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參數(shù)資料
| 型號(hào)： | 101-0654 |
| 廠商： | Rabbit Semiconductor |
| 文件頁(yè)數(shù)： | 79/110頁(yè) |
| 文件大小： | 0K |
| 描述： | INTERFACE OP6800 W/ETHERNET 512K |
| 標(biāo)準(zhǔn)包裝： | 10 |
| 系列： | SBC |
| 模塊/板類(lèi)型： | 單板計(jì)算機(jī)模塊 |
| 適用于相關(guān)產(chǎn)品： | OP6800 |
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MiniCom (OP6800)
The Demonstration Board has an onboard LM7805 linear regulator for the circuits on the
Demonstration Board only. Its major drawback is its inefficiency, which is directly propor-
tional to the voltage drop across it. The voltage drop creates heat and wastes power.
You may wish to use a switching power supply in your applications where better effi-
ciency is desirable. The LM2575 is an example of an easy-to-use switching voltage regu-
lator. This part greatly reduces the heat dissipation of the regulator. The drawback in using
a switching voltage regulator is its higher cost.
Figure C-3. Demonstration Board Power Supply
Capacitor C1 provides surge current protection for the voltage regulator, and allows the
external power supply to be located some distance away.
Be careful to limit the current draw in any prototype circuits you build on the prototyping
area of the Demonstration Board to avoid operating the linear regulator outside its recom-
mended limits. The LEDs and buzzer together can draw up to 70 mA, which still leaves
some current capacity for your own circuits (see Table C-1) if you plan to use them with
the LEDs and the buzzer.
If you need additional current from the linear regulator beyond that specified in Table C-1,
consider adding a heat sink to the linear regulator (remember to use silicone grease
between the tab and the heat sink), or use a lower voltage power supply.
LINEAR POWER SUPPLY
POWER
IN
J5
10 mF
7805
U1
+RAW
Vcc
C2
C1
10 mF
1
2
3
2
1
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| 101-0655 | 功能描述:開(kāi)發(fā)軟件 SNMP Module CD RoHS:否 制造商:Atollic Inc. 產(chǎn)品:Compilers/Debuggers 用于:ARM7, ARM9, Cortex-A, Cortex-M, Cortex-R Processors |
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