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UC3843AD The UC3843AD from Texas Instruments is a current mode PWM controller designed for DC-DC switching applications. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
Mfr Part #:

UC3843AD

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The UC3843AD from Texas Instruments is a current mode PWM controller designed for DC-DC switching applications. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
✓ Total Stock: 4,110 pcs
$ Price Range: $0.60

UC3843AD Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
4,000 pcs
On Request
4000 pcs On Request 1 On Request On Request On Request On Request On Request
Braun Electronic Components ✓
Non-Authorised Inventory information
110 pcs
On Request
110 pcs On Request 1 On Request On Request On Request 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.

UC3843AD Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Lead Spacing
Lead Style
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Phases
Output Type
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
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UC3843AD Description

Short technical summary and product information.

The UC3843AD is a current mode PWM controller manufactured by Texas Instruments, suitable for off-line and DC-DC converters. It features a wide operating voltage range from 7.6V to 30V and can operate at frequencies up to 500kHz.

 

Key electrical characteristics include a maximum duty cycle of 96%, frequency control, and pulse-by-pulse current limiting. The device also incorporates undervoltage lockout with hysteresis and double pulse suppression for enhanced reliability.

 

This controller is available in a 14-SOIC surface mount package. Its functionality supports step-up, step-down, and step-up/step-down topologies, including Boost, Buck, Flyback, and Forward configurations. The output type is a transistor driver, with positive and isolation-capable output configuration.

 

The UC3843AD is optimized for power management applications, offering features like low start-up current and automatic feedforward compensation. It is designed for applications requiring efficient and stable power conversion.

UC3843AD Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3843AD Current Mode PWM Controller
Subcategory: Current Mode

UC3843AD Compliance

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

UC3843AD Estimated Pricing

Qty Low High
1+ $0.60 $0.60

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

UC3843AD Features

  • Current mode PWM controller for DC-DC converters.
  • Wide operating voltage from 7.6V to 30V.
  • High operating frequency up to 500kHz.
  • Supports multiple topologies including Boost and Buck.
  • Surface mountable in a 14-SOIC package.

UC3843AD Applications

  • Used in off-line power supplies.
  • Suitable for DC-DC converter designs.
  • Ideal for step-up and step-down applications.
  • Applicable in flyback and forward converters.

UC3843AD FAQs

6 frequently asked questions generated from this part’s specifications.
What is the operating voltage range for the UC3843AD?

The operating voltage range for the UC3843AD is 7.6V to 30V.

What is the maximum operating frequency of the UC3843AD?

The UC3843AD operates at frequencies up to 500kHz.

What is the operating temperature range for the UC3843AD?

The operating temperature range for the UC3843AD is 0°C to 70°C.

What package type is the UC3843AD available in?

The UC3843AD is available in a 14-SOIC package.

Is the UC3843AD RoHS compliant?

The UC3843AD is RoHS3 Compliant.

What is the Moisture Sensitivity Level (MSL) for the UC3843AD?

The Moisture Sensitivity Level (MSL) for the UC3843AD is Level 1 Unlimited.

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