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参数资料
| 型号： | TC7660SEPA |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 45 kHz SWITCHING FREQ-MAX, PDIP8 |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 6/11页 |
| 文件大小： | 95K |
| 代理商： | TC7660SEPA |
4
TC7660S
SUPER CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER
TC7660S-14 9/16/96
2001 Microchip Technology Inc.
DS21467A
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 (C1). Since this capacitor is connected to the
output for only 1/2 of the cycle, the equation is:
Paralleling Devices
Any number of TC7660S voltage converters may be
paralleled to reduce output resistance (Figure 4). The reser-
voir capacitor, C2, serves all devices, while each device
requires its own pump capacitor, C1. The resultant output
resistance would be approximately:
XC =
= 3.18
,
where f = 10kHz and C1 = 10F.
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 C1 must be connected to pin 2 of the
TC7660S and the + terminal of C2 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
10
F
+
V
+
10
F
+
VOUT*
NOTES:
*
C1
C2
2
πf C1
ROUT (of TC7660S)
n (number of devices)
ROUT =
相关PDF资料 |
PDF描述 |
|---|---|
| TC7660SCOAG | SWITCHED CAPACITOR REGULATOR, 45 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC7660SEOAG | SWITCHED CAPACITOR REGULATOR, 45 kHz SWITCHING FREQ-MAX, PDSO8 |
| TC7662AIJA | SWITCHED CAPACITOR CONVERTER, 12 kHz SWITCHING FREQ-MAX, CDIP8 |
| TC7662AMJA | SWITCHED CAPACITOR CONVERTER, 12 kHz SWITCHING FREQ-MAX, CDIP8 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7660SMJA | 功能描述:电荷泵 High Voltage RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
| TC7662A | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:CHARGE PUMP DC-TO-DC CONVERTER |
| TC7662A_02 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Charge Pump DC-to-DC Converter |
| TC7662A_13 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Charge Pump DC-to-DC Converter |
| TC7662ACPA | 功能描述:电荷泵 High Voltage RoHS:否 制造商:Maxim Integrated 功能:Inverting, Step Up 输出电压:- 1.5 V to - 5.5 V, 3 V to 11 V 输出电流:100 mA 电源电流:1 mA 最大工作温度:+ 70 C 封装 / 箱体:SOIC-8 Narrow 封装:Tube |
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