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UC2845A データシート(PDF) 3 Page - Texas Instruments |
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UC2845A データシート(HTML) 3 Page - Texas Instruments |
3 / 7 page PARAMETER TEST CONDITIONS UC184xA\UC284xA UC384xA UNITS MIN. TYP. MAX. MIN. TYP. MAX. Error Amp Section Input Voltage VPIN 1 = 2.5V 2.45 2.50 2.55 2.42 2.50 2.58 V Input Bias Current -0.3 -1 -0.3 -2 µA AVOL 2 ≤ VO ≤ 4V 65 90 65 90 dB Unity Gain Bandwidth TJ = 25°C (Note 2) 0.7 1 0.7 1 MHz PSRR 12 ≤ VCC ≤ 25V 6070 6070 dB Output Sink Current VPIN 2 = 2.7V, VPIN 1 = 1.1V 2 6 2 6 mA Output Source Current VPIN 2 = 2.3V, VPIN 1 = 5V -0.5 -0.8 -0.5 -0.8 mA VOUT High VPIN 2 = 2.3V, RL = 15k to ground 5 6 5 6 V VOUT Low VPIN 2 = 2.7V, RL = 15k to Pin 8 0.7 1.1 0.7 1.1 V Current Sense Section Gain (Note 3, Note 4) 2.85 3 3.15 2.85 3 3.15 V/V Maximum Input Signal VPIN 1 = 5V (Note 3) 0.9 1 1.1 0.9 1 1.1 V PSRR 12 ≤ VCC ≤ 25V (Note 3) 70 70 dB Input Bias Current -2 -10 -2 -10 µA Delay to Output VPIN 3 = 0 to 2V (Note 2) 150 300 150 300 ns Output Section Output Low Level ISINK = 20mA 0.1 0.4 0.1 0.4 V ISINK = 200mA 15 2.2 15 2.2 V Output High Level ISOURCE = 20mA 13 13.5 13 13.5 V ISOURCE = 200mA 12 13.5 12 13.5 V Rise Time TJ = 25°C, CL = 1nF (Note 2) 50 150 50 150 ns Fall Time TJ = 25°C, CL = 1nF (Note 2) 50 150 50 150 ns UVLO Saturation VCC = 5V, ISINK = 10mA 0.7 1.2 0.7 1.2 V Under-Voltage Lockout Section Start Threshold x842A/4A 15 16 17 14.5 16 17.5 V x843A/5A 7.8 8.4 9.0 7.8 8.4 9.0 V Min. Operation Voltage After x842A/4A 9 10 11 8.5 10 11.5 V TurnOn x843A/5A 7.0 7.6 8.2 7.0 7.6 8.2 V PWM Section Maximum Duty Cycle x842A/3A 94 96 100 94 96 100 % x844A/5A 47 48 50 47 48 50 % Minimum Duty Cycle 0 0 % Total Standby Current Start-Up Current 0.3 0.5 0.3 0.5 mA Operating Supply Current VPIN 2 = VPIN 3 = 0V 11 17 11 17 mA VCC Zener Voltage ICC = 25mA 30 34 30 34 V UC1842A/3A/4A/5A UC2842A/3A/4A/5A UC3842A/3A/4A/5A Note 2: These parameters, although guaranteed, are not 100% tested in production. Note 3: Parameter measured at trip point of latch with VPIN2 = 0. Note 4: Gain defined as: A = ∆VPIN 1 ∆VPIN 3 ; 0 ≤ VPIN 3 ≤ 0.8V. Note 5: Adjust VCC above the start threshold before setting at 15V. Note 6: Output frequency equals oscillator frequency for the UC1842A and UC1843A. Output frequency is one half oscillator frequency for the UC1844A and UC1845A. Note 7: "Temperature stability, sometimes referred to as average temperature coefficient, is described by the equation: Temp Stability = VREF (max) − VREF (min) TJ (max) − TJ (min) . VREF (max) and VREF (min) are the maximum & mini- mum reference voltage measured over the appropriate temperature range. Note that the extremes in voltage do not necessarily occur at the extremes in tempera- ture." Note 8: This parameter is measured with RT = 10k Ω to VREF. This contributes approximately 300 µA of current to the measurement. The total current flowing into the RT/CT pin will be approximately 300 µA higher than the meas- ured value. ELECTRICAL CHARACTERISTICS (cont.) Unless otherwise stated, these specifications apply for -55 °C ≤ TA ≤ 125°C for the UC184xA; -40 °C ≤ TA ≤ 85°C for the UC284xA; 0 ≤ TA ≤ 70°C for the UC384xA; VCC = 15V (Note 5); RT = 10k; CT = 3.3nF; TA = TJ; Pin numbers refer to DIL-8. 3 |
同様の部品番号 - UC2845A |
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同様の説明 - UC2845A |
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