UCC39002

Supply voltage, current limited (V_DD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .−0.3 V to 15 V
Supply voltage, voltage source (V_DD) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  −0.3 V to 13.5 V
Input voltage, current sense amplifier (V_CS+, V_CS−)  . . . . . . . . . . . . . . . . .−0.3 V to V_DD + 0.3 V
Current sense amplifier output voltage (V_CSO)  . . . . . . . . . . . . . . . . . . . . . . .  . . . .−0.3 V to V_DD
Load share bus voltage (V_LS)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .−0.3 V to V_DD
Supply current (IDD + IZENER)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 mA
Adjust pin input voltage (V_ADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .V_EAO +1 V < V_ADJ V_DD
Adjust pin sink current (I_ADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 mA
Operating junction temperature range, T_J . . . . . . . . . . . . . . . . . . . . . . . . . . . .  −55°C to 150°C
Storage temperature range T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . . . .−65°C to 150°C
Lead Temperature, Tsol (Soldering, 10 seconds)  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  300°C
‡ Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.  All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal.

The UCC39002 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 UCC39002 is based on the automatic master/slave architecture of the UC3902 and UC3907 load share controllers. It 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 can be placed in either the GND return path or in the positive output rail of the power supply.