AL3159FSG-7 Diodes Inc, AL3159FSG-7 Datasheet

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AL3159FSG-7

Manufacturer Part Number
AL3159FSG-7
Description
Charge Pumps High EFF 2.7V - 5.5V 9-Ch LED 1.2 Mhz
Manufacturer
Diodes Inc
Datasheet

Specifications of AL3159FSG-7

Output Current
270 mA
Supply Current
2 mA
Maximum Operating Temperature
+ 85 C
Package / Case
QFN-20
Input Voltage
2.7 V to 5.5 V
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Switching Frequency
1.2 MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
Description
The AL3159 is a low noise, constant frequency charge pump
DC/DC converter that uses a Dual mode load switch (1x), and (2x)
conversion for white LED applications. The AL3159 is capable of
driving nine LED channels at 20mA from a 2.7V to 5.5V input. The
current sinks may be operated using three simple logic control
inputs individually or in parallel for driving higher-current LEDs. Low
external
2.2µF capacitors at V
small, battery-powered applications.
AL3159 digital inputs are used to enable or disable the
LED channels with a fixed default current settings at 20mA or other
factory programming options available.
Each output of the AL3159 is equipped with built-in protection for
V
soft-start circuitry prevents excessive inrush current during start-up
and mode switching. A low-current shutdown feature disconnects
the load from V
The AL3159 is available in a lead-free, space-saving, thermally
enhanced 20-pin 3 x 3mm QFN package.
• V
• Up to 93% Max Power Efficiency
• 1% Current Matching Accuracy Between Channels
• Drives up to 9 configurable Channels of LEDs
• Three simple logic decoding LED On/Off control inputs
• Low transition threshold voltage typical 150 mV
• Dual-Mode 1x and 2x Charge Pump
• 1.2 MHz Constant Switching Frequency
• Soft Start for reducing inrush current
• I
• Thermally-Enhanced QFN3030-20 Package: Available in
• Lead Free Finish/ RoHS Compliant (Note 1)
Notes:
Typical Application Circuit
AL3159
Document number: DS35048 Rev. 2 - 2
OUT
“Green” Molding Compound (No Br, Sb)
V
Q
short circuit and auto-disable for LED short conditions. Built-in
IN
OUT
<1µA in Shutdown
range: 2.7V to 5.5V
short circuit and Thermal Protections
1.
part
http://www.diodes.com/products/lead_free.html
EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at
IN
counts
to reduce quiescent current less than 1µA.
IN
and V
(one
OUT
1µF
) make this part ideally suited for
flying
capacitor
and
www.diodes.com
two
1 of 10
Pin Assignments
Applications
• Mobile Phone White LED Backlighting and Indicators
• PDA White LED backlighting
• Battery-operated Phone Main and Sub Screen White LED
HIGH EFFICIENCY 1x/2x CHARGE PUMP
Backlighting
FOR WHITE LED APPLICATIONS
AL3159
© Diodes Incorporated
January 2011

Related parts for AL3159FSG-7

AL3159FSG-7 Summary of contents

Page 1

... HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS Pin Assignments capacitor and two Applications • Mobile Phone White LED Backlighting and Indicators • PDA White LED backlighting • Battery-operated Phone Main and Sub Screen White LED Backlighting www.diodes.com AL3159 January 2011 © Diodes Incorporated ...

Page 2

... OUT Current sink input #7. Connected to V OUT Exposed Pad (bottom). Connected to GND directly underneath the package www.diodes.com AL3159 when un-used. when un-used. when un-used. when un-used. when un-used. when un-used. when un-used. when un-used. when un-used. January 2011 © Diodes Incorporated ...

Page 3

... Max Unit 2.7 5.5 V -40 85 °C = 1µF Unless otherwise noted) 1 Min Typ. Max Unit 0.3 0 µ 0.5 Ω 4.5 150 mV 250 mV 100 µs 1.2 MHz 0.4 V 1.4 V 200 µs 1 µA °C 160 ° C/W January 2011 © Diodes Incorporated ...

Page 4

... AC Vout 200mV /div AC Iin 100mA /div www.diodes.com AL3159 V =3. =25° =20mA L V =3. =25°C A CTL1,2,3 I =20mA 2V/div L Vout 2V/div Cp 2V/div Iin 200mA/div Vin 200mV /div AC Vout 200mV /div AC V =3. =25° =20mA L Iin 100mA/div 1us/div January 2011 © Diodes Incorporated ...

Page 5

... Typical Performance Characteristics (Continued) AL3159 Document number: DS35048 Rev HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS V =3. =25° =20mA L Channels =25° =3.6V V =2. www.diodes.com AL3159 Channels =3. =3 CTL(H) V CTL(L) January 2011 © Diodes Incorporated ...

Page 6

... UVLO threshold. Thermal Auto Shutdown When the die temperature exceeds the thermal limit, the device will be disabled and enter stand-by mode. The operation resumes whenever the die cools off sufficiently www.diodes.com AL3159 power-up, mode switching, and January 2011 © Diodes Incorporated ...

Page 7

... Ordering Information Package FS : QFN3030-20 Device Package Code AL3159FSG-7 FS Notes: 7. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf 8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html ...

Page 8

... Pin1 (Pin #1 ID) 2X- 0. 0.40 0.595 Typ. Bottom View AL3159 Document number: DS35048 Rev HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS (All Dimensions in mm) Seating Plane 0.16/0. 0. www.diodes.com AL3159 Pad Layout Top View January 2011 © Diodes Incorporated ...

Page 9

... Taping Orientation (Note 9) Notes: 9. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf AL3159 Document number: DS35048 Rev HIGH EFFICIENCY 1x/2x CHARGE PUMP FOR WHITE LED APPLICATIONS www.diodes.com AL3159 January 2011 © Diodes Incorporated ...

Page 10

... Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. ...

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