an8032 Panasonic Corporation of North America, an8032 Datasheet
an8032
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an8032 Summary of contents
Page 1
... The use of active filter is one of the methods to solve the harmonic distortion problems. The AN8032 is a monolithic IC which incorporates the control and protection functions into one package so that the active filter can be constructed easily most suitable for the measures against the harmonic distortion problems such as lighting equipment ...
Page 2
... AN8032 Pin Descriptions Pin No. Symbol 1 CS Comparator input pin 2 MPI Multiplier input pin 3 EO Error amplifier output pin / multiplier input pin 4 EI Error amplifier inverted-input pin 5 OVP Overvoltage detection pin 6 V Transformer-reset detection pin B 7 GND Grounding pin 8 V Output pin ...
Page 3
... CC CC Symbol Conditions EITH2 MPIL MPOL OVP OUT OUT td TIM AN8032 Min Typ Max Unit 4.0 4.5 V 4.8 5.4 V 1.0 1.2 1.4 1/V 1.5 3.0 A 1.2 1.5 1 100 200 mV 7.0 7.5 8.0 V 0 0.5 2.0 A 2.45 2 ...
Page 4
... AN8032 Terminal Equivalent Circuits Pin No. Equivalent circuit 1 Approx. 7 high-speed converter 1 2 Approx. 7 Approx. 7.1 V Approx. 7.1 V Error amplifier output 3 4 Approx. 7.1 V Approx. 7 Error amplifier input 5 Approx. 7.1 V Approx. 7.1 V Overvoltage protection input 4 Description CS: The input terminal of comparator which detects the current value flowing in power MOSFET. ...
Page 5
... Inside bias one terminal with internal connection in order to (Appox. 7.1 V) greatly decrease the common impedance. This double-functioning terminal monitors the supply voltage, and has start/stop operation thresh- Power old. MOSFET drive block AN8032 Description I ...
Page 6
... Operation descriptions 1. Normal control 1) Application outline As shown in figure 1, the standard application of the AN8032 is a booster chopper circuit, which inputs the voltage rectified from the commercial supply of 100 V/200 figure 1) and outputs the DC voltage of 400 figure 1). It controls so that the input current proportional to the input voltage ( figure 1) could be flown. ...
Page 7
... OUT The voltage which is divided from the output voltage of chopper circuit (E resistor is amplified by the error amplifier of the AN8032 (Input to noninverting input terminal (EI terminal)) and input to another multiplier input (EO terminal, which also functions as output for error amplifier). (3) Multiplication of input voltage and output voltage The signals input to the multiplier are multiplied and outputted from the multiplier ...
Page 8
... AN8032 Application Notes (continued) [2] Operation descriptions (continued) 1. Normal control (continued) 2) Control outline description (Refer to figure 2 and figure 3.) (continued) (4) Switching device current The voltage generated in the current detection resistor which is connected to the switching device (power MOSFET) is detected at the CS terminal. (for the above resistor, low resistance value is selected, considering the power dissipation) ...
Page 9
... Power MOSFET V terminal input voltage B V BTH (1.5 V typ the chopper circuit, and the switching device current. OUT terminal through resistor. B terminal voltage exceeds the withstanding voltage. B terminal voltage swings to negative voltage: generally, in the B OFF Figure 4. V terminal description B AN8032 OFF 9 ...
Page 10
... I D SDB Clamp upper limit voltage Figure 5. Explanation of V operation B AN8032 : R too large Consumption current becomes small, however extended by the delay amount because of low speed. value OFF B value prop too small Speed is high, however, consumption current B is small and undershoot tends to be generated easily ...
Page 11
... The input D-range of the multiplier is from 4.5 V typical and output D-range is from 5.4 V typical. AN8032 be- P A-point voltage B-point voltage Filter Figure 6. CS terminal explanation AN8032 Delay capacitor ...
Page 12
... V OUT For the drive circuit, the AN8032 employs the totem pole type by which the power MOSFET can be directly driven. Since the peak output current the TO-220 class power MOSFET can be driven. For the TOP-3 class, the buffer circuit should be added outside because its capability is not sufficient for that class ...
Page 13
... CC For the AN8032, the following method is used to suppress the interference between the two power supply lines : The supply voltage supply line of the power system and that for the signal line are sepa- rately provided in the IC chip and they are put to- gether when wired to the pin of the package ...
Page 14
... AN8032 Application Notes (continued) [2] Operation descriptions (continued) 2. Protection circuit 1) Timer In control of this IC, the chopper circuit does not start unless the first on-signal is input to the switching device. The chopper circuit does not re-start, if the turn-on timing of switching device is missed due to some abnormality. ...
Page 15
... In order to prevent the occurrence of such problem, the AN8032 has the built-in overvoltage protec- tion circuit, so that the number of component to be added to the external part is drastically reduced. ...
Page 16
... Protection circuit (continued) 2) Overvoltage protection (continued) (2) Description of overvoltage protector operation With respect to the AN8032 IC, the input of the error amplifier which detects the output voltage is provided separately from the input of the overvoltage protection comparator. This is the point which differs from the AN8031. ...
Page 17
... However, it does not immediately come out of the full-power-operation (due to control delay of the entire feedback system) even when the proper output voltage is obtained, causing the overshoot of output voltage. The AN8032 overvoltage protector operates even at operation starts and prevents the worst cases such as damage of used parts. (Refer to figure 12.) Operation start ...
Page 18
... Note) The OVP terminal is arranged beside the EI terminal after taking the board pattern design into consideration. 18 terminal is used in common for both OUT Output voltage monitor EI Overvoltage EO detection CS AN8031 V OUT Output voltage EI monitor AN8032 EO OVP Overvoltage detection CS Voltage Regulators and SBD Separately require external components Excessively large overvoltage, generated when the short circuit testing, can not be suppressed ...
Page 19
... Voltage Regulators Application Circuit Example Application circuit Load OUT 7 GND AN8032 19 ...
Page 20
... AN8032 Application Circuit Example (continued) Normal operation waveforms Horizontal axis 1 ms/div Measuring point 140 V A (EIN (MPI OUT 0.8 V (CS 2 (EI 500 V G (EO) 100 V 20 Voltage Regulators 10 ms/div 140 ...
Page 21
... Application Circuit Example (continued) Waveforms at start Horizontal axis 20 ms/div Measuring point 1 (CS 400 V G (EO) 100 V Waveforms at stop Horizontal axis 20 ms/div Measuring point E 0.8 V (CS 400 V G (EO) 100 V (Conditions) Input voltage : 100 V (AC) Output voltage : 400 V (DC) Output current : 200 mA (resistive load AN8032 21 ...