Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

AAT3171 Datenblatt(PDF) 12 Page - Advanced Analogic Technologies

Teilenummer AAT3171
Bauteilbeschribung  High Current, High Efficiency Charge Pump with Auto-Timer
Download  19 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  ANALOGICTECH [Advanced Analogic Technologies]
Direct Link  http://www.analogictech.com
Logo ANALOGICTECH - Advanced Analogic Technologies

AAT3171 Datenblatt(HTML) 12 Page - Advanced Analogic Technologies

Back Button AAT3171 Datasheet HTML 8Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 9Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 10Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 11Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 12Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 13Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 14Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 15Page - Advanced Analogic Technologies AAT3171 Datasheet HTML 16Page - Advanced Analogic Technologies Next Button
Zoom Inzoom in Zoom Outzoom out
 12 / 19 page
background image
AAT3171
High Current, High Efficiency
Charge Pump with Auto-Timer
12
3171.2007.03.1.1
For examples of standard 1% values where the
LED flash current level is targeted for 700mA, see
Table 3.
Table 3: Open-Drain I/O Example
Resistor Values.
If the I/O port must be configured as an open-drain
PMOS type output, the appropriate equations can
be generated from these same concepts. As done
in the previous example, the necessary values can
then be calculated.
As a reference, the equations applicable to the
PMOS case are:
The value to use for VIO must come from the I/O
supply voltage used in the system. 0.7V is the typ-
ical value of the VRSET parameter found in the
Electrical Characteristics.
For a push-pull I/O port output configuration, first
calculate the overall RSET value needed for the
desired flash level LED current:
Next, choose a reasonable value for R1. A value
that is slightly larger than RSET, calculated from
above, is appropriate. Calculate R2 and then calcu-
late the torch mode current level that results:
Once again, the current and resistance values used
in the equations come from the conditions placed on
the IDX parameter of the Electrical Characteristics
table. 0.7V is the typical value for the VRSET param-
eter. The value to use for VIO must come from the
I/O supply voltage used in the system.
Example standard 1% values are provided in Table 4.
Table 4: Push-Pull I/O Example
Resistor Values.
In all of the approaches mentioned, the open-drain
NMOS or PMOS type configurations offer the most
flexibility for current level selection.
When configured as an output, if the I/O port is only
push-pull type, then the equivalent open-drain
NMOS can also be realized. To realize this, acti-
vate the port as output only when driving the line
low. Otherwise, to release the line, set the port to
be tri-stated.
Device Power Efficiency
The AAT3171 power conversion efficiency
depends on the charge pump mode. By definition,
device efficiency is expressed as the output power
delivered to the LED divided by the total input
power consumed.
η =
POUT
PIN
R1
R2
ILED
ILED
(k
Ω
Ω)(kΩ
Ω)
Torch (mA)
Flash (mA)
169
1000
95
776
165
1000
111
792
162
1000
124
805
160
1000
132
813
ILED (torch) = 600mA · 187kΩ ·
-
R2 - R1
R1 · R2
VIO
0.7V · R2
RSET · R1
R1 - RSET
R2 =
600mA · 187kΩ
ILED (flash)
RSET =
VIO
0.7
1
R1
ILED (torch)
600mA · 187kΩ
R2 =
- 1
-
600mA · 187kΩ
ILED (flash)
R1 =
R1
R2
ILED
ILED
(k
Ω
Ω)(kΩ
Ω)
Torch (mA)
Flash (mA)
920
193
122
703
732
205
153
701
649
210
173
707
562
223
200
703


Ähnliche Teilenummer - AAT3171

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Advanced Analogic Techn...
AAT3170 ANALOGICTECH-AAT3170 Datasheet
467Kb / 15P
   High Current LED Flash Driver Charge Pump IC
logo
Advanced Analog Technol...
AAT3170 AAT-AAT3170 Datasheet
456Kb / 15P
   High Current LED Flash Driver Charge Pump IC
logo
Advanced Analogic Techn...
AAT3170 ANALOGICTECH-AAT3170 Datasheet
377Kb / 15P
   High Current LED Flash Driver Charge Pump IC
AAT3170IWP-T1 ANALOGICTECH-AAT3170IWP-T1 Datasheet
467Kb / 15P
   High Current LED Flash Driver Charge Pump IC
logo
Advanced Analog Technol...
AAT3170IWP-T1 AAT-AAT3170IWP-T1 Datasheet
456Kb / 15P
   High Current LED Flash Driver Charge Pump IC
More results

Ähnliche Beschreibung - AAT3171

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Advanced Analogic Techn...
AAT3177 ANALOGICTECH-AAT3177 Datasheet
776Kb / 16P
   High Current, High Efficiency Charge Pump with Auto-Timer
AAT3174 ANALOGICTECH-AAT3174 Datasheet
272Kb / 14P
   High Current, High Efficiency Charge Pump
logo
SiGe Semiconductor, Inc...
AATIAN63 SIGE-AATIAN63 Datasheet
176Kb / 4P
   High Current High Efficiency Charge Pump
logo
ON Semiconductor
NCP5603 ONSEMI-NCP5603 Datasheet
128Kb / 13P
   High Efficiency Charge Pump Converter
November, 2005 ??Rev. 1
logo
Taiwan Memory Technolog...
T6319A TMT-T6319A Datasheet
92Kb / 9P
   High Efficiency 2X charge Pump
logo
Fairchild Semiconductor
FAN5616 FAIRCHILD-FAN5616 Datasheet
917Kb / 14P
   High-Efficiency, Constant-Current LED Driver with Adaptive Charge Pump
logo
Advanced Analogic Techn...
AAT3119 ANALOGICTECH-AAT3119 Datasheet
481Kb / 16P
   High Efficiency 2X Charge Pump
AAT3119 ANALOGICTECH-AAT3119_07 Datasheet
529Kb / 18P
   High Efficiency 2X Charge Pump
logo
Maxim Integrated Produc...
MAX1570 MAXIM-MAX1570 Datasheet
358Kb / 11P
   White LED Current Regulator with 1x/1.5x High-Efficiency Charge Pump
19-2526; Rev 0; 7/02
logo
Exar Corporation
SP6683 EXAR-SP6683 Datasheet
260Kb / 14P
   1X/1.5X High Efficiency Charge Pump
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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