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UC3844D The ON Semiconductor UC3844D is a fixed-frequency, current-mode PWM controller designed for off-line and DC-to-DC converter applications. It operates at frequencies up to 500kHz.
Mfr Part #:

UC3844D

Available from 1 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor UC3844D is a fixed-frequency, current-mode PWM controller designed for off-line and DC-to-DC converter applications. It operates at frequencies up to 500kHz.
✓ Total Stock: 1,045 pcs
$ Price Range: $0.78

UC3844D Available from 1 distributor

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
1,045 pcs
On Request
1045 pcs On Request 1 On Request On Request 17+ 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.

UC3844D Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Duty Cycle (Max)
Frequency
Function
Input Voltage
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Current
Output Phases
Output Type
Storage Temperature
Supplier Device Package
Synchronous Rectifier
Tape & Reel
Topology
Voltage
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UC3844D Description

Short technical summary and product information.

The UC3844D from ON Semiconductor is a high-performance, fixed-frequency current-mode PWM controller. It is engineered for off-line and DC-to-DC converter applications, requiring minimal external components.

 

Key features include an operating frequency up to 500kHz, a maximum duty cycle of 48%, and a wide supply voltage range of 10V to 30V. The controller integrates a temperature-compensated reference, a high-gain error amplifier, a current sensing comparator, and a high-current totem pole output suitable for driving power MOSFETs.

 

Protective features include undervoltage lockout (UVLO) with hysteresis, cycle-by-cycle current limiting, and an output deadtime adjustable from 50% to 70%. The UC3844D is available in a 14-SOIC package, designed for surface mounting.

 

This controller is ideal for applications requiring efficient power conversion, such as switch-mode power supplies.

UC3844D Quick Information

Product Type: DC DC Switching Controller
Canonical Name: UC3844D Current Mode PWM Controller
Subcategory: Current Mode PWM Controller

UC3844D Compliance

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

UC3844D Estimated Pricing

Qty Low High
1+ $0.78 $0.78

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

UC3844D Features

  • Current mode PWM controller for power conversion.
  • Operates at frequencies up to 500kHz.
  • Wide supply voltage range of 10V to 30V.
  • Maximum duty cycle of 48%.
  • Integrated UVLO with hysteresis.

UC3844D Applications

  • Suitable for off-line converters.
  • Ideal for DC-to-DC converters.
  • Used in step-up applications.
  • Used in step-up/step-down applications.
  • Designed for flyback topology.

UC3844D FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range for the UC3844D?

The UC3844D operates from 10V to 30V.

What is the package type for the UC3844D?

The UC3844D is available in a 14-SOIC (0.209", 5.30mm Width) surface mount package.

What is the operating temperature range of the UC3844D?

The UC3844D operates from 0°C to 70°C ambient temperature.

What is the switching frequency of the UC3844D?

The UC3844D has a maximum switching frequency of 500kHz.

What is the maximum duty cycle of the UC3844D?

The maximum duty cycle is 48%.

What is the output current capability of the UC3844D?

The UC3844D can provide ±1A output current.

What topologies does the UC3844D support?

The UC3844D supports boost and flyback topologies.

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