数据搜索系统,热门电子元器件搜索
  Chinese  ▼
ALLDATASHEETCN.COM

X  

TL7660IDGKR 数据表(PDF) 9 Page - Texas Instruments

Click here to check the latest version.
部件名 TL7660IDGKR
功能描述  CMOS VOLTAGE CONVERTER
Download  23 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

TL7660IDGKR 数据表(HTML) 9 Page - Texas Instruments

Back Button TL7660IDGKR Datasheet HTML 5Page - Texas Instruments TL7660IDGKR Datasheet HTML 6Page - Texas Instruments TL7660IDGKR Datasheet HTML 7Page - Texas Instruments TL7660IDGKR Datasheet HTML 8Page - Texas Instruments TL7660IDGKR Datasheet HTML 9Page - Texas Instruments TL7660IDGKR Datasheet HTML 10Page - Texas Instruments TL7660IDGKR Datasheet HTML 11Page - Texas Instruments TL7660IDGKR Datasheet HTML 12Page - Texas Instruments TL7660IDGKR Datasheet HTML 13Page - Texas Instruments Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 23 page
background image
www.ti.com
Typical Applications
Simple Negative Voltage Converter
1
2
3
4
8
7
6
5
+
TL7660
+
-
-
10 µF
V+
10 µF
V
= –V+
OUT
TL7660
CMOS VOLTAGE CONVERTER
SCAS794 – JUNE 2006
APPLICATION INFORMATION (continued)
The majority of applications will undoubtedly utilize the TL7660 for generation of negative supply voltages.
Figure 3 shows typical connections to provide a negative supply negative (GND) for supply voltages below
3.5 V.
Figure 3. Simple Negative-Voltage Converter
The output characteristics of the circuit in Figure 3 can be approximated by an ideal voltage source in series with
a resistance. The voltage source has a value of –VCC. The output impedance (RO) is a function of the ON
resistance of the internal MOS switches (shown in Figure 2), the switching frequency, the value of C1 and C2,
and the ESR (equivalent series resistance) of C1 and C2. A good first order approximation for RO is:
RO ≈ 2(RSW1 + RSW3 + ESRC1) + 2(RSW2 + RSW4 + ESRC1)
RO ≈ 2(RSW1 + RSW3 + ESRC1) + 1/fPUMPC1 + ESRC2
Where fPUMP = fOSC/2 , RSWX = MOSFET switch resistance.
Combining the four RSWX terms as RSW, we see that:
RO ≈ 2 (RSW) + 1/fPUMPC1 + 4 (ESRC1) + ESRC2
RSW, the total switch resistance, is a function of supply voltage and temperature (See the Output Source
Resistance graphs). Careful selection of C1 and C2 reduces the remaining terms, minimizing the output
impedance. High value capacitors reduce the 1/fPUMPC1 component, and low ESR capacitors lower the ESR
term. Increasing the oscillator frequency reduces the 1/fPUMPC1 term but may have the side effect of a net
increase in output impedance when C1 > 10 µF and there is no longer enough time to fully charge the capacitors
every cycle. In a typical application where fOSC = 10 kHz and C = C1 = C2 = 10 µF:
RO ≈ 2(23) + 1/(5 × 10
3)(10–5) + 4(ESR
C1) + ESRC2
RO ≈ 46 + 20 + 5 (ESRC)
Because the ESRs of the capacitors are reflected in the output impedance multiplied by a factor of 5, a high
value could potentially swamp out a low 1/fPUMPC1 term, rendering an increase in switching frequency or filter
capacitance ineffective. Typical electrolytic capacitors may have ESRs as high as 10
Ω.
9
Submit Documentation Feedback


类似零件编号 - TL7660IDGKR

制造商部件名数据表功能描述
logo
Texas Instruments
TL7660IDGKR TI-TL7660IDGKR Datasheet
335Kb / 19P
[Old version datasheet]   CMOS VOLTAGE CONVERTER
More results

类似说明 - TL7660IDGKR

制造商部件名数据表功能描述
logo
Intersil Corporation
ICL7662 INTERSIL-ICL7662_06 Datasheet
223Kb / 10P
   CMOS Voltage Converter
logo
Texas Instruments
TL7660 TI-TL7660 Datasheet
335Kb / 19P
[Old version datasheet]   CMOS VOLTAGE CONVERTER
logo
Renesas Technology Corp
ICL7662 RENESAS-ICL7662 Datasheet
533Kb / 11P
   CMOS Voltage Converter
logo
Silicon Supplies
SIS7660 SS-SIS7660 Datasheet
1Mb / 5P
   CMOS Voltage Converter
logo
Maxim Integrated Produc...
MAX660 MAXIM-MAX660 Datasheet
108Kb / 12P
   CMOS Monolithic Voltage Converter
Rev. 2; 9/96
logo
Impala Linear Corporati...
ILC6660 IMPALA-ILC6660 Datasheet
58Kb / 5P
   CMOS MONOLITHIC VOLTAGE CONVERTER
logo
Linear Technology
LTC1044A LINER-LTC1044A_15 Datasheet
221Kb / 14P
   12V CMOS Voltage Converter
LTC1044A LINER-LTC1044A Datasheet
275Kb / 12P
   12V CMOS Voltage Converter
LTC660 LINER-LTC660 Datasheet
262Kb / 12P
   100mA CMOS Voltage Converter
LTC660 LINER-LTC660_15 Datasheet
238Kb / 12P
   100mA CMOS Voltage Converter
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


数据表 下载

Go To PDF Page


链接网址




隐私政策
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ] 

关于 Alldatasheet   |   广告服务   |   联系我们   |   隐私政策   |   链接交换   |   制造商名单
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