BCD AP3036 White led step-up converter Datasheet

Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
General Description
Features
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.
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
•
•
•
•
•
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.
Cellular Phones
Digital Cameras
LCD Modules
GPS Receivers
PDAs, Handheld Computers
The AP3036/A is available in standard SOT-23-6 and
TSOT-23-6 packages.
SOT-23-6
TSOT-23-6
Figure 1. Package Types of AP3036/A
Jul. 2012
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
1
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
6
VIN
GND
2
5
VOUT
FB
3
4
CTRL
Figure 2. Pin Configuration of AP3036/A (Top View)
Pin Description
Pin Number
Pin Name
1
SW
2
GND
3
FB
Voltage feedback pin. The reference voltage is 200mV for AP3036
and 250mV for AP3036A
4
CTRL
Shutdown and dimming pin. Connect to 1.8V or higher to enable
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
Jul. 2012
Function
Switch pin. Connect external inductor
Ground
Input supply pin. Must be connected to a local bypass capacitor
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Functional Block Diagram
Figure 3. Functional Block Diagram of AP3036/A
Ordering Information
AP3036
-
Circuit Type
G1: Green
Blank: AP3036
A: AP3036A
TR: Tape & Reel
Package
K: SOT-23-6
KT: TSOT-23-6
Package
Temperature
Range
SOT-23-6
-40 to 85°C
TSOT-23-6
Part Number
Marking ID
Packing Type
AP3036KTR-G1
GHI
Tape & Reel
AP3036AKTR-G1
GJE
Tape & Reel
AP3036KTTR-G1
L2C
Tape & Reel
AP3036AKTTR-G1
L3C
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Jul. 2012
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Absolute Maximum Ratings (Note 1)
Parameter
Symbol
Value
Unit
Input Voltage
VIN
20
V
SW Pin Voltage
VSW
38
V
Feedback Voltage
VFB
20
V
VCTRL
20
V
θJA
265
°C/W
TJ
150
°C
Storage Temperature Range
TSTG
-65 to 150
°C
Lead Temperature (Soldering, 10sec)
TLEAD
260
°C
ESD (Machine Model)
250
V
ESD (Human Body Model)
2000
V
CTRL Pin Voltage
Thermal Resistance (Junction
Ambient, No Heat Sink)
Operating Junction Temperature
to
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
°C
Input Voltage
VIN
2.5
16
V
16
V
CTRL Pin Voltage
Jul. 2012
VCTRL
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Electrical Characteristics
VIN =3V, VCTRL=3V, TA=25°C, unless otherwise specified.
Parameter
Symbol
Minimum Operating Voltage
VIN (Min)
Maximum Operating Voltage
VIN (Max)
Conditions
Min
Typ
Max
Unit
2.5
V
Feedback Voltage
VFB
AP3036
AP3036A
16
IOUT=20mA, 4 LEDs
FB Pin Bias Current
IFB
Quiescent Current
IQ
VFB=VIN,
Switching
ISHDN
VCTRL=0V
Shutdown Quiescent Current
Switching Frequency
f
Maximum Duty Cycle
DMAX
Switch Current Limit (Note 2)
ILIMIT
Switch VCE Saturation Voltage
VCESAT
Switch Leakage Current
1.6
200
250
212
265
mV
35
100
nA
3.1
3.9
mA
45
75
µA
1.0
MHz
93
%
D=40% or 80%
550
mA
ISW=250mA
360
mV
VSW=5V
0.01
90
High
CTRL Pin Voltage
No
188
235
5
µA
1.8
VCTRL
V
Low
0.4
CTRL Pin Bias Current
ICTRL
100
µA
OVP Voltage
VOV
30
V
0.7
V
Schottky Forward Drop
VDROP
VR(Reverse
Voltage)=23V
VR(Reverse
Voltage)=27V
Schottky Leakage Current
Soft Start Time
Thermal Resistance
(Junction to Case)
ID=150mA
t
0.1
4
µA
150
100
SOT-23-6
60
TSOT-23-6
60
θJC
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
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Performance Characteristics
The WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
90
88
1600
VIN=3.6V
Schottky Forward Voltage (mV)
IOUT=20mA
86
Efficiency (%)
84
82
80
78
76
74
1200
800
400
0
72
2
3
4
5
6
7
8
0
LED Numbers
200
300
400
500
Schottky Forward Current (mA)
Figure 4. Efficiency vs. LED’s Number
Figure 5. Schottky Forward Voltage vs.
