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PDF APW7209 Data sheet ( Hoja de datos )
| Número de pieza | APW7209 | |
| Descripción | Step-Up Converter for 2 to 10 White LEDs | |
| Fabricantes | ANPEC | |
| Logotipo |  |
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APW7209
1MHz, High-Efficiency, Step-Up Converter for 2 to 10 White LEDs
Features
• Wide Input Voltage from 2.5V to 6V
• 0.3V Reference Voltage
• Fixed 1MHz Switching Frequency
• High Efficiency up to 88%
• 100Hz to 200kHz PWM Brightness Control
Frequency
• Open-LED Protection
• Under-Voltage Lockout Protection
• Over-Temperature Protection
• <1µA Quiescent Current during Shutdown
• SOT-23-6 and TSOT-23-6A Package
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
• White LED Display Backlighting
• Cell Phone and Smart Phone
• PDA, PMP, MP3
• Digital Camera
Pin Configuration
LX 1
GND 2
FB 3
6 VIN
5 OVP
4 EN
SOT-23-6/TSOT-23-6
(TopView)
General Description
The APW7209 is a current-mode and fixed frequency
boost converter with an integrated N-FET to drive up to 10
white LEDs in series.
The series connection allows the LED current to be iden-
tical for uniform brightness. Its low on-resistance of N-
FET and low feedback voltage reduce power loss and
achieve high efficiency. Fast switching frequency(1MHz
typical) allows using small-size inductor and both of in-
put and output capacitors. An over-voltage protection
function, which monitors the output voltage via OVP pin,
stops switching of the IC if the OVP voltage exceeds the
over voltage threshold. An internal soft-start circuit elimi-
nates the inrush current during start-up.
The APW7209 also integrates under-voltage lockout, over-
temperature protection, and current limit circuits to pro-
tect the IC in abnormal conditions.The APW7209 is avail-
able in a SOT-23-6 and TSOT-23-6 package.
Simplified Application Circuit
VIN
C1
4.7µF
OFF ON
L1
22µH
6 VIN
LX 1
2 GND OVP 5
APW7209
4 EN
FB 3
VOUT
C2
1µF Up to 10
WLEDs
R1
15Ω
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.8 - Sep., 2013
1
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
1 page  
APW7209
Operating Waveforms
(Refer to the application circuit in the section “Typical Application Circuits”, VIN=3.6V, TA=25oC, 10WLEDs unless otherwise
specified )
VEN
VOUT, 10V/Div
IIN, 0.2A/Div
10WLEDs, L=22µH, VIN=3.6V, ILED=20mA
VLX, 20V/Div, DC
VOUT, 100mV/Div, AC
IL, 0.2A/Div
10WLEDs, L=22µH, VIN=3.6V, ILED=20mA
VOUT, 10V/Div
Copyright © ANPEC Electronics Corp.
Rev. A.8 - Sep., 2013
5
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
5 Page 
APW7209
Package Information
SOT-23-6
D
e
SEE
VIEW A
b
e1
c
L
VIEW A
GAUGE PLANE
SEATING PLANE
S SOT-23-6
Y
M
B
MILLIMETERS
INCHES
O
L
MIN.
MAX.
MIN.
MAX.
A 1.45
0.057
A1 0.00
0.15
0.000
0.006
A2 0.90
1.30
0.035
0.051
b 0.30
0.50
0.012
0.020
c 0.08
0.22
0.003
0.009
D 2.70
3.10
E 2.60
3.00
E1 1.40
1.80
e 0.95 BSC
0.106
0.122
0.102
0.118
0.055
0.071
0.037 BSC
e1 1.90 BSC
L 0.30
0.60
0 0°
8°
0.075 BSC
0.012
0.024
0° 8°
Note : 1. Follow JEDEC TO-178 AB.
2. Dimension D and E1 do not include mold flash, protrusions or
gate burrs. Mold flash, protrusion or gate burrs shall not exceed
10 mil per side.
Copyright © ANPEC Electronics Corp.
Rev. A.8 - Sep., 2013
11
www.anpec.com.tw
Free Datasheet http://www.datasheetlist.com/
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet APW7209.PDF ] | |
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