UCC3921D Texas Instruments - Yeehing Electronics

Floating negative hot swap controller with commercial temp range

Pricing (USD)

Quantity	Unit Price
1 — 99	3.724
100 — 249	3.036
250 — 999	2.386
1,000 +	1.42

The above prices are for reference only.

Specifications

Manufacturer	Texas Instruments
Product Category	Hot Swap Voltage Controllers
RoHS	Y
Product	Controllers & Switches
Current Limit	Adjustable
Supply Voltage - Max	- 10.5 V
Supply Voltage - Min	- 9999 V
Number of Channels	1 Channel
Operating Supply Current	2 mA
Minimum Operating Temperature	0 C
Maximum Operating Temperature	+ 70 C
Mounting Style	SMD/SMT
Package / Case	SOIC-8
Packaging	Tube
Description/Function	Latchable negative floating single, hot-swap IC commercial temperature
Operating Temperature Range	0 C to + 70 C
Series	UCC3921
Type	Negative Voltage
Brand	Texas Instruments
Input / Supply Voltage - Max	- 10.5 V
Input / Supply Voltage - Min	- 9999 V
Operating Supply Voltage	- 9999 V to - 10.5 V
Product Type	Hot Swap Voltage Controllers
Factory Pack Quantity	75
Subcategory	PMIC - Power Management ICs
Unit Weight	0.002561 oz

For more information, please refer to datasheet

Documents

UCC3921D Datasheet

More Information

The UCC3921 family of negative floating hot swap power managers provides complete power management, hot swap, and fault handling capability. The IC is referenced to the negative input voltage and is powered through an external resistor connected to ground, which is essentially a current drive as opposed to the traditional voltage drive. The onboard 10V shunt regulator protects the IC from excess voltage and serves as a reference for programming the maximum allowable output sourcing current during a fault. All control and housekeeping functions are integrated and externally programmable. These include the fault current level, maximum output sourcing current, maximum fault time, selection of Retry or Latched mode, soft start time, and average power limiting. In the event of a constant fault, the internal timer will limit the on time from less than 0.1% to a maximum of 3% duty cycle. The duty cycle modulation depends on the current into PL, which is a function of the voltage across the FET, thus limiting average power dissipation in the FET. The fault level is fixed at 50mV across the current sense amplifier to minimize total dropout. The fault current level is set with an external current sense resistor, while the maximum allowable sourcing current is programmed with a voltage divider from VDD to generate a fixed voltage on IMAX. The current level, when the output acts as a current source, is equal to VIMAX/RSENSE. If desired, a controlled current start up can be programmed with a capacitor on IMAX.