AC input detection and power supply protection IC Monolithic IC MM3313

Transcription

1 C input detection and power supply protection IC Monolithic IC MM333 Outline This IC is an IC providing C input detection and power supply protection for C power supplies. It provides three detection functions of overvoltage protection and output voltage drop for PFC, etc. required for C power supplies, and C input detachment, and allows a protection circuitry to be confi gured with small component count. In addition, accurate detection can be achieved by integrating the functions into an IC, and standby power can be reduced by lowering current consumption. This IC uses SOP- package and supports fl ow conditions. Features. High accuracy detection voltage :. ±% (, ). ±% (C DET). Low current consumption : 0µ typ. 3. High input impedance : Input bias current below 0.µ (CMOS input). Supports high voltage and wide input voltage range to 30. Includes a delay circuit and latch function () Package SOP-D pplications. Flat Ts (LCD, PDP). Personal computers 3. Printers C power supplies using a PFC circuit

2 Block Diagram REG REG REG (typ.) ULO INT REF. (typ.) REG DELY REG LTCH OUT REG OUT C DET / REG COMP 30n 00pF CLMP GND Pin ssignment 3 SOP- (TOP IEW) 7 3 OUT C DET GND 7 OUT

3 Pin Description Pin No. Pin Name INPUT/OUTPUT Function Internal Equivalent Circuit INPUT Power supply INPUT Power supply detection input (with latch function) INPUT 3 INPUT Power supply detection input ESD Protection Device OUT OUTPUT Power supply detection output (with latch function/open drain) OUTPUT ESD Protection Device C DET INPUT C detection input INPUT ESD Protection Device GND GND 7 OUTPUT C detection output OUTPUT OUT OUTPUT Power supply detection output ESD Protection Device

4 bsolute Maximum Ratings (Except where noted otherwise Ta= C) Item Symbol Ratings Units Storage temperature TSTG ~+0 C IN Supply voltage MX 0.3~+33 pin supply voltage IN 0.3~+30 pin supply voltage IN 0.3~+30 C DET pin supply voltage INCDET 0.3~+30 Power dissipation Pd 300 (alone) mw When in use, make sure that the voltage exceeding the maximum rating of 33 is not applied even momentarily. Recommended Operating Conditions Item Symbol Ratings Units Operating Temperature TOPR 0~+ C Operating Supply oltage OPR +~+30 pin supply voltage IN 0~+30 pin supply voltage IN 0~+30 C DET pin supply voltage INCDET 0~+30

5 Electrical Characteristics (Except where noted otherwise Ta= C, =) Item Symbol Measurement conditions Circuit Min. Typ. Max. Units Power supply current IDD 0 µ ULO Under voltage lockout (ULO) ULO =H L Under voltage lockout hysteresis voltage hysulo =H L H 00 m detection voltage IN =L H..0. detection temperature coefficient temp (guaranteed by design) ±00 ppm/ C detection hysteresis voltage hys =L H L (guaranteed by design) m pin bias current IBIN 0. µ OUT pin output delay time toutdly ms OUT pin output sink current IOUTSY OUT=0. 0 m OUT pin off leakage current IOUTDETLEK OUT= µ OUT pin "L" voltage OUTL IOUTSY=m 0. detection voltage IN =L H..0. detection temperature coefficient temp (guaranteed by design) ±00 ppm/ C detection hysteresis voltage hys =L H L m pin bias current IBIN 0. µ OUT pin output source current IOUTSO OUT=- 0 m OUT pin output sink current IOUTSY OUT=0. 0 m OUT pin "H" voltage OUTH IOUTSO=m -0. OUT pin "L" voltage OUTL IOUTSY=m 0. C DET C DET detection voltage INC C DET=H L...7 C DET pin input voltage range (DC) INCRNGE 0 30 C DET detection temperature coefficient Ctemp (guaranteed by design) ±00 ppm/ C C DET detection hysteresis voltage hysc C DET=H L H m C DET pin bias current IBINC 0. µ pin output delay time toutcdly C DET= ms pin output source current IOUTCSO =- 0 m pin output sink current IOUTCSY =0. 0 m pin "H" voltage OUTCH IOUTCSO=m -0. pin "L" voltage OUTCL IOUTCSY=m 0.

6 pplication Circuit 00k 3 OUT MM333F C DET GND C DET OUT OUT 7 00k 3 OUT C DET GND 3 MM333F C DET OUT OUT CRT CRT OUT C DET GND 3 MM333F C DET OUT OUT 7

7 Timing Chart C DET f () a (CINPUT) b (C DET) c () ref/(.) toutcdly.ms (at C DET=0 0) CDET 0 Internal filtered voltage CDET Internal filtered voltage ref/ (.) 0 ref/ (.) 0 CDET OUT CDET OUT toutcdly=(0-.) / 30.n 00pF =.ms toutcdly tout=(-.) / 30.n 00pF =3.ms When C DET exceeds, delay time becomes stable due to the internal clamp circuit. tout OUT f () d () e ( OUT) ref(.) OUT f () g () h ( OUT) ref(.) Hys(3.) ULO(3.) toutdly (0.ms) Refer to the next "pplication Circuit" for the waveform of a - g. Output L is maintained by latch

8 pplication Circuit. rchitecture example C IN C~ Primary Secondary Rectification PFC SW Transformer Rectification Leveling DC OUT DC Thermistor Output oltage Temp error signal Power OFF Power OFF Control uxiliary power supply Photocoupler Detectior DC MM333 PFC over voltage protection LTCH DC 3.3 IN PFC output drop detection C detachment detectior OUT Photocoupler Photocoupler Reset Reset Microcomputer. Circuit example (current resonant scheme) PFC circuit Switching Converter Rectifying circuit on the secondary side Leveling circuit DC OUTPUT C INPUT a PWM Contro Thermistor Power OFF Power OFF oltage detection uxiliary power supply REF f MM333 g ULO d REF.(typ.) b C DET /REF DELY LTCH h OUT e OUT c Reset Reset Microcomputer 30n 00pF Stand-off voltage 0 GND Please set the bypass capacitor for in the range of 0.~0µF depending on the condition of.

9 Characteristics (=) OUT vs OUT vs vs C DET OUT () The output is maintained by latch OUT () () () () C DET (). CH= CH= ms CH= CH= ms T / T 0.0ms 9.039Hz T / T.0ms 7.393Hz 0.0ms.0ms C DET p-p C DET 0p-p C disconnect C disconnect CH= CH= ms CH= CH= ms T / T.ms 0.733Hz T / T.ms 0.733Hz.ms.ms C DET 0p-p C disconnect C DET 30p-p C disconnect Input oltage Characteristics of C DET Delay Time 3 30 (ms) 0 0 CH C DET 0 toutcdly CH () When C DET exceeds, delay time becomes stable due to the internal clamp circuit.