CM6800 Champion Microelectronic Corp., CM6800 Datasheet
CM6800
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CM6800 Summary of contents
Page 1
... GENERAL DESCRIPTION The CM6800 controller for power factor corrected, switched mode power suppliers. Power Factor Correction (PFC) allows the use of smaller, lower cost bulk capacitors, reduces power line loading and stress on the switching FETs, and results in a power supply that fully compiles with IEC-1000-3-2 specifications ...
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... Buffered output for the internal 7.5V reference REF 15 V PFC transconductance voltage error amplifier input FB PFC transconductance voltage error amplifier output 16 VEAO 2004/02/11 Rev. 1 TART- P URRENT Description Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER Operating Voltage Min. Typ. Max 1.2 3.9 ...
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... BLOCK DIAGRAM (CM6800) 16 VEAO - 0.3V + LOW POWER DETECT VFB GMv 15 - 3.5K . 2.5V + IAC 2 GAIN VRMS MODULATOR 4 ISENSE 3 RAMP1 7 350 RAMP2 8 SW SPST PWM CMP - 1.5V + VDC 6 Vcc 20uA 350 SPST SW SPST SW SPST VREF DC ILIMIT 9 2004/02/11 Rev. 1 TART- P URRENT 1 IEAO VCC OVP VCC + 17 ...
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... VCC UVLO Package 16-Pin PDIP (P16) 16-Pin Wide SOP (S16) 16-Pin PDIP (P16) 16-Pin Wide SOP (S16) 16-Pin PDIP (P16) 16-Pin Wide SOP (S16) 16-Pin PDIP (P16) 16-Pin Wide SOP (S16) CM6800/1 C OMBO VCC VREF 14 POWER FACTOR CORRECTOR VCC MPPFC PFC OUT ...
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... CC Current Error Amplifier ( VEAO = 3.75V NONINV INV Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER Min. Max 4.5 -5 0.7 VCC + 0.3 VCC + 0.3 VCC + 0 1.5 150 -65 150 -40 125 260 80 105 CM6800/1 Min. Typ 2.45 2.5 -1.0 -0.05 5.8 6.0 0 -15 4.0 4.25 1.0 C OMBO Units V ...
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... 3.3V RMS µ 100 A AC µ 250 1.1V RMS Oscillator T = 25℃ A 11V < V < 16.5V CC Line, Temp V = 0V, V RAMP2 RAMP1 Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER CM6800/1 Min. Typ. - 2.70 2.77 230 0.2 0.3 17.5 17.9 1.40 1.5 2.65 2. GND FB 0.4 0.5 -1.10 -1.00 20 100 250 0.95 1.0 250 2 ...
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... OUT C = 1000pF L Supply V = 12V 14V CM6800/1 CM6800/1 pin – (VEAO – 0.625)] ; VEAO OFFSET AC Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER CM6800/1 Min. Typ 1mA 7.4 7 0℃~70℃ -40℃~85℃ 0 0-44 0- 0.4 15 ...
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... Rev. 1 TART- P URRENT 3 ) Transconductance 4 Champion Microelectronic Corporation PFC/PWM C ONTROLLER 100 -500 0 ISENSE(m V) Current Error Amplifier (g ) Transconductance mi 2.2 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0 0.5 1 1.5 2 2.5 3 3.5 VRMS (V) Gain − SENSE OFFSET = Gain I AC CM6800/1 C OMBO 500 4 4.5 5 Page 8 ...
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... PFC Section Gain Modulator Figure 1 shows a block diagram of the PFC section of the CM6800/1. The gain modulator is the heart of the PFC this circuit block which controls the response of the current loop to line voltage waveform and frequency, rms line voltage, and PFC output voltages. There are three inputs to the gain modulator ...
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... R 1.414)/(2 x 200) = 0.226 ohm. PFC OVP In the CM6800/1, PFC OVP comparator serves to protect the power circuit from being subjected to excessive voltages if the load should suddenly change. A resistor divider from the high voltage DC output of the PFC is fed to VFB. When the voltage on VFB exceeds 2 ...
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... The gain vs. input voltage of the CM6800/1’s voltage error amplifier, V specially shaped non-linearity such that under steady-state operating conditions the transconductance of the error amplifier local minimum. Rapid perturbation in line or ...
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... PFC switching frequency. Therefore, the boost inductor can be reduced 6 times without disturbing the stability. Therefore, the capacitor of the will be around 283nF. FILTER Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER and I S SENSE SENSE conditions, it will have a large voltage cross Rs which is the sensing resistor of the PFC boost converter ...
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... As in current mode operation, the voltage error amplifier is included in the PWM stage of the CM6800/1, as this function is generally performed on the output side of the PWM’s isolation boundary. To facilitate the design of optocoupler feedback circuitry, an offset has been built into the PWM’s RAMP2 input which allows V command a zero percent duty cycle for input voltages below 1 ...
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... CM6800/1 itself (5mA, max.) plus the current required by the two gate driver outputs. EXAMPLE: With a wanting voltage called, V and the CM6800/1 driving a total gate charge of 90nC at OK comparator at IN 100kHz (e.g. 1 IRF840 MOSFET and 2 IRF820 MOSFET), the gate driver current required is: ...
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... With such synchronized switching, the ripple voltage of the first stage is reduced. Calculation and evaluation have shown that the 120Hz component of the PFC’s output ripple voltage can be reduced by as much as 30% using this method. Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER Page 15 C OMBO ...
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... Q1 R26 Q2N2222 18k MUR1100 22 1N4148 Q2 C23 R23 R24 470p Q2N904 75 22 R25 10k VFB C55A C41 R58 C43 IEAO U2 CM6800/01/ VEAO IEAO VEAO 2 15 IAC VFB VREF 3 14 VREF I-SENSE VREF 4 13 VCC C54 VCC VRMS VCC C52 C53 ...
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... Q1 R26 Q2N2222 18k MUR1100 22 1N4148 Q2 C23 R23 R24 470p Q2N904 75 22 R25 10k VFB C55A C41 R58 C43 IEAO U2 CM6800/01/ VEAO IEAO VEAO 2 15 IAC VFB VREF 3 14 VREF I-SENSE VREF 4 13 VCC C54 VCC VRMS VCC C52 C53 ...
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... PACKAGE DIMENSION PIN 1 ID PIN 1 ID 2004/02/11 Rev. 1 TART- P URRENT 16-PIN PDIP (P16) 16-PIN SOP (S16), 0.300” Wide Body θ Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER θ Page 18 C OMBO ...
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... +886-3-567 9909 http://www.champion-micro.com 2004/02/11 Rev. 1 TART- P URRENT IMPORTANT NOTICE Sales & Marketing 11F, No. 306-3, Sec Tung Rd., Hsichih, Taipei Hsien 221 Taiwan, R.O. +886-2-8692 1591 +886-2-8692 1596 Champion Microelectronic Corporation CM6800/1 PFC/PWM C ONTROLLER Page 19 C OMBO ...