Remaining Battery Power Display MM1210 MITSUMI 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 Rating Storage temperature -40~+125°C Operating temperature -20~+70°C Input voltage 5V Output pin voltage 5V Allowable loss 300mW Remaining Battery Power Display MM1210 MITSUMI Electrical Characteristics (Unless otherwise specified Ta=25°C, VCC=1.5V, VCE=VCC) Item Symbol Measurement Conditions Current consumption ICC1 VCC=1.5V 15 25 µA Current consumption during waiting ICC2 VCC=1.3V, VCE=0.3V 1.5 2.5 µA Detection voltage I VTH1 VCC=H L 1.169 1.180 1.191 V Detection voltage II VTH2 VCC=H L 1.050 1.060 1.070 V Detection voltage Difference VT VT=VTH1-VTH2 Min. Typ. Max. Unit 100 120 140 ±200 Detection voltage temperature factor 10 20 mV PPM/°C Hysteresis voltage VHYS 35 mV Output sink current I IS1 VCC=1.3V, VO1=0.3V 40 µA Output sink current II IS2 VCC=1.3V, V02=0.3V 40 µA Output saturation voltage I VO1 ISINK=30UA 150 250 mV Output saturation voltage II VO2 ISINK=30UA 150 250 mV Output leak voltage I ILE1 VCC=1.0V, VO1=0.5V 1 µA Output leak voltage II ILE2 VCC=1.0V, VO2=1.5V 1 µA Power supply voltage operating limit VOPL VCC=variable, VO < 0.4V 0.70 0.75 V -0.3 VCC 0.3 V 100 300 500 nA -0.3 0 0.3 V Input H voltage VCEH Input L current ICEH Input L voltage VCEL Threshold value I VTHT VCC=1.0V, VTC=variable 0.34 0.42 0.50 V Threshold value II VTHT VCC=1.0V, VTC=variable 0.04 0.12 0.20 V Discharge current IDIS VCC=1.0V, VTC=0.5V 30 60 90 nA Charge current ICHA VCC=1.5V, VTC=0.5V 0.40 0.80 1.20 µA Non-induction time td VCC=1.5V, C=0.033UF 120 180 240 mS L transmission delay time tdLH VCC=L 1.0 2.0 4.0 mS Ripple absorption resistance RRIP 70 100 130 kΩ CE pin TC pin Note : VCC applied pulse conditions VCC=1.5V, VCE=0V H, C=0.033UF measure resistance between pins 8-6 VCC applied pulse GND td1 1.25V 1.10V td2 1.15V 1.00V Remaining Battery Power Display MM1210 MITSUMI Timing Chart hysteresis 1.20V VS1 1.18V 1.08V VS2 1.06V hysteresis VCC GND 0.75V 0.40V 0.05V CE pin TC pin threshold 1 threshold 2 H ROUT1 ROUT2 tD1 L H tDLH tD2 L tDLH is calculated by the following formula : *Delay time tD1=tD2 (S)=C (F) (5.4 10 ) 6 T 4 tDLH (S)=CT (F) (6.3 10 ) CT, TC pin connection capacitance Block Diagram, Example of Application Circuit Output VCC 1.18 1.06 ROUT 1 L H H LED 2 L L H CE pin H Operation L Waiting 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 Remaining Battery Power Display MM1210 MITSUMI Characteristics Detection voltage 1 Temperature characteristics (mV) Detection voltage 2 Temperature characteristics 1188 (mV) 1068 1184 1064 1180 1060 1176 1056 1172 1052 -10 10 30 50 70 -10 Hysteresis voltage 1 Temperature characteristics (mV) 27 24 24 21 21 18 18 15 15 12 10 30 50 70 50 70 50 70 Hysteresis voltage 2 Temperature characteristics (mV) 27 -10 30 Temperature Temperature 12 10 50 70 -10 10 30 Temperature Temperature Output sink current 1 Temperature characteristics Output saturation voltage 1 Temperature characteristics (mV) 280 (mV) 90 240 80 200 70 60 160 50 120 40 -10 10 30 Temperature 50 70 -10 10 30 Temperature