Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

SP6685ERTR Datasheet(PDF) 8 Page - Sipex Corporation

Part # SP6685ERTR
Description  Charge Pump LED Driver For Camera Flash
Download  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  SIPEX [Sipex Corporation]
Direct Link  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP6685ERTR Datasheet(HTML) 8 Page - Sipex Corporation

Back Button SP6685ERTR Datasheet HTML 2Page - Sipex Corporation SP6685ERTR Datasheet HTML 3Page - Sipex Corporation SP6685ERTR Datasheet HTML 4Page - Sipex Corporation SP6685ERTR Datasheet HTML 5Page - Sipex Corporation SP6685ERTR Datasheet HTML 6Page - Sipex Corporation SP6685ERTR Datasheet HTML 7Page - Sipex Corporation SP6685ERTR Datasheet HTML 8Page - Sipex Corporation SP6685ERTR Datasheet HTML 9Page - Sipex Corporation SP6685ERTR Datasheet HTML 10Page - Sipex Corporation  
Zoom Inzoom in Zoom Outzoom out
 8 / 10 page
background image
8
Date: 12/15/04
SP6685 Charge Pump LED Driver for Camera Flash
© Copyright 2004 Sipex Corporation
For an example of 200mA Torch mode and
600mA Flash mode, the values R
SENSE =
0.25Ω, V
FBREF = 150mV (Flash Mode), and
R
SET = 88.7K are calculated.
The power
obtained in the Flash mode would be:
P
FLASH = VFB *IOUT = 150mV*600mA = 90mW.
The typical 0603 surface mount resistor is
rated 1/10 watt continuous power and 1/5
watt pulsed power, more than enough for
this application. For other applications, the
P
FLASH can be calculated from the resistor
size selected. The R
SENSE resistor is recom-
mended to be size 0603 for most applica-
tions.
COMPONENT SELECTION
The sense resistor R
sense is determined by
the value needed in the Torch mode for the
desired output current by the equation:
R
SENSE = VFB / IOUT where VFB = 50mV (Torch
Mode)
The SP6685 charge pump circuit requires 3
capacitors: input, output and fly capacitor,
and a 1
µF value is typically recommended.
For the input capacitor, a larger value of
2.2
µF or 4.7µF will help reduce input volt-
age ripple for applications sensitive to ripple
on the battery voltage. All the capacitors
should be ceramic to obtain low ESR, which
improves bypassing on the input and output
and improves output voltage drive by reduc-
ing output resistance. X5R or X7R Ceramic
capacitors are recommended for most ap-
plications. A selection of recommended
capacitors is included in Table 1. The input
and output capacitors should be located as
close to the V
IN and VOUT pins as possible to
obtain best bypassing, and the returns
should be connected directly to the P
GND pin
or to the thermal pad ground located under
the SP6685. The fly capacitor should be
located as close as possible to the C1 and
C2 pins as possible.
Once the R
SENSE resistor has been selected
for Torch mode, the V
FB voltage can be
selected for Flash mode using the following
equation:
V
FB = IOUT *RSENSE (Flash Mode) where IOUT is
for Flash Mode
Next, the R
SET resistor can be selected for
Flash mode using the following equation:
R
SET = (1.26V/ VFB)*11.2KΩ (Flash Mode)
Part Reference
Part Number
Value
Size
Manufacturers/ Website
U1
SP6685ER
3x3mm DFN - 10 pin
Sipex/www.sipex.cpm
CIN
GRM188R0J475KE19
4.7uF/6.3V
0603/X5R/0.9mm ht
Murata/www.murata.com
COUT, CF
GRM155R60J105KE19B
1uF/6.3V
0402/X5R/0.5mm ht
Murata/www.murata.com
RSET
-
88.7K
0402
any
RSENSE
-
0.22ohms
0603
any


Similar Part No. - SP6685ERTR

ManufacturerPart #DatasheetDescription
logo
Sipex Corporation
SP6685ER SIPEX-SP6685ER Datasheet
278Kb / 16P
   700mA Buck/Boost Charge Pump LED Driver
SP6685ER SIPEX-SP6685ER Datasheet
187Kb / 4P
   Evaluation Board Manual
logo
Exar Corporation
SP6685ER-L EXAR-SP6685ER-L Datasheet
565Kb / 14P
   700mA Buck/Boost Charge Pump LED Driver
SP6685ER-L/TR EXAR-SP6685ER-L/TR Datasheet
565Kb / 14P
   700mA Buck/Boost Charge Pump LED Driver
logo
Sipex Corporation
SP6685ER/TR SIPEX-SP6685ER/TR Datasheet
278Kb / 16P
   700mA Buck/Boost Charge Pump LED Driver
More results

Similar Description - SP6685ERTR

ManufacturerPart #DatasheetDescription
logo
Monolithic Power System...
MP3214 MPS-MP3214 Datasheet
329Kb / 9P
   500mA LED Camera Flash Charge Pump
logo
Semtech Corporation
SC615A SEMTECH-SC615A_08 Datasheet
225Kb / 12P
   Charge Pump Flash LED Driver
SC635 SEMTECH-SC635 Datasheet
362Kb / 12P
   Charge Pump Flash LED Driver
SC615A SEMTECH-SC615A Datasheet
207Kb / 12P
   Charge Pump Flash LED Driver
SC605 SEMTECH-SC605 Datasheet
361Kb / 12P
   Charge Pump Flash LED Driver
SC615 SEMTECH-SC615 Datasheet
202Kb / 12P
   Charge Pump Flash LED Driver
logo
Monolithic Power System...
EV3214DQ-00A MPS-EV3214DQ-00A Datasheet
200Kb / 4P
   500mA, LED Camera Flash Charge Pump EV Board
logo
Linear Technology
LTC3214 LINER-LTC3214 Datasheet
184Kb / 12P
   500mA Camera LED Charge Pump
LTC3214 LINER-LTC3214_15 Datasheet
160Kb / 12P
   500mA Camera LED Charge Pump
logo
Global Mixed-mode Techn...
G5916 GMT-G5916 Datasheet
42Kb / 1P
   Flash LED Driver with 700mA Charge Pump
More results


Html Pages

1 2 3 4 5 6 7 8 9 10


Datasheet Download

Go To PDF Page


Link URL




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

About Alldatasheet   |   Advertisement   |   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