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PDF APW7071 Data sheet ( Hoja de datos )
| Número de pieza | APW7071 | |
| Descripción | White LED DC/DC Step-Up Converter | |
| Fabricantes | Anpec Electronics Coropration | |
| Logotipo |  |
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APW7071
White LED DC/DC Step-Up Converter
Features
General Description
• 2.4V to 6V Input Voltage Range
• 400mA, Internal Switch Current
www.DataSheet4U• .comUp to 1MHz Switching Frequency
• 70µA Typical No Load Quiescent Current
• 0.1µA Typical Shutdown Current
• Internal Soft-start
• Available in a Tiny 6-Pin SOT-23 Package
• Up to 87% efficiency
• Operating Output Capacitor down to 0.1µF
• Over Voltage Protection included
• Lead Free Available (RoHS Compliant)
Applications
• Cellar Phones White LED Back Light
• PDAs, Handheld Computers
• Digital Still Cameras
• MP3 Players
• GPS Receivers
The APW7071 is a high frequency step up DC/DC
converter in a small 6 leads SOT-23 package spe-
cially designed to drive white LEDs with a constant
current. The device can drive up to 4 LEDS in a series
from one Li-Ion cell. The APW7071 is ideal for LCD
panels requiring low current and high efficiency as well
as white LED applications for cellular phone back-
lighting.
Package Pin Out
VIN OVP SHDN
6 54
123
SW GND FB
SOT-23-6 (Top View)
APW7071
Ordering and Marking Information
APW7071
Lead Free Code
Handling Code
Temp. Range
Package Code
Package Code
C : SOT-23-6
Operating Junction Temp. Range
E : -40 to 85°C
Handling Code
TU : Tube
TR : Tape & Reel
Lead Free Code
L : Lead Free Device Blank : Original Device
APW7071 C :
W71X
XXXXX - Date Code
Notes: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte in plate
termination finish; which are fully compliant with RoHS and compatible with both SnPb and lead-free soldiering
operations. ANPEC lead-free products meet or exceed the lead-free requirements of IPC/JEDEC J STD-020C for
MSL classification at lead-free peak reflow temperature.
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 - Feb., 2006
1
www.anpec.com.tw
1 page  
APW7071
Typical Characteristics
(Circuit of Figure 1, VIN = 3.3V, ILED = 15mA, L1 = 4.7µH, CIN = 4.7µF, COUT = 0.1µF,4 LEDs,
TA = +25°C, unless otherwise noted.)
Efficiency vs LED Current
www.DataSheet4U.com90
88
86
84
82
80
78
76
74
0.1
Vin=4.2V
Vin=3.6V
Vin=2.7V
1 10
LED Current(mA)
100
Efficiency vs Supply Voltage
90
88
86
84
82
80
78
76
74
ILED=15mA
72
70
23456
Supply Voltage(V)
Switch Rds,on vs Supply Voltage
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2
Ta=25°C
345
Supply Voltage(V)
6
Switch Rds,on vs Temperature
0.6
0.5
0.4
0.3
0.2
0.1
0
-40 -20
Vin=3.3V
0 20 40 60 80 100
Temperature(°C)
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Feb., 2006
5
www.anpec.com.tw
5 Page 
APW7071
Application Information (Cont.)
Layout considerations (Conts.)()
pin to minimize the noise coupling into other circuits.
Since the feedback pin and network is a high imped-
ance circuit, the feedback network should be routed
www.DataSheet4U.com
away from the inductor. The feedback pin and feed-
back network should be shielded with a ground plane
or trace to minimize noise coupling into this circuit.
Copyright © ANPEC Electronics Corp.
Rev. A.1 - Feb., 2006
11
www.anpec.com.tw
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet APW7071.PDF ] | |
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