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A8434 Folha de dados(PDF) 3 Page - Allegro MicroSystems

Nome de Peças A8434
Descrição Electrónicos  6-Channel High Efficiency Charge Pump White LED Driver
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Fabricante Electrônico  ALLEGRO [Allegro MicroSystems]
Página de início  http://www.allegromicro.com
Logo ALLEGRO - Allegro MicroSystems

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6-Channel High Efficiency Charge Pump
White LED Driver
A8434
3
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Name
Number
Function
C1–
13
Negative terminal of capacitor C1. Connect capacitor C1 between C1+ and C1–.
C1+
16
Positive terminal of capacitor C1.
C2–
15
Negative terminal of capacitor C2
C2+
1
Positive terminal of capacitor C2. Connect capacitor C2 between C2+ and C2–.
ENS
4
Enable and dimming control input for sub display WLED group.
ENM
5
Enable and dimming control input for main display WLED group.
EP
Exposed metal pad on bottom side. Connect this to ground plane for better thermal performance.
GND
12
Ground.
ISET
3
Connect RSET resistor to ground to set desired constant current through main and sub WLEDs.
ILED(max) = 220 x 0.6 V/RSET
LED1, LED2,
LED3, and LED4
8, 9, 10,
and 11
Current sink for main display WLEDs. If not used, connect to VOUT, but do not leave open. If left
open, the IC works in 2 × mode.
LED5 and LED6
6 and 7
Current sink for sub display WLEDs. If not used, connect to VOUT, but do not leave open. If left open,
the IC works in 2 × mode.
VIN
14
Power supply voltage input.
VOUT
2
Charge pump output voltage for display backlight and flash/torch LED anodes.
Connect a 1 μF capacitor, COUT, between VOUT and GND (see figure 2).
12
11
10
9
GND
LED1
EP
LED2
LED3
1
2
3
4
C2+
VOUT
ISET
ENS
Terminal List Table
ES Package
(Top View)
Pin-out Diagram


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