AAT3129 SKYWORKS | Alldatasheet

Document overview

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  • PDF pages: 16

Technical content

Features

  • V IN Range: 2.7V to 5.5V
  • Common Anode RGB LED Control
  • 4096 Color with Single Wire Digital Control
  • 40mA to 180mA Fixed Current Source
  • AS 2Cwire Digital Brightness Control
  • Low Noise Constant Frequency Operation
  • Small Application Circuit
  • Regulated Output Current
  • No Inductors
  • 1MHz Switching Frequency
  • I Q <1μA in Shutdown
  • 12-Pin TSOPJW Package

Applications

  • Fashion RGBs
  • Mobile Handsets
  • MP3 Players
  • PDAs
  • Portable Devices
  • RGB Color LEDs
  • RGB Photo Flash
  • Smartphones Typical Application 1µFVBAT 1µF 1µF 1µF VIN CP C1+ C1- C2+ C2- DR DG DBEN/SETEN/SET GND AAT3129 GR B ISRC

Figure 1. Typical Application Circuit.

1 C2+ Flying capacitor 2 positive terminal. Connect a 1 μF capacitor between C2+ and C2-. 2 CP Charge pump output. Requires 1 μF capacitor connected between this pin and ground. 3 C1- Flying capacitor 1 negative terminal. 4 C1+ Flying capacitor 1 positive terminal. Connect a 1 μF capacitor between C1+ and C1-. 5 ISRC Current source output.

6 EN/SET AS

7 DB Open drain switch blue diode cathode. 8 DG Open drain switch green diode cathode. 9 DR Open drain switch red diode cathode. 11 IN Input power supply. Requires 1 μF capacitor connected between this pin and ground. 12 C2- Flying capacitor 2 negative terminal. Figure 2. AAT3129 Pinout − 12-Pin TSOPJW

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February , 2013 1. Stresses above those listed in Absolute Maximum Ratings may cause permanent damage to the device. Functional operation at co nditions other than the operating conditions specified is not implied. Only one Absolute Maximum Rating should be applied at any one time. 2. Mounted on an FR4 board. 3. Derate 6.25mW/°C above 25°C. Absolute Maximum Ratings1 Symbol Description Value Units VIN Input Voltage -0.3 to 6 V VCP Charge Pump Output -0.3 to 6 V VEN/SET EN/SET to GND Voltage -0.3 to 6 V VEN/SET(MAX) Maximum EN/SET to Input Voltage 0.3 V TJ Operating Junction Temperature Range -40 to 150 °C TLEAD Maximum Soldering Temperature (at leads, 10 sec) 300 °C Thermal Information Symbol Description Value Units PD Maximum Power Dissipation2, 3 625 mW JA Thermal Resistance 160 °C/W

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 1. The AAT3129 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured by design, characterization, and correla- tion with statistical process controls. Electrical Characteristics1 VIN = 3.5V, C3 = C4 = C1 = C2 = 1 μF; TA = -40°C to +85°C. Unless otherwise noted, typical values are T A = 25°C. Symbol Description Conditions Min Typ Max Units Input Power Supply VIN Operation Range 2.7 5.5 V ICC Operating Current 3.0 ≤ VIN ≤ 5.5, CP = 1.5X, No Load Current 1 3 mA ISHDN Shutdown Current EN = 0 1 μA ISRC Output Current Accuracy 3.0 ≤ VIN ≤ 5.5 -5 5 % Charge Pump TS Start-Up Delay Time 200 μs FCLK Clock Frequency 1 MHz  Effi ciency V IN = 3.5V 93 % Switches RDS(ON) Switch On Resistance V IN = 3.5V, TA = 25°C 1.5  EN/SET VEN(L) Enable Threshold Low V IN = 2.7V 0.4 V VEN(H) Enable Threshold High V IN = 5.5V 1.4 V TEN/SET LO EN/SET Low Time 0.3 75 μs TEN/SET HI MIN Minimum EN/SET High Time 50 ns TOFF EN/SET Off Timeout 500 μs TLAT EN/SET Latch Timeout 500 μs IEN/SET EN/SET Input Leakage V EN/SET = 5.5V, VIN = 5.5V -1 1 μA

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February , 2013 Typical Characteristics Turn-On to 1X Mode (VIN = 4.2V; ISRC = 60mA) 100μμs/div EN/SET (2V/div) CP (2V/div) IISRC (50mA/div) Turn-On to 1.5X Mode (VIN = 3.6V; ISRC = 60mA) 100μμs/div EN/SET (2V/div) CP (2V/div) IISRC (50mA/div) Turn-On to 2X Mode (VIN = 2.8V; ISRC = 60mA) 100μμs/div EN/SET (2V/div) CP (2V/div) IISRC (50mA/div) Turn-Off from 1.5X Mode (VIN = 3.6V; Addr = 2; Data = 16) 100μμs/div EN/SET (2V/div) IISRC (50mA/div) VISRC (2V/div)

