BA6901F Rohm, BA6901F Datasheet
BA6901F
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BA6901F Summary of contents
Page 1
... BA6901F BA6901F is a 2-phase half-wave motor pre driver for fan motors. This IC has lock detection, and automatic restart functions as motor protection function. Variable speed control is possible by charge-discharge pulse circuit and PWM input. This IC incorporates current limit circuit, hall signal output pin, and alarm signal output pin ...
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... Current sence input terminal Current limit input terminal 13 A1 Output terminal 14 A2 Output terminal 15 V Power supply terminal CC 16 TOUT Charge-discharge pulse output terminal + − REG A2 LOCK DETECTION & A1 AUTOMATIC RESTART PWM − − − − Function BA6901F 16 TOUT H− 2/10 ...
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... Motor driver ICs !Input / output truth circuit Hall input H− Current limit input Output V CC A1,A2 Signal output HO,AL,ALB PWM input V CC VREG 1.42V (Typ.) 30kΩ (Typ.) PWM Charge-discharge pulse output V CC TOUT BA6901F 6.75kΩ (Typ.) 20kΩ (Typ.) 3/10 ...
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... VPWML 0.8 V VCRCP 0.26 0.35 0.44 V VTOH 0.7 1.0 1.3 V VTOL 0.7 1.0 1.3 V BA6901F Conditions At output : OFF VCOM=6.0V VLD=1.5V VLD=1.5V rCD=ILDC / ILDD =−10mA vs voltage O CC IHO=5mA IAL=5mA, AL, ALB terminal CL=100mV At output : ON At output : OFF ITO=−0.5mA vs. V voltage CC ITO=0 ...
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... Comparison voltage of capacitor : (5.0µA Charge current of capacitor : (0.5µA Discharge current of capacitor (Output : ON) (Output : OFF) Toff Ton Output Tr. OFF ON HIGH(Open collector) LOW Depend on the hall output Detect lock Lock cancel BA6901F Typ.) Typ.) Typ.) Typ.) Reset ordinary motion 5/10 ...
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... CNF terminal isn’t necessary. CC CNF Current limit (a) In the case that the current limit is applied. VCL−VCL_CSofs RNF VCL_CSofs : Offset between CL terminal and CS terminal CNF BA6901F terminal (b) In the case that the current limit isn't applied. 6/10 ...
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... The application circuit example that changes the rotation speed of fan motor dependent on ambient temperature by using charge-discharge pulse circuit, PWM input and the thermistor is shown below. + − Thermistor CC − VTOUTH (1.0V ; Typ.) Hall input CR VCRCP TOUT VTOUTL Timing chart for CR terminal, TOUT terminal BA6901F . CC V -VTOUTH CC VCRCP V -VTOUTH CC VTOUTL In case that the CR waveform exceeds the V -VTOUTH ...
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... Junction temperature (°C) + − REG A2 LOCK DETECTION & A1 AUTOMATIC RESTART PWM − − − − TSD ON (Typ. : 175°C) All output transistor OFF. TSD OFF TSD ON Reset ordinary motion. (It has the temperature hysteresis of 20°C <Typ.> ) 175 BA6901F TOUT H− 10 HALL H+ 9 8/10 ...
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... Motor driver ICs 2) Power dissipation Power consumption (PC) of BA6901F is calculated to the following equation Pc1 + Pc2 + Pc3 (1) Pc1 : Power consumption by circuit current × I Pc1 = (2) Pc2 : Power consumption of output terminal – VOH ) × Io Pc2 = (V CC VOH is H voltage of output (A1 or A2). Io can be decreased by using the transistor of high hFE rank and it is effective to consumption electric power reduction ...
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... SOP16 150 SUPPLY VOLTAGE : V (V) CC Supply current−Supply voltage characteristic 0.15±0.1 0.1 BA6901F 12.0 11.8 11.6 11.4 11.2 11.0 10.8 10.6 10.4 10.2 10 OUTPUT CURRENT : I (mA) O Output "H" voltae−Output current characteristic 10/10 90 100 ...