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APW7136C Datasheet Preview

APW7136C Datasheet

Step-Up Converter

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APW7136A/B/C
1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs
Features
Wide Input Voltage from 2.7V to 6V
0.25V Reference Voltage
Fixed 1MHz Switching Frequency
High Efficiency up to 87%
www.DataSheet4U.com 100Hz to 100KHz PWM brightness control fre-
quency
Open-LED Protection
Under Voltage Lockout Protection
Over Temperature Protection
<1µA Quiescent Current during Shutdown
SOT-23-6 Package
Lead Free Available (RoHS Compliant)
Applications
White LED Display Backlighting
Cell Phone and Smart Phone
PDA, PMP, MP3
Digital Camera
Pin Configuration
SOT-23-6 Top View
LX 1
GND 2
FB 3
6 VIN
5 OVP
4 EN
General Description
The APW7136A/B/C is a current-mode and fixed frequency
boost converter with an integrated N-FET 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 N-
FET and feedback voltage reduce power loss and achieves
high efficiency. Fast 1MHz current-mode PWM operation
is available for input and output capacitors and a small
inductor while minimizing ripple on the input supply. The
OVP pin monitors the output voltage and stop switching if
exceeds the over-voltage threshold. An internal soft-start
circuit eliminates the inrush current during start-up.
The APW7136A/B/C also integrates under-voltage
lockout, over-temperature protection and current limit
circuits. The APW7136/A/B/C is available in a SOT-23-6
package.
Simplified Application Circuit
VIN
C1
4.7µF
OFF ON
L1
22µH
6 VIN
LX 1
2
GND
OVP 5
4
EN
FB 3
VOUT
C2
1µF Up to 8
WLEDs
R1
12
Ordering and Marking Information
Note: ANPEC lead-free products contain molding compounds/die attach materials and 100% matte tin plate termination finish; which are fully
compliant with RoHS and compatible with both SnPb and lead-free soldering 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.2 - Jan., 2008
1
www.anpec.com.tw




Anpec

APW7136C Datasheet Preview

APW7136C Datasheet

Step-Up Converter

No Preview Available !

APW7136A/B/C
Absolute Maximum Ratings (Note 1)
Symbol
Parameter
Rating
Unit
VIN VIN Supply Voltage (VIN to GND)
-0.3 ~ 7
V
FB, EN to GND Voltage
VLX LX to GND Voltage
-0.3 ~ VIN
-0.3 ~ 38
V
V
VOVP
TJ
www.DataSheet4U.coTmSTG
TSDR
OVP to GND Voltage
Maximum Junction Temperature
Storage Temperature Range
Maximum Lead Soldering Temperature, 10 seconds
-0.3 ~ 38
150
-65 ~ 150
260
V
°C
°C
°C
Note 1: 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 in the operational sections of the specifications is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
Thermal Characteristics (Note 2)
Symbol
Parameter
Rating
Unit
θJA Junction to Ambient Thermal Resistance
SOT-23-6
250 °C/W
Note 2: θJA 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.
Recommended Operating Conditions (Note 3)
Symbol
Parameter
VIN
VOUT
VIN Input Voltage
Converter Output Voltage
CIN Input Capacitor
COUT Output Capacitor
L1 Inductor
TA Ambient Temperature
TJ Junction Temperature
Note 3: Refer to the application circuit for further information.
Range
2.7~ 6
Up to 32
4.7 or higher
0.68 or higher
6.8 to 47
-40 to 85
-40 to 125
Unit
V
V
µF
µF
µH
°C
°C
Electrical Characteristics
(Refer to Figure 1 in the “Typical Application Circuits”. These specifications apply over VIN = 3.6V, TA = -40°C to 85°C, unless otherwise
noted. Typical values are at TA = 25°C.)
Symbol
Parameter
Test Condition
APW7136A/B/C
Min. Typ. Max.
Unit
SUPPLY VOLTAGE AND CURRENT
VIN Input Voltage Range
IDD1
IDD2 Input DC bias current
ISD
UNDER VOLTAGE LOCKOUT
TA = -40 ~ 85°C, TJ = -40 ~ 125°C
VFB = 1.3V, no switching
FB = GND, switching
EN = GND
2.7 - 6 V
70 100 130 µA
- 1 2 mA
- - 1 µA
UVLO Threshold Voltage
UVLO Hysteresis Voltage
VIN Rising
2.0 2.2 2.4
V
50 100 150 mV
Copyright © ANPEC Electronics Corp.
Rev. A.2 - Jan., 2008
2
www.anpec.com.tw



Part Number APW7136C
Description Step-Up Converter
Maker Anpec
Total Page 15 Pages
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APW7136C Datasheet PDF





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