Part Number

AHK3294

Description

Four-Channel LED Driver

Manufacture

Skyworks

Total Page 13 Pages
PDF Download
Download AHK3294 Datasheet PDF


Features Datasheet pdf General Description The AHK3294 is a lin ear current-sink LED driver, capable of driving one, two, three or four LEDs u p to 30.2mA each. Featuring individual low resistance, low drop-out voltage cu rrent sinks, the AHK3294 allows the LED s to be regulated directly from a Lithi um Ion/Polymer battery without the need for an additional step-up power supply , thereby reducing the external compone nt count, eliminating switching noise a nd maximizing efficiency. Skyworks' Sim ple Serial Control™ (S2Cwire™) inte rface is used to enable, disable, and s et the LED drive current for 32-level l inear scale LED brightness control. For flexible control the maximum LED curre nt of up to 30.2mA per channel is set vi.
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AHK3294 Datasheet
General Description
The AHK3294 is a linear current-sink LED driver, capable
of driving one, two, three or four LEDs up to 30.2mA
each. Featuring individual low resistance, low drop-out
voltage current sinks, the AHK3294 allows the LEDs to
be regulated directly from a Lithium Ion/Polymer battery
without the need for an additional step-up power supply,
thereby reducing the external component count, elimi-
nating switching noise and maximizing efficiency.
Skyworks' Simple Serial Control™ (S2Cwire™) interface is
used to enable, disable, and set the LED drive current for
32-level linear scale LED brightness control. For flexible
control the maximum LED current of up to 30.2mA per
channel is set via an external resistor.
The AHK3294 is packaged in a Pb-free, 8 pin SC70JW
package and is available over a -40 to +85OC tempera-
ture range.
DATA SHEET
AHK3294
Four-Channel LED Driver
Features
2.7V to 5.5V Input Supply Range
Drives up to 4 LEDs at up to 30.2mA each
Low-Dropout, Low Resistance Current Sinks
Typically 40.5mV at Full Scale
Linear LED Output Current Control
S2Cwire Interface
Single-wire
32 Steps
External RSET Resistor
±10% LED Output Current Accuracy
±3% LED Output Current Matching
Low Current Shutdown Mode
Small 8-Pin SC70JW Package
Applications
Entry Level Mobile Phones
Keyboard Backlight
MP3 Players
Indicator LEDs
Typical Application
Input Voltage
2.7V to 5.5V
EN/SET
S2Cwire
Interface
CIN
RSET
9.53kΩ
IN
AHK3294
EN
RSET
D1
D2
D3
D4
GND
Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com
202172A • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • July 13, 2012
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