Schottky Forward Current
3.8
100
90
VCRTL=0V
VFB=1.0V
3.6
Quiescent Current (mA)
Shutdown Current (µA)
100
80
70
60
50
3.4
3.2
3.0
40
2.8
30
0
2
4
6
8
10
12
14
16
18
20
0
Input Voltage (V)
8
12
16
20
Input Voltage (V)
Figure 6. Shutdown Current vs. Input Voltage
Jul. 2012
4
Figure 7. Quiescent Current vs. Input Voltage
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
6
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Performance Characteristics (Continued)
The WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
300
250
Current Limit (mA)
Feedback Voltage (mV)
600
200
150
VIN=3.6V
500
400
VIN=3.6V, 5 LEDs
AP3036
AP3036A
300
100
-40
0
40
80
120
160
-40
0
40
80
120
160
O
O
Temperature ( C)
Temperature ( C)
Figure 8. Feedback Voltage vs. Temperature
Figure 9. Current Limit vs. Temperature
800
700
VIN=3.6V, 5 LEDs
VIN=VCRTL=3.6V
Rising
Down
600
CTRL Voltage (V)
Saturation Voltage (mV)
1.2
500
400
300
200
0.8
0.4
100
0
0.0
0
100
200
300
400
500
-40
40
80
120
160
Temperature ( C)
Figure 10. Saturation Voltage vs. Switch Current
Jul. 2012
0
O
Switch Current (mA)
Figure 11. CTRL Pin Voltage vs. Temperature
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Performance Characteristics (Continued)
The WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
36
Operating Frequency (MHz)
32
OVP Voltage (V)
VIN=3.6V
1.2
VIN=VCRTL=3.6V
28
24
5 LEDs
1.0
0.8
20
0.6
-40
0
40
80
120
-40
160
0
O
40
80
120
160
O
Temperature ( C)
Temperature ( C)
Figure 12. OVP Voltage vs. Temperature
Figure 13. Operating Frequency vs. Temperature
90
88
VIN=3.6V
85
80
Efficiency (%)
80
Efficiency (%)
5 LEDs
84
75
70
76
72
68
ILED=20mA
65
64
8 LEDs
60
60
20
2
4
6
8
10
12
14
16
18
30
40
50
60
70
Output Current (mA)
20
Input Voltage (V)
Figure 14. Efficiency vs. Input Voltage
Jul. 2012
Figure 15. Efficiency vs. Output Current
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
8
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Performance Characteristics (Continued)
The WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
30
30
VIN=3.6V, 5 LEDs
25
VIN=3.6V, 5 LEDs
25
PWM Frequency=100KHz
LED Current (mA)
LED Current (mA)
PWM Frequency=0.5kHz
20
15
10
20
15
10
5
5
0
0
0
0
20
40
60
80
20
40
60
80
100
Duty (%)
100
Duty (%)
Figure 16. LED Current vs. Duty
Figure 17. LED Current vs. Duty
VCTRL
2V/div
VIN
2V/div
VSW
10V/div
VSW
10V/div
VOUT
10V/div
VOUT
10V/div
IL
100mA/div
ILED
10mA/div
Time 40µs/div
Figure 18. Powering On
(VIN=3.6V, VCTRL=2.5V, ILED=20mA, 5 LEDs)
Jul. 2012
Time 10ms/div
Figure 19. PWM Dimming
(VIN=3.6V, VPWM=2.5V, fPWM=0.5kHz, Duty=50%, 5 LEDs)
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
9
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Performance Characteristics (Continued)
The WLED forward voltage (VF) is 3.45V at IF=20mA, unless otherwise noted.
VIN
2V/div
VIN
2V/div
VSW
10V/div
VSW
10V/div
VOUT1(AC)
100mV/div
VOUT
10V/div
IL
100mA/div
ILED
10mA/div
Time 1µs/div
Figure 20. Output Voltage Ripple
(VIN=VCTRL=3.6V, ILED=20mA, 5 LEDs)
Jul. 2012
Time 10µs/div
Figure 21. PWM Dimming
(VIN=3.6V, VPWM=2.5V, fPWM=100kHz, Duty=50%, 5 LEDs)
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
10
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Typical Application
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
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Mechanical Dimensions
SOT-23-6
Unit: mm(inch)
0°
2.820(0.111)
8°
3.020(0.119)
0.300(0.012)
0.400(0.016)
6
0.200(0.008)
5
0.300(0.012)
0.600(0.024)
4
Pin 1 Dot by Marking
1
2
3
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)
Jul. 2012
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
12
Preliminary Datasheet
WHITE LED STEP-UP CONVERTER
AP3036/A
Mechanical Dimensions (Continued)
TSOT-23-6
2.800(0.110)
3.000(0.118)
1.500(0.059)
1.700(0.067)
Unit: mm(inch)
R0.100(0.004)
MIN
0°
8°
2.600(0.102)
3.000(0.118)
Pin 1 Dot by
Marking
0.370(0.015)
MIN
0.950(0.037)
BSC
0.100(0.004)
0.250(0.010)
1.900(0.075)
BSC
0.250(0.010)
BSC
GAUGE
PLANE
0.700(0.028)
0.900(0.035)
1.000(0.039)
MAX
0.000(0.000)
0.100(0.004)
Jul. 2012
0.350(0.014)
0.510(0.020)
Rev. 1.3.
BCD Semiconductor Manufacturing Limited
13
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