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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L6460 датащи(PDF) 78 Page - STMicroelectronics |
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L6460 датащи(HTML) 78 Page - STMicroelectronics |
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78 / 139 page  Power bridges L6460 78/139 Doc ID 17713 Rev 1 Figure 23. Simple buck regulator When this control loop is intended to be used as a simple buck regulator, the proper Aux3BatteryCharge bit must be written in the Aux3SwCfg1 register. The regulator will also implement a soft start strategy. When L6460 “low power mode” is enabled this regulator will be disabled. Here after are summarized the primary features of the regulator: – Internal power switch. – Nonlinear pulse skipping control. – Internally generated PWM (250 KHz switching frequency). – Cycle by cycle current limiting using internal current sensor/ external current sense differential amplifier. – Protected against load short circuit. – Soft start circuitry to limit inrush current flow from primary supply. – Under voltage signal (both continuous and latched) accessible through SPI. – Over temperature protection. In pulse skipping control PWM the duty cycle must be decided by the user depending on supply voltage and regulated voltage. Therefore the switching regulator has 4 possible PWM duty cycles that can be changed writing in the Aux3PWMTable[1:0] bits in the Aux3SwCfg1 register according to the Table 31. IREF_FB VREF_FB COMP_I COMP_V PULSE SKIPPING BURST CONTROL LOGIC PEAK CURRENT MODE CONTROL LOGIC BRIDGE 4 PARALLELED POWER STAGE SelFBRef<1:0> DC4_plus DC4_minus SelCurrRef<1:0> TO LOAD FBRef CurrRef Ilimit PWM L6460 |
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