Page 1
.
EXCELLENT VERSATILITY IN USE
.
HIGH OUTPUT CURRENT (up to 1.5 A)
.
LOW QUIE S CE N T CUR RE NT
.
LOW REFERENCE VOLTAGE (1.32 V)
.
EXCELLENT PARA METERS STABILITY VERSUS AMBIENT TEMPERATURE
.
START/STOP FUNCTION (TTL levels)
.
DUMP PROTECTION
TDA7275A
MOTOR SPEED REGULATOR
DESCRIPTION
The TDA72 75A is a lin ear integrated c ir cu it in minidip plastic pac ka ge. It is int end ed fo r use as speed
regulator fo r DC moto rs of reco rd play ers, tape and
cassett e re corders.
The dump prote ction make it part icularly sui table for
car radio applications.
PIN CONNECTION (top view)
MINIDIP
(4 + 4 )
ORDERING NUMBE R :
TDA7275A
May 1997
1/9
Page 2
TDA7275A
SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Supply Voltage 19 V
V
S
V
Peak Supply Voltage (for 50ms) 45 V
S
Maximum Output Current 1.5 A
I
M
T
Operating Temperature Range –30 to +85
op
Power Dissipation at T
P
tot
at T
amb
pins
= 70°C
= 70°C
1
4
THERMAL DATA
Symbol Parameter Value Unit
R
th j-amb
R
th j-pins
Thermal Resistance Junction-ambient
Max.
Thermal Resistance Junction -pins Max.
80
20
C/W
°
C/W
°
C
°
W
W
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Page 3
TDA7275A
ELECTRICAL CHARACTERISTICS (Refer to test circuit, V
= 12V, T
S
= 25°C unless otherwise
amb
specified, refer to test circuit)
Symbol Parame ter Test Conditi on Min. Typ. Max. Unit
V
V
I
+ I
q
I
I
ms
V
K = I
K
⁄ ∆
∆
K
K
⁄ ∆
∆
K
K
∆
K
V
∆
ref
V
V
∆
ref
V
V
∆
ref
V
V
Supply Voltage Range 8 18 V
S
Reference Voltage IM = 0.1A 1.05 1.22 1.35 V
ref
Total Quiescent Current IM = 0.1mA 2 mA
d
Quiescent Current IM = 0.1mA 1 mA
d
Starting Motor Current
Saturation Voltage IM = 0.5A 1.7 2 V
4
Reflection coefficient IM = 0.1A 18 20 22 –
M/IT
V
S
I
M
T
⁄ ∆
Line Regulation IM = 0.1A
V
⁄ ∆
S
ref
Load Regulation IM = 25 to 200mA –0.01 %/mA
I
⁄ ∆
M
ref
Temperature Coefficient IM = 0.1A
T
⁄ ∆
ref
Motor "Stop" (Acc. Following
2
V
∆
ref
= –50%
V
ref
IM = 0.1A
V
= 8 to 16V
S
IM = 25 to 200mA –0.05 %/mA
IM = 0.1A
T
= –30 to +85°C
op
V
= 8 to 16V
S
T
= –30 to +85°C
op
1A
0.5 %/V
0.02 %/°C
0.04 %/V
0.02 %/°C
1V
data or grounded)
I
V
Motor "Stop" V2 = 1V –0.05 mA
2
Motor "Run" (Acc. Following
2
data or open)
I
Motor "Run" V2 = 1.5V –0.1 mA
2
1.5 V
3/7
Page 4
TDA7275A
Figure 1 : Test Circuit.
Figure 2 : Application Circuit.
– R
Ttyp.
= K
typ. RMtyp.
if RT > K
min RMmin
instability m ay ac cu r.
– A diode acro ss t he m otor c ould be necessary with cert ain ki nd of m otor .
4/7
Page 5
TDA7275A
Figure 3 : Quiescent Current vs.
Supply vo ltage.
Figure 5 : Speed Variation vs.
Torque (V
= 12 V) .
S
Figure 4 : Speed Variation vs.
Supply Voltage.
5/7
Page 6
TDA7275A
MINIDIP PACKAGE MECHANICAL DATA
DIM.
MIN. TYP. MAX. MIN. TYP. MAX.
A 3.3 0.130
a1 0.7 0.028
B 1.39 1.65 0.055 0.065
B1 0.91 1.04 0.036 0.041
b 0.5 0.020
b1 0.38 0.5 0.015 0.020
D 9.8 0.386
E 8.8 0.346
e 2.54 0.100
e3 7.62 0.300
e4 7.62 0.300
F 7.1 0.280
I 4.8 0.189
L 3.3 0.130
Z 0.44 1.6 0.017 0.063
mm inch
6/7
Page 7
TDA7275A
Information furnis hed is believed to be acc urate and reliable. However, SGS- THOMSON Microelectronics assumes no responsibilit y for
the consequences of us e of such information nor for any infri ngement of patents or other rights of third parties which may result from its
use. No li cense is granted by i mplication or ot herwise un der any patent or p atent ri ghts o f SGS-THOM SON Microel ectr onics. Spec ifi cat io n
mentioned in this publ ication are subject to change without notic e. This publication s upersedes and replaces all information previously
supplied. SG S-THOMSON Mi croelectronic s products a re not author ized for us e as crit ical component s in life support dev ices or s ystems
without express wr itten a pproval of S GS-THOMSON M icroel ectronic s.
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The Netherlands - S ingapore - Spain - Swe den - Switz erland - Ta iwan - Thai land - United Kingdom - U.S.A.
© 1997 SGS -THOMS ON Micr oelect ronics – P rinted in I taly – All Ri ghts R eserved
SGS-THOMSON Microelec tronics GROUP OF COMPANIES
7/7
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