ET-KA7500 SWITCHMODE Pulse Width Modulation Control Circuit The KA7500 is a fixed frequency, pulse width modu lation control circuit designed primarily for SWITCHMODE power supply control. • • • • • • Complete Pulse Width Modulation Control Circuitry On– Chip Oscillator with Master or Slave Operation On– Chip Error Amplifiers On– Chip 5.0 V Reference Adjustable Deadtime Control Uncommitted Output Transistors Rated to 500 mA Source or Sink Output Control for Push– Pull or Single– Ended Operation Undervoltage Lockout • • N SUFFIX PLASTIC 16 1 ORDERING INFORMATION KA 7500 Plastic Chip KA 7500 TA = - 20° to +85°C LOGIC DIAGRAM 5 6 PIN ASSIGNMENT 13 output control dead time control oscillator 4 pulce steering flip flop error amp 1 1 2 PWM comparator error amp 2 8 & T 9 11 reference regulator 16 10 15 3 noninv. input inv. input feedback dead time control CT RT gnd collector 1 1 16 2 15 3 KA 14 7500 5 12 6 11 7 10 8 9 noninv. input inv. input ref. output output control Vcc collector 2 emitter 2 emitter 1 7 12 14 Pin 7 = GND Pin 12 = Vcc 1 BEIJING ESTEK ELECTRONICS CO.,LTD ET-KA7500 MAXIMUM AND RECOMMENDED OPERATING CONDITIONS Recommended Symbol Parameter operating conditions VCC Supply Voltage VI Amplifier Input Voltage VO Collector Output Voltage Collector Output Current (Each Transistor) Storage Temperature Range IOC T T Max 7 40 41 V -0.3 VCC-2 VCC+0.3 V 40 41 V 200 250 mA 150 °C -20 Uregin Input regulation Uregout Output regulation ΔVref Output voltage change with temperature Short circuit output current ISC fosc σfosc σfosc(ΔV) σfosc(ΔТ) IIB(2T) DCmax VTHD1 I0=1.0mA VCC=15V VCC=7… 40V I0=1.0mA I0=1… 10 mA VCC =15V I0=1mA VCC =15V Vref=0 tsc< 1s VCC=15 V Frequency C=0.01μF, R=12kΩ VCC=15V V(03)=0.7V Standard Deviation VCC=15V V(03)=0.7V of Frequency * Frequency Change VCC=7…40 V V(03)=0.7V with Voltage Frequency Change C=0.01μF, RT=12kΩ with Temperature VCC=15V V(03)=0.7V Input bias current VI=0…5.25V (pin 4) VCC=15V V(03)=0.7V Maximum duty cycle VI(04)=0V VCC=15V (each output) V(03)=0.7V DCmax=0 Input threshold VCC=15V voltage (pin 4) (Zero Duty Cycle) V(03)=0.7V 2 Max 85 ELECTRICAL CHARACTERISTICS (TA= -20 …+85°C, f =10kHz) Test Conditions Symbol Parameter Output voltage Min Unit Min -65 Operating Free-Air Temperature Range Vref Maximum ratings °C Min Max 4.75 5.25 Temperature,° C -20…+85 - 25 25 mV - 15 25 mV - 1.0 -20…+85 % - 50 mA 6.0 14 kHz - 15 % - 10 25 % - 2.0 -20…+85 % - -10 μA 45 - % - 3,3 V Value Unit V BEIJING ESTEK ELECTRONICS CO.,LTD ET-KA7500 VTHD2 Input threshold voltage (pin 4) (Maximum Duty Cycle) 0 Dcmax VCC=15V V(03)=0.7V - V . Symbol trc Parameter VIO Output voltage rise time (CommonEmitter) Output voltage fall time (CommonEmitter) Output voltage rise time (EmitterFollower) Output voltage fall time (EmitterFollower) Input threshold voltage (pin 3) Input sink current (pin 3) Input offset voltage IIO Input offset current IIB Input bias current tfc trf tff VTHP II VICRL VICRH AVOL fb CMRR IOL IOH IC(off) Low Input common mode voltage range High Input common mode voltage range Open loop voltage amplification Test Conditions Value Temperature,° C -20…+85 Unit Min Max VCC=15V V(03)=2.0V - 200 VCC=15V V(03)=2.0V - 100 ns VCC=VC=15V V(03)=2.0V - 200 ns VCC=VC=15V V(03)=2.0V - 100 DCmax=0 VCC=15V VCC=15V V(03)=0.7V VCC=15V VO(03)=2.5V VCC=15V VO(03)=2.5V VCC=15V VO(03)=2.5V VCC=7…40V - 4.5 V 0.3 - mA - 10 mV - 250 nA - 1 μA -0.3 - V VCC=7…40V VCC -2 - V -20…+85 ns ns ΔV0=3V VCC=15V VO=0.5…3.5V VCC=15V 70 - dB 100 - kHz Vcc=40V 65 - 25 dB VCC=15V V0(03)=0.7V 0.3 - -20…+85 mA Output source current (pin 3) VCC=15V V0(03)=3.5V -2.0 Collector off-state current VCE=VCC=40V Unity-gain bandwidth Common mode rejection ratio Output sink current (pin 3) - 3 mA 100 μA BEIJING ESTEK ELECTRONICS CO.,LTD ET- KA7500 IE(off) VSAT(C) VSAT(E) Emitter off-state current Collector - Emitter saturation voltage (Common-Emitter) Collector - Emitter saturation voltage (Emitter-follower) VCC=VC=40V VE=0V VCC=15V VE=0V V0(03)=3.0V IC=200mA VCC=VC=15V -- 200mA IE=V0(03)=3.0V IOCH Output control input VCC=15V V0(03)=0.7V current ICC15 Standby Supply Current at VCC 15V VCC=15V - -100 μA - 1.3 V - 2.5 25 2.9 -20…+85 - 3.5 25 - 10 V mA mA . Symbol ICC40 ICCA Parameter Standby Supply Current at VCC 40V Average Supply Current Test Conditions Value Min Max VCС=40V - 15 Temperature,° C 25 VCC=15V V0(03)=0.7V V0(04)=2.0V - 17 -20…+85 Unit mA mA Standard deviation is a measure of the statistical distribution about the mean as derived from the formula N σ= ∑ ( Xn − X ) 2 n =1 N −1 4 BEIJING ESTEK ELECTRONICS CO.,LTD