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LB1845 Arkusz danych(PDF) 4 Page - Sanyo Semicon Device |
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LB1845 Arkusz danych(HTML) 4 Page - Sanyo Semicon Device |
4 / 7 page Pin Functions Timing chart for pin switching operations during PWM drive Figure 1 Switching Waveforms toff: Output off time. Determined by external capacitor and resistor Ct and Rt. (toff = Ct × Rt) td: Delay time between the point the set current is sensed at the SENSE pin and the point the output turns off. No. 5505-4/7 LB1845 Pin no. Pin Function 1, 14 VBB Output stage power-supply voltage 2 SENSE1 Set current detection pins. 13 SENSE2 Connect these pins, fed back through noise filters, to E1 and E2. 3 E1 The set current is controlled by the resistors Re inserted between these pins and ground. 12 E2 4, 11 D-GND Internal diode anode connection 6 OUT 1B Outputs 7 OUT 1A 8 OUT 2B 9 OUT 2A 15 GND Ground 27 RC1 Used to set the output off time for the switched output signal. 16 RC2 The fixed off times are set by the capacitors and resistors connected to these pins. toff = CR. 26 VREF1 Output current settings 17 VREF2 The output current is determined by the voltage (in the range 1.5 to 7.5 V) input to these pins. 25 PHASE1 Output phase switching inputs. 18 PHASE2 High-level input: OUT A = high, OUT B = low Low-level input: OUT A = low, OUT B = high 24 ENABLE1 Output on/off settings 19 ENABLE2 High-level input: output off Low-level input: output on 22, 23 I01, I11 Digital inputs that set the output current 21, 20 I02, I12 The output currents can be set to 1/3, 2/3, or full by setting these pins to appropriate combinations of high and low levels. 28 VCC Logic block power supply |
Podobny numer części - LB1845 |
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Podobny opis - LB1845 |
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