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CS3341YDR14 Folha de dados(PDF) 6 Page - ON Semiconductor |
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CS3341YDR14 Folha de dados(HTML) 6 Page - ON Semiconductor |
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6 / 8 page  CS3341, CS3351, CS387 http://onsemi.com 6 REGULATION WAVEFORMS The CS3341/3351/387 utilizes proportion control to maintain regulation. Waveforms depicting operation are shown in Figures 4, 5 and 6, where VBAT/N is the divided down voltage present on the Sense pin using R1 and R2 (Figure 7). A sawtooth waveform is generated internally. The amplitude of this waveform is listed in the electric parameter section as proportion control. The oscillator voltage is summed with VBAT/N, and compared with the internal voltage regulator (VREG) in the regulation comparator which controls the field through the output “Device Driver.” Figure 4 shows typical steady–state operation. A 50% duty cycle is maintained. Figure 5 shows the effect of a drop in voltage on (VBAT/N + VOSC). Notice the duty cycle increase to the field drive. Figure 6 shows the effect of an increase in voltage (above the regulation voltage) on (VBAT/N + VOSC). Notice the decrease in field drive. Figure 4. 50% Duty Cycle, Steady State Figure 5. > 50% Duty Cycle, Increased Load Figure 6. < 50% Duty Cycle, Decreased Load VREG VBAT/N + VOSC VREG VREG VBAT/N + VOSC Field Driver On Field Driver On Field Driver On VBAT/N + VOSC Figure 7. Typical Application DIagram D1 C3 BATTERY 2N6284 Power Darlington POWER GROUND R4 18 k Ω C1 0.1 µF R2 50 k Ω 0.047 µF C4 0.022 µF R6 20 k Ω R9 2.4 k Ω GND Driver SC STATOR STATOR RECTIFIER S A F I FIELD Lamp Indicator R10 510 Ω IGNITION SWITCH R7 MPSA13 or CS299 *Note: C2 optional for reduced jitter. LAMP VCC Sense OSC IGN *C2 10 µF R1 100 k Ω R5 10 k Ω R3 250 Ω 10 Ω MR2502 MR2502 MR2502 |
Nº de peça semelhante - CS3341YDR14 |
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Descrição semelhante - CS3341YDR14 |
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