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| MITSUMI IC for DC Motor Control MM1038 IC for DC Motor Control Monolithic IC MM1038 Outline This IC is used to control the revolution rate of motors which can be controlled by low voltages. It can be used to configure a high-precision FG motor using few external components. In particular, a unique new circuit design with improved low-voltage operating characteristics enables configuration of sets such as headphone stereos with auto-reverse functions which are unaffected by power supply voltage drops when the motor is reversed, making them ideal for speed control of low-voltage DC motors. Features 1. 2. 3. 4. 5. Operation at low voltages possible Broad power supply voltage range Small input current Few external components, small package Speed is easily changed over a wide range; accommodates two-speed operation Package SOP-8A (MM1038AF) SOP-8D (MM1038CF) Absolute Maximum Ratings Item Operating temperature Storage temperature Power supply current Output current Power consumption I 1 Power consumption II 2 Symbol TOPR TSTG VCC IL Ratings -10~+60 -30~+125 -0.3~10 700 Ta=25C 340 Ta=25C 690 Ta=40C 290 Ta=40C 580 Units C C V mA mW mW * Pd I Pd II * *1: *2: Power consumption I : Unit Power consumption II : when mounted on board (55.0 20.0 mm, t=0.8 mm, copper area 30%) MITSUMI IC for DC Motor Control MM1038 Electrical Characteristics Item Consumption current Startup current Reference voltage (Except where noted otherwise, Ta=25C) Units mV mV mV %/V %/mA %/C V %/V %/mA %/C Measurement conditions Min. Typ. Max. A1 1.75 4.0 A2 when RV is 1.5 500 A1 when SW1 is off 90 100 110 VS fluctuation rate for VCC between 1.5 and 0.1 0.5 Reference voltage fluctuation I VS1 3.5 V with VCC=3.0 V as reference VS fluctuation rate for IM between 25 and 0.05 0.05 Reference voltage fluctuation II VS2 200 mA with IM=100 mA as reference VS fluctuation rate for Ta between -10 and 0.01 Reference voltage fluctuation III VS3 as reference 60 C with Ta=25C Output saturation voltage VoSAT V2 SW2 on, when IM is 200mA 0.2 0.3 Bridge ratio K V4/V3 9.5 10 10.5 K fluctuation rate for VCC between 1.5 and 0.1 0.2 Bridge ratio fluctuation I K1 3.5 V with VCC=3.0 V as reference K fluctuation rate for IM between 25 and Bridge ratio fluctuation II K2 0.01 0.06 200 mA with IM=100 mA as reference K fluctuation rate for Ta between -10 and Bridge ratio fluctuation III K3 0.01 60 C with Ta=25 C as reference Measurement conditions: Except where noted otherwise,VCC=3.0 V, IM=100 mA, SW1=on, SW2=off Symbol Id IMS VS Block Diagram Measuring Circuit |
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