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UC2902N from TI, Texas Instruments 540pcs , DIP8,Load Share Controller
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UC2902N TI N/a 540
UC2902N from UC, 230pcs , DIP,Load Share Controller
UC2902N from UNITRODE, 2700pcs , DIP,Load Share Controller

UC2902UC3902SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011LOAD SHARE CONTROLLERELECTRICAL CHARACTERISTICS T = –40°C to 105°C, (unless otherwise noted)JPARAMETER TEST CONDITIONS MIN TYP MAX UNITPower SUPPLY SUPPLY CURRENTSHARE+ = 1 V, SENSE = 0 V 4 6II Supply current Supply current mA mACCV = 20 V 6 10CCUNDERVOLTAGE LOCKOUTV Startup voltage SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V 2.3 2.5 2.7 VCCHysteresis SHARE+ = 0.2 V, SENSE = 0 V, COMP = 1 V 60 100 140 mVCURRENT SENSE AMPLIFIERV Input offset voltage 0.1 V ≤ V ≤ 1.1 V−2.5−0.5 1.5 mVIO (SHARE+)SENSE to SHARE gain 0.1 V ≤ V ≤ 1.1 V−41−40−39 V(SHARE+)R Input resistance 0.6 1 1.5 VINSHARE DRIVE AMPLIFIERV = 2.5 V V = −50 mVCC (SENSE)1.2 1.4I = −1 mA(SHARE+)V = 12 V V = −250 mVHigh-level output voltage,CC (SENSE)9.6 10.0 10.4V VOHI = −1 mASHARE+ SHARE+(SHARE+)V = 20 V V = −250 mVCC (SENSE)9.6 10.0 10.4I = −1 mA(SHARE+)V = 2.5 V V = 10 mVCC (SENSE)20 50I = −1 mA(SHARE+)V = 12 V V = 10 mVCC (SENSE)20 50V Low-level output voltage, SHARE+OLI = −1 mA(SHARE+)mV mVV = 20 V V = 10 mVCC (SENSE)20 50I = −1 mA(SHARE+)V = 0 mV, R = 200 Ω(SENSE) (SHARE+)V Output voltage, SHARE+ 20 40O(SHARE+ to GND)0 V ≤ V ≤ 1 V, (SHARE−)CMRR Common mode rejection ratio 50 90 dBSENSE used as input to amplifierLoad on SHARE+, 1 mA ≤ I ≤ −20 mALOADLoad regulation 0 20 mVV = −25 mV(SENSE)I Short circuit current V = 0 V, V = −25 mV−85−50−20 mASC (SHARE+) (SENSE)V = 10 mV to −90 mV step(SENSE)0.12 0.26 0.38R = 200 Ω (SHARE+ to GND)(SHARE+)Slew rate Slew rate V/ V/μs sV = −90 mV to 10 mV step(SENSE)0.12 0.26 0.38R = 200 Ω (SHARE+ to GND)(SHARE+)3UC2902 UC3902SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011DESCRIPTION (continued)A differential line is used for the share bus to maximize noise immunity and accommodate different voltage dropsin each power converter’s ground return line. Trimming of each converter’s output voltage is accomplished byinjecting a small current into the output voltage sense line, which requires a small resistance (typically 20 Ω to100 Ω) to be inserted.These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foamduring storage or handling to prevent electrostatic damage to the MOS gates.ABSOLUTE

UC2902N ,Load Share ControllerUC2902 UC3902SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011DESCRIPTION (continued)A differential ..
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