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参数资料
| 型号： | TCM828ECT713 |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 15.6 kHz SWITCHING FREQ-MAX, PDSO5 |
| 封装： | PLASTIC, SOT-23, 5 PIN |
| 文件页数： | 7/26页 |
| 文件大小： | 359K |
| 代理商： | TCM828ECT713 |
2010 Microchip Technology Inc.
DS21488B-page 15
TCM828/TCM829
5.0.7
PARALLELING DEVICES
To reduce the value of ROUT, multiple TCM828/
TCM829 devices can be connected in parallel
(Figure 5-5). The output resistance will be reduced by
a factor of N, where N is the number of TCM828/
TCM829 device. Each device will require it’s own pump
capacitor (C1), but all devices may share one reservoir
capacitor
(C2).
However,
to
preserve
ripple
performance, the value of C2 should be scaled
according to the number of paralleled TCM828/
TCM829 devices.
FIGURE 5-5:
Paralleling TCM828 or
TCM829 Devices to Reduce Output Resistance.
5.0.8
VOLTAGE DOUBLER/INVERTER
Another common application of the TCM828/TCM829
devices is shown in Figure 5-6. 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, while C2 and C4 are
the reservoir capacitors. Because both sub-circuits rely
on the same switches, if either output is loaded, both
will drop toward GND. Make sure that the total current
drawn from both the outputs does not total more than
40 mA.
FIGURE 5-6:
Combined Doubler and
Inverter.
5.0.9
DIODE PROTECTION FOR HEAVY
LOADS
When heavy loads require the OUT pin to sink large
currents, being delivered by a positive source, diode
protection may be needed. The OUT pin should not be
allowed
to
be
pulled
above
ground.
This
is
accomplished
by
connecting
a
Schottky
diode
(1N5817) as shown in Figure 5-7.
FIGURE 5-7:
High V– Load Current.
5.0.10
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.
C1
5
4
3
4
1
2
1
3
C2
V+IN
VOUT
VOUT =V
-
IN
"1"
"n"
. . .
TCM828/
TCM829
TCM828/
TCM829
ROUT =
VOUT OF SINGLE DEVICE
NUMBER OF DEVICES
C1
D1
D2
D1, D2 = 1N4148
5
4
1
2
3
C2
C4
C3
V+IN
VOUT =V
-
IN
VOUT =(2VIN)-
TCM828/
TCM829
(VFD1)- (VFD2)
GND
OUT
4
1
TCM828/
TCM829
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TCM828VT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM828VT713 | 制造商:Microchip Technology Inc 功能描述: |
| TCM829 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM829ECT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Switched Capacitor Voltage Converters |
| TCM829ECT713 | 功能描述:电荷泵 Switched CAP 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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