NTE NTE1844

NTE1844
Integrated Circuit
Motor Speed Regulator
Description:
The NTE1844 is a monolithic integrated circuit intended for speed regulation of DC motors in record
players, tape, and cassette recorders, conveniently packaged in a 4–Lead SIP type plastic package.
Features:
D High Output/Low Quiescent Currents
D Low Reference Voltage
D Excellent Stability versus Temperature, Parameters
D Excellent Characteristics even at Low Supply Voltages
Absolute Maximum Ratings: (TA = +25°C)
Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V
Circuit Current (t ≤ 5sec), IO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2A
Package Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2W
Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +75°C
Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +150°C
Recommended Operating Condition:
Supply Voltage Range, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5V to 16V
Electrical Characteristics: (TA = +25°C, VCC = 12V, Pulse Test PW ≤ 10ms, Duty Cycle ≤ 2%
unless otherwise specified)
Parameter
Symbol
Test Conditions
Min
Typ
Max
Unit
Reference Voltage
Vref
I4 = 10mA
1.10
1.27
1.40
V
Quiescent Current
Id
RM = 180Ω
0.5
0.8
1.2
mA
Reflection Coefficient
k
RM1 = 44Ω, RM2 = 33Ω
18
20
22
V4(sat)
VCC = 4.2V, RM = 4.4Ω
–
1.5
2.0
V
I4 = 100mA, VCC = 6.3V to 16V
–
0.4
–
%/V
Saturation Voltage
∆k
/∆VCC
k
Electrical Characteristics (Cont’d): (TA = +25°C, VCC = 12V, Pulse Test PW ≤ 10ms,
Duty Cycle ≤ 2% unless otherwise specified)
Parameter
Line Regulation
Load Regulation
Temperature Coefficient
Note 1. RM =
k
=
Symbol
Test Conditions
Min
Typ
Max
Unit
∆Vref
/∆VCC
Vref
I4 = 100mA, VCC = 6.3V to 16V
–
0.06
–
%/V
∆k
/∆IM
k
I4 = 30mA to 200mA
–
–0.02
–
%/m
A
∆Vref
/∆IM
Vref
I4 = 30mA to 200mA
–
–0.02
–
%/m
A
∆k
/∆TA
k
I4 = 100mA, TA = –20° to +75°C
–
0.01
–
%/°C
∆Vref
/∆TA
Vref
I4 = 100mA, TA = –20° to +75°C
–
0.01
–
%/°C
internal motor resistance
I4/I2 where:
I2 and I4 are currents flowing
from VCC thru external resistors
or internal motor resistance to
Pin2 (I2) and Pin4 (I4).
Pin Connection Diagram
(Front View)
.334 (8.5)
4
Motor
3
GND
2
RT
1
VCC
.110 (2.8)
.125 (3.2)
Dia
.472
(12.0) .570
Max (14.4)
Max
1
4
.413
(10.3)
Min
.078 (2.0)