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PJ494 Switchmode Pulse Width Modulation Control Circuit 2-11 2002/11.rev.A Parameter Symbol Min Max Unit Supply voltage Vcc 7 40 Amplifier input voltage Vi -0.3 Vcc-2 Collector output voltage Vo 40 V Collector output current(each transistor) 200 Current into feedback terminal 0.3 mA Timing capacitor CT 0.47 10000 nF Timing resistor RT 1.8 500 K Ω Oscillator frequency 1 300 KHz Operating free-air temperature TA 0 70 ℃ Vcc=15V, f=10KHz (unless otherwise noted). REFERENCE SECTION Value Parameter Test Conditions* Min Typ Max Unit Output voltage(Vref) Io=1mA 4.75 5 5.25 V Line regulation Vcc=7V to 40V -- 2.0 25 Load regulation Io=1mA to 10mA -- 3.0 15 mV Output voltage change with temperature ∆TA=MIN to MAX -- 0.2 1 % Short-circuit output current*** Vref=0 15 35 75 mA OSCILLATOR SECTION Value Parameter Test Conditions* Min Typ Max Unit Frequency CT=0.001µF,RT=30KΩ -- 40 -- KHz Standard deviation of frequency**** CT=0.001µF,RT=30KΩ -- 3.0 -- Frequency change with voltage Vcc=7V to 40V, TA=25℃ -- 0.1 -- Frequency change with temperature*** CT=0.001µF,RT=30KΩ ∆TA=MIN to MAX -- -- 12 % ERROR AMPLIFIER SECTION Value Parameter Test Conditions* Min Typ** Max Unit Input offset voltage Vo=(pin 3)=2.5V -- 2.0 10 mA Input offset current Vo=(pin 3)=2.5V -- 5.0 250 nA Input bias current Vo=(pin 3)=2.5V -- -0.1 -1.0 µA Common-mode input voltage range Vcc=7V to 40V -0.3 toVcc-2 V Open-loop voltage amplification ∆Vo=3V,RL=2KΩ,Vo=0.5 to 3.5V 70 95 -- dB Unity-gain bandwidth RL=2KΩ,Vo=0.5 to 3.5V -- 800 -- KHz Common-mode rejection ratio ∆Vo=40V, TA=25℃ 65 90 -- dB Power Supplu Rejection Ratio ∆Vcc=33V,Vo=2.5V,RL=2KΩ -- 100 -- dB Output sink current (pin 3) VID=-15mV to -5V,V(PIN3)=0.7V 0.3 0.7 -- mA Output source current (pin 3) VID=15mV to 5V,V(PIN3)=3.5V 2.0 -4.0 -- mA OUTPUT SECTION Value Parameter Test Conditions Min Typ Max Unit Collector off-state current VCE=40V,VCC=40V -- 2.0 100 Emitter off-state current Vcc=Vc=40V, VE=0 -- -- -100 µA Common-emitter VE=0, Ic=200mA -- 1.1 1.3 Collector-emitter saturation voltage Emitter-follower Vc=15V, IE=-200mA -- 1.5 2.5 V Output control input current VI=Vref -- -- 3.5 mA RECOMMENDED OPERATING CONDITIONS ELECTRICAL CHARACTERISTICS OVER RECOMMENDED OPERATING FREE-AIR TEMPERATURE |
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