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LB1845 Fiches technique(PDF) 5 Page - Sanyo Semicon Device |
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LB1845 Fiches technique(HTML) 5 Page - Sanyo Semicon Device |
5 / 9 page LB1845 No.5505-5/9 Pin Description Pin No Pin Function 1, 14 VBB Output stage power-supply voltage 2 13 SENSE1 SENSE2 Set current detection pins. Connect these pins, fed back through noise filters, to E1 and E2. 3 12 E1 E2 The set current is controlled by the resistors Re inserted between these pins and ground. 4, 11 D-GND Internal diode anode connection 6 7 8 9 OUT1B OUT1A OUT2B OUT2A Outputs 15 GND Ground 27 16 RC1 RC2 Used to set the output off time for the switched output signal. The fixed off times are set by the capacitors and resistors connected to these pins. toff = CR. 26 17 VREF1 VREF2 Output current settings The output current is determined by the voltage (in the range 1.5 to 7.5V) input to these pins. 25 18 PHASE1 PHASE2 Output phase switching inputs. High-level input: OUTA = high, OUTB = low Low-level input: OUTA = low, OUTB = high 24 19 ENABLE1 ENABLE2 Output on/off settings High-level input: output off Low-level input: output on 22, 23 21, 20 I01, I11 I02, I12 Digital inputs that set the output current 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 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. ILB00884 RC pin E pin SENSE pin VOUT pin td Spike noise toff |
Numéro de pièce similaire - LB1845 |
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Description similaire - LB1845 |
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