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ANPEC

APW7236 Datasheet Preview

APW7236 Datasheet

Step-Up Converter

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APW7236
1.5MHz Step-Up Converter for White LEDs
Features
General Description
Wide Input Voltage from 2.7V to 6V
Fixed 1.5MHz Switching Frequency
Reference Voltage : 0.2V
PWM Brightness Control with Wide Frequency
Range of 100Hz to 100kHz
Build-In Power MOSFET : 0.2
Open-LED Protection
Under-Voltage Lockout Protection
Over-Temperature Protection
<1µA Quiescent Current during Shutdown
TSOT-23-6A and TDFN2x2-8 Package
Halogen and Lead Free Available
(RoHS Compliant)
Applications
The APW7236 is a current-mode and fixed frequency
boost converter with an integrated N-FET to drive white
LEDs.
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(1.5MHz typical)
allows using small-size inductor and both of input 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 eliminates
the inrush current during start-up.
The APW7236 also integrates under-voltage lockout, over-
temperature protection, and current limit circuits to pro-
tect the IC in abnormal conditions. The APW7236 is avail-
able in a TSOT-23-6A and TDFN2x2-8 package.
White LED Display Backlighting
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Simplified Application Circuit
Pin Configuration
TSOT-23-6A
Top View
LX 1
GND 2
FB 3
6 VIN
5 OVP
4 EN
VIN
C1
4.7µF
OFF ON
L1
4.7µH
VIN LX
GND
OVP
EN FB
ILED
VOUT
C2
µF
7~9 strings
R1
TDFN2x2-8
(Top View)
GND 1
VIN 2
OVP 3
EN 4
GND
8 LX
7 NC
6 FB
5 GND
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.4 - Sep., 2012
1
www.anpec.com.tw




ANPEC

APW7236 Datasheet Preview

APW7236 Datasheet

Step-Up Converter

No Preview Available !

APW7236
Ordering and Marking Information
Assembly Material
G : Halogen and Lead Free Device
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 (Note 1)
Symbol
VIN
VLX
VOVP
PD
TJ
TSTG
TSDR
Parameter
VIN Supply Voltage (VIN to GND)
FB, EN to GND
LX to GND Voltage
OVP to GND
Power Dissipation
Maximum Junction Temperature
Storage Temperature
Maximum Lead Soldering Temperature, 10 Seconds
Rating
-0.3 ~ 7
-0.3 ~ VIN
-0.3 ~ 27.5
-0.3 ~ 27.5
Internally Limit
150
-65 ~ 150
260
Unit
V
V
V
V
W
oC
oC
oC
Note1: Stresses beyond 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 "recom-
mended operating conditions" is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device
reliability
Thermal Characteristics
Symbol
θJA
Parameter
Junction-to-Ambient Resistance in Free Air (Note 2)
TSOT-23-6A
TDFN2x2-6
Typical Value
220
165
Junction-to-Case Resistance
θJC
TSOT-23-6A
TDFN2x2-6
120
20
Note 2: θJA is measured with the component mounted on a high effective thermal conductivity test board in free air.
Unit
oC/W
oC/W
Copyright © ANPEC Electronics Corp.
Rev. A.4 - Sep., 2012
2
www.anpec.com.tw


Part Number APW7236
Description Step-Up Converter
Maker ANPEC
Total Page 17 Pages
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