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Ambient light sensor automates brightness adjustment

Posted: 18 May 2011     Print Version  Bookmark and Share

Keywords:ambient  light sensor  lighting 

Renesas Electronics Corp. debuts the PH5551A2NA1, a compact digital ambient light sensor aimed at compact and precise automatic brightness adjustment or automatic on/off circuits for digital household appliances and electronics, mobile terminals and handsets, factory automation (FA) equipment, and lighting fixtures for both indoor and outdoor use.

The PH5551A2NA1 device is a digital ambient light sensor that detects the brightness of ambient light and sends a corresponding signal to a device such as a microcontroller (MCU) while offering improved performance, reduced power consumption, and greater compactness in brightness adjustment circuits.

In the past, light sensors employing cadmium sulfide have been widely used for such applications, but demand for silicon semiconductor ambient light sensors is growing due to their reduced environmental impact.

Key features of the PH5551A2NA1 device include: 1) Clear mould SON package touted as among the smallest and thinnest in the industry; 2) Reduction to ±20 per cent of sensitivity variation due to different light sources; and 3) Enhanced flexibility when used in combination with an MCU.

Samples of Renesas Electronics' new PH5551A2NA1 device are available now, priced at Rs.53.57 ($1.20) per unit. Mass production will start in May 2011 and is scheduled to reach a scale of 10,00,000 units per month. Pricing and availability are subject to change without notice.

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