參數(shù)資料
型號(hào)： M5482B7
廠商： 意法半導(dǎo)體
英文描述： Capacitors
中文描述： LED顯示驅(qū)動(dòng)器
文件頁數(shù)： 5/6頁
文件大?。?/td> 97K
代理商： M5482B7
POWER DISSIPATION OF THE IC
The power dissipation of the IC can be limited using
different configurations.
V
D
VOUT
R
I
D
+V
C
5
a)
In this application R must be chosen taking into
account the worst operating conditions.
R is determined by the maximum number of seg-
ments activated.
R
=
V
C
V
D
MAX
V
O MIN
N
MAX
I
D
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
conjunction with groups of segments. In this case
the current variation in the single resistor is reduced
and P
tot
limited.
In this configuration the drop on the serial con-
nected diodes is quite stable if the diodes are
properly chosen.
The total power dissipation of the IC is, in first
approximation, depending only on the number of
segments activated.
In this configuration V
OUT
+ V
D
is constant. The total
power dissipation of the IC depends only on the
number of segments activated.
+V
C
b)
5
+V
C
V
OUT
+V
D
5
c)
M5482
5/6
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M5484LITEKIT 功能描述:開發(fā)板和工具包 - COLDFIRE LOW COST KIT FOR MCF548X RoHS:否 制造商:Freescale Semiconductor 產(chǎn)品:Development Kits 工具用于評(píng)估:MCF53017 核心:ColdFire V3 接口類型:Ethernet, UART, USB 工作電源電壓:12 V
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