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UCC2891PWG4 Datasheet(PDF) 3 Page - Texas Instruments |
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UCC2891PWG4 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 41 page UCC2891, UCC2892 UCC2893, UCC2894 SLUS542F − OCTOBER 2003 − REVISED JULY 2009 3 www.ti.com THERMAL RESISTANCE INFORMATION PACKAGE THERMAL RESISTANCE UNITS SOIC−16 (D) θjc 36.9 to 38.4 °C/W SOIC−16 (D) θja (0 LFM) 73.1 to 111.6 °C/W TSSOP−16 (PW) θjc 33.6 to 35.0 °C/W TSSOP−16 (PW) θja (0 LFM) 108.4 to 147.0 °C/W PIN ASSIGNMENTS RTDEL RTON RTOFF VREF SYNC GND CS RSLOPE LINEOV LINEUV VDD OUT AUX PGND SS/SD FB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 UCC2892 AND UCC2894 D AND PW PACKAGE (TOP VIEW) RTDEL RTON RTOFF VREF SYNC GND CS RSLOPE VIN LINEUV VDD OUT AUX PGND SS/SD FB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 UCC2891 AND UCC2893 D and PW PACKAGEs (TOP VIEW) ELECTRICAL CHARACTERISTICS VDD = 12 V(1), 1-µF capacitor from VDD to GND, 0.01-µF capacitor from VREF to GND, RON = ROFF = 75 kΩ, RDEL = 10 kΩ, RSLOPE = 50 kΩ, −40 °C ≤ TA = TJ ≤ 125°C (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OVERALL ISTARTUP Start-up current VDD < VUVLO 300 500 µA IDD Operating supply current(1)(2) VFB = 0 V, VCS = 0 V, Outputs not switching 2 3 mA HIGH-VOLTAGE BIAS SECTION (UCC2891, UCC2893) IDD−ST VDD startup current Current available from VDD during Start- up, VIN = 36 V, TA = −40°C to 85°C (3) 4 11 mA IVIN JFET leakage current VIN = 120 V; VDD = 14 V 75 µA UNDERVOLTAGE LOCKOUT Start threshold voltage(1) 12.2 12.7 13.2 Minimum operating voltage after start 7.6 8.0 8.4 V Hysteresis 4.4 4.7 5.0 V LINE MONITOR VLINEUV Line UV and Line OV voltage threshold 1.243 1.268 1.293 V ILINEHYS Line UV and Line OV hysteresis current 11.8 12.5 14.5 µA SOFT-START ISS Charge current RTON = 75 kΩ −10.5 −18.5 A ISS Discharge current RTON = 75 kΩ 10.5 18.5 µA VSS/SD Discharge/shutdown threshold voltage 0.4 0.5 0.6 V (1) Set VDD above the start threshold before setting at 12 V. (2) Does not include current of the external oscillator network. (3) The power supply starts with IDD−ST load on VDD, part will start up with no load up to 125°C. For more detailed information, see pin descriptions for VIN and VDD. (4) ISSC and ISS/SD are directly proportional to IRON. See equation 7. |
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