Ultra-low Ohmic Chip Resistors for Current Detection PMR18 Series ● Outline ● Dimensions (Unit: mm) The PMR18 series chip resistors utilize a metallic substrate featuring superior electrical characteristics, enabling ultra-low resistance values (2 to 10mΩ). This makes them ideal for battery charge detection in portable devices, power supply control in HDDs and notebook PCs, current control blocks requiring compactness, and sets using overcurrent protection circuitry. ● Features ＊ 1) Metallic resistive element (developed using original manufacturing processes) utilized for superior electrical characteristics 2) 0.75W rated power in the 3216(1206) size 3) Low resistance temperature coefficient (TCR) of 150ppm/°C with ultra-low resistance values (2 to 10mΩ) 4) Lead-free ＊ * The size will vary depending on the resistance value ● Applications Notebook PCs, HDDs, mobile phones, compact battery powered devices, DC/DC converters, and general purpose power supplies. ● Rated Values • Electrical Characteristics 項 目 Parameter 規 格 Specifications Power is derated according to the below chart .1の電力軽減曲線に従う。 for ambient temperatures greater than 70°C 周囲温度が70°Cを超える場合は、図 100 定格電力 (%) Rated Power (%) Rated Power 定格電力 条 件 Conditions 0.75W (3/4W) at 70°C 80 60 40 20 0 - 55 0 70 100 125 155 °C） Ambient周囲温度（ Temperature (°C) Fig.1 図.1 定格電圧 Rated Voltage 定格電流 Rated Current 定格電圧、定格電流は次式により求めます。 The rated voltage and current are calculated as follows: E= P R I= P/R E: Rated Voltage E：定格電圧 (V)(V) I:I ：定格電流 Rated Current (A)(A) P: Rated Power (W) P：定格電力 (W) R: Nominal Resistance (Ω) R：公称抵抗値 ( ) 公称抵抗値 Nominal Resistance ±1%(F級)，±5%(J級) ±1% (F Class), ±5% (J Class) 抵抗値許容差 Resistance Tolerance Temperature Coefficient 抵抗温度係数 of Resistance Operating Temperature 使用温度範囲 Range ±150ppm/°C +25/-55/+25/+125°C (JIS C 5201-1 4.8) -55°C to +155°C °C~+155°C The specifications for the product described in this document are for reference only. Upon actual use, therefore, please request that specifications to be separately delivered. The application circuit examples, information, and various data pertaining to the use of the products presented in this documentation are provided for reference purposes only. Please note that ROHM cannot bear any responsibility regarding any problems relating to industrial property rights resulting from their use thereof. The products listed in this catalog are designed to be used with ordinary electronic equipment or devices (such as audio visual equipment, office-automation equipment, communications devices, electrical appliances and electronic toys). Should you intend to use these products with equipment or devices which require an extremely high level of reliability and the malfunction of which would directly endanger human life (such as medical instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers and other safety devices), please be sure to consult with our sales representative in advance. Current specifications in effect of 1st. November 2007. Excellence in Electronics Contact us for further information about the products. 21, Saiin Mizosaki-cho, Ukyo-ku, Kyoto 615-8585, Japan TEL: +81-75-311-2121 FAX: +81-75-315-0172 URL http: // www. rohm. com Seoul Dalian Beijing Shanghai Shenzhen Hong Kong Taipei Shingapore Philippines Thailand TEL: +82-2-8182-700 TEL: +86-411-8230-8549 TEL: +86-10-8525-2483 TEL: +86-21-6279-2727 TEL: +86-755-8307-3008 TEL: +852-2-740-6262 TEL: +886-2-2500-6956 TEL: +65-6332-2322 TEL: +63-2807-6872 TEL: +66-2-254-4890 FAX: +82-2-8182-715 FAX: +86-411-8230-8537 FAX: +86-10-8525-2489 FAX: +86-21-6247-2066 FAX: +86-755-8307-3003 FAX: +852-2-375-8971 FAX: +886-2-2503-2869 FAX: +65-6332-5662 FAX: +63-2809-1422 FAX: +66-2-256-6334 Malaysia Germany France United Kingdom San Diego Atlanta Dallas Kyoto Yokohama TEL: +60-3-7958-8355 TEL: +49-2154-9210 TEL: +33-1-5697-3060 TEL: +44-1-908-306700 TEL: +1-858-625-3630 TEL: +1-770-754-5972 TEL: +1-469-287-5366 TEL: +81-75-365-1218 TEL: +81-45-476-2290 FAX: +60-3-7958-8377 FAX: +49-2154-921400 FAX: +33-1-5697-3080 FAX: +44-1-908-235788 FAX: +1-858-625-3670 FAX: +1-770-754-0691 FAX: +1-469-362-7973 FAX: +81-75-365-1228 FAX: +81-45-476-2295 Catalog No.50G5851E 11.2007 ROHM ○ C PR