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TL1454ACNSR Folha de dados(PDF) 10 Page - Texas Instruments |
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TL1454ACNSR Folha de dados(HTML) 10 Page - Texas Instruments |
10 / 27 page TL1454A, TL1454AY DUAL-CHANNEL PULSE-WIDTH-MODULATION (PWM) CONTROL CIRCUIT SLVS423 A– MAY 2002 – REVISED SEPTEMBER 2002 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range, VCC = 6 V, fosc = 500 kHz (unless otherwise noted) (continued) supply current PARAMETER TEST CONDITIONS TL1454A UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ICC(stby) Standby supply current RT open, CT = 1.5 V, No load, VO (COMP1, COMP2) = 1.25 V, 3.1 6 mA ICC(average) Average supply current RT = 10 kΩ, 50% duty cycle, CT = 120 pF, Outputs open 3.5 7 mA electrical characteristics, VCC = 6 V, fosc = 500 kHz, TA = 25°C (unless otherwise noted) reference PARAMETER TEST CONDITIONS TL1454AY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Vref Output voltage, REF IO = 1 mA 1.26 V Input regulation VOC = 3.6 V to 20 V, IO = 1 mA 2 mV Output regulation IO = 0.1 mA to 1 mA 1 mV Output voltage change with temperature IO = 1 mA – 1.25 mV Output voltage change with temperature IO = 1 mA –2.5 mV IOS Short-circuit output current Vref = 0 V 30 mA undervoltage lockout (UVLO) PARAMETER TEST CONDITIONS TL1454AY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT + Positive-going threshold voltage 2.9 V VIT – Negative-going threshold voltage 2.7 V Vhys Hysteresis, VIT + – VIT – 200 mV short-circuit protection (SCP) PARAMETER TEST CONDITIONS TL1454AY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VIT Input threshold voltage 1 V Vstby† Standby voltage No pullup 185 mV VI(latched) Latched-mode input voltage No pullup 60 mV VIT(COMP) Comparator threshold voltage COMP1, COMP2 1 V Input source current VO(SCP) = 0 – 15 µA † This symbol is not presently listed within EIA / JEDEC standards for semiconductor symbology. oscillator PARAMETER TEST CONDITIONS TL1454AY UNIT PARAMETER TEST CONDITIONS MIN TYP MAX UNIT fosc Frequency CT = 120 pF, RT = 10 kΩ 500 kHz Standard deviation of frequency 50 kHz Frequency change with voltage VCC = 3.6 V to 20 V 10 kHz Frequency change with temperature TA = TA(min) to 25°C – 2 kHz Frequency change with temperature TA = 25°C to 85°C – 10 kHz Maximum ramp voltage 1.8 V Minimum ramp voltage 1.1 V |
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