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参数资料
| 型号： | TC7660HCOAG |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR REGULATOR, 120 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | SOIC-8 |
| 文件页数： | 5/8页 |
| 文件大小： | 76K |
| 代理商： | TC7660HCOAG |
5
HIGH FREQUENCY 7660 DC-TO-DC
VOLTAGE CONVERTER
TC7660H
TC7660H-2 10/1/96
2001 Microchip Technology Inc.
DS21466A
Figure 5. Paralleling Devices Lowers Output Impedance
1
2
3
4
8
7
6
5
TC7660H
V
+
1
2
3
4
8
7
6
5
TC7660H
C1
RL
C2
C1
"n"
"1"
+
RL
1
2
3
4
8
7
6
5
TC7660H
+
V +
+
CMOS
GATE
1.0
F
VOUT
1.0
F
1 k
V +
Figure 6. External Clocking
Figure 7. Positive Voltage Multiplier
Positive Voltage Multiplication
The TC7660H may be employed to achieve positive
voltage multiplication using the circuit shown in Figure 7. In
this application, the pump inverter switches of the TC7660H
are used to charge C1 to a voltage level of V+ – VF (where V+
is the supply voltage and VF is the forward voltage drop of
diode D1). On the transfer cycle, the voltage on C1 plus the
supply voltage (V+) is applied through diode D2 to capacitor
C2. The voltage thus created on C2 becomes (2 V+) – (2 VF),
or twice the supply voltage minus the combined forward
voltage drops of diodes D1 and D2.
The source impedance of the output (VOUT) will depend
on the output current, but for V+ = 5V and an output current
of 10mA, it will be approximately 60
.
Combined Negative Voltage Conversion
and Positive Supply Multiplication
Figure 8 combines the functions shown in Figures 3 and
8 to provide negative voltage conversion and positive volt-
age multiplication simultaneously. This approach would be,
for example, suitable for generating +9V and –5V from an
existing +5V supply. In this instance, capacitors C1 and C3
perform the pump and reservoir functions, respectively, for
the generation of the negative voltage, while capacitors C2
and C4 are pump and reservoir, respectively, for the multi-
plied positive voltage. There is a penalty in this configuration
which combines both functions, however, in that the source
impedances of the generated supplies will be somewhat
higher due to the finite impedance of the common charge
pump driver at pin 2 of the device.
1
2
3
4
8
7
6
5
+
V +
VOUT =
(2 V +) – (2 VF)
C1
D1
+
C3
C4
VOUT =
– (V+– VF)
C2
TC7660H
D2
+
Figure 8. Combined Negative Converter and Positive Multiplier
1
2
3
4
8
7
6
5
V+
VOUT =
(2 V+) – (2 VF)
+
C2
D1
D2
+
C1
TC7660H
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC7660HCPA | 功能描述:电荷泵 High Frequency 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 |
| TC7660HCPA | 制造商:TELCOM SEMICONDUCTOR 功能描述:DC/DC VOLT CONVERTER 7660 DIP8 |
| TC7660HEOA | 功能描述:电荷泵 High Frequency 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 |
| TC7660HEOA713 | 功能描述:电荷泵 High Frequency 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 |
| TC7660HEPA | 功能描述:电荷泵 High Frequency 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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