L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim M62502FP P ces;Thametri i r Not me pa So PWM IC for the synchronized deflection system control GENERAL DESCRIPTION PIN CONFIGURATION(TOP VIEW) The M62502 is a controller for a deflection system of CRT display monitors. It performs a stable PWM control over a wide fluctuation of external signals, thanks to the built-in trigger mode oscillator. The IC is suitable for an application to a high voltage drive and a horizontal output correction of CRT monitors because of its following circuits and functions; • Under Voltage Lock Out circuit (UVLO) • Soft-start function PWM OUT 1 2 TIN 3 15 VREF M62502FP Vcc 16 GND Cosc 4 Cagc1 5 FEATURES • PWM output synchronized with external signals • Wide PWM control frequency 15kHz to 150kHz • Soft start function • Low voltage malfunction protection circuit start Vcc > 9V stop Vcc < 6V Ragc 6 14 DTC 13 FB 12 IN – 11 IN + Cagc2 7 10 Duty 2fh 8 9 DOUT 16P2N-A Outline APPLICATION • C R T display monitor BLOCK DIAGRAM GND VREF 16 15 VCC DTC FB 14 IN- IN+ Duty Adj 12 11 10 13 VREF DRIVE OUTPUT 9 Duty cont Amp Comp Wind comp Comp UVLO GEN AGC GEN 1 PWM OUT 2 3 4 5 VCC TIN COSC CAGC1 (1/7) 6 RAGC AGC 7 CAGC2 Edge detection 8 2fh L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim M62502FP P ces;Thametri i r Not me pa So PWM IC for the synchronized deflection system control Terminal Number and The facility PIN No. Symbol Functional Description 1 PWM OUT PWM output 2 VCC Power supply 3 TIN Trigger input 4 COSC Setting oscillating frequency 5 Cagc1 AGC setting 6 RAGC AGC Current setting resistor connected to this terminal 7 Cagc2 AGC setting 8 2fh Double velocity reshuffle 9 DOUT Drive output 10 Duty Duty regulation 11 IN+ Positive input of Op-Amp. 12 IN- Negative input of Op-Amp. 13 FB Output of Op-Amp. 14 DTC Dead time control (Soft start function) 15 VREF Output of reference voltage (5V) 16 GND Ground Absolute Maximum Rating (Ta=25°C,unless otherwise noted) Symbol Parameter Conditions Ratings Unit VCC Supply voltage 15 V VOUT Output voltage 15 V IOUT Output current ±100 mA Vd Drive output voltage 15 V Id Drive output current 20 mA VICM Error amplifier input common mode voltage range -0.3 to VCC V VID Error amplifier input common mode voltage VCC V Pd Power dissipation 650 mW K Thermal derating ratio 5.2 mW/°C Topr Operating ambient temperature Tstg Storage temperature Ta≥25°C (2/7) -20 to +75 °C -40 to +150 °C L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim P ces;Thametri i r Not me pa So M62502FP PWM IC for the synchronized deflection system control ELECTRICAL CHARACTERISTICS (Vcc=12V, TIN=40kHz, Ta=25°C, unless otherwise noted) Block Reference voltage section Error Amp. Oscillator PWM output section UVLO section Duty adj section Symbol VCC ICC VREF Reg-in Reg-L TCVREF IREF MAX IS VIO IIb IIO VICM AV SR VOR Isink Isourse fOSC VOSC H VOSC L VTIN H VTIN L Vsat L Vsat H VTH ON VTH OFF IDuty Test conditions Range of power supply Circuit current Reference voltage Input regulation Load regulation Min 4.80 Maximum reference current Short-circuit current Input offset voltage Input bias current Input offset current 70 Slew rate Output voltage range Output sink current Output source current Oscillation frequency High level of TIN Low level of TIN IO=100mA IO=-100mA ON threshold voltage OFF threshold voltage fh terminal current fh reshuffle voltage VDuty=2.5V VDuty=3V Id=10mA VDO=12V Vhf=5V 9.5 8.0 5.4 -6.5 -10 150 VCC 1.0 1.4 10.0 6.6 - - 330 0.5VREF V mA mA kHz V V V V V V V V µA µsec 0.4 0.4VREF (3/7) 0.7 10.5 9.0 6.0 -1.3 5.0 mA mA mV nA nA V dB VREF-1.5 2.5 V mA V mV mV V/µs 3.5 1.5 The oscillator waveform lower limit voltage UVP terminal input current 110 4 15 Unit %/°C 100 VCC-2 0.3 10 The oscillator waveform bound voltage Input offset voltage 5.20 10 20 7 Open loop transmission gain Output saturation voltage H Max 14 25 5.00 1.0 2.0 0.01 -30 -30 -100 -100 -0.3 Common mode input voltage range Output saturation voltage L Limits Typ VCC OFF Output off mode Reference voltage thermal coefficient Input current Duty max Maximum ON duty VUVPO IIN UVP fh reshuffle Ifh section Vfh UVP section Parameter 1.0 430 0.6VREF V µA µA V