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UC3843AD8TR The Texas Instruments UC3843AD8TR is a current mode PWM controller designed for DC-DC switching regulators. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
Mfr Part #:

UC3843AD8TR

Available from 2 distributors
Mfr Name: Texas Instruments
Texas Instruments
The Texas Instruments UC3843AD8TR is a current mode PWM controller designed for DC-DC switching regulators. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
✓ Total Stock: 14,216 pcs
$ Price Range: $0.31

UC3843AD8TR 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
8,000 pcs
On Request
8000 pcs On Request 1 On Request On Request On Request On Request On Request
Xingangxin ✓
Non-Authorised Inventory information
6,216 pcs
On Request
6216 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.

UC3843AD8TR Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
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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UC3843AD8TR Description

Short technical summary and product information.

The UC3843AD8TR from Texas Instruments is a versatile current mode PWM controller suitable for various DC-DC converter topologies including Boost, Buck, Flyback, and Forward. It is optimized for off-line and DC-DC converters, featuring a low start-up current and an adjustable switching frequency up to 500kHz.

 

This controller operates within a voltage range of 7.6V to 30V and offers a maximum duty cycle of 96%. Key features include pulse-by-pulse current limiting, undervoltage lockout with hysteresis, and a high-current totem pole output. The device is housed in an 8-SOIC package, designed for surface mount applications.

 

Its control features include frequency control, and it is not designed with synchronous rectification or clock synchronization. The operating temperature range is from 0°C to 70°C (TA). This component is ideal for applications requiring efficient power conversion and precise control over switching parameters.

UC3843AD8TR Quick Information

Product Type: DC DC Switching Controller
Series: UC3843A
Canonical Name: UC3843AD8TR Current Mode PWM Controller
Subcategory: DC DC Switching Controllers

UC3843AD8TR Compliance

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

UC3843AD8TR Estimated Pricing

Qty Low High
1+ $0.31 $0.31

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

UC3843AD8TR Features

  • Current mode PWM controller for DC-DC.
  • Supports Boost, Buck, Flyback topologies.
  • Operates from 7.6V to 30V.
  • Up to 500kHz switching frequency.
  • Surface mount 8-SOIC package.

UC3843AD8TR Applications

  • Used in boost converter power supplies.
  • Ideal for buck converter designs.
  • Suitable for flyback and forward converters.
  • Employed in isolated power supply circuits.
  • Suitable for a variety of DC-DC conversion needs.

UC3843AD8TR FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range for the UC3843AD8TR?

The supply voltage range is 7.6V to 30V.

What package does the UC3843AD8TR come in?

It is housed in an 8-SOIC surface mount package (0.154", 3.90mm width).

What is the operating temperature range of the UC3843AD8TR?

It operates from 0°C to 70°C (TA).

What is the maximum switching frequency of the UC3843AD8TR?

The maximum switching frequency is 500 kHz.

What is the maximum duty cycle of the UC3843AD8TR?

The maximum duty cycle is 96%.

What control mode does the UC3843AD8TR use?

It uses current-mode control.

Which topologies does the UC3843AD8TR support?

It supports boost, buck, flyback, and forward topologies.

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