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參數(shù)資料
| 型號： | TC828AECTRT |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 20 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封裝： | EIAJ, SC-74A, SOT-23A, 5 PIN |
| 文件頁數(shù)： | 5/9頁 |
| 文件大?。?/td> | 72K |
| 代理商： | TC828AECTRT |
5
TC828A
Switched Capacitor Voltage Converters
TC828A-1 5/1/00
2001 Microchip Technology Inc.
DS21588A
Diode Protection for Heavy Loads
When heavy loads require the OUT pin to sink large
currents being delivered by a positive source, diode protec-
tion may be needed. The OUT pin should not be allowed to
be pulled above ground. This is accomplished by connect-
ing a Schottky diode (1N5817) as shown in Figure 7.
Layout Considerations
As with any switching power supply circuit good layout
practice is recommended. Mount components as close
together as possible to minimize stray inductance and
capacitance. Also use a large ground plane to minimize
noise leakage into other circuitry.
Voltage Doubler/Inverter
Another common application of the TC828A is shown in
Figure 6. This circuit performs two functions in combination.
C1 and C2 form the standard inverter circuit described
above. C3 and C4 plus the two diodes form the voltage
doubler circuit. C1 and C3 are the pump capacitors and C2
and C4 are the reservoir capacitors. Because both sub-
circuits rely on the same switches if either output is loaded,
both will droop toward GND. Make sure that the total current
drawn from both the outputs does not total more
than 40 mA.
Figure 6. Combined Doubler and Inverter
Figure 7. High V– Load Current
C1
D1
D2
D1, D2 = 1N4148
5
4
1
2
3
C2
C4
C3
V
IN
+
V
OUT = VIN
–
V
OUT = (2VIN) –
(V
FD1) – (VFD2)
TC828A
GND
OUT
4
1
Figure 5. Paralleling TC828As to Reduce Output Resistance
C1
5
4
3
4
1
2
1
3
C2
V
OUT
V
OUT = VIN
R
OUT =
R
OUT
OF SINGLE DEVICE
V
IN
+
NUMBER OF DEVICES
–
TC828A
“1”
TC828A
“N”
. . .
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC828AECTTR | 功能描述:電荷泵 Switched Capacitor RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 輸出電壓:- 1.5 V to - 5.5 V, 3 V to 11 V 輸出電流:100 mA 電源電流:1 mA 最大工作溫度:+ 70 C 封裝 / 箱體:SOIC-8 Narrow 封裝:Tube |
| TC828FR | 制造商:Thomas & Betts 功能描述:CABLE TIES |
| TC-828-SC | 制造商:Thomas & Betts 功能描述: |
| TC828TB | 制造商:Thomas & Betts 功能描述:Cable Accessories Four Way Mounting Base Nylon Natural Bulk |
| TC828-TB | 制造商:Thomas & Betts 功能描述:Mount, Cable Tie; 0.39" x 0.875"; #8 screw; 0.19" tie W; Nylon 6.6 制造商:Thomas & Betts 功能描述:MOUNTING BASE, 0.19", NYLON 6.6, CABLE TIE 50LBS; Mount Fixing Type:Screw; Mount Material:Nylon 6.6; Mount Color:Natural; Accessory Type:Mounting Base; For Use With:Cable Ties Up to 50lbs ;RoHS Compliant: Yes 制造商:Thomas & Betts 功能描述:Cable Accessories Four Way Mounting Base Nylon Natural Bulk |
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