APW7213/4
1.4MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs
Features
•
•
•
•
•
•
•
•
•
•
•
Wide Input Voltage from 2.5V to 6V
Fixed 1.4MHz Switching Frequency
High Efficiency up to 80%
PWM Brightness Control with Wide Frequency
Range of 100Hz to 200kHz
Build-In Schottky Diode
Open-LED Protection
Under-Voltage Lockout Protection
Over-Temperature Protection
<1µA Quiescent Current During Shutdown
SOT-23-6, TSOT-23-6A, and TDFN2x2-8 Packages
Halogen and Lead Free Available
(RoHS Compliant)
General Description
The APW7213/4 is a current-mode and fixed frequency
boost converter with an integrated N-FET and Schottky
diode to drive up to 8 white LEDs in series.
The series connection allows the LED current to be iden-
tical for uniform brightness. Its low on-resistance of NFET
and low feedback voltage reduce power loss and achieve
high efficiency. Fast switching frequency (1.4MHz typical)
allows using small-size inductor and both of input and
output capacitors. An over-voltage protection function,
which monitors the output voltage via VOUT pin, stops
switching of the IC if the VOUT voltage exceeds the over-
voltage threshold. An internal soft-start circuit eliminates
the inrush current during start-up.
The APW7213/4 also integrates under-voltage lockout,
over-temperature protection, and current-limit circuits to
protect the IC in abnormal conditions.The APW7213/4 is
available in a SOT-23-6, TSOT-23-6A, and TDFN2x2-8
packages.
Applications
•
•
•
•
White LED Display Backlighting
Cell Phone and Smart Phone
PND
Digital Camera
Simplified Application Circuit
V
IN
L1
22µH
(Option)
V
OUT
C2
0.22µF
Up to 8
WLEDs
C1
2.2µF
VIN
GND
EN
LX
VOUT
FB
Pin Configuration
APW7213/4
LX 1
GND 2
FB 3
6 VIN
5 VOUT
4 EN
GND
VIN
VOUT
EN
APW7213/4
APW7213/4
1
2
3
4
8
7
GND 6
5
LX
NC
FB
GND
OFF ON
R1
SOT-23-6/TSOT-23-6A
(Top View)
TDFN2x2-8
(Top View)
APW7213: VOUT OVP with hysteresis to re-start.
APW7214: VOUT OVP Latch up directly until recycle power
supply.
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
1
www.anpec.com.tw
APW7213/4
Ordering and Marking Information
APW7213/4
Assembly Material
Handling Code
Temperature Range
Package Code
APW7213/4 QB:
APW7213/4 C/CT:
W13
X
W13X
W14
X
W14X
Package Code
QB : TDFN2x2-8 C : SOT-23-6 CT : TSOT-23-6A
Operating Ambient Temperature Range
I : -40 to 85
o
C
Handling Code
TR : Tape & Reel
Assembly Material
G: Halogen and Lead Free Device
X - Date Code
X - Date Code
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which
are fully compliant with RoHS. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J-STD-020D for
MSL classification at lead-free peak reflow temperature. ANPEC defines “Green” to mean lead-free (RoHS compliant) and halogen
free (Br or Cl does not exceed 900ppm by weight in homogeneous material and total of Br and Cl does not exceed 1500ppm by
weight).
Absolute Maximum Ratings
Symbol
V
IN
VIN Supply Voltage (VIN to GND)
FB, EN to GND
V
LX
V
OUT
P
D
T
J
T
STG
T
SDR
LX to GND Voltage
VOUT to GND
Power Dissipation
Maximum Junction Temperature
Storage Temperature
(Note 1)
Rating
-0.3 ~ 7
-0.3 ~ V
IN
-0.3 ~ 41
-0.3 ~ 41
Internally Limit
150
-65 ~ 150
260
Unit
V
V
V
V
W
o
o
o
Parameter
C
C
C
Maximum Lead Soldering Temperature, 10 Seconds
Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
Thermal Characteristics
Symbol
θ
JA
Junction-to-Case Resistance
θ
JC
SOT-23-6
TSOT-23-6A
TDFN2x2-8
160
120
20
o
Parameter
Junction-to-Ambient Resistance in Free Air
(Note 2)
SOT-23-6
TSOT-23-6A
TDFN2x2-8
Typical Value
250
220
165
Unit
o
C/W
C/W
Note 2:
θ
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. The exposed pad
of package is soldered directly on the PCB.
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
2
www.anpec.com.tw
APW7213/4
Recommended Operating Conditions
(Note 3)
Symbol
V
IN
V
OUT
C
IN
C
OUT
L1
T
A
T
J
VIN Supply Voltage (VIN to GND)
VOUT to GND
Input Capacitor
Output Capacitor
Converter Output Inductor
Ambient Temperature
Junction Temperature
Parameter
Range
2.5 ~ 6
V
IN
~ 34
2.2 ~
0.22 ~
10 ~ 47
-40 ~ 85
-40 ~ 125
Unit
V
V
µF
µF
µH
o
o
C
C
Note 3: Refer to the application circuit for further information.
