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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9960 데이터시트(PDF) 45 Page - STMicroelectronics |
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L9960 데이터시트(HTML) 45 Page - STMicroelectronics |
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45 / 95 page  DS11115 Rev 10 45/95 L9960, L9960T Functional description 94 The ideal switching waveforms generated by an inductive load operating in switching mode are described in the following figure. The Initial state of the bridge shown in the figure corresponds to a freewheeling phase. Figure 19. Ideal waveforms of switching with slew rate control There are two phases during each turn-on and turn-off, in which the output slew-rate is controlled: current slope control for phase A, and voltage slope control for phase B (phase A and B refer to Figure 19). During phase A (current slope control), a constant gate current IA results in a defined dIout/dt due to the transconductance of the output stage (no closed loop control). GAPGPS02336 Vgate_fb VC,Miller Vgate_fb IA IB IA IB Vcharge_pump IS1 IS2 ICP1 ICP2 VS/R_th (RDSON min.) AB BA 1 2 3 4 5 6 7 8 9 10 Vout_on ILoad=Vps/R* DC ZOOM VMOS IOUT Toverlap Vbat I load GateDrive HSideMOS diode I out V drain_source V ds I gate_source V gate I Conditions) (Initial OFF TURN-ON ON TURN-OFF OFF |
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