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 Typical Characteristics Operating Characteristics (VIN = 4.2V; DR, DB, and DG in 1X Mode) 100μμs/div CP (1V/div) IISRC (50mA/div) VISRC (1V/div) 4.1V Operating Characteristics (VIN = 3.9V; DR and DG in 1X Mode; DB in 1.5X Mode) 100μμs/div CP (1V/div) IISRC (50mA/div) VISRC (1V/div) 5.2V 3.8V Operating Characteristics (VIN = 3.6V; DR in 1X Mode; DG and DB in 1.5X Mode) 100μμs/div CP (1V/div) IISRC (50mA/div) VISRC (1V/div) 5.3V 3.5V Line Response (1X Mode; IISRC = 60mA) 1ms/div VIN (1V/div) VCP (1V/div) IISRC (50mA/div) VISRC (1V/div) 3.7V 4.2V Line Response (1X, 1.5X Mode; IISRC = 60mA) 1ms/div VIN (1V/div) VCP (1V/div) IISRC (50mA/div) VISRC (1V/div) 3.5V 3.9V

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February , 2013 Typical Characteristics Oscillator Frequency vs. Temperature Temperature (°°C) FOSC (MHz) 0.5 0.6 0.7 0.8 0.9 1.1 1.2 1.3 1.4 1.5 -40 -20 0 20 40 60 80 100 Shutdown Current vs. Temperature Temperature (°°C) Shutdown Current (μA) 0.001 0.01 0.1 -40 -20 0 20 40 60 80 100 IISRC vs. VIN (VF = 3.5V) VIN (V) IISRC (mA) +25°C +85°C -40°C IISRC vs. VF (VIN = 3.5V) VF (V) IISRC (mA) +25°C +85°C -40°C TLAT vs. VIN Input Voltage (V) TLAT (μμs) 100 150 200 250 300 350 400 450 -40°C +25°C +85°C TOFF vs. VIN Input Voltage (V) TOFF (μμs) 100 150 200 250 300 350 -40°C +25°C +85°C

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 Typical Characteristics Switch Resistance vs. Supply Voltage Supply Voltage (V) Switch Resistance (ΩΩ) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 +85°C +25°C -40°C VIH vs. VIN Input Voltage (V) VIH (mV) 550 600 650 700 750 800 850 900 950 1000 1050 -40°C +25°C +85°C VIL vs. VIN Input Voltage (V) VIL (mV) 550 600 650 700 750 800 850 900 950 1000 1050 -40°C +25°C +85°C

matically transition to 2X mode. timing in the following section for details. Figure 3. AAT3129 Functional Block Diagram.

Figure 5. Diode Current Timing.

1 R, G, B, T Registers Latched Independently

2 R, G, B Registers Synchronized to T Register Latch

Table 2. Mode Register Settings. the on-time for each color channel during a PWM cycle. level is set by programming the T register with 1 edge. the T register is written (synchronized updating). only be achieved serially, or one color at a time.

