AAT1239-1_0810 Datasheet, PDF (2/23 Pages) Advanced Analogic Technologies – 40V Step-Up Converter for 4 to 10 White LEDs

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PRODUCT DATASHEET
AAT1239-1
40V Step-Up Converter for 4 to 10 White LEDs
Pin Descriptions
Pin #
1
2
3
4
5
6, 7
8
9
10
11
12
Symbol
PVIN
EN/SET
SEL
VIN
N/C
SW
PGND
AGND
FB
OVP
LIN
Function
Input power pin; connected to the source of the P-channel MOSFET. Connect to the input capacitor(s).
IC enable pin and S²Cwire input control to set output current.
FB voltage range select. A logic LOW sets the FB voltage range from 0.4V to 0.1V; a logic HIGH sets the
FB voltage range from 0.6V to 0.3V.
Input voltage for the converter. Connect directly to the PVIN pin.
No connection.
Boost converter switching node. Connect the power inductor between this pin and LIN.
Power ground for the boost converter.
Ground pin.
Feedback pin. Connect a resistor to ground to set the maximum LED current.
Feedback pin for over-voltage protection sense.
Switched power input. Connect the power inductor between this pin and SW.
Pin Configuration
TSOPJW-12
(Top View)
PVIN 1
EN/SET 2
SEL 3
VIN 4
N/C ⁵
SW ⁶
12 LIN
11 OVP
10 FB
9 AGND
8 _PGND
7 _SW
2
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1239-1.2008.10.1.2