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KA384X 数据表(PDF) 4 Page - Estek Electronics Co. Ltd |
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KA384X 数据表(HTML) 4 Page - Estek Electronics Co. Ltd |
4 / 12 page KA384x www.estek.com.cn Copyright @ Estek Electronics Co., Ltd Version 0.2 27 July 2011 4 Electrical Characteristics (Con.) (TA=25 °C, VCC=15V, RT=10KΩ, CT=3.3nF, TA=0 oC to +70oC, unless otherwise specified .) Symbol Parameter Test Condition Min. Typ. Max. Unit PWM Section KA3842 / KA3843 95 97 100 D(Max.) Max. Duty Cycle KA3844 / KA3845 47 48 50 D(Min.) Min. Duty Cycle - - 0 % Total Standby Current KA3843 / KA3845 - 0.13 0.3 IST Start-Up Current KA3842 / KA3844 - 0.2 0.3 ICC(OPR) Operating Supply Current Vpin3=Vpin2=0V - 13 17 mA VZ Zener Voltage ICC=25mA 30 38 - V * Adjust VCC above the start threshold before setting it to 15V. Notes: Note 1: Parameter measured at trip point of latch with Vpin2=0. Note 2: Gain defined as A=△Vpin1/△Vpin3; 0≤Vpin3≤0.8V Note 3: These parameters, although guaranteed, are not 100% tested in production. Pin Function Pin Function Description 1 COMP This pin is the Error Amplifier output and is made for loop compensation. 2 VFB This is the inverting input of the Error Amplifier. It is normally connected to the switching power supply output through a resistor divider. 3 ISENSE A voltage proportional to inductor current is connected to this input. The PWM uses this information to terminate the output switch conduction. 4 RT/CT The oscillator frequency and maximum output duty cycle are programmed by connecting resistor RT to VREF and capacitor CT to ground. 5 GND This pin is the combined control circuitry and power ground. 6 OUT This output directly drivers the gate of a power MOSFET. Peak currents up to 1A are soured and sink by this pin. 7 VCC This pin is the positive supply of the integrated circuit. 8 VREF This is the reference output. It provides charging current for capacitor CT through resistor RT. ET- |
类似零件编号 - KA384X |
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类似说明 - KA384X |
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