Remaining Battery Power Display MM1206 MITSUMI Remaining Battery Power Display Monolithic IC MM1206 Outline This IC detects battery voltage and displays the remaining power on an LED or LCD display. The appeal of battery-driven equipment lies in its portability, but when the battery runs down and the equipment does not function, customer complaints and breakdowns may result. This IC prevents such trouble before it starts. Features 1. There are three displays for remaining battery power : FULL / MIDDLE / EMPTY. 2. Nine patterns built in for detection voltage, linked to two manganese batteries. Standard setting : 2.5V, 2.25V 3. External parts held to a minimum Package SOP-8D (MM1206XF) VSOP-8A (MM1206AF) Detection Voltage Matrix Chart SW1 SW2 Detection Voltage 1 Detection Voltage 2 GND GND 2.64V 2.35V GND OPEN 2.62V 2.27V Voltage Accuracy *Detection Voltage 1 : ±100mV typ. GND VCC 2.60V 2.18V Detection Voltage 2 : ±90mV typ. OPEN GND 2.52V 2.35V OPEN OPEN 2.50V 2.25V OPEN VCC 2.48V 2.17V VCC GND 2.42V 2.30V VCC OPEN 2.40V 2.24V VCC VCC 2.38V 2.15V Absolute Maximum Ratings (Ta=25°C) Item Rating Storage temperature -40~+125°C Operating temperature -20~+70°C Input voltage 5V Allowable loss 300mW Remaining Battery Power Display MM1206 MITSUMI Electrical Characteristics (Unless otherwise specified Ta=25°C, SW1=SW2=open) Item Symbol Measurement Conditions Current consumption I ICC VCC=3.0V Detection voltage I VTH1 VCC=H L Detection voltage II VTH2 VCC=H L VT Detection voltage difference Detection voltage temperature factor VTH/ VT=VTH1-VTH2 Min. Typ. Max. Unit. 0.75 1.1 mA 2.4 2.5 2.6 V 2.16 2.25 2.34 V 210 250 290 mV T Detection voltage I, Adjustment 1 + VT1 Detection voltage I, Adjustment 2 - VT1 Detection voltage II, Adjustment 1 + Detection voltage II, Adjustment 2 ±200 ppm/°C SW1=GND 70 100 130 mV SW1=VCC -70 -100 -130 mV SW2=GND 70 100 130 mV - VT2 SW2=VCC -70 -100 -130 mV Output sink current I IS1 VCC=2.7V, VCE=0.5V 5 10 mA Output sink current II IS2 VCC=2.38V, VCE=0.5V 5 10 mA Output sink current III IS3 VCC=2.0V, VCE=0.5V 5 10 mA Output saturation voltage I VCE1 VCC=2.7V, ISINK=1mA 100 150 mV Output saturation voltage II VCE2 VCC=2.38V, ISINK=1mA 100 150 mV Output saturation voltage III VCE3 VCC=2.0V, ISINK=1mA 50 80 mV Output leak voltage I ILE1 VCC=2.3V, VCE=1.5V 1 µA Output leak voltage II ILE2 VCC=2.7V, VCE=1.5V 1 µA Output leak voltage II ILE2' VCC=2.0V, VCE=1.5V 1 µA Output leak voltage III ILE3 VCC=2.5V, VCE=1.5V 1 µA VT2 Block Diagram, Example of Application Circuit 2.50V LED1 ON OFF OFF LED2 OFF ON OFF LED3 OFF OFF ON Timing Chart VCC 2.50V 2.25V ON LED1 OFF ON LED2 OFF LED3 ON OFF 2.25V