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Part Number: AP3019
Description: The AP3019 is an inductor-based DC/DC converter designed to drive up to five white LEDs in series for ...
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AP3019
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DataSheet
General Description
AP3019 General 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.
AP3019 Maximum Ratings
|
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.
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 Capacitor
` 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
AP3019 Typical Application
· Cellular Phones
· Digital Cameras
· LCD modules
· GPS Receivers
· PDAs, Handheld Computers
· Digital Cameras
· LCD modules
· GPS Receivers
· PDAs, Handheld Computers
AP3019 Connection Diagram
AP3019
PDF/DataSheet Download
- Datasheet: AP3019
- File Size: 294225 KB
- Manufacturer: BCD Semiconductor
- Click here to Download
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