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MCZ33099EG bảng dữ liệu(PDF) 9 Page - Freescale Semiconductor, Inc |
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MCZ33099EG bảng dữ liệu(HTML) 9 Page - Freescale Semiconductor, Inc |
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9 / 18 page  Analog Integrated Circuit Device Data Freescale Semiconductor 9 33099 TYPICAL APPLICATIONS INTRODUCTION TYPICAL APPLICATIONS INTRODUCTION The 33099 is an alternator voltage regulator designed with internal level shifting resistors to control the voltage in a 12 V automotive system that uses a three-phase alternator with a rotating field winding. The system shown in Figure 4 includes an alternator with its associated field coil, stator coils and rectifiers, an automotive battery, a fault indicator lamp, an ignition switch, a field flyback diode, and the 33099. Figure 4. 33099 Simplified Application The 12 V system voltage (VBAT) is connected to a REMOTE input by a remote wire, which provides the IC regulator with an external Kelvin connection directly to the battery to provide REMOTE voltage, Vrem. The system voltage at the BAT pin is also sensed by an internal Local IC connection as Local voltage Vl. The Local connection is provided in the event the remote wire or remote connection becomes faulty such as being resistive, an open, or shorted to ground. The PHASE input is normally connected to a tap on one corner of the alternator's stator winding, which provides an AC phase voltage (Vph) for the IC to determine the rotational frequency (fph) of the alternator rotor. Two frequency comparators (F1 and F2) monitor voltage Vph to determine a phase rotation detection frequency (f1) and a Low/High RPM transition phase frequency (f2), respectively. A PHASE FILTER pin is provided for externally providing a filter capacitance for filtering phase input noise. The regulated DC system set voltage (Vset) is achieved by employing feedback to compare a ratioed value of Vset to an internal IC bandgap voltage reference having a negative temperature coefficient (TC). The GATE drive of an external N-channel MOSFET is regulated by the IC to control the field current in the alternator field coil as an alternating ON or OFF state dependent on load current conditions affecting voltage Vset. The external MOSFET receives GATE-to-source voltage drive from between the GATE and SOURCE output pins of the IC. The GATE-to-source voltage is a Pulse Width Low Pass 0.6 V Over Voltage Detector 1.25 V Bandgap Reference Regulator Regulator VDD Internal V reg and Bias Current Regulator Charge Pump Regulator Min Duty Cycle Generator OR1 LD OV REMOTE Local Sense PHASE BATT GATE SOURCE V V (5.0 V) (2.0 V) 1.25 V S1 S2 CB1 CB2 LB FB Css Z1 VTssc A N D 4 S3 Vg R1 R2 R3 R4 R5 RF Cf Vls Vo Vl UV Ign Delay Circuit Gate Polling Circuit Local 4 LSB 4 MSB 8-Bit Counter Digital Duty Cycle Generator U/D Counter Np Control Switch Up/Down MUX 1.25 V F2 DAC A N D 3 1.25V Battery Polling Lamp Driver Circuit OR2 A N D 1 LCR1 LRC2 AGND GND LAMP DRAIN LAMP GATE IGN Dtl Z2 Rs To Logic A N D 2 u/d u/d Drain F1 A/D Duty Cycle Comparator & Tracking Circuit Limit Current Detector Limit Thermal Detector Battery ref DD VTigm Iign VTdsc (OTC) Osc 101 kHz LCR TEST P16 P256 PHASE FILTER 1 2 10 11 Circuit Lamp Polling Circuit Vrem Vrs Cph Crs Vhvl Vfb Cdc Cuv Cign Cds lpd lpu Vdac |
Số phần tương tự - MCZ33099EG |
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Mô tả tương tự - MCZ33099EG |
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