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SKY81299-22

器件型号:SKY81299-22
厂商名称:Skyworks
厂商官网:http://www.skyworksinc.com
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器件描述

2.4 A Two-Channel Flash LED Driver with Control Interface

SKY81299-22器件文档内容

PRODUCT SUMMARY

SKY81299: 2.4 A Two-Channel Flash LED Driver
with I2C Control Interface

Applications                                               Description

LED photo flash with Movie/Torch mode                     The SKY81299 is a high-efficiency, 2.4 A high-current boost
                                                           converter with two independently programmable constant current
Dual LED flash with color compensation                    outputs. The device is intended for LED photo flash/facial
                                                           recognition and "selfie" front-facing camera flash applications in
"Selfie" flash for front-facing camera (PIP enabled)      all single-cell Li-ion powered portable products.

Smartphones/tablets                                       The SKY81299 maintains the flash LED output current using a
                                                           DC-DC step-up converter with a bypass function to maximize
Features                                                   efficiency under all load conditions. The flash current for each
                                                           channel can be programmed up to 1.5 A at 12 mA step. The
Input voltage range: 2.5 V to 5.5 V                       device uses a common cathode (current source) topology to allow
                                                           a direct flash LED cathode connection to the ground plane which
Each channel can program to 1.5 A with 12 mA programming  facilitates LED heat dissipation. The total combined output current
  step size; up to 2.4 A total combined output current     for flash outputs is 2.4 A.

> 90% LED efficiency at 250 mA                            The high-frequency 2.75 MHz DC-DC boost switching frequency
        (3.3 V < VIN < 3.6 V, VF = 3.3 V);                 allows the use of a small external inductor and output capacitor,
                                                           which makes the SKY81299 ideally suited for small battery-
  > 85% LED efficiency at 1 A                              powered applications. A startup control circuit automatically
        (3.4 V< VIN < 3.9 V, VF = 3.3 V)                   senses the flash LED forward voltage at any programmed output
                                                           current setting and determines the most efficient operation mode.
2.75 MHz switching frequency
                                                           An industry standard I2C digital interface is used to program the
Soft-start and input current limit                        SKY81299 LED Flash and Movie modes. Device operations are
                                                           fully configurable; Movie and Flash current level, current limits,
Separate flash enable/flash inhibit                       and fault reporting are managed through I2C. Also included are
                                                           separate flash enable inputs to initiate the flash operation and a
Programmable blinking LED notification                    flash inhibit input either to reduce the flash current to Movie-
Industry standard 1 MHz I2C programming                   mode levels or to shut off the flash current during high battery
                                                           demand conditions.
   Flash and Movie mode current
   Input voltage monitor with programmable thresholds      The SKY81299 is available in a small 1.903  1.903  0.605 mm,
   Current read-back in input voltage monitor operation    16-bump Wafer-Level Chip Scale (WLCSP) package.
   Programmable safety timer
   Fault read back                                         A typical application circuit is shown in Figure 1.

Fault protection                                                          Skyworks GreenTM products are compliant with
   Integrated safety timer                                                 all applicable legislation and are halogen-free.
   Over-voltage (open LED, open circuit)                                   For additional information, refer to Skyworks
   Short circuit                                                           Definition of GreenTM, document number
   Over-temperature protection                                             SQ040074.
   Flash mode input voltage monitor
   Open-drain fault output

-40 C to +85 C temperature range

Small WLCSP (16-bump, 1.903  1.903  0.605 mm, 0.4 mm
  pitch) package (MSL1, 260 C per JEDEC J-STD-020)

Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com

203795A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 8, 2015  1
PRODUCT SUMMARY SKY81299: 2.4 A TWO-CHANNEL FLASH LED DRIVER WITH I2C CONTROL INTERFACE

                                      L1
                                    1.0 H

   VIN = 2.5 to 5.5 V               IN      SW

                               CIN
                           2.2 F

          Device Enable             EN            OUT

   I2C Serial Data Input            SDA                COUT
   I2C Serial Clock Input           SCL SKY81299       4.7 F

          Flash 1 Enable            FLEN 1        FL1
          Flash 2 Enable
                                    FLEN 2        FL2
            Flash Inhibit
                                    FLINH
                                                                                                 White Flash LED
                                                                                    White/Amber
                                                                                    Flash LED                t0680

