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UC3902N The UC3902N from Texas Instruments is an 8-pin load share controller designed to balance current from independent, paralleled power supplies. It operates from 2.7V to 20V.
Mfr Part #:

UC3902N

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The UC3902N from Texas Instruments is an 8-pin load share controller designed to balance current from independent, paralleled power supplies. It operates from 2.7V to 20V.
✓ Total Stock: 112 pcs
$ Price Range: $3.94

UC3902N Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
102 pcs
On Request
102 pcs On Request 1 On Request On Request 13+10+ On Request On Request
Optech Co.,Limited ✓
Non-Authorised Inventory information
10 pcs
On Request
10 pcs On Request 1 On Request On Request 13+10+ On Request On Request
DistyParts aggregates offers from multiple distributors. Final prices, lead times and terms are subject to the distributors' discretion and may change without prior notice. DistyParts is not liable for any discrepancies.

UC3902N Specifications Quick View

Most important parameters for selection – full specs in datasheet.
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UC3902N Description

Short technical summary and product information.

The UC3902N is an 8-pin load share controller manufactured by Texas Instruments. This device is designed to balance the current drawn from independent, paralleled power supplies, ensuring each supply supports its share of the load current.

 

The controller operates within a voltage range of 2.7V to 20V and consumes approximately 4mA of current. Key features include load sharing capabilities, programmable loop compensation, remote sense functionality, and undervoltage lockout (UVLO) protection. The UC3902N is compatible with existing power supply designs and requires a minimum number of external components.

 

It is available in an 8-PDIP through-hole package. The device utilizes a differential share bus for communication and a precision current sense amplifier with a gain of 40. The master power supply, which regulates to the highest voltage, drives the share bus, and the UC3902N adjusts the output voltage of other supplies accordingly.

 

This load share controller is particularly useful in applications requiring paralleled power supplies, allowing for efficient current distribution and improved system reliability.

UC3902N Quick Information

Product Type: Load Share Controller
Canonical Name: UC3902N Load Share Controller
Subcategory: Power Management - Specialized

UC3902N Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

UC3902N Estimated Pricing

Qty Low High
1+ $3.94 $3.94

Estimated market price range - modelled values for guidance only, not live distributor offers.

UC3902N Features

  • Balances current in paralleled power supplies.
  • Operates from 2.7V to 20V.
  • Features programmable loop compensation.
  • Includes remote sense and UVLO protection.
  • Available in 8-PDIP through-hole package.

UC3902N Applications

  • Used in paralleled power supply systems
  • Balances current in redundant power supplies
  • Supports load sharing for N+1 redundancy
  • Enables scalable power supply architectures
  • Compatible with existing remote sense designs

UC3902N FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the UC3902N?

2.7V to 20V.

What is the operating temperature range?

-40°C to 100°C.

What package is the UC3902N available in?

8-DIP (0.300", 7.62mm) / 8-PDIP, through-hole mounting.

What is the supply current of the UC3902N?

4mA.

What topologies does the UC3902N support?

Buck and flyback.

What features does the UC3902N include?

Load sharing, programmable loop compensation, remote sense, UVLO, and under voltage protection.

What is the current sense amplifier gain?

40 gain.

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