PMR18 Datasheet, PDF (1/1 Pages) Rohm – Ultra-low Ohmic Chip Resistors for Current Detection

Ultra-low Ohmic Chip Resistors for Current Detection
PMR18 Series
● Outline
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.
● Dimensions (Unit: mm)
● 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
Pa項ra　m目eter
Co条n　d件itions
定^Ra格^te電^d 力^{Power 周P囲ow温er 度is dがera7te0d°Cacをco超rdinえg るto 場the合beはlow、c図hart.f1orのam電bi力ent軽tem減pe曲ra線tureにs g従reうate。r than 70°C}
100
80
Spe規ci　fi格cations
0.75W (3/4W)
at 70°C
60
40
20
0_{- 55}
0
70 100 125 155
Ambien^周t T^囲e^温m^度p^（e^°r^Ca^）ture (°C)
図F.i1g.1
R^定a^格ted^電V^圧oltage
R^定a^格ted^電C^流urrent
定_Th格_{e r}電_at圧_ed、_v定_olta格_ge電_a流_ndは_cu次_rre式_ntに_arよ_e り_ca求_lcuめ_latま_edす_a。_{s follows:}
E= P R
I= P/R
E：^{: R}定^a格^ted電^V圧^olta(^gV^e)^(V)
I_I: _：R_定at_æ ¼ed_電Cu_流rre₍n_At (₎A)
PR^PR：^::_：^R定_N公^ao格称^tmedi電抵_naP力_l抗^oRw_値ee(_sW^ris(₍^Wt)_{an))ce (Ω)}
No公m称ina抵l R抗esi値stance
Re抵sis抗tan値ce 許Tol容era差nce
Toef mR_{抵epse抗irsatta温}unrcee_度Co_係effic_数ient _{+25/-55/+25/+125°C (JIS C 5201-1 4.8)}
ORap_{使negrae用}ting_温Tem_度pe_範ratu_囲re
±±11%((FF級C)l，a±s5s%), ±(J5級%)(J Class)
±150ppm/°C
-55°°CCt~o++115555°°CC
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.
Excellence in Electronics
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615-8585, Japan
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Current specifications in effect of 1st. November 2007.
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Catalog No.50G5851E 11.2007 ROHM _○C PR