Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

TC7660SCPA Datasheet(PDF) 11 Page - Microchip Technology

Part # TC7660SCPA
Description  SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
Download  24 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC7660SCPA Datasheet(HTML) 11 Page - Microchip Technology

Back Button TC7660SCPA Datasheet HTML 7Page - Microchip Technology TC7660SCPA Datasheet HTML 8Page - Microchip Technology TC7660SCPA Datasheet HTML 9Page - Microchip Technology TC7660SCPA Datasheet HTML 10Page - Microchip Technology TC7660SCPA Datasheet HTML 11Page - Microchip Technology TC7660SCPA Datasheet HTML 12Page - Microchip Technology TC7660SCPA Datasheet HTML 13Page - Microchip Technology TC7660SCPA Datasheet HTML 14Page - Microchip Technology TC7660SCPA Datasheet HTML 15Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 11 / 24 page
background image
 2001-2015 Microchip Technology Inc.
DS20001467C-page 11
TC7660S
5.6
Combined Negative Voltage
Conversion and Positive Supply
Multiplication
Figure 5-7 combines the functions shown in Figure 5-3
and Figure 5-6 to provide negative voltage conversion
and positive voltage multiplication simultaneously. For
example, this approach would be suitable for generat-
ing +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 multiplied pos-
itive 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.
FIGURE 5-7:
Combined Negative
Converter and Positive Multiplier.
5.7
Efficient Positive Voltage
Multiplication/Conversion
Since the switches that allow the charge pumping
operation are bidirectional, the charge transfer can be
performed
backwards
as
easily
as
forwards.
Figure 5-8 shows a TC7660S transforming -5V to +5V
(or +5V to +10V, etc.). The only problem is that the
internal clock and switch-drive section will not operate
until some positive voltage has been generated. An ini-
tial inefficient pump, as shown in Figure 5-7, could be
used to start this circuit up, after which it will bypass the
other (D1 and D2 in Figure 5-7 would never turn on), or
else the diode and resistor shown dotted in Figure 5-8
can be used to “force” the internal regulator on.
FIGURE 5-8:
Positive Voltage
Conversion.
5.8
Voltage Splitting
The same bidirectional characteristics used in
Figure 5-8 can also be used to split a higher supply in
half, as shown in Figure 5-9. The combined load will be
evenly shared between the two sides. Once again, 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 5-3, +15V can be converted (via +7.5V and -7.5V)
to a nominal -15V, though with rather high series
resistance (~250Ω).
FIGURE 5-9:
Splitting a Supply in Half.
5.9
Negative Voltage Generation for
Display ADCs
The TC7106 is designed to work from a 9V battery.
With a fixed power supply system, the TC7106 will
perform conversions with input signal referenced to
power supply ground.
5.10
Negative Supply Generation for
4½ Digit Data Acquisition System
The TC7135 is a 4½ digit ADC operating from ±5V
supplies. The TC7660S provides an inexpensive -5V
source. (See AN16 and AN17 for TC7135 interface
details and software routines.)
+
C1
D1
+
+
C3
C4
C2
D2
+
VOUT =
1
2
3
4
8
7
6
5
TC7660S
V+
(2 V+) - (2 VF)
VOUT
= -V+
VOUT = -V
-
+
1M
V- input
+
1
2
3
4
8
7
6
5
TC7660S
10 µF
10 µF
C1
+
R
L1
R
L2
V
OUT
=
V
+
–V
2
50
μF
100 k
Ω
50
μF
V
+
V
50
μF
+
1 M
Ω
1
2
8
7
TC7660S
3
4
6
5
+


Similar Part No. - TC7660SCPA

ManufacturerPart #DatasheetDescription
logo
TelCom Semiconductor, I...
TC7660SCPA TELCOM-TC7660SCPA Datasheet
136Kb / 8P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
logo
Microchip Technology
TC7660SCPA MICROCHIP-TC7660SCPA Datasheet
95Kb / 11P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
2001
TC7660SCPA MICROCHIP-TC7660SCPA Datasheet
98Kb / 11P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
01/09/01
More results

Similar Description - TC7660SCPA

ManufacturerPart #DatasheetDescription
logo
Microchip Technology
TC7660S MICROCHIP-TC7660S Datasheet
95Kb / 11P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
2001
logo
TelCom Semiconductor, I...
TC7660S TELCOM-TC7660S Datasheet
136Kb / 8P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
logo
Microchip Technology
TC7660SEOA713 MICROCHIP-TC7660SEOA713 Datasheet
98Kb / 11P
   SUPER CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
01/09/01
TC7660 MICROCHIP-TC7660 Datasheet
91Kb / 12P
   CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
2001
logo
ON Semiconductor
MC7660 ONSEMI-MC7660 Datasheet
191Kb / 12P
   Charge Pump DC-to-DC Voltage Converter
February, 2000 ??Rev. 2
logo
Microchip Technology
TC1044S MICROCHIP-TC1044S Datasheet
92Kb / 11P
   Charge Pump DC-TO-DC Voltage Converter
2001
logo
TelCom Semiconductor, I...
TC1044S TELCOM-TC1044S Datasheet
141Kb / 8P
   CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
TC7662B TELCOM-TC7662B Datasheet
133Kb / 9P
   CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER
logo
Microchip Technology
TC7660 MICROCHIP-TC7660_16 Datasheet
1Mb / 20P
   Charge Pump DC-to-DC Voltage Converter
11/29/11
TC7660 MICROCHIP-TC7660_02 Datasheet
386Kb / 18P
   Charge Pump DC-to-DC Voltage Converter
2002
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com