TDA7275A
MOTOR SPEED REGULATOR
.
.
.
.
.
.
.
EXCELLENT VERSATILITY IN USE
HIGH OUTPUT CURRENT (up to 1.5 A)
LOW QUIESCENT CURRENT
LOW REFERENCE VOLTAGE (1.32 V)
EXCELLENT PARAMETERS STABILITY VER-
SUS AMBIENT TEMPERATURE
START/STOP FUNCTION (TTL levels)
DUMP PROTECTION
MINIDIP
(4 + 4 )
DESCRIPTION
The TDA7275A is a linear integrated circuit in mini-
dip plastic package. It is intended for use as speed
regulator for DC motors of record players, tape and
cassette recorders.
The dump protectionmake it particularlysuitablefor
car radio applications.
ORDERING NUMBER :
TDA7275A
PIN CONNECTION
(top view)
May 1997
1/9
TDA7275A
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
V
S
V
S
I
M
T
op
P
tot
Supply Voltage
Peak Supply Voltage (for 50ms)
Maximum Output Current
Operating Temperature Range
Power Dissipation at T
amb
= 70
°
C
at T
pins
= 70
°
C
Parameter
Value
19
45
1.5
–30 to +85
1
4
Unit
V
V
A
°C
W
W
THERMAL DATA
Symbol
R
th j-amb
R
th j-pins
Parameter
Thermal Resistance Junction-ambient
Max.
Thermal Resistance Junction -pins
Value
80
20
Max.
Unit
°
C/W
°
C/W
2/7
TDA7275A
ELECTRICAL CHARACTERISTICS
(Refer to test circuit, V
S
= 12V, T
amb
= 25°C unless otherwise
specified, refer to test circuit)
Symbol
V
S
V
ref
I
q
+ I
d
I
d
I
ms
V
4
K = I
M
/I
T
∆K ⁄ ∆V
S
K
∆K ⁄ ∆I
M
K
∆
K
⁄ ∆
T
K
∆
V
ref
⁄ ∆
V
S
V
ref
∆V
ref
⁄ ∆I
M
V
ref
∆
V
ref
⁄ ∆
T
V
ref
V
2
I
2
V
2
I
2
Line Regulation
Load Regulation
Temperature Coefficient
Motor ”Stop” (Acc. Following
data or grounded)
Motor ”Stop”
Motor ”Run” (Acc. Following
data or open)
Motor ”Run”
V2 = 1.5V
V2 = 1V
Parameter
Supply Voltage Range
Reference Voltage
Total Quiescent Current
Quiescent Current
Starting Motor Current
Saturation Voltage
Reflection coefficient
I
M
= 0.1A
I
M
= 0.1mA
I
M
= 0.1mA
∆
V
ref
=
–50%
V
ref
I
M
= 0.5A
I
M
= 0.1A
I
M
= 0.1A
V
S
= 8 to 16V
I
M
= 25 to 200mA
I
M
= 0.1A
T
op
= –30 to +85°C
I
M
= 0.1A
V
S
= 8 to 16V
I
M
= 25 to 200mA
I
M
= 0.1A
T
op
= –30 to +85°C
18
1
1.7
20
0.5
–0.05
0.02
0.04
–0.01
0.02
1
–0.05
1.5
–0.1
2
22
Test Condition
Min.
8
1.05
1.22
2
1
Typ.
Max.
18
1.35
Unit
V
V
mA
mA
A
V
–
%/V
%/mA
%/
°
C
%/V
%/mA
%/
°
C
V
mA
V
mA
3/7
TDA7275A
Figure 1 :
Test Circuit.
Figure 2 :
Application Circuit.
– R
Ttyp.
= K
typ.
R
Mtyp.
if R
T
> K
min
R
Mmin
instability may accur.
– A diode across the motor could be necessary with certain kind of motor.
4/7
TDA7275A
Figure 3
: Quiescent Current vs.
Supply voltage.
Figure 4 :
Speed Variation vs.
Supply Voltage.
Figure 5 :
Speed Variation vs.
Torque (V
S
= 12 V).
5/7
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