Document
Voltage Regulators
AN8032
Active filter control IC
s Overview
In supplying electric power from commercial power supply to various electrical equipment, there is a possibility that the harmonic distortion generated in the power line may give obstruction to the power facilities or other electrical equipment. 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. It is most suitable for the measures against the harmonic distortion problems such as lighting equipment.
6.0±0.3 2.4±0.25 3.3±0.25
Unit: mm
8
0.5±0.1
7
23.3±0.3
6 5 4
1.5±0.25 1.5±0.25 1.4±0.3
3.0±0.3
2 1
0.3 +0.1 –0.05
s Features
• Self-excited peak current mode is adapted. SIP009-P-0000C • Built-in protection circuit for preventing the overvoltage generated under a small load • Easy constant setting with enlarged dynamic range of multiplier and error amplifier. • Overvoltage protection terminal separately set to pass the short test of the safety standards • Using totem pole output circuit which allows the power MOSFET to be directly driven. • Built-in low voltage protection circuit which ensures the on-resistance during the power MOSFET operation. • Timer circuit is built in for realizing automatic start.
s Applications
• Lighting equipment and switching power supply equipment
s Block Diagram
VBTH One shot 2.5 V Under voltage Over voltage clamper clamper U.V.L.O. comp. VREF 10 V/8 V 9 6 VCC VB
Timer
Drive
8
VOUT
Current comp. MPI 2 Multiplier
OVP comp. 2.6 V 5 1 Error amp. 2.5 V 2.5 V 4
OVP CS EI
7
GND
EO
3
30°
3
2.54
9
1
AN8032
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 Symbol CS MPI EO EI OVP VB GND VOUT VCC Description Comparator input pin Multiplier input pin Error amplifier output pin / multiplier input pin Error amplifier inverted-input pin Overvoltage detection pin Transformer-reset detection pin Grounding pin Output pin Power supply-voltage pin
Voltage Regulators
s Absolute Maximum Ratings
Parameter Supply voltage CS allowable application voltage MPI allowable application voltage EI allowable application voltage Output allowable current Peak output current VB allowable flow-in current VB allowable flow-out current Power dissipation Operating ambient temperature Storage temperature
* *
Symbol VCC VCS VMPI VEI IO IOP IBI IBO PD Topr Tstg
Rating 35 − 0.5 to +7 − 0.5 to +7 − 0.5 to +7 ±150 ±1 +5 −5 874 −30 to +85 −55 to +150
Unit V V V V mA A mA mA mW °C °C
Note) *: Expect for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
s Recommended Operating Range
Parameter Supply voltage Symbol VCC Range 0 to 34 Unit V
s Electrical Characteristics at Ta = 25°C
Parameter Error detection feedback threshold voltage 1 Error detection low-level output voltage Symbol VEITH1 VEOL IEO = 0 mA, VEI = 5 V IEI = 0 mA, VEI = 0 V VEI = 0 V VEI = 0 V, VEO = 1 V Conditions Min 2.35 5.0 0.25 Typ 2.50 1.0 5.7 − 0.3 0.50 Max 2.65 1.6 −1.0 0.75 Unit V V V µA mA
Error detection high-level output voltage VEOH Error detection input bias current Error detection output supply current IEI IEO
2
Voltage Regulators
s Electrical Characteristics (continued) at Ta = 25°C
Parameter Symbol VEO = 5 V VEO = 5 V VMPI = 0 V Conditions Min 4.0 4.8 1.0 1.2 50 IB = 5 mA IB = −5 mA VCS = 0 V 7.0 − 0.3 2.45 70 IOUT = 100 mA IOUT = −100 mA 9.2 9.2 7.0 dVCC = VCCST − VCCSP VCC = 7 V VCC = 12 V 1.75 40 Typ 4.5 5.4 1.2 −1.5 1.5 100 7.5 − 0.2 3.5 − 0.5 2.60 100 0.9 10.2 0.8 10.0 8.0 2.00 80 6.0
AN8032
Max 1.4 −3.0 1.8 200 8.0 0 15 −2.0 2.75 130 1.5 1.5 10.8 9.0 2.50 120 10.0
Unit V V 1/V µA V mV V V mV µA V mV V V V V V V µA mA
Multiplier input D-range (upper limit) VMPIH Multiplier output D-range (upper limit) VMPOH Multiplier gain Multiplier input bias current Coil detection input threshold voltage Coil detection hysteresis width Coil detection high-level clamp voltage Coil detection low-level clamp voltage GMP IMPI VBTH dVB VBH VBL
Current detection input offset voltage VCSOFF Current detection input bias current Overvoltage detection input threshold voltage VOVP − VEITH1 Low-level output voltage High-level output voltage Standby output voltage U.V.L.O. start voltage U.V.L.O. stop voltage U.V.L.O. start - stop voltage difference Standby current Operation current without load • Design reference data ICS VOVP VOUTL VOUTH
VOUTSTB IOUT = 10 mA VCCST VCCSP dVCC ICCSTB ICC
Note) The characteristics listed below are reference values based on the IC design and are not guaranteed.
Parameter Error detection feedback threshold voltage 2 Error detection open-loop gain Error detection gain band width
Symbol VEITH2 GAV fBW VEO = 5 V VEO = 5 V
Conditions Ta = −25°C to +85°C
Min 2.3
Typ
Max 2.7
Unit V dB MHz V V ns ns ns ns µs
85 1.0 0 0 200 500 VCC = 12 V, VOUT = 10% → 90% VCC = 12 V, VOUT = 90% → 10% 50.