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BA6287F Fiches technique(PDF) 3 Page - Rohm |
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BA6287F Fiches technique(HTML) 3 Page - Rohm |
3 / 6 page 441 Motor driver ICs BA6287F FElectrical characteristics (unless otherwise noted, Ta = 25_C, VCC = 9V, VM=9V, VREF = 9V) FCircuit operation (1) Input section The four output modes are controlled by two logic inputs. Current flows from OUT1 to OUT2 when FIN is HIGH and RIN is LOW, and from OUT2 to OUT1 when RIN is HIGH and FIN is LOW (refer to the truth table). The input circuit can be operated by a logic circuit with a current capacity of 120 X 170µA. Input / output truth table (2) Output section Current flows from OUT1 to OUT2 during forward rota- tion, and from OUT2 to OUT1 during reverse rotation. The output voltages VOH and VOL are given by : VOH [V]=VREF *VCE (sat) (PNP)*VBE (NPN) VOL [V]=VCE (sat) (NPN) VCE and VBE are functions of the output current (see elec- trical characteristic curves). The output current can be set with the VREF pin. (3) Power saving circuit All circuits are turned OFF when the FIN and RIN input pins are both put to LOW level. This circuit saves power dur- ing standby mode by leaving the outputs OPEN. (4) Thermal shutdown circuit When the thermal shutdown circuit is activated at the chip temperature of about 175 _C (typical), the outputs are left OPEN. The temperature difference between the activation and deactivation settings is about 15 _C. When the thermal shutdown circuit is deactivated, the outputs revert to the status determined by input mode. FApplication example |
Numéro de pièce similaire - BA6287F |
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Description similaire - BA6287F |
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