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參數(shù)資料
| 型號： | TC7660SCOA |
| 廠商： | TelCom Semiconductor, Inc. |
| 英文描述： | SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER |
| 中文描述： | 超級電荷泵型DC - DC電壓轉(zhuǎn)換器 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大小： | 136K |
| 代理商： | TC7660SCOA |
4-72
TELCOM SEMICONDUCTOR, INC.
TC7660S
SUPER CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER
The output characteristics of the circuit in Figure 3 are
those of a nearly ideal voltage source in series with 70
.
Thus, for a load current of –10mA and a supply voltage of
+5V, the output voltage would be –4.3V.
The dynamic output impedance of the TC7660S is due,
primarily, to capacitive reactance of the charge transfer
capacitor (C
1
). Since this capacitor is connected to the
output for only 1/2 of the cycle, the equation is:
2
2
π
f
C
1
where f = 10kHz and C
1
= 10
μ
F.
Paralleling Devices
Any number of TC7660S voltage converters may be
paralleled to reduce output resistance (Figure 4). The reser-
voir capacitor, C
2
, serves all devices, while each device
requires its own pump capacitor, C
1
. The resultant output
resistance would be approximately:
X
C
= = 3.18
,
Figure 4. Paralleling Devices Lowers Output Impedance
Dos and Don'ts
Do not exceed maximum supply voltages.
Do not connect the LV terminal to GND for supply
voltages greater than 3.5V.
Do not short circuit the output to V
+
supply for voltages
above 5.5V for extended periods; however, transient
conditions including start-up are okay.
When using polarized capacitors in the inverting mode,
the + terminal of C
1
must be connected to pin 2 of the
TC7660S and the + terminal of C
2
must be connected
to GND.
Simple Negative Voltage Converter
Figure 3 shows typical connections to provide a nega-
tive supply where a positive supply is available. A similar
scheme may be employed for supply voltages anywhere in
the operating range of +1.5V to +12V, keeping in mind that
pin 6 (LV) is tied to the supply negative (GND) only for supply
voltages below 3.5V.
Figure 3. Simple Negative Converter
1
2
3
4
8
7
6
5
TC7660S
V+
1
2
3
4
8
7
6
5
TC7660S
C1
RL
C2
C1
"n"
"1"
+
1
2
3
4
8
7
6
5
TC7660S
10μF
+
V
+
10μF
+
VOUT
*
NOTES:
*
C1
C2
R
OUT
(of TC7660S)
n (number of devices)
R
OUT
=
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| TC7662AIJA | Circular Connector; No. of Contacts:32; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:18; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:18-32 RoHS Compliant: No |
| TC7662AIJA | CHARGE PUMP DC-TO-DC CONVERTER |
| TC7662A | CHARGE PUMP DC-TO-DC CONVERTER |
| TC7662ACPA | CHARGE PUMP DC-TO-DC CONVERTER |
| TC7662AEPA | CHARGE PUMP DC-TO-DC CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TC7660SCOA713 | 功能描述:電荷泵 High Voltage 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 |
| TC7660SCPA | 功能描述:電荷泵 High Voltage 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 |
| TC7660SEJA | 功能描述:電荷泵 High Voltage 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 |
| TC7660SEOA | 功能描述:電荷泵 High Voltage 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 |
| TC7660SEOA | 制造商:Microchip Technology Inc 功能描述:DC/DC Charge Pump Converter (DC-DC) IC |
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