參數(shù)資料
型號： TC7662BCOA
廠商： Microchip Technology Inc.
英文描述： CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
中文描述： 電荷泵型DC - DC電壓轉(zhuǎn)換器
文件頁數(shù)： 6/9頁
文件大小： 133K
代理商： TC7662BCOA
4-88
TELCOM SEMICONDUCTOR, INC.
TC7662B
CHARGE PUMP DC-TO-DC
VOLTAGE CONVERTER
1
2
3
4
8
7
6
5
+
V+
VOUT
C1
COSC
+
C2
TC7662B
Figure 8. Lowering Oscillator Frequency
Positive Voltage Doubling
The TC7662B may be employed to achieve positive
voltage doubling using the circuit shown in Figure 9. In this
application, the pump inverter switches of the TC7662B are
used to charge C
1
to a voltage level of V
+
– V
F
(where V
+
is
the supply voltage and V
F
is the forward voltage on C
1
plus
the supply voltage (V
+
) applied through diode D
2
to capacitor
C
2
). The voltage thus created on C
2
becomes (2 V
+
) – (2 V
F
),
or twice the supply voltage minus the combined forward
voltage drops of diodes D
1
and D
2
.
The source impedance of the output (V
OUT
) will depend
on the output current, but for V
+
= 5V and an output current
of 10 mA, it will be approximately 60
.
Combined Negative Voltage Conversion
and Positive Supply Multiplication
Figure 10 combines the functions shown in Figures 3
and 9 to provide negative voltage conversion and positive
voltage doubling simultaneously. This approach would be,
for example, suitable for generating +9V and –5V from an
existing +5V supply. In this instance, capacitors C
1
and C
3
perform the pump and reservoir functions, respectively, for
the generation of the negative voltage, while capacitors C
2
and C
4
are pump and reservoir, respectively, for the doubled
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
TC7662B
D2
+
Figure 10. Combined Negative Converter and Positive Doubler
Figure 9. Positive Voltage Multiplier
Voltage Splitting
The bidirectional characteristics can also be used to
split a higher supply in half, as shown in Figure 11. The
combined load will be evenly shared between the two sides
and a high value resistor to the LV pin ensures start-up.
Because the switches share the load in parallel, the output
impedance is much lower than in the standard circuits, and
higher currents can be drawn from the device. By using this
circuit, and then the circuit of Figure 6, +15V can be
converted (via +7.5V and –7.5V) to a nominal –15V, though
with rather high series resistance (~250
).
1
2
3
4
8
7
6
5
V+
VOUT =
(2 V+) – (2 VF)
+
C2
D1
D2
+
C1
TC7662B
+
-
RL1
RL2
VOUT =
V+–V–
2
50
μF
50
μF
V+
V–
50 μF
+
-
1
2
8
7
TC7662B
3
4
6
5
+
-
Figure 11. Splitting a Supply in Half
相關PDF資料
PDF描述
TC7662B CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
TC7662BCPA CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
TC7662BEPA CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
TC7662BEOA CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
TC7662BCPA CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
相關代理商/技術參數(shù)
參數(shù)描述
TC7662BCOA 制造商:Microchip Technology Inc 功能描述:DC/DC CONVERTER SMD 7662 SOIC8
TC7662BCOA713 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
TC7662BCPA 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
TC7662BCPA 制造商:Microchip Technology Inc 功能描述:DC/DC Charge Pump Converter (DC-DC) IC
TC7662BEOA 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
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*