L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim P ces;Thametri i r Not me pa So M62502FP PWM IC for the synchronized deflection system control Terminal functional description and equivalent circuit Terminal No. 1 2 Symbol PWM OUT Vcc Function and internal circuit PWM output • PWM output synchronized with the TIN input is available. • Output "H" level = 10.5V typ (The output current:-100mA,Vcc=12V) • Output "L" level = 0.7V Typ (The output current:+100mA,Vcc=12V) 2 Vcc 1 PWM OUT 16 GND Power supply Vcc 15 VREF 2 Trigger input • Frequency range 15kHz to 150kHz • It is taken on a leading edge. TIN TIN input waveform 3 TIN 3 MIN 2.5V MAX 1.0V 16 4 Cosc 5 Cagc1 GND A saw-wave oscillator timing setting (Cosc) • A saw-wave is generated by connecting the capacitor between pin4 and GND. • Recommended capacitor value is 1000pF. Setting AGC sensitivity (Cagc) • The sensitivity of AGC circuit is set by connecting the capacitor between pin5 and GND. • Recommended capacitor value is 1µF. VREF Cosc 15 4 ~ ~ ~ GND (4/7) 16 5 Cagc1 L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim P ces;Thametri i r Not me pa So Terminal No. M62502FP PWM IC for the synchronized deflection system control Symbol Function and internal circuit VREF 6 Ragc AGC current setting • The resistor is connected between pin6 and GND for setting AGC current flowing in DOUT circuit. Ragc 6 VREF Setting AGC sensitivity • The sensitivity of AGC is set by connecting the capacitor between pin7 and GND. • Recommended capacitor value is 1µF. 7 Cagc2 Cagc2 7 2fh ~ 8 Frequency selection VREF • The frequency of drive output is alternated between just(fh) and doubled(2fh) one. 2fh 8 OPEN, GND : fh VREF : 2fh ~ ~ Drive output • Open collector circuit. 9 VREF 9 DOUT DOUT VREF The duty adjustment of drive output 10 Duty Duty (5/7) 10 L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim P ces;Thametri i r Not me pa So Terminal No. M62502FP PWM IC for the synchronized deflection system control Symbol Function and internal circuit Vcc 11 IN+ 2 Positive input of Op-Amp (IN+) Negative input of OP Amp (IN-) 12 IN- IN+ 11 12 IN- Output of Op-Amp (FB) Dead time control (DTC) • A soft start function is available during power-on by adopting a time constant. 13 FB 15 VREF 16 GND DTC 14 Cosc FB 13 14 4 DTC PWM comparator section Reference voltage terminal • 5V is output via this terminal. A current capability is 5mA. 15 Vcc 2 VREF 15 VREF + GND 16 16 GND • Ground (6/7) L Yificatioon.change. A I N pec ct t MITSUBISHI (Dig./Ana. INTERFACE) ls bje fina e su LIM ot a its ar E n R is is c lim M62502FP P ces;Thametri i r Not me pa So PWM IC for the synchronized deflection system control M62502 application IN- IN+ R2 VR1 C2 C3 R1 C5 C4 15 14 13 Vcc R5 R4 D1 16 Duty R3 12 11 DOUT 10 9 VCC Duty cont Amp VREF Comp Wind comp Comp UVLO GEN AGC GEN AGC Edge detection Vcc 1 2 3 4 5 Cosc Cagc1 PWM OUT 6 Ragc 7 8 Cagc2 2fh TIN C1 C1,C2 ----------- These capacitors are for stabilization of Vcc and VREF. VR1 ----------- It is decided considering a current capability of VREF. (The capability is about 5mA.) Recommended value is around 10kΩ C3,D1 ----------- They are for a soft start function. A time constant is decided considering VR1. Cagc1,2 ----------- These capacitors are for stabilization of AGC circuit. A larger capacitor improves a stability of the system, however a system response is degraded. Recommended capacitor value is around 1µF. Cosc ---------- This capacitor is for the saw-wave generation. Recommended capacitor value is around 1000pF. R1,R2,R3,R4 ----- They are for the gain setting of the error Amp. R2 should be several kΩ to dozens of kΩ C4,C5 to set a voltage gain 20dB to 40dB at f = 1kHz, so that the feed back loop is stable. When the voltage gain is too low, it causes jitter. Recommended values of C4, C5 and R1 are ; C4 = dozens of pF to several hundreds pF, C5 = several thousands pF to tens of thousands pF, R1 = dozens of kΩ to several hundreds kΩ. Ragc ----------- This resistor is for the AGC setting of DOUT. Recommended value is 27kΩ. R5 ----------- It is a pull-up resister of DOUT output, because DOUT is configured by the open collector circuit. Recommended value is several kΩ. (7/7)