Overview
The UCC29002DR, produced by Texas Instruments, is an advanced 8-pin load-share controller designed for high-reliability applications in server, workstation, telecom, and other distributed power systems. This device is part of the UCC29002 family, which provides all necessary functions to parallel multiple independent power supplies or DC-to-DC modules. It is based on the automatic leader/follower architecture of predecessor UC3902 and UC3907 load-share controllers, ensuring better than 1% current-share error between modules at full load.
The UCC29002DR is suitable for N+1 redundant systems or high-current applications where off-the-shelf power supplies must be paralleled. It operates over a temperature range of -40°C to 105°C, making it versatile for various environmental conditions.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Supply Current (Idle State) | 2.5 | 3.5 | mA | |
| VDD Clamp Voltage | 13.5 | 14.25 | 15 | V |
| Start-up Voltage Threshold (VDD rising) | 4.175 | 4.375 | 4.575 | V |
| Input Offset Voltage (VIO_CS) | -100 | 100 | µV | |
| Operating Temperature Range | -40 | 105 | °C | |
| Maximum Output Voltage | 1.005 | V | ||
| Package Type | SOIC (8), VSSOP (8), PDIP (8) |
Key Features
- High accuracy: Capable of better than 1% current-share error at full load
- High-side or low-side (GND-referenced) current-sense capability
- Ultra-low offset current-sense amplifier
- Single-wire load-share bus
- Full scale adjustability
- Intel® SSI load-share specification compliant
- Disconnect from load-share bus at stand-by
- Load-share bus protection against shorts to GND or to the supply rail
- 8-pin VSSOP package minimizes space
- Lead-free assembly
Applications
- Modules with remote-sense capability
- In conjunction with the internal feedback E/A of OEM power supply units
- N+1 redundant systems
- High-current applications where off-the-shelf power supplies must be paralleled
- Server, workstation, and telecom systems
Q & A
- What is the operating temperature range of the UCC29002DR?
The UCC29002DR operates over a temperature range of -40°C to 105°C
- What is the current-share error of the UCC29002DR at full load?
The device is capable of better than 1% current-share error between modules at full load
- Can the current-sense resistor be placed in either the GND return path or the positive output rail?
- What is the start-up voltage threshold for the UCC29002DR?
The start-up voltage threshold is between 4.175V and 4.575V (VDD rising)
- Is the UCC29002DR compliant with Intel® SSI load-share specifications?
- What types of packages are available for the UCC29002DR?
The UCC29002DR is available in SOIC (8), VSSOP (8), and PDIP (8) packages
- Does the UCC29002DR have load-share bus protection?
- Can the UCC29002DR be used in high-current applications?
- Is the UCC29002DR lead-free?
- What is the maximum VDD for the UCC29002DR?
The maximum VDD for the UCC29002DR is 15V
