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UC2914

Texas Instruments
Part Number UC2914
Manufacturer Texas Instruments
Description Power Manager
Published Apr 17, 2020
Detailed Description UC2914 UC3914 ą PRODUCT PREVIEW SLUS425C − DECEMBER 2003 − REVISED JULY 2004 5ĆV to 35ĆV HOT SWAP POWER MANAGER FEATU...
Datasheet PDF File UC2914 PDF File

UC2914
UC2914

Overview
UC2914 UC3914 ą PRODUCT PREVIEW SLUS425C − DECEMBER 2003 − REVISED JULY 2004 5ĆV to 35ĆV HOT SWAP POWER MANAGER FEATURES D 5-V to 35-V Operation D Precision Maximum Current Control D Precision Fault Threshold D Programmable Average Power Limiting D Programmable Overcurrent Limit D Shutdown Control D Charge Pump for Low RDS(on) High-Side Drive D Latch Reset Function Available D Output Drive VGS Clamping D Fault Output Indication D 18-Pin DIL and SOIC Packages SIMPLIFIED APPLICATION DIAGRAM 6 9 18 OSC PMP REF 1 PMPB 16 IMAX VCC 2 UC2914/UC3914 5 OSCB SENSE 17 7 VPUMP 4 SD VOUT 10 FAULT GND 1 OUT 11 VOUTS 12 PLIM 14 LR CT 13 15 VCC DESCRIPTION The UC3914 family of hot swap power managers provides complete power management, hot swap and fault handling capability.
Integrating this part and a few external components, allows a board to be swapped in or out upon failure or system modification without removing power to the hardware, while maintaining the integrity of the powered system.
Complementary output drivers and diodes have been integrated for use with external capacitors as a charge pump to ensure sufficient gate drive to the external N-channel MOSFET transistor for low RDS(on).
All control and housekeeping functions are integrated and externally programmable and include the fault current level, maximum output sourcing current, maximum fault time and average power limiting of the external FET.
The UC3914 features a duty ratio current limiting technique, which provides peak load capability while limiting the average power dissipation of the external pass transistor during fault conditions.
The fault level is fixed at 50 mV with respect to VCC to minimize total dropout.
The fault current level is set with an external current sense resistor.
The maximum allowable sourcing current is programmed by using a resistor divider from VCC to REF to set the voltage on IMAX.
The maximum current level, when the output appears as a current source is (VVCC − VIMAX)/R...


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