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UC1851J883B Arkusz danych(PDF) 2 Page - Texas Instruments |
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UC1851J883B Arkusz danych(HTML) 2 Page - Texas Instruments |
2 / 11 page UC1851 UC2851 UC3851 Supply Voltage, +VIN (Pin 15) Voltage Driven . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +32V Current Driven, 100mA maximum . . . . . . . . . . . Self-limiting PWM Output Voltage (Pin 12) . . . . . . . . . . . . . . . . . . . . . . . 40V PWM Output Current, Steady-State (Pin 12) . . . . . . . . . 400mA PWM Output Peak Energy Discharge . . . . . . . . . . . . 20 µJoules Driver Bias Current (Pin 14) . . . . . . . . . . . . . . . . . . . . . -200mA Reference Output Current (Pin 16) . . . . . . . . . . . . . . . . -50mA Slow-Start Sink Current (Pin 8) . . . . . . . . . . . . . . . . . . . . 20mA VIN Sense Current (Pin 11). . . . . . . . . . . . . . . . . . . . . . . . 10mA Current Limit Inputs (Pins 6 & 7) . . . . . . . . . . . . . -0.5 to +5.5V Stop Input (Pin 4) . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to +5.5V Comparator Inputs (Pins 1–7, 9–11, 16). . . . . . . . . . . . . . Internally clamped at 12V Power Dissipation at TA = 25°C (Note 3). . . . . . . . . . . 1000mW Power Dissipation at TC = 25°C (Note 3). . . . . . . . . . . 2000mW Operating Junction Temperature . . . . . . . . . . . -55°C to +150°C Storage Temperature Range . . . . . . . . . . . . . . -65°C to +150°C Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . +300°C Note 1:All voltages are with respect to ground, Pin 13. Currents are positive-into, negative-out of the specified terminal Note 2:All pin numbers are referenced to DIL-18 package. Note 3:Consult Packaging Section of Databook for thermal limitations and considerations of package. DIL-18, SOIC-18 (TOP VIEW) J or N, DW Package CONNECTION DIAGRAMS PACKAGE PIN FUNCTIONS FUNCTION PIN COMP 1 START/UV 2 OV SENSE 3 STOP 4 RESET 5 CUR THRESH 7 CUR SENSE 8 SLOW START 9 RT/CT 10 RAMP 11 VIN SENSE 12 PWM OUT 13 GROUND 14 DRIVE BIAS 15 +VIN SUPPLY 17 5.0V REF 18 INV. INPUT 19 N.I. INPUT 20 PLCC-20, LCC-20 (TOP VIEW) Q, L PACKAGE ABSOLUTE MAXIMUM RATINGS (Note 1) Unless otherwise stated, these specifications apply for TA = -55°C to +125°C for the UC1851, -40°C to +85°C for the UC2851, and 0°C to 70°C for the UC3851; VIN = 20V, RT = 20k Ω, CT = .001 mfd, RR = 10kΩ, CR = .001mfd. Current Limit Threshold = 200mV, TA = TJ. ELECTRICAL CHARACTERISTICS: PARAMETER TEST CONDITIONS UC1851 / UC2851 UC3851 UNITS MIN TYP MAX MIN TYP MAX Power Inputs Start-Up Current VIN = 30V, Pin 2 = 2.5V 4.5 6 4.5 6 mA Operating Current VIN = 30V, Pin 2 = 3.5V 15 21 15 21 mA Supply OV Clamp VIN = 20mA 333945333945 V Reference Section Reference Voltage TJ = 25°C 4.95 5.0 5.05 4.9 5.0 5.1 V Line Regulation VIN = 8 to 30V 10 15 10 20 mV Load Regulation IL = 0 to 10mA 1020 1030 mV Total Ref Variation Over Operating Temperature Range 4.9 5.1 4.85 5.15 V Short Circuit Current VREF = 0, TJ = 25°C -80 -100 -80 -100 mA Oscillator Nominal Frequency TJ = 25°C 47 50 53 45 50 55 kHz Voltage Stability VIN = 8 to 30V 0.5 1 0.5 1 % Total Ref Variation Over Operating Temperature Range 45 55 43 57 kHz Maximum Frequency RT = 2k Ω, CT = 330pF 500 500 kHz 2 |
Podobny numer części - UC1851J883B |
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