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AP3019

Features: ` Inherently Uniform LED Current` High Efficiency up to 84%` No Need for Extra Schottky Diode` Over Output Voltage Protection` Drives 2 to 5 LEDs` Fast 1.0MHz Switching Frequency` Uses Tiny 1mm Tall Inductor` Requires Only 0.22F Output CapacitorApplication· Cellular Phones· Digital Camer...

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SeekIC No. : 004286288 Detail

AP3019: Features: ` Inherently Uniform LED Current` High Efficiency up to 84%` No Need for Extra Schottky Diode` Over Output Voltage Protection` Drives 2 to 5 LEDs` Fast 1.0MHz Switching Frequency` Uses Tin...

AP3019 Data Sheet

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Part Number:
AP3019
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Product Details

Description



Features:

` Inherently Uniform LED Current
` High Efficiency up to 84%
` No Need for Extra Schottky Diode
` Over Output Voltage Protection
` Drives 2 to 5 LEDs
` Fast 1.0MHz Switching Frequency
` Uses Tiny 1mm Tall Inductor
` Requires Only 0.22F Output Capacitor


Application

· Cellular Phones
· Digital Cameras
· LCD modules
· GPS Receivers
· PDAs, Handheld Computers


Pinout

Connection Diagram


Specifications

Parameter
Symbol
Value
Unit
Input Voltage
VIN
20
V
SW Voltage
27
V
FB Voltage
20
V
CTRL Voltage
20
V
Thermal Resistance (Junction to Atmosphere, no Heat sink)
RJA
265
oC/W
Operating Junction Temperature
150
oC
Storage Temperature Range
TSTG
-65 to 150
oC
Lead Temperature (Soldering, 10sec)
TLEAD
260
oC
ESD (Machine Model)
250
V
ESD (Human Body Model)
2000
V

Note 1: Stresses greater than those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "Recommended Operating Conditions" is not implied. Exposure to "Absolute Maximum Ratings" for extended
periods may affect device reliability.




Description

The AP3019 is an inductor-based DC/DC converter designed to drive up to five white LEDs in series for backlight. Only one feedback resistor is needed to control the LED current and obtain satisfied brightness.

A constant frequency 1.0MHz PWM control scheme is employed in this IC, which means the tiny external components can be used. In fact, 1mm tall inductor and 0.22F output capacitor for the typical application is very appropriate. Additionally, the schottky diode in boost circuit is integrated in this chip. AP3019 also provides a disable port to ease its use for different systems.

The over output voltage protection is equipped in AP3019. When any LED is broken or in other abnormal conditions, the output voltage will be clamped to 27V.

The AP3019 is available in standard SOT-23-6 package.




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