MM1210

MITSUMI Remaining Battery Power Display MM1210 Remaining Battery Power Display Monolithic IC MM1210 Series Outline This IC detects battery voltage and displays the remaining power in the battery using an LCD. Long life and light weight are emphasized in the most recent portable equipment, which increasingly use nickel cadmium and nickel hydrogen batteries. For these batteries, the discharge characteristics mean that extremely precise detection of the remaining battery power is required. This IC enables detection of this type through high precision voltage detection. Features 1. Two built-in detection voltages 2. High precision detection voltages 3. Low current consumption 1.18V / 1.06V typ. ±1% typ. During detection ; 15 µA typ. During waiting ; 15 µA typ. 4. Setting possible during non-induction It is possible to set a time period for which detection is ignored, as for example when voltage drops due to temporary heavy loads. 5. Ripple absorption pins It is possible to check fluctuations in detection through continuous rippling. 6. Built-in hysteresis voltage Package SOP-8D (MM1210XF) Absolute Maximum Ratings Item Storage temperature Operating temperature Input voltage Output pin voltage Allowable loss Rating -40~+125°C -20~+70°C 5V 5V 300mW MITSUMI Remaining Battery Power Display MM1210 Electrical Characteristics Item Current consumption (Unless otherwise specified Ta=25°C, VCC=1.5V, VCE=VCC) Symbol ICC1 ICC2 VTH1 VTH2 VT VHYS IS1 IS2 VO1 VO2 ILE1 ILE2 VOPL VCEH ICEH VCEL VTHT VTHT IDIS ICHA td tdLH RRIP VCC=1.0V, VTC=variable VCC=1.0V, VTC=variable VCC=1.0V, VTC=0.5V VCC=1.5V, VTC=0.5V VCC=1.5V, C=0.033UF VCC=L H, C=0.033UF measure resistance between pins 8-6 VCC=1.5V, VCE=0V VCC=1.3V, VO1=0.3V VCC=1.3V, V02=0.3V ISINK=30UA ISINK=30UA VCC=1.0V, VO1=0.5V VCC=1.0V, VO2=1.5V VCC=variable, VO < 0.4V -0.3 100 -0.3 0.34 0.04 30 0.40 120 1.0 70 td1 1.25V 1.10V Measurement Conditions VCC=1.5V VCC=1.3V, VCE=0.3V VCC=H L VCC=H L VT=VTH1-VTH2 Min. Typ. Max. Unit 15 1.5 25 2.5 µA µA V V mV PPM/°C 35 mV µA µA 150 150 250 250 1 1 0.70 VCC 300 0 0.42 0.12 60 0.80 180 2.0 100 0.75 0.3 500 0.3 0.50 0.20 90 1.20 240 4.0 130 mV mV µA µA V V nA V V V nA µA mS mS kΩ Current consumption during waiting Detection voltage I Detection voltage II Detection voltage Difference Detection voltage temperature factor Hysteresis voltage Output sink current I Output sink current II Output saturation voltage I Output saturation voltage II Output leak voltage I Output leak voltage II Power supply voltage operating limit Input H voltage CE pin Input L current Input L voltage Threshold value I TC pin Threshold value II Discharge current Charge current Non-induction time L transmission delay time Ripple absorption resistance Note : VCC applied pulse conditions 1.169 1.180 1.191 1.050 1.060 1.070 100 10 40 40 120 ±200 20 140 VCC applied pulse GND td2 1.15V 1.00V MITSUMI Remaining Battery Power Display MM1210 Timing Chart 1.20V VS1 1.18V 1.08V VS2 1.06V VCC GND 0.75V 0.40V 0.05V hysteresis hysteresis CE pin TC pin threshold 1 threshold 2 H ROUT1 ROUT2 L H L tDLH tD1 tDLH tD2 *Delay time is calculated (by the following formula : tD1=tD2 (S)=C F) (5.4 10 ) T 6 tDLH (S)=CT (F) (6.3 10 ) CT, TC pin connection capacitance 4 Block Diagram, Example of Application Circuit Output VCC ROUT 1 LED 2 CE pin H L Operation Waiting 1.18 L L H L 1.06 H H Note 1 : Please connect the CE pin to VCC when not using. Note 2 : The Adj terminal is used in the product inspection process, so please do not connect it to other wiring. Capacitance of external capacitor for non-induction time 101 1S 100 100mS 10-1 10mS 10-2 1mS 10-3 0.1mS 10-4 0.01mS 10-5 10-10 10-8 10-9 100PF 1000PF 0.01UF 10-7 0.1UF 10-6 1UF MITSUMI Remaining Battery Power Display MM1210 Characteristics Detection voltage 1 Temperature characteristics (mV) 1188 1184 1180 1176 1172 -10 10 30 50 70 Detection voltage 2 Temperature characteristics (mV) 1068 1064 1060 1056 1052 -10 10 30 50 70 Temperature Temperature Hysteresis voltage 1 Temperature characteristics (mV) 27 24 21 18 15 12 -10 10 30 50 70 Hysteresis voltage 2 Temperature characteristics (mV) 27 24 21 18 15 12 -10 10 30 50 70 Temperature Temperature Output sink current 1 Temperature characteristics (mV) 280 240 200 160 120 -10 10 30 50 70 Output saturation voltage 1 Temperature characteristics (mV) 90 80 70 60 50 40 -10 10 30 50 70 Temperature Temperature