref
/ ΔVCC
Vref
ΔVa
/ ΔVCC
Va
ΔVref
Vref
/ ΔIOUT
ΔVref
/ ΔTa
Vref
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
MAX
3
1.35
UNIT
mA
V
1.0
1.2
V
0.2
0.5
V
VCC= 1.8V ~ 12V
-1.25
0.1
1.25
%V
VCC= 1.8V ~ 12V
-1.2
0.1
1.2
%V
IOUT =1~20mA
-0.2
0.01
0.2
%mA
Ta=-20~+60°C, VCC=3.0V
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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AN8850
„
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
Speed Control Circuit with 3V Core Motor
Motor
Ra=4Ω
8
M
7
6
5
UTC
AN8850
0.1µF
1
2
3
4
1000pF
9.1kΩ
(2000ppm/°C)
1µF
10V
VR
1kB
510Ω
3Ω
+
0.4Ω
(3900ppm/°C)
VCC
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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