Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
General Description
Features
The AP3009 is an inductor-based DC/DC converter
designed to drive up to six white LEDs in series for
backlight. Only one feedback resistor is needed to control the LED current and obtain satisfied brightness.
·
·
·
·
·
·
·
·
A constant frequency 1.2MHz PWM control scheme is
employed in this IC, which means the tiny external
components can be used. In fact, 1mm tall inductor and
0.22µF output capacitor for the typical application is
very appropriate. Additionally, the schottky diode in
boost circuit is integrated in this chip. AP3009 also
provide a disable port to ease its use for different systems.
Inherently Uniform LED Current
High Efficiency: 83% Typical
No Need for Extra Schottky Diode
Over Output Voltage Protection
Drives 2 to 6 LEDs
Fast 1.2MHz Switching Frequency
Uses Tiny 1mm Tall Inductor
Requires Only 0.22µF Output Capacitor
Applications
·
·
·
·
·
The over output voltage protection is equipped in
AP3009. When any LED is broken or in other abnormal conditions, the output voltage will be clamped to
30V.
Cellular Phones
Digital Cameras
LCD modules
GPS Receivers
PDAs, Handheld Computers
The AP3009 is available in standard SOT-23-6 package.
SOT-23-6
Figure 1. Package Type of AP3009
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
1
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Pin Configuration
K Package
(SOT-23-6)
Pin 1 Mark
VOUT
1
6
SW
GND
2
5
VIN
FB
3
4
CTRL
Figure 2. Pin Configuration of AP3009 (Top View)
Pin Description
Pin Number
Pin Name
Function
1
VOUT
Output Pin. Connected to the cathode of internal schottky diode
2
GND
Ground Pin
3
FB
4
CTRL
5
VIN
Input Supply Pin. Must be locally bypassed
6
SW
Switch Pin. Connect external inductor
Voltage Feedback. Reference voltage is 200mV
Shutdown and Dimming Pin. Connect to 1.8V or higher to enable device; Connect to 50mV or
less to disable device; Connect to a voltage between 1.8V and 50mV to achieve linear dimming
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
2
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Functional Block Diagram
FB
SW
3
VIN
5
VREF
1.25 V
6
200 mV
1
OVP
DRIVER
A1
A2
Q
R
VOUT
Q1
S
COMPARATOR
Σ
CTRL
2
4
GND
RAMP
GENERATOR
1.2 MHz
OSCILLATOR
Figure 3. Functional Block Diagram of AP3009
Ordering Information
AP3009
-
Circuit Type
E1: RoHS
Package
TR: Tape and Reel
K: SOT-23-6
Package
SOT-23-6
Temperature Range
o
-40 to 85 C
Part Number
AP3009KTR-E1
Marking ID
E9T
Packing Type
Tape & Reel
BCD Semiconductor's products as designated with "E1" suffix in the part number are RoHS compliant.
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
3
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
VIN
20
V
SW Voltage
38
V
FB Voltage
20
V
CTRL Voltage
20
V
265
oC/W
150
oC
TSTG
-65 to 150
oC
TLEAD
260
oC
ESD (Machine Model)
250
V
ESD (Human Body Model)
2000
V
Input Voltage
θJA
Thermal Resistance (Junction to Atmosphere, no Heat sink)
Operating Junction Temperature
Storage Temperature Range
Lead Temperature (Soldering, 10sec)
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.
Recommended Operating Conditions
Parameter
Symbol
Min
Max
Unit
Operating Temperature Range
TOP
-40
85
oC
Input Voltage
VIN
2.5
16
V
CTRL Voltage
VCTRL
16
V
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
4
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Electrical Characteristics
(VIN=3V, VCTRL =3V, TA=25oC, unless otherwise specified.)
Parameter
Symbol
Minimum Operating Voltage
VIN(min)
Maximum Operating Voltage
VIN(max)
Conditions
Min
Typ
Max
Unit
2.5
V
16
IOUT=20mA, 4 LEDs,
Feedback Voltage
VFB
FB Pin Bias Current
IFB
Supply Current
ICC
V FB=VIN, Not Switching
Supply Current
IQ
V CTRL=0V
Switching Frequency
200
212
mV
35
100
nA
1.9
2.6
3.3
mA
2.0
3.2
5.0
µA
f
0.8
1.2
1.6
MHz
Maximum Duty Cycle
DMAX
90
93
Switch Current Limit (Note 2)
ILIMIT
Switch VCE Saturation Voltage
VCESAT
Switch Leakage Current
CTRL Pin Voltage
VCTRL
TA=-40oC to 85oC
188
TA=25oC, D=40%
560
TA=25oC, D=80%
465
ISW=250mA
300
V SW=5V
0.01
High
Schottky Forward Drop
ICTRL
VDROP
5
µA
V
48
60
72
TA=85oC
40
50
60
TA=-40oC
60
75
90
ID=150mA
0.7
µA
V
4
V R=30V
Thermal Resistance
(Junction to Case)
mV
0.05
V R=25V
Schottky Leakage Current
mA
1.8
Low
CTRL Pin Bias Current
%
µA
90
θJC
60.84
oC/W
Note 2: The Switch Current Limit is related to Duty Cycle. Please refer to Figure 16 for detail.
