PDF AS3665 Data sheet ( Hoja de datos )

Número de pieza	AS3665
Descripción	9 Channel Advanced Command Driven RGB/White LED Driver
Fabricantes	austria microsystems
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No Preview Available ! austriamicrosystems AG is now ams AG The technical content of this austriamicrosystems datasheet is still valid. Contact information: Headquarters: ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 e-Mail: [email protected] Please visit our website at www.ams.com Free Datasheet http://www.datasheet4u.com/ 1 page AS3665 Datasheet, Confidential - Absolute Maximum Ratings Pin Description 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 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 Table 3, “Electrical Characteristics,” on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter Min Max Units Comments VBAT, VCP, C1+, C1-, C2+, C2- to GND VCP to VBAT -0.3 +7.0 -0.3 V V Note: Diode between VCP and VBAT LED1, LED2...LED9 to GND VCP + -0.3 0.3 7.0 V SDA, SCL, EN, CLK32K, TRIG, INT/AUDIO_IN, GPO, ADDR, C2V5 to GND -0.3 Input Pin Current without causing latchup -100 Continuous Power Dissipation (TA = +70ºC) Continuous power dissipation Continuous power dissipation derating factor Electrostatic Discharge ESD HBM ESD CDM ESD MM Temperature Ranges and Storage Conditions Junction Temperature Storage Temperature Range Humidity Body Temperature during Soldering -55 5 VBAT + 0.3 7.0 +100 +IIN V mA Norm: EIA/JESD78 0.78 mW 14.2 mW/ºC PT1 PDERATE2 ±1000 ±500 ±200 V Norm: JEDEC JESD22-A114F V Norm: JEDEC JESD 22-C101C V Norm: JEDEC JESD 22-A115-A level A +150 +125 85 +260 ºC Internally limited (overtemperature protection) ºC % Non condensing ºC according to IPC/JEDEC J-STD-020C 1. Depending on actual PCB layout and PCB used 2. PDERATE derating factor changes the total continuous power dissipation (PT) if the ambient temperature is not 70ºC. Therefore for e.g. TAMB=85ºC calculate PT at 85ºC = PT - PDERATE * (85ºC - 70ºC) www.austriamicrosystems.com Revision 1.0.2 4 - 77 Free Datasheet http://www.datasheet4u.com/ 5 Page AS3665 Datasheet, Confidential - Detailed Description Timing Diagrams 8 Detailed Description The AS3665 is a fixed frequency charge pump. Its output (VOUT) is connected to nine current sources (LED1..LED9). A sophisticated command based pattern generator with three sequencers controls the nine PWM generators (12 bit resolution), which are connected to the current sources. Commands are downloaded to the AS3665 internal memory space and can be executed autonomously in the three sequencers. The commands are optimized for lighting applications (e.g. a single command executes logarithmic up dimming). It supports command flow control (like unconditional and conditional jumps). Variables which are accessible through the I2C interface allow control of the program execution by the I2C interface and communication between the three sequencers. The three sequencers can be dynamically assigned to any of the nine outputs (under program control). The AS3665 supports an audio input pin INT/AUDIO_IN which allows the control of patterns depending on an audio input signal. This audio input can be feed through internal digital filters for better visual appearance. If the audio feature is not used, the pin INT/AUDIO_IN can be used as interrupt output1 to send interrupts. The AS3665 is controlled by an I2C interface and additional dedicated control lines. An EN input operates as a global enable/disable pin and with the pin TRIG several AS3665 can be synchronized in a system. A separate CLK32K input can be used to set an exact clock input frequency (all internal timings can be derived either from CLK32K or an internal oscillator). The I2C address is selectable by the pin ADDR - see I2C Address selection on page 40. A GPO pin can be used for external control or as an additional ADC input. The AS3665 supports LED testing (verification of the performance of the connected LEDs in an assembled system). Following blocks are included inside the AS3665: - Low Noise charge pump operating in 1:1, 1:1.5 and 1:2 - Automatic mode switching of the charge pump (up & down) - 1MHz oscillator - Internal LDO for powering the internal circuitry - Audio processing of an analog input signal - Overtemperature Protection - Temperature Measurements of the AS3665 - 10 Bit ADC - 9x12 bit, 1x8 bit PWM Generators - 6 accurate current sources connected to VCP - 3 accurate current source configurable to be connected to VBAT or VCP (to improve efficiency e.g. of red LEDs) - Internal memory for the program execution - 3 sequencers (3 parallel processing units) - a fully programmable multiplexer connecting the three sequencers to the 10 PWM generators - Automatic shutdown to safe power (if SCL and SDA=0 for 100ms) 1. INT/AUDIO_IN is an open drain output. Several interrupt can be easily combined externally. www.austriamicrosystems.com Revision 1.0.2 10 - 77 Free Datasheet http://www.datasheet4u.com/ 11 Page

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