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AS3630 Datasheet(PDF) 1 Page - ams AG |
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AS3630 Datasheet(HTML) 1 Page - ams AG |
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1 / 72 page  8A Supercap Flash Driver AS3630 – 1 AS3630 8A Supercap Flash Driver The AS3630 is an inductive high efficient 4MHz dual DCDC step up converter with several sources. It supports the charging of a Supercap, its voltage balancing and a highly efficient DCDC step up from the Supercap to the LED and from VIN to the LED to power the flash LED with up to 8A. The AS3630 supports the pre-charging of the Supercap (to VIN) to reduce the startup time for the flash without reducing the lifetime of the Supercap. The system concept supports an immediate torch function without first charging the Supercap. The AS3630 includes flash timeout, over- undervoltage, overtemperature and LED short circuit protection. The AS3630 is controlled by an I²C interface for adjustment of the currents and timings, set the end of charge voltage and measure the Supercap and LED parameters through the internal ADC. A dedicated TXMASK/TORCH input can be used for a torch button -or- reducing the battery current if a RF PA is operated at the same time (TX Masking). A hardware enable pin -ON can be used as a reset input. The AS3630 is available in a space-saving WL-CSP 5x5 balls package measuring only 2.5x2.5x0.6mm and operates over the -30ºC to +85ºC temperature range. Figure AS3630 – 1: Key Benefits and Features Benefits Features Reduce Supercap size Dual high efficiency boost converter with soft start allows small coils Instantaneous Torch operation for improved user experience Immediate Torch functions with charging of the Supercap Tiny external coils 4MHz fixed frequency DCDC System Safety 10bit ADC converter for system monitoring with Protection functions: Automatic Flash Timeout timer to protect the LED Overvoltage and undervoltage Protection LED (NTC) and device Overtemperature Protection LED short/open circuit protection Improved thermal performance (ground = heat sink) Flash LED(s) cathode connected to ground: General Description |
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