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UC3841N Datenblatt(PDF) 3 Page - Texas Instruments |
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UC3841N Datenblatt(HTML) 3 Page - Texas Instruments |
3 / 11 page PARAMETER TEST CONDITIONS UC1841 / UC2841 UC3841 UNITS MIN TYP MAX MIN TYP MAX Ramp Generator Ramp Current, Minimum ISENSE = -10 µA -11 -14 -11 -14 µA Ramp Current, Maximum ISENSE = 1.0mA -0.9 -.95 -0.9 -.95 mA Ramp Valley 0.3 0.4 0.6 0.3 0.4 0.6 V Ramp Peak Clamping Level 3.9 4.2 4.5 3.9 4.2 4.5 V Error Amplifier Input Offset Voltage VCM = 5.0V 0.5 5 2 10 mV Input Bias Current 0.5 2 1 5 µA Input Offset Current 0.5 0.5 µA Open Loop Gain ∆VO= 1 to 3V 60 66 60 66 dB Output Swing (Max. Output ≤ Ramp Peak - 100mV) Minimum Total Range 0.3 3.5 0.3 3.5 V CMRR VCM = 1.5 to 5.5V 70 80 70 80 dB PSRR VIN = 8 to 30V 70 80 70 80 dB Short Circuit Current VCOMP = 0V -4 -10 -4 -10 mA Gain Bandwidth* TJ = 25°C, AVOL = 0dB 1 2 1 2 MHz Slew Rate* TJ = 25°C, AVCL = 0dB 0.8 0.8 V/ µs PWM Section Continuous Duty Cycle Range* (other than zero) Minimum Total Continuous Range, Ramp Peak < 4.2V 495 4 95 % 50% Duty Cycle Clamp RSENSE to VREF = 10k 42 47 52 42 47 52 % Output Saturation IOUT = 20mA 0.2 0.4 0.2 0.4 V IOUT = 200mA 1.7 2.2 1.7 2.2 V Output Leakage VOUT = 40V 0.1 10 0.1 10 µA Comparator Delay* Pin 8 to Pin 12, TJ = 25°C, RL = 1k Ω 300 500 300 500 ns Sequencing Functions Comparator Thresholds Pins 2, 3, 5 2.8 3.0 3.2 2.8 3.0 3.2 V Input Bias Current Pins 3, 5 = 0V -1.0 -4.0 -1.0 -4.0 µA Input Leakage Pins 3, 5 = 10V 0.1 2.0 0.1 2.0 µA Start/UV Hysteresis Current Pin 2 = 2.5V 170 200 220 170 200 230 µA Ext. Stop Threshold Pin 4 0.8 1.6 2.4 0.8 1.6 2.4 V Error Latch Activate Current Pin 4 = 0V, Pin 3 > 3V -120 -200 -120 -200 µA Driver Bias Saturation Voltage, VIN - VOH IB = -50mA 2 3 2 3 V Driver Bias Leakage VB = 0V -0.1 -10 -0.1 -10 µA Slow-Start Saturation IS = 10mA 0.2 0.5 0.2 0.5 V Slow-Start Leakage VS = 4.5V 0.1 2.0 0.1 2.0 µA Current Control Current Limit Offset 0 5 0 10 mV Current Shutdown Offset 370 400 430 360 400 440 mV Input Bias Current Pin 7 = 0V -2 -5 -2 -5 µA Common Mode Range* -0.4 3.0 -0.4 3.0 V Current Limit Delay* TJ = 25°C, Pin 7 to 12, RL = 1k 200 400 200 400 ns * These parameters are guaranteed by design but not 100% tested in production. UC1841 UC2841 UC3841 ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = -55°C to +125°C for the UC1841, -25°C to +85°C for the UC2841, and 0°C to +70°C for the UC3841; VIN = 20V, RT = 20k Ω, CT = .001mfd, RR = 10kΩ, CR = .001mfd, Current Limit Threshold = 200mV, TA = TJ. 3 |
Ähnliche Teilenummer - UC3841N |
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Ähnliche Beschreibung - UC3841N |
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