Electrical Characteristics
Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over V
IN
= 3.6V, T
A
= 25°C, unless
otherwise noted.
Symbol
SUPPLY CURRENT
V
IN
I
DD1
I
DD2
I
SD
UNDER-VOLTAGE LOCKOUT
UVLO Threshold Voltage
UVLO Hysteresis Voltage
REFERENCE AND OUTPUT VOLTAGE
V
REF
I
FB
Regulated Feedback Voltage
FB Input Current
V
IN
= 2.5V ~ 6V, T
A
= 25
o
C
V
IN
=2.5V~6V, T
A
=-40~85
o
C
0.185
0.18
-50
0.2
-
-
0.215
0.22
50
V
V
nA
VIN Rising
2.0
50
2.2
100
2.4
150
V
mV
Input DC Bias Current
Input Voltage Range
V
FB
= 0.4V, no switching
V
FB
= GND, switching
EN=GND
2.5
100
-
-
-
150
-
-
6
200
2.5
1
V
µA
mA
µA
Parameter
Test Conditions
Min.
APW7213/4
Typ.
Max.
Unit
INTERNAL POWER SWITCH AND SCHOTTKY DIODE
F
SW
R
ON
I
LIM
Switching Frequency
Power Switch On Resistance
Power Switch Current-Limit
LX Leakage Current
V
F
I
R
D
MAX
Schottky Diode Forward Voltage
Schottky Diode Reversed Leakage
Current
LX Maximum Duty Cycle
V
EN
= 0V, V
LX
= 0V or 6V, V
IN
= 6V
I
F
= 100mA
V
R
= 30V
V
IN
= 2.5V ~ 6V, T
A
= 25
o
C
V
IN
= 2.5V ~ 6V, T
A
= -40 ~ 85
o
C
V
IN
= 3.6V
1.2
-20
-
1.2
-1
-
-
92
1.4
-
0.45
-
-
0.7
0.2
95
1.6
20
-
-
1
-
0.5
98
MHz
%
Ω
A
µA
V
µA
%
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
3
www.anpec.com.tw
APW7213/4
Electrical Characteristics (Cont.)
Refer to figure 1 in the “Typical Application Circuits”. These specifications apply over V
IN
= 3.6V, T
A
= 25°C, unless
otherwise noted.
Symbol
Parameter
Test Conditions
Min.
OUTPUT OVER-VOLTAGE PROTECTION
Over Voltage Threshold
OVP Hysteresis
ENABLE AND SHUTDOWN
Enable Voltage Threshold
Shutdown Voltage Threshold
EN Leakage Current
OVER-TEMPERATURE PROTECTION
T
OTP
Over-Temperature Protection
(Note 4)
Over-Temperature Protection
Hysteresis
(Note 4)
T
J
Rising
T
J
Falling
-
-
150
40
-
-
o
APW7213/4
Typ.
Max.
Unit
V
OUT
Rising
APW7213 only
34
-
38
3
41
-
V
V
V
EN
Rising
V
EN
Falling
V
EN
= 0 ~ 6V, V
IN
= 6V
1
-
-100
-
-
-
-
0.4
100
V
V
nA
C
o
C
Note 4: Guaranteed by design, not production tested.
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
4
www.anpec.com.tw
APW7213/4
Typical Operating Characteristics
(Refer to the application circuit in the section "Typical Application Circuits", V
IN
=3.6V, T
A
=25
o
C, 6WLEDs unless
otherwise specified )
Efficiency vs. WLED Current
85
80
75
20
18
WLED Current vs. PWM Duty Cycle
WLED Current, I
LED
(mA)
16
14
12
10
8
6
4
2
0
100Hz
0
20
40
60
80
100
1KHz
100KHz
Efficiency (%)
70
65
60
55
50
45
40
0
5
V
IN
=3.6V
6 WLEDs
≅
19V@20mA
η=
P
OUT
/P
IN
10
15
20
WLED Current, I
LED
(mA)
PWM Duty Clcle (%)
WLED Current vs. Supply Voltage
21.0
20.8
Switch ON Resistance vs. Supply Voltage
0.7
Switch ON Resistance, R
ON
(Ω
)
WLED Current, I
LED
(mA)
20.6
20.4
20.2
20.0
19.8
19.6
19.4
19.2
19.0
2.5
3
3.5
4
4.5
5
5.5
6
0.6
0.5
0.4
0.3
0.2
0.1
2.5
3
3.5
4
4.5
5
5.5
6
Supply Voltage, V
IN
(V)
Supply Voltage, V
IN
(V)
Maximum Duty Cycle vs. Supply Voltage
100
Maximum Duty Cycle, D
MAX
(%)
90
80
70
60
50
40
2.5
3
3.5
4
4.5
5
5.5
6
Supply Voltage, V
IN
(V)
Copyright
©
ANPEC Electronics Corp.
Rev. A.1 - Mar., 2011
5
www.anpec.com.tw
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