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UCC3830- Datasheet(PDF) 2 Page - Texas Instruments |
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UCC3830- Datasheet(HTML) 2 Page - Texas Instruments |
2 / 10 page 2 UCC3830-4/-5/-6 CONNECTION DIAGRAM SOIC-20 (Top View) DW Package ELECTRICAL CHARACTERISTICS: Unless otherwise specified, VIN = 12V, VSENSE = 3.5V, VD0 = VD1 = VD2 = VD3 = VD4 = 0V, 0°C < TA < 70°C, TA = TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Undervoltage Lockout VIN UVLO Turn-on Threshold 10.5 10.8 V VIN UVLO Turn-off Threshold 9.5 10 V UVLO Threshold Hysteresis 200 500 700 mV Supply Current lIN D0 through D4 = Open 7.5 13.5 mA DAC/Reference COMMAND Voltage Accuracy 10.8V < VIN < 13.2V, IVREF = 0mA, 0°C < TA < 70°C –1 1 % D0-D4 Voltage High DX Pin Floating 4 5 5.2 V D0-D4 Input Bias Current DX Pin Tied to GND –100 –70 –20 µA OVP Comparator Trip Point % Over COMMAND Voltage (Note 1), D0 = D1 = D2 = D4 = Open, D3 = GND 10 17.5 25 % Hysteresis 20 30 mV VSENSE Input Bias Current OV, OVP, UV Combined –0.5 –0.1 0.5 µA The voltage and current amplifiers have a 3MHz gain bandwidth product to satisfy high performance system requirements. The internal current sense amplifier per- mits the use of a low value current sense resistor, mini- mizing power loss. The oscillator frequency is fixed internally at 100kHz, 200kHz, or 400kHz, depending upon the option selected. The foldback circuit reduces the converter short circuit current limit to 50% of its nomi- nal value when the converter is short circuited. The gate driver is a 4 Ω totem pole output stage capable of driving an external MOSFET. This device is available in 20-pin dual in-line and surface mount packages. The UCC3830-x is specified for opera- tion from 0°C to 70°C. Pentium ® Pro and Pentium® Pro II are registered trademarks of Intel Corporation. DESCRIPTION (cont.) FREQUENCY TABLE Frequency 100kHz 200kHz 400kHz UCC3830-4 X UCC3830-5 X UCC3830-6 X UCC3830 – ORDERING INFORMATION Note: Consult factory for temperature range or package op- tions not shown. ABSOLUTE MAXIMUM RATING Input Supply Voltage VIN . . . . . . . . . . . . . . . . . . . . . . . . . . 15V D0, D1, D2, D3, D4, VSENSE, VFB, IS+, IS–, CAM Inputs Maximum Forced Voltage . . . . . . . . . . . . . . . . –0.3V to 5.3V PWRGOOD Output Maximum Voltage. . . . . . . . . . . . . . . . 5.5V COMMAND Ouput Maximum Current . . . . . . Internally Limited Reference Output Current . . . . . . . . . . . . . . . Internally Limited Storage Temperature . . . . . . . . . . . . . . . . . . . –65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C Currents are positive into negative out of the specified terminal. Pulse is defined as a less than 10% duty cycle with a maximum duration of 500 s. Consult Packaging Section of Databook for thermal limitations and considerations of packages. |
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