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APW7207A fiches techniques PDF

ANPEC - Step-Up Converter

Numéro de référence APW7207A
Description Step-Up Converter
Fabricant ANPEC 
Logo ANPEC 





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APW7207A fiche technique
APW7207/A
1MHz, High-Efficiency, Step-Up Converter for White LEDs
Features
General Description
Wide Input Voltage from 2.5V to 6V
The APW7207/A is a current-mode and fixed frequency
0.2V Reference Voltage
Fixed 1MHz Switching 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-
High Efficiency up to 88%
tical for uniform brightness. Its low on-resistance of N-
100Hz to 200kHz PWM Brightness Control Fre- FET and feedback voltage reduces power loss and
achieves high efficiency. Fast 1MHz current-mode PWM
quency
operation is available for input and output capacitors and
Open-LED Protection
a small inductor while minimizing ripple on the input
Under-Voltage Lockout Protection
Over-Temperature Protection
supply. The OVP pin monitors the output voltage and stops
switching if exceeds the over-voltage threshold. An inter-
nal soft-start circuit eliminates the inrush current during
<1µA Quiescent Current During Shutdown
start-up.
TSOT-23-6A and TDFN2x2-8 Packages
Lead Free and Green Devices Available
The APW7207/A also integrates under-voltage lockout,
over-temperature protection, and current limit circuits.
The APW7207/A is available in TSOT-23-6A and TDFN2x2-
(RoHS Compliant)
8 packages.
Applications
Pin Configuration
White LED Display Backlighting
Cell Phone and Smart Phone
PDA, PMP, and MP3
Digital Camera
Simplified Application Circuit
VIN
C1
2.2µF
OFF ON
L1
22µH
VIN LX
GND OVP
EN FB
VOUT
C2
1µF Up tp 10
WLEDs
R1
10
LX 1
GND 2
FB 3
6 VIN
5 OVP
4 EN
TSOT-23-6A
(Top View)
GND 1
VIN 2
OVP 3
EN 4
8 LX
7 NC
6 GND
5 FB
TDFN 2x2-8
Top View
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.7 - Nov., 2012
1
www.anpec.com.tw

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