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PDF AP3036 Data sheet ( Hoja de datos )
| Número de pieza | AP3036 | |
| Descripción | WHITE LED STEP-UP CONVERTER | |
| Fabricantes | BCD Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP3036 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
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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
1 page  
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Electrical Characteristics
VIN =3V, VCTRL=3V, TA=25°C, unless otherwise specified.
Parameter
Symbol
Conditions
Min
Minimum Operating Voltage
Maximum Operating Voltage
Feedback Voltage
FB Pin Bias Current
Quiescent Current
Shutdown Quiescent Current
Switching Frequency
VIN (Min)
VIN (Max)
AP3036
VFB AP3036A
IFB
IQ
ISHDN
IOUT=20mA, 4 LEDs
VFB=VIN,
Switching
VCTRL=0V
No
f
2.5
188
235
1.6
Maximum Duty Cycle
Switch Current Limit (Note 2)
Switch VCE Saturation Voltage
Switch Leakage Current
CTRL Pin Voltage
DMAX
ILIMIT
VCESAT
VCTRL
D=40% or 80%
ISW=250mA
VSW=5V
High
Low
90
1.8
CTRL Pin Bias Current
OVP Voltage
Schottky Forward Drop
Schottky Leakage Current
Soft Start Time
ICTRL
VOV
VDROP
t
ID=150mA
VR(Reverse
Voltage)=23V
VR(Reverse
Voltage)=27V
Thermal Resistance
(Junction to Case)
SOT-23-6
θJC
TSOT-23-6
Typ
200
250
35
3.1
45
1.0
93
550
360
0.01
100
30
0.7
0.1
100
60
60
Max Unit
V
16
212
mV
265
100 nA
3.9 mA
75 µA
MHz
%
mA
mV
5 µA
V
0.4
µA
V
V
4
µA
150
µs
°C/W
Note 2: The switch current limit is related to duty cycle. Please refer to Figure 16 for detail.
Jul. 2012 Rev. 1.3.
BCD Semiconductor Manufacturing Limited
5
5 Page 
WHITE LED STEP-UP CONVERTER
Typical Application
Preliminary Datasheet
AP3036/A
Figure 22. Typical Application of AP3036/A (Note 3)
Note 3: C: X5R or X7R type dielectric, L: SUMIDA CDRH5D28R-220NC or equivalent. And, this circuit can
work in full temperature.
Jul. 2012 Rev. 1.3.
BCD Semiconductor Manufacturing Limited
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet AP3036.PDF ] | |
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