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AP3036A Datasheet

WHITE LED STEP-UP CONVERTER

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AP3036A pdf
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
General Description
The AP3036/A is an inductor-based DC/DC
converter designed to drive up to eight white LEDs in
series for backlight. Only one feedback resistor is
needed to control the LED current and obtain
required brightness.
A constant frequency 1.0MHz PWM control scheme
is employed in this IC, which means tiny external
components can be used. Specifically, 1mm tall
inductor and 0.22µF output capacitor for a typical
application is sufficient. Additionally, the Schottky
diode in boost circuit is integrated on this chip. The
AP3036/A also provides a disable pin to ease its use
for different systems.
The output over-voltage protection is implemented in
AP3036/A. When any LED is broken or in other
abnormal conditions, the output voltage will be
clamped.
The AP3036/A is available in standard SOT-23-6 and
TSOT-23-6 packages.
Features
Inherently Uniform LED Current
• High Efficiency up to 84%
• No Need for External Schottky Diode
• Output Over-voltage Protection (OVP)
• Fixed 1.0MHz Switching Frequency
• Uses Tiny 1mm Tall Inductor
• Requires Only 0.22µF Output Capacitor
• High Frequency Dimming Control
Applications
Cellular Phones
• Digital Cameras
• LCD Modules
• GPS Receivers
• PDAs, Handheld Computers
SOT-23-6
TSOT-23-6
Jul. 2012 Rev. 1.3.
Figure 1. Package Types of AP3036/A
BCD Semiconductor Manufacturing Limited
1


Diodes Semiconductor Electronic Components Datasheet

AP3036A Datasheet

WHITE LED STEP-UP CONVERTER

No Preview Available !

AP3036A pdf
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Pin Configuration
K/KT Package
(SOT-23-6/TSOT-23-6)
Pin 1 Dot by Marking
SW 1
GND 2
FB 3
6 VIN
5 VOUT
4 CTRL
Figure 2. Pin Configuration of AP3036/A (Top View)
Pin Description
Pin Number Pin Name
Function
1 SW Switch pin. Connect external inductor
2
GND
Ground
3 FB Voltage feedback pin. The reference voltage is 200mV for AP3036
and 250mV for AP3036A
Shutdown and dimming pin. Connect to 1.8V or higher to enable
4 CTRL device; Connect to 0.4V or less to disable device; Connect to a PWM
signal to achieve LEDs brightness dimming
5 VOUT Output pin. Connect to the cathode of internal Schottky diode
6 VIN Input supply pin. Must be connected to a local bypass capacitor
Jul. 2012 Rev. 1.3.
BCD Semiconductor Manufacturing Limited
2


Part Number AP3036A
Description WHITE LED STEP-UP CONVERTER
Maker BCD Semiconductor
Total Page 14 Pages
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