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 LED Current The resulting DC current for each of the R, G, and B channels depends on the overall system settings. Using the overall settings, the current for a particular channel is calculated as R - 1 4 · (T - 1) + (R - 1) + (G - 1) + (B - 1) + CHLS_ONIR = ISRC · G - 1 4 · (T - 1) + (R - 1) + (G - 1) + (B - 1) + CHLS_ONIG = ISRC · B - 1 4 · (T - 1) + (R - 1) + (G - 1) + (B - 1) + CHLS_ONIB = ISRC · where ISRC is the factory programmed current and CHLS_ ON is the number of channels programmed to operate. Whenever a channel is programmed to Data = 1, that channel is programmed to off and must be removed from the CHLS_ON count. Capacitor Selection Careful selection of the four external capacitors C1, C2, C3, and C4 is important because they will affect turn-on time, output ripple, and transient performance. Optimum performance will be obtained when low equivalent series resistance (ESR) ceramic capacitors are used. In gener- al, low ESR may be defined as less than 100m. For best overall performance, 1 μF capacitors are recommended. Depending on ripple requirements, the input and output capacitor values can be increased or decreased accord- ingly. If lower ripple is desired, increase the capacitor value. The peak-to-peak ripple seen at the input or out- put increases or decreases with capacitor size. Capacitor Characteristics Ceramic composition capacitors are highly recommended over all other types of capacitors for use with the AAT3129. Ceramic capacitors offer many advantages over their tantalum and aluminum electrolytic counter- parts. A ceramic capacitor typically has very low ESR, is lowest cost, has a smaller PCB footprint, and is non- polarized. Low ESR ceramic capacitors help maximize charge pump transient response. Since ceramic capaci- tors are non-polarized, they are not prone to incorrect connection damage. Equivalent Series Resistance ESR is an important characteristic to consider when selecting a capacitor. ESR is a resistance internal to a capacitor that is caused by the leads, internal connec- tions, size or area, material composition, and ambient temperature. Capacitor ESR is typically measured in mil- liohms for ceramic capacitors and can range to more than several ohms for tantalum or aluminum electrolytic capacitors. Ceramic Capacitor Materials Ceramic capacitors less than 0.1 μF are typically made from NPO or C0G materials. NPO and C0G materials typically have tight tolerance and are stable over tem- perature. Larger capacitor values are typically composed of X7R, X5R, Z5U, or Y5V dielectric materials. Large ceramic capacitors, typically greater than 2.2 μF, are often available in low-cost Y5V and Z5U dielectrics, but capacitors greater than 1μF are typically not required for AAT3129 applications. Capacitor area is another contributor to ESR. Capacitors that are physically large will have a lower ESR when compared to a smaller capacitor made from an equiva- lent material. These larger devices can improve circuit transient response when compared to an equal value capacitor in a smaller package size. Layout Considerations The AAT3129 is a high-performance device that operates with a high switching frequency. To ensure optimal device performance and accommodate the fast tran- sients generated by the AAT3129 special attention should be given to the board layout. The recommended layout is illustrated in Figure 1. The traces connecting C1 and C2 experience fast current transients. As a result, the trace lengths for C1 and C2 should be minimized by placing the components as closely as possible to the IC. This will minimize path resistance and reduce ringing due to the inductance associated with trace length. For best IC performance, C4 and C3 are placed as closely as possible to the IN and CP pins and are connected to a solid ground.

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February , 2013 AAT3129 Evaluation Board

Description

A schematic of the complete circuit is shown in Figure 6. The evaluation board layout details are provided in Figures 7 and 8. Figure 6: AAT3129 Evaluation Board Schematic. LED7 (red) 10µF 330 GP34 GP43 GP52 Vss 8 GP2 5GP1 6GP0 7Vdd1 PIC12F675 C2+ C2- CP2 C1-3 C1+4 ISRC5 EN/SET 6 DR 7 DG 8 DB 9 GND IN 11 AAT3129 1 µF 1 µF 1µF C3 1 µF 100K B OP1 G R OP2 B G R Header 3 220 100K 330 LED0 (Green) Header 3 DC+ DC- JP1 JPR JPG 0 JPB

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 Figure 7: AAT3129 Evaluation Board Figure 8: AAT3129 Evaluation Board Component Side PCB Layout. Solder Side PCB Layout.

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February , 2013

Ordering Information

Output Current Package Marking 1 Part Number (Tape and Reel)2 60mA TSOPJW-12 NNXYY AAT3129ITP-60-T1 Skyworks Green™ products are compliant with all applicable legislation and are halogen-free. For additional information, refer to Skyworks Definition of Green™ , document number SQ04-0074.

Package Information

0.20 + 0.10 - 0.05 0.055 ± 0.045 0.45 ± 0.15 7° NOM 4° ± 4° 3.00 ± 0.10 2.40 ± 0.10 2.85 ± 0.20 0.15 ± 0.05 0.9625 ± 0.0375 1.00 + 0.10 - 0.065

0.04 REF

0.010 2.75 ± 0.25 All dimensions in millimeters. 1. XYY = assembly and date code. 2. Sample stock is held on part numbers listed in BOLD.

High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications Skyworks Solutions, Inc. • Phone [781] 376-3000 • Fax [781] 376-3100 • sales@skyworksinc.com • www.skyworksinc.com 202264B • Skyworks Proprietary Information • Products and Product Information are Subject to Change Without Notice. • February 21, 2013 Copyright © 2012, 2013 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 fo r errors or omissions in these materials or the information contained herein. Sky- works may change its documentation, products, services, specifi cations 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 confl icts, incompatibilities, or other diffi culties 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 here- under, 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, IN- CLUDING 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 en- vironmental 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 specifi cations as a result of design defects, errors, or operation of products outside of pub- lished parameters or design specifi cations. 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 specifi cations or parameters. Skyworks, the Skyworks symbol, and “Breakthrough Simplicity” are trademarks or registered trademarks of Skyworks Solutions, Inc., in the United States and other countries. Third-party brands and names are for identifi cation 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.