                                        GND PGND

                                    Figure 1. SKY81299 Typical Application Circuit

   Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com

2  August 8, 2015 Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice 203795A
                        PRODUCT SUMMARY SKY81299: 2.4 A TWO-CHANNEL FLASH LED DRIVER WITH I2C CONTROL INTERFACE

Ordering Information    Total Output Current  With VIN Monitor Function  With Blinking Function  Manufacturing Part Number
                                 2.4 A                     Yes                      Yes          SKY81299-11-001
            Model Name           2.4 A                     Yes                       No          SKY81299-12-001
  SKY81299-11                    2.4 A                      No                      Yes          SKY81299-13-001
  SKY81299-12                    2.4 A                      No                       No          SKY81299-14-001
  SKY81299-13                     2A                       Yes                      Yes          SKY81299-21-001
  SKY81299-14                     2A                       Yes                       No          SKY81299-22-001
  SKY81299-21                     2A                        No                      Yes          SKY81299-23-001
  SKY81299-22                     2A                        No                       No          SKY81299-24-001
  SKY81299-23
  SKY81299-24

Copyright 2015 Skyworks Solutions, Inc. All Rights Reserved.

Information in this document is provided in connection with Skyworks Solutions, Inc. ("Skyworks") products or services. These materials, including the information contained herein, are provided by
Skyworks as a service to its customers and may be used for informational purposes only by the customer. Skyworks assumes no responsibility for errors or omissions in these materials or the
information contained herein. Skyworks may change its documentation, products, services, specifications or product descriptions at any time, without notice. Skyworks makes no commitment to
update the materials or information and shall have no responsibility whatsoever for conflicts, incompatibilities, or other difficulties arising from any future changes.

No license, whether express, implied, by estoppel or otherwise, is granted to any intellectual property rights by this document. Skyworks assumes no liability for any materials, products or
information provided hereunder, including the sale, distribution, reproduction or use of Skyworks products, information or materials, except as may be provided in Skyworks Terms and Conditions of
Sale.

THE MATERIALS, PRODUCTS AND INFORMATION ARE PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE, INCLUDING FITNESS FOR A
PARTICULAR PURPOSE OR USE, MERCHANTABILITY, PERFORMANCE, QUALITY OR NON-INFRINGEMENT OF ANY INTELLECTUAL PROPERTY RIGHT; ALL SUCH WARRANTIES ARE HEREBY EXPRESSLY
DISCLAIMED. SKYWORKS DOES NOT WARRANT THE ACCURACY OR COMPLETENESS OF THE INFORMATION, TEXT, GRAPHICS OR OTHER ITEMS CONTAINED WITHIN THESE MATERIALS. SKYWORKS
SHALL NOT BE LIABLE FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO ANY SPECIAL, INDIRECT, INCIDENTAL, STATUTORY, OR CONSEQUENTIAL DAMAGES, INCLUDING WITHOUT LIMITATION,
LOST REVENUES OR LOST PROFITS THAT MAY RESULT FROM THE USE OF THE MATERIALS OR INFORMATION, WHETHER OR NOT THE RECIPIENT OF MATERIALS HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.

Skyworks products are not intended for use in medical, lifesaving or life-sustaining applications, or other equipment in which the failure of the Skyworks products could lead to personal injury,
death, physical or environmental damage. Skyworks customers using or selling Skyworks products for use in such applications do so at their own risk and agree to fully indemnify Skyworks for any
damages resulting from such improper use or sale.

Customers are responsible for their products and applications using Skyworks products, which may deviate from published specifications as a result of design defects, errors, or operation of
products outside of published parameters or design specifications. Customers should include design and operating safeguards to minimize these and other risks. Skyworks assumes no liability for
applications assistance, customer product design, or damage to any equipment resulting from the use of Skyworks products outside of stated published specifications or parameters.

Skyworks and the Skyworks symbol are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for
identification purposes only, and are the property of their respective owners. Additional information, including relevant terms and conditions, posted at www.skyworksinc.com, are incorporated by
reference.

Skyworks Solutions, Inc. Phone [781] 376-3000 Fax [781] 376-3100 sales@skyworksinc.com www.skyworksinc.com

203795A Skyworks Proprietary Information Products and Product Information are Subject to Change Without Notice December 8, 2015  3
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