UCC39002DR

Product Summary

The UCC39002DR is an advanced, high performance and low cost loadshare controller that provides all necessary functions to parallel multiple independent power supplies or dc-to-dc modules. Targeted for high reliability applications in server, workstation, telecom and other distributed power systems, the controller is suitable for N+1 redundant systems or high current applications where off-the-shelf power supplies need to be paralleled. The BiCMOS UCC39002DR is based on the automatic master/slave architecture of the UC3902 and UC3907 load share controllers. The UCC39002DR provides better than 1% current share error between modules at full load by using a very low offset post-package-trimmed current-sense amplifier and a high-gain negative feedback loop. And with the amplifier’s common mode range of 0-V to the supply rail, the current sense resistor, RSHUNT, can be placed in either the GND return path or in the positive output rail of the power supply.

Parametrics

UCC39002DR absolute maximum ratings: (1)Supply voltage, current limited (VDD): 0.3 V to 15 V; (2)Supply voltage, voltage source (VDD): 0.3 V to 13.5 V; (3)Input voltage, current sense amplifier (VCS+, VCS.): 0.3 V to VDD + 0.3 V; (4)Current sense amplifier output voltage (VCSO): 0.3 V to VDD; (5)Load share bus voltage (VLS): 0.3 V to VDD; (6)Supply current (IDD + IZENER): 10 mA; (7)Adjust pin input voltage (VADJ): VEAO +1 V < VADJ ≤ VDD; (8)Adjust pin sink current (IADJ): 6 mA; (9)Operating junction temperature range, TJ: 55℃ to 150℃; (10)Storage temperature range Tstg: 65℃ to 150℃; (11)Lead Temperature, Tsol (Soldering, 10 seconds): 300℃.

Features

UCC39002DR features: (1)High Accuracy, Better Than 1% CurrentShare Error at Full Load; (2)High-Side or Low-Side (GND Reference) Current-Sense Capability; (3)Ultra-Low Offset Current Sense Amplifier; (4)Single Wire Load Share Bus; (5)Full Scale Adjustability; (6)Intel SSI LoadShare Specification Compliant; (7)Disconnect from Load Share Bus at Stand-By; (8)Load Share Bus Protection Against Shorts to GND or to the Supply Rail; (9)8-Pin MSOP Package Minimizes Space; (10)Lead-Free Assembly.

Diagrams