S-5855AAAA-M5T1U ABLIC

S-5855A Series PWM OUTPUT TEMPERATURE SENSOR IC www.sii-ic.com SII Semiconductor Corporation, 2010-2013 Rev.1.2 01 The S-5855A Series, developed by CMOS technology, is a 1-wire PWM output temperature sensor IC of low current consumption that itself changes the duty ratio according to temperature. The duty ratio decreases from 100% if exceeding the temperature set by user, and this decrease is linear against the temperature rise. The output form is selectable from CMOS output and Nch open-drain output. Its small packages SNT-4A and SOT-23-5 enable high-density mounting. Features PWM output : 1-wire PWM interface Temperature accuracy : 3.0C Duty ratio change-start temperature : Selectable from +40C to +80C in 10C step Duty ratio temperature sensitivity : Selectable from 1 %/C to 4 %/C in 1 %/C step Low current consumption : 50 A typ. (Ta = +25C) Low power supply voltage : 1.65 V to 5.5 V Wide range of operation temperature : Ta = 40C to +125C Lead-free (Sn 100%), halogen-free Application Temperature compensation for LED instruments Packages SNT-4A SOT-23-5 1 PWM OUTPUT TEMPERATURE SENSOR IC S-5855A Series Rev.1.2 01 Block Diagrams 1. CMOS output product VDD Temperature sensor *1 + DOUT Triangle wave generator VSS CF CFREQ *1. Parasitic diode Figure 1 2. Nch open-drain output product VDD Temperature DOUT sensor *1 + Triangle wave generator VSS CF CFREQ *1. Parasitic diode Figure 2 2