PBL 3770A
Sensor resistor
The R
S
resistor should be of a non-
inductive type power resistor. A 0.5 ohm
resistor, tolerance
≤
1%, is a good
choice for 800 mA max motor current at
V
R
= 5V.
The peak motor current, i
m
, can be
calculated by using the formula:
i
m
= (V
R
• 0.080) / R
S
[A], at 100% level
External recirculation diodes
Recirculation diodes must be connected
across each motor terminal and the
supply voltage, V
MM
. The anodes shall be
connected to the motor terminals and
the cathodes to the V
MM
voltage. Ultra-
fast recovery diodes should be used for
maximum performance and reliability.
.5
0
0
50
100
150
P
D
(W)
3.0
2.5
2.0
1.5
1.0
P
D
(W)
V
MM
= 36 V
4.0
W
ith
St
av
W
3.0
PC
er
ith
av
St
(3
7
V8
tsi
B
he
a
.5
nk
°
C
V
er
7
5
°
7.
(2
)
)
/W
2.0
(4
0
°
C
/W
W
C/
V
MM
= 12 V
1.0
)
0
.50
1.0
1.5
I
M
(A)
T
Amb
(°C)
Figure 12. Typical power dissipation vs.
motor current.
33,5 m
m
Figure 13. Allowable power dissipation
vs. ambient temperature.
Ordering Information
Package
Part No.
18,5 m
m
DIP Tube
PLCC Tube
PLCC Tape & Reel
SO Tube
SO Tape & Reel
PBL 3770ANS
PBL 3770AQNS
PBL 3770AQNT
PBL 3770ASOS
PBL 3770ASOT
38,5 mm
11,6 mm
mm
38.0
mm
38.0
Figure 14. Heatsinks, Staver, type V7 and V8 by Columbia-Staver UK.
Information given in this data sheet is believed to be
accurate and reliable. However no responsibility is
assumed for the consequences of its use nor for any
infringement of patents or other rights of third parties
which may result from its use. No license is granted
by implication or otherwise under any patent or
patent rights of Ericsson Components AB. These
products are sold only according to Ericsson
Components' general conditions of sale, unless
otherwise confirmed in writing.
Thermal resistance [°C/W]
90
16-pin
DIP
80
70
60
50
Specifications subject to change
without notice.
1522-PBL 3770/6Uen. Rev E
© Ericsson Components AB 1999
20-pin
SO
40
30
5
10
15
20
25
30
35
PCB copper foil area
PLCC package
DIP package
[cm
2
]
28-pin
PLCC
Ericsson Components AB
SE-164 81 Kista-Stockholm, Sweden
Telephone: +46 8 757 50 00
8
Figure 15. Copper foil used as a heatsink.
ERICSSON [ ERICSSON ]
