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UC3843ADX The On Semiconductor UC3843ADX is a current-mode PWM controller designed for DC to DC converters. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
Mfr Part #:

UC3843ADX

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The On Semiconductor UC3843ADX is a current-mode PWM controller designed for DC to DC converters. It operates within a voltage range of 7.6V to 30V and supports frequencies up to 500kHz.
✓ Total Stock: 5,400 pcs
$ Price Range: $0.78

UC3843ADX Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Braun Electronic Components ✓
Non-Authorised Inventory information
2,900 pcs
On Request
2900 pcs On Request 1 On Request On Request On Request On Request On Request
Components Technology Group, Inc. ✓
Non-Authorised Inventory information
2,500 pcs
On Request
2500 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.

UC3843ADX 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
Operating Voltage
Output Configuration
Output Current
Output Phases
Output Type
Supplier Device Package
Synchronous Rectifier
Topology
Voltage
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UC3843ADX Description

Short technical summary and product information.

The UC3843ADX from On Semiconductor is a fixed PWM controller suitable for offline and DC to DC converter applications. It features a low start current of 0.2mA typical and a short shutdown delay time of 100ns typical. The device operates within a supply voltage range of 7.6V to 30V and supports frequencies up to 500kHz.

 

Key internal circuits include UVLO, a temperature-compensated reference, a high-gain error amplifier, a current sensing comparator, and a high-current totem-pole output for driving a power MOSFET. The UC3843ADX is available in a Surface Mount 8-SOIC package and operates within an ambient temperature range of 0°C to 70°C.

 

This controller is designed for applications requiring efficient power conversion, such as step-up, step-up/step-down, boost, and flyback topologies. Its current-mode control provides inherent cycle-by-cycle current limiting.

UC3843ADX Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3843ADX Current Mode PWM Controller
Subcategory: DC DC Switching Controllers

UC3843ADX Compliance

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

UC3843ADX Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3843ADX Features

  • Current-mode PWM controller for DC-DC converters.
  • Wide operating voltage from 7.6V to 30V.
  • High operating frequency up to 500kHz.
  • Low start current and short shutdown delay.
  • Surface Mount 8-SOIC package.

UC3843ADX Applications

  • Suitable for DC to DC converter applications.
  • Used in step-up and step-down designs.
  • Ideal for boost and flyback topologies.
  • Enables efficient power management circuits.

UC3843ADX FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range of the UC3843ADX?

The supply voltage range is 7.6V to 30V.

What is the maximum switching frequency of the UC3843ADX?

The maximum switching frequency is 500kHz.

What is the operating temperature range of the UC3843ADX?

The operating temperature range is 0°C to 70°C.

What package is the UC3843ADX available in?

The UC3843ADX is available in an 8-SOIC surface mount package.

What topologies does the UC3843ADX support?

The UC3843ADX supports boost and flyback topologies.

What is the maximum duty cycle of the UC3843ADX?

The maximum duty cycle is 96%.

What is the output current capability of the UC3843ADX?

The output current is ±1A.

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