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参数资料
| 型号： | TC1226EUART |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 45.5 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封装： | MSOP-8 |
| 文件页数： | 5/9页 |
| 文件大小： | 1189K |
| 代理商： | TC1226EUART |
5
TC1225
TC1226
TC1227
TC1225/6/7-1
3/24/00
Inverting Dual (–VIN, –2VIN)
Charge Pump Voltage Converters
2001 Microchip Technology Inc.
DS21369A
Dual Voltage Inverter
The most common application for the TC1225/1226/
1227 devices is the dual voltage inverter (Figure 2). This
application uses four external capacitors: C1, C2, COUT1,
and COUT2 (NOTE: a power supply bypass capacitor is
recommended). The outputs are equal to – VIN and –2VIN
plus any voltage drops due to loading. Refer to Tables 1a,
1b, 2a, and 2b for capacitor selection guidelines.
Figure 2. Dual Voltage Inverter Test Circuit
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.
TC1225 DEMO CARD
The TC1225 DEMO Card is a 2.0” x 2.0” card containing
both a TC1225 and two cascaded TCM828s that allow the
user to compare the operation of each approach for gener-
ating a –1X and –2X function. Each circuit is fully assembled
with the required external capacitors along with variable
load resistors that allow the user to vary the output load
current of each stage. For convenience, several test points
and jumpers are available for measuring various voltages
and currents on the demo board.
Figure 3 is a schematic of the TC1225 DEMO Card, and
Figure 4 shows the assembly drawing and artwork for the
board. Table 3 lists the voltages that are monitored by the
test points and Table 4 lists the currents that can be
measured using the jumpers.
Table 3. TC1225 DEMO Card Test Points
TEST POINT
VOLTAGE MEASUREMENT
TP1
VIN [+5V]
TP2
GROUND
TP3
GROUND
TP4
TCM828 U1 OUTPUT [-5V(1)]
TP5
TCM828 U2 OUTPUT [-10V(1)]
TP6
TC1225 STAGE 1 OUTPUT [-5V(2)]
TP7
TC1225 STAGE 2 OUTPUT [-10V(2)]
Table 4. TC1225 DEMO Card Jumpers
JUMPER
CURRENT MEASUREMNT
J1
DUAL TCM828 QUIESCENT CURRENT
J2
TC1225 QUIESCENT CURRENT
J3
TCM828 U1 [-5V(1)] LOAD CURRENT
J4
TCM828 U2 [-10V(1)] LOAD CURRENT
J5
TC1225 STAGE 1 [-5V(2)] LOAD CURRENT
J6
TC1225 STAGE 2 [-10V(2)] LOAD CURRENT
C1
C2
V
IN
C
IN
R
L1
V
OUT1
V
OUT2
R
L2
–V
IN
V
IN
C
OUT1
C
OUT2
–2V
IN
TC1225
TC1226
TC1227
C1–
C2–
2
1
7
6
8
4
5
3
C1+
C2+
GND
Device
CIN
C1
C2
COUT1
COUT2
TC1225
3.3
F 3.3F
1
F
3.3
F
1
F
TC1226
1
F
1
F 0.33F
1
F
0.33
F
TC1227
0.33
F 0.33F
0.1
F 0.33F
0.1
F
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TC1227 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters |
| TC1227EUA | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:Inverting Dual (-VIN, -2VIN) Charge Pump Voltage Converters |
| TC122A | 制造商:Thomas & Betts 功能描述:Fittings Connector 0.75inch Steel |
| TC122A-FA | 制造商:Thomas & Betts 功能描述:Fittings Connector 0.75inch Steel |
| TC122-JR-070RL | 制造商:Yageo Corporation 功能描述:RESISTOR ARRAY ARC321 0R 制造商:Yageo / Phycomp 功能描述:RESISTOR ARRAY, ARC321, 0R |
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