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UC2909MDWREP 数据表(PDF) 4 Page - Texas Instruments |
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UC2909MDWREP 数据表(HTML) 4 Page - Texas Instruments |
4 / 21 page UC2909-EP SLUSA72 – JULY 2010 www.ti.com ELECTRICAL CHARACTERISTICS (continued) TA = –55°C to 125°C; CT = 430 pF, RSET = 11.5 KΩ, R10 = 10 KΩ, RTHM = 10 KΩ, VCC = 15 V, Output no load, RSTAT0 = RSTAT1 = 10 KΩ, CHGENB = OVCTAP = VLOGIC, TA = TJ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT PULSE WIDTH MODULATOR Maximum duty cycle CAO = 0.6 V 90 95 100 % Modulator gain CAO = 2.5 V, 3.2 V 63 71 80 %/V OSC peak 3 V OSC valley 1 V OSCILLATOR Frequency 8.8 V < VCC < 35 V 151.65 168.50 185.35 KHz THERMISTOR DERIVED (VID = VRTHM - VR10) Initial accuracy, VID = 0 V, R10 = RTHM = 10 KΩ (3) 2.250 2.300 2.350 V VAO (RTHM = 10 KΩ) Line regulation VCC = 8.8 V to 35 V 3 10 mV RTHM = 138 KΩ, R10 = 10 KΩ 2.435 2.495 2.545 VAO RTHM = 33.63 KΩ, R10 = 10 KΩ 2.340 2.398 2.446 V RTHM = 1.014 KΩ, R10 = 10 KΩ 2.015 2.066 2.107 CHARGE ENABLE COMPARATOR (CEC) Threshold voltage As a function of VA- 0.99 1 1.01 V/V Input bias current CHGENB = 2.3 V -0.5 -0.1 µA VOLTAGE SENSE COMPARATOR (VSC) STAT0 = 0, STAT1 = 0, Function of VREF 0.944 0.95 0.955 Threshold voltage V/V STAT0 = 1, STAT1 = 0, Function of VREF 0.895 0.9 0.905 OVER CHARGE TAPER CURRENT COMPARATOR (OCTIC) Threshold voltage Function of 2.3 V REF, CA- = CAO 0.99 1 1.01 V/V Input bias current OVCTAP = 2.3 V -0.5 -0.1 µA LOGIC 5 V (VLOGIC) VLOGIC VCC = 15 V 4.875 5 5.125 V Line regulation 8.8 V < VCC < 35 V 3 15 mV Load regulation 0 A < IO < 10 mA 3 15 mV Reference comparator turn-on 4.3 4.85 V threshold Short circuit current VREF = 0 V 30 50 80 mA OUTPUT STAGE ISINK 50 mA continuous IPEAK 100 mA VOL IO = 50 mA 1 1.4 V Leakage current VOUT = 35 V 25 µA (3) Thermistor initial accuracy is measured and trimmed with respect to VAO; VAO = VA-. 4 Submit Documentation Feedback Copyright © 2010, Texas Instruments Incorporated Product Folder Link(s): UC2909-EP |
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