M5480B7 STMicroelectronics, M5480B7 Datasheet - Page 6

• Manufacturer Part Number: M5480B7
• Description: IC LED DISPLAY DRIVER 28-PDIP
• Manufacturer: STMicroelectronics

Specifications of M5480B7

• Display Type: LED
• Configuration: 7 Segment
• Interface: Serial
• Digits Or Characters: 3.5 Digits
• Current - Supply: 7mA
• Voltage - Supply: 4.75 V ~ 13.2 V
• Operating Temperature: -25°C ~ 85°C
• Mounting Type: Through Hole
• Package / Case: 28-DIP (0.600", 15.24mm)
• Number Of Digits: 3.5
• Number Of Segments: 23
• Operating Supply Voltage: 13.2 V
• Maximum Supply Current: 7 mA
• Maximum Power Dissipation: 940 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

M5480
POWER DISSIPATION OF THE IC
The power dissipation of the IC can be limited us-
ing different configurations.
Figure 7.
In this application R must be chosen taking into ac-
count the worst operating conditions.
R is determined by the maximum number of seg-
ments activated.
The worst case condition for the device is when
roughly half of the maximum number of segments
are activated.
It must be checked that the total power dissipation
does not exceed the absolute maximum ratings of
the device.
In critical cases more resistors can be used in con-
junction with groups of segments.
In this case the current variation in the single resis-
tor is reduced and P
6/10
V
OUT
R
V
D
=
R
+V
V
----------------------------------------------------------------
C
C
I
D
–
tot
V
DMAX
N
limited.
MAX
L
–
D
V
OMIN
Figure 8.
In this configuration the drop on the serial connect-
ed diodes is quite stable if the diodes are properly
chosen.
The total power dissipation of the IC depends, in a
first approximation, only on the number of seg-
ments activated.
Figure 9.
In this configuration V
tal power dissipation of the IC depends only on the
number of segments activated.
+V
OUT
V
+V
C
OUT
C
+ V
+ V
D
D
is constant. The to-