AP3154 Datasheet, PDF (1/13 Pages) Diodes Incorporated – 120mA HIGH EFFICIENCY WHITE LED DRIVER

AP3154
120mA HIGH EFFICIENCY WHITE LED DRIVER
Features
General Description
• Up to 88% Max power efficiency
• Wide input voltage range: 2.7V ~ 5.5V
• 1x, 1.5x, and 2x charge-pump modes
• Drive up to 4 white LEDs
• Default maximum current setting: 30mA each channel
• 120mA maximum output current through 4 channels
• Programmable switching frequency, default 1.2MHz
• Spread Spectrum Control with 10% frequency deviation
• 1-wire Serial Digital Interface (SDI) or PWM for dimming
control
• Soft-start during power-up and mode switching
• Soft-stop during shutdown
• Short-circuit protection
• Over-voltage protection and under-voltage lockout
• Low shutdown current < 6µA
• Industry-leading low profile package
• DFN3030-12: Available in “Green” Molding Compound
(No Br, Sb)
• Lead Free Finish / RoHS Compliant (Note 1)
The AP3154 is a high efficiency charge-pump white LED driver
with 1x, 1.5x, 2x operating modes. The AP3154 operates on
power supplies from 2.7v to 5.5v. It drives up to four channels of
white LEDs while the intensity of each channel is configured by
varying the respective current levels. Each channel can supply up
to 30mA current. Up to four channels can be ganged together to
provide maximum load current of 120mA.
The Serial Digital Interface (SDI) provides the capability to
configure the current for each LED channel. Some other key
features, such as Up Spread Spectrum Control, different
charge-pump switching frequencies (0.6MHz/1.2MHz/1.8MHz),
and PWM dimming control, can also be programmed through the
interface.
The AP3154 has a built-in soft-start circuit to minimize the inrush
current during power-up and mode switching. Various protections
such as short-circuit, over-voltage, under-voltage, and thermal
shutdown are integrated to ensure system reliability. The
quiescent current of AP3154 during shutdown is less than 6µA.
Applications
• Mobile Phone
• PDA (Personal Digital Assistant)
• White LED Backlighting
• Camera Flash LED Lighting
• LCD Modules
• Portable Devices
Ordering Information
AP 3154 F G - 7
Package
F : DFN3030-12
Green
G : Green
Packing
7 : Tape & Reel
Device
AP3154FG-7
Package Code
F
Packaging
(Note 2)
DFN3030-12
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
http://www.diodes.com/products/lead_free.html.
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf
AP3154 Rev. 2
1 of 13
www.diodes.com
FEBRUARY 2009
© Diodes Incorporated