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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9300 датащи(PDF) 72 Page - STMicroelectronics |
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L9300 датащи(HTML) 72 Page - STMicroelectronics |
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72 / 182 page  11 Charge pump 11.1 Charge pump functional description The device uses a two-stage charge pump circuit with external capacitors to ensure external MOSFET pre– drivers, valve drivers and VDD3/4 low drop performances are guaranteed during low battery cranking. An internal control loop monitors the output voltage and controls the charge pump efficiency in order to reduce charge pump activity at light loads to reduce emissions during normal activity; when the battery input is low the charge pump is able to work at full power to guarantee relevant parameters. The device provides an under voltage monitor on charge pump voltage. In case of fault the device behaves as reported in the Functional table chapter and a dedicated SPI bit is set and latched. The diagnostic is not masked during power-up phase. Figure 41. Charge pump X Charge Pump VC1 VC2 VC3 VC4 X X X X X C1 C2 CTANK VBATP VCP GADG1907171250PS 11.2 Charge pump electrical characteristics 5.5 V ≤ VBATP ≤ 19 V; -40 °C ≤ Tj ≤ 175 °C, unless otherwise noticed. All voltages refer to GND pin. Table 44. Charge Pump electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Pin Charge pump C1, C2 External capacitor Application note 68 nF VCx CTANK Tank capacitor Application note 220 nF VCP VCP_freq Charge pump frequency fOSCINT[MG1] /34 kHz VCx VCP_out Target CP output Design info, not tested VBATP+9 V VCP VCP_out Minimum charge pump output voltage Iload=10 mA VBATP min=5.5 V VBATP+7 V VCP Diagnostic VCP_UV VCP under voltage VBATP+5 V VBATP+6 V V VCP VCP_UV_FLT VCP digital under voltage filter time Guaranteed by scan 7.5 10 12.5 µs VCP L9300 Charge pump DS12258 - Rev 4 page 72/182 |
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