Motor Speed Controller
Description
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MOTOR SPEED CONTROL CIRCUIT
GENERAL DESCRIPTION
The D6650 is a monolithic integrated circuit designed for the tape recorder.
D6650
FEATURES z z z
Wide operating supply voltage : Vcc=1.
8V~7 V Few external components Easy Speed control mo de
Outline Drawing
BLOCK DIAGRAM
COMP.
INPUT 4 VREF- VREF+ 1 2 Vcc 3
VREFVREF+
PINNING
1K + _ 10K 7 MOTOR 8 PHASE
Reference Voltage
1 2 D6650 3 4
5 6 7 8
GND GND MOTOR PHASE
Start Circuit
Vcc COMP.
INPUT
5 GND
6 GND
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MAXIMUM RATINGS
Characteristics Supply Voltage Terminal Vo ltage Terminal 8 Vo ltage Supply Current Terminal 7 Current Power Diss ipation Operating Te mp erature Range Storage Temp erature Range Symbol Vcc Vn(n=1,2,3,4) V8 Icc I7 PD Topr Tstg
D6650
Value 7.
5 -0.
5~7.
5 -0.
5~1 1000 1 0 00 750 -20~70 -40~150
Unit V V V mA mA mW °C °C
ELECTRICAL CHARACTERISTICS ( Unless otherwise specified Vcc=6V,Ta mb=25 ° C,f=1kHz)
Characteristic Quiescent Circuit Current Reference Vo ltage Start Voltage Saturation Voltage Reference Vo ltage Characteristics Output Voltage Characteristics Reference Voltage Current Characteristics Reference Vo ltage Te mperature Characteristics Symbol Icc VREF Vcc(s) Vsat Test Condition Vcc=3V Vcc=3V, R2-1 > 1 0k Ω 30mA current flow to Ra Vcc=1.
8V, Ra=4.
7 Ω Vcc=1.
8V~7.
0V Vcc=1.
8V~7 .
0V I 7 =1 mA~20mA Ta=-20~60 ° C, Vcc=3.
0V Test Min.
Typ.
Max.
Circuit 1 4 2 2 1 3 4 -1.
25 -1.
2 -0.
2 2 3 Unit mA V V V %/V %/V
1.
20 1.
28 1.
35 1.
0 0.
2 0.
1 0.
1 0.
01 1.
2 0.
5 1.
25 1.
2
0.
2 %/mA
4
0.
01
%/ ° C
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TEST CIRCUIT
V
D6650
8 0.
1uF
7
6
5
Ra 0.
1uF
8 4.
7
7
6
5
D6650
1 10K 1.
0uF A Vcc 2 3 4
D6650
1 9.
1K 2 0.
47 1K 1.
0uF 3 4
Vcc
Fig.
1
Fig.
2
8 0.
1uF Va Ra 4.
7
7
6
5 0.
1uF
8
7
6
5
D6650
1 9.
1K 2 10 1K 1.
0uF 3 4 A
D6650
1 9.
1K 2 10 1K 1.
0uF 3 4
Vcc
V
Vcc
Fig.
3...
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