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SDH3812-1R0-R データシート(PDF) 2 Page - Skyworks Solutions Inc.

部品番号 SDH3812-1R0-R
部品情報  1.5A Single Flash LED Driver IC
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メーカー  SKYWORKS [Skyworks Solutions Inc.]
ホームページ  http://www.skyworksinc.com
Logo SKYWORKS - Skyworks Solutions Inc.

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AAT1274
1.5A Single Flash LED Driver IC
DATA SHEET
2
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
201981A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • May 21, 2012
Pin Descriptions
Pin # Symbol Description
1,5
AGND
Analog ground pin. Connect AGND to PGND, and FLGND at a single point as close to the AAT1274 as possible.
2
EN/SET
Enable and Serial Control input. EN/SET is the AS2Cwire addressing and programming input to: a) adjust the
movie-mode current level; b) select the Flash-to-Movie-mode ratio;
3
FL
LED Flash current sink pin. Connect the cathode of Flash LED to FL.
4
FLEN
Flash enable pin. A low-to-high transition on the FLEN pin initiates a flash pulse and a high-to-low transition
on the FLEN pin terminates a flash pulse
6IN
Flash output boost converter power input. Connect IN to the input power source. Connect a 2.2μF or larger
ceramic capacitor from IN to PGND and locate as close as possible to the AAT1274 package for optimum per-
formance.
7
PGND
Power ground. Connect PGND to the same single point as AGND located as close to the AAT1274 as possible
8
OUT
Power output of the boost converter. Connect a 2.2μF or larger ceramic capacitor from OUT to PGND as close
as possible to the AAT1274. Connect OUT to the anode of the Flash LED.
9, 12
NC
Not connected
10
SW
Boost converter switching node. Connect a 1μH inductor between SW and IN.
11
FLINH
Flash inhibit pin. FLINH is an active HIGH control input with an internal 200kΩ resistor to AGND. A low-to-
high transition on the FLINH pin reduces FL sink current to the maximum (default) movie-mode current level.
13
FLGND
Flash ground pin. Connect FLGND to PGND, and AGND at a single point as close to the AAT1274 as possible.
14
RSET
Flash current set pin. Connect a resistor from RSET to AGND to program the desired flash current for the cur-
rent sink FL.
EP
Electrical back contact. Connect to a good thermal ground pad
Pin Configuration
TDFN33-14
(Top View)
AGND
EN/SET
FL
1
FLEN
AGND
IN
RSET
FLGND
N/C
FLINH
SW
N/C
2
3
4
5
6
PGND 7
12
11
14
13
10
9
OUT
8


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