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
5
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Performance Characteristics
85
85
84
84
Efficiency (%)
Efficiency (%)
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
83
82
83
82
o
VIN=3.6V, IOUT=20mA, 4 LEDs
CIN=1µF, COUT=0.22µF, L=22µH
81
80
-50
-25
0
25
50
75
4 LEDs, IOUT=20mA, TA=25 C
CIN=1µF, COUT=0.22µF, L=22µH
81
80
2.5
100
3.0
o
Figure 4. Efficiency vs. Junction Temperature
4.0
4.5
5.0
Figure 5. Efficiency vs. Input Voltage
86
Schottky Forward Current (mA)
350
84
Efficiency (%)
3.5
Input Voltage (V)
Junction Temperature ( C)
82
80
o
VIN=3.6V, IOUT=20mA, TA=25 C
CIN=1µF, COUT=0.22µF, L=22µH
78
3
4
5
250
200
150
100
50
76
2
300
0
6
0
LEDs (pcs)
200
400
600
800
1000
Schottky Forward Drop (mV)
Figure 6. Efficiency vs. LED's Number
Figure 7. Schottky Forward Current
vs. Schorttky Forward Drop
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
6
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Performance Characteristics (Continued)
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
3.5
3.0
25
Supply Current (mA)
Shutdown Quiescent Current (µA)
30
20
15
10
5
2.5
2.0
1.5
o
1.0
25 C
o
100 C
o
-50 C
0.5
0.0
0
4
6
8
10
12
14
0
16
2
4
Input Voltage (V)
Figure 8. Shutdown Quiescent Current vs. Input Voltage
8
10
12
14
16
Figure 9. Supply Current vs. Input Voltage
5.0
Input Current in Ouput Open Circuit (mA)
32.0
31.5
Output Clamp Voltage (V)
6
Input Voltage (V)
31.0
30.5
30.0
29.5
29.0
28.5
4
6
8
10
12
14
4.6
4.4
4.2
4.0
3.8
3.6
3.4
3.2
2.5
28.0
2
4.8
16
3.0
3.5
4.0
4.5
5.0
Input Voltage (V)
Input Voltage (V)
Figure 10. Output Clamp Voltage vs. Input Voltage
Figure 11. Input Current in Output Open Circuit
vs. Input Voltage
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
7
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Performance Characteristics (Continued)
1.25
202
1.20
201
Feedback Voltage (mV)
Switching Frequency (MHz)
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
1.15
1.10
1.05
1.00
0.95
-50
200
199
198
197
-25
0
25
50
75
196
-50
100
-25
o
0
25
50
Figure 13. Feedback Voltage
vs. Junction Temperature
vs. Junction Temperature
1.0
0.80
VR=10V
VR=16V
VR=25V
Schottky Leakage Current (uA)
Schottky Forward Drop (V)
0.78
0.76
0.74
0.72
0.70
0.68
0.66
0.64
0.60
-50
100
Junction Temperature ( C)
Figure 12. Switching Frequency
0.62
75
o
Junction Temperature ( C)
0.8
0.6
0.4
0.2
ID=150mA
-25
0
25
50
75
0.0
-50
100
o
-25
0
25
50
75
100
o
Junction Temperature ( C)
Junction Temperature ( C)
Figure 14. Schottky Forward Drop
vs. Junction Temperature
Figure 15. Schottky Leackage Current
vs. Junction Temperature
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
8
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Performance Characteristics (Continued)
(VF of WLED is 3.45V @ IF=20mA, unless otherwise noted )
400
700
o
Switching Current Limit (mA)
600
Switch Saturation Voltage (mV)
-50 C
o
25 C
o
100 C
500
400
300
200
100
30
40
50
60
70
80
90
350
300
250
200
150
100
50
50
100
100
150
200
250
300
Switch Current (mA)
Duty Cycle (%)
Figure 17. Switch Saturation Voltage
Figure 16. Switch Current Limit vs. Duty Cycle
vs. Switch Current
250
Feedback Voltage (mV)
200
150
100
50
0
0.0
0.5
1.0
1.5
2.0
CTRL Pin Voltage (V)
Figure 18. Feedback Voltage vs. CTRL Pin Voltage
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
9
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Application
VIN ≥ 3V
22µΗ
6
5
Control
Signal
4
VIN
1
SW
V OUT
AP3009
CTRL
0.22µF
FB
GND
1µF
3
10Ω
2
a. Four White LEDs Driver
VIN ≥ 3V
22µΗ
1
6
5
Control
Signal
4
1µF
VIN
SW
VOUT
AP3009
CTRL
GND
0.22µF
FB
3
10Ω
2
b. Five White LEDs Driver
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
10
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Typical Application (Continued)
VIN ≥ 3V
22µΗ
6
5
Control
Signal
4
1µF
VIN
1
SW
VOUT
AP3009
CTRL
GND
0.22µF
FB
3
10Ω
2
c. Six White LEDs Driver
C: X5R or X7R Dielectric
L: SUMIDA CDRH5D28R-220NC or Equivalent
All these circuits can work in full temperature
Figure 19. Typical White LED Drivers
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
11
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Mechanical Dimensions
SOT-23-6
Unit: mm(inch)
0°
2.820(0.111)
8°
3.100(0.122)
0.300(0.012)
0.500(0.020)
5
4
2
3
0.300(0.012)
0.600(0.024)
1.500(0.059)
1.700(0.067)
2.650(0.104)
3.000(0.118)
6
0.200(0.008)
Pin 1 Mark
1
0.700(0.028)REF
0.950(0.037)TYP
0.000(0.000)
0.150(0.006)
1.800(0.071)
2.000(0.079)
0.100(0.004)
0.200(0.008)
0.900(0.035) 1.450(0.057)
MAX
1.300(0.051)
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
12
Data Sheet
WHITE LED STEP-UP CONVERTER
AP3009
Mounting Pad Layout
SOT-23-6
E
E
Y
G
Z
X
Dimensions
Z
(mm)/(inch)
G
(mm)/(inch)
X
(mm)/(inch)
Y
(mm)/(inch)
E
(mm)/(inch)
Value
3.600/0.142
1.600/0.063
0.700/0.028
1.000/0.039
0.950/0.037
May 2013 Rev. 2. 0
BCD Semiconductor Manufacturing Limited
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