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GM3842AS8R Datasheet(PDF) 4 Page - Gamma Microelectronics Inc. |
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GM3842AS8R Datasheet(HTML) 4 Page - Gamma Microelectronics Inc. |
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4 / 8 page  4 GM3842A, GM3843A GM3844A, GM3845A CURRENT MODE PWM CONTROLLER Electrical Characteristics (T A = 0°C to 70°C, *VCC=15V, CT=3.3nF, RT=10k , unless otherwise specified) Parameter Symbol Condition Min Typ Max Unit Reference Section Reference output Voltage VREF TJ= 25°C, IREF= 1mA 4.9 5.0 5.1 V Line Regulation ∆V REF-V 12V < V CC < 25V 6.0 20 mV Load Regulation ∆V REF-I 1mA < I REF < 20mA 6.0 25 mV Short CirCuit output Current ISC TA=25°C -100 -180 mA Oscillator Section Oscillation Frequency f TJ= 25°C 47 52 57 KHz Frequency Change with Voltage ∆f/∆V CC 12V < V CC < 25V 0.05 1 % Oscillator Amplitude V(osc) (Peak to Peak) 1.6 V Error Amplifier Section Input Bias Current IBIAS VFB = 3V -0.1 -2 µA Input Voltage VI(EA) VPIN1 = 2.5V 2.42 2.5 2.58 V Open Loop Voltage Gain AVOL(EA) 2V < V O < 4V 65 90 dB Power Supply Rejection Ratio PSRR(EA) 12V < V CC < 25V 60 70 dB Output Sink Current ISINK(EA) VPIN2 = 2.7V, VPIN1 = 1.1V 2 7 mA Output Source Current Isource(EA) VPIN2 = 2.3V, VPIN1 = 5V -0.5 -1.0 mA High Output Voltage VOH(EA) VPIN2 = 2.3V, RL =15K to GND 5.0 6.0 V Low Output Voltage VOL(A) VPIN2 = 2.7V, RL =15K to GND 0.8 1.1 V Current Sense Section Current Sense Input Voltage Gain GV (Note 1 and 2) 2.85 3.0 3.15 V/V Maximum Input Signal VI(MAX) VPIN1 = 5V (Note 1) 1.0 1.1 V Supply Voltage Rejection SVR 12V < V CC < 25V (Note 1) 70 dB Input Bias Current IBIAS VPIN3 = 3V -3.0 -10 µA Output Section ISINK = 20mA 0.8 0.4 Low Output Voltage VOL ISINK = 200mA 1.4 2.2 V ISource= -20mA 13 13.5 High Output Voltage VOH Isource = -200mA 12 13 V Rise Time tr TJ = 25°C, CL = 1nF (Note 3) 45 150 ns Fall Time tf TJ = 25°C, CL = 1nF (Note 3) 35 150 ns |
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