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NCP1343AMDCDBD1R2G The ON Semiconductor NCP1343AMDCDBD1R2G is a quasi-resonant flyback controller designed for high-performance offline power converters. It operates with a wide supply voltage range and features a maximum switching frequency of 500kHz.
Mfr Part #:

NCP1343AMDCDBD1R2G

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1343AMDCDBD1R2G is a quasi-resonant flyback controller designed for high-performance offline power converters. It operates with a wide supply voltage range and features a maximum switching frequency of 500kHz.
✓ Total Stock: 41,341 pcs
$ Price Range: $0.75

NCP1343AMDCDBD1R2G Available from 2 distributors

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40,341 pcs
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NCP1343AMDCDBD1R2G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Control Features
Duty Cycle
Fault Protection
Frequency
Internal Switch(s)
Mounting Type
Operating Temperature
Operating Voltage
Output Isolation
Power (Watts)
SVHC Present
Supplier Device Package
Tape & Reel
Topology
Voltage
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NCP1343AMDCDBD1R2G Description

Short technical summary and product information.

The NCP1343AMDCDBD1R2G from ON Semiconductor is a highly integrated quasi-resonant flyback controller suitable for designing high-performance offline power converters. It operates within a wide VCC range of 9V to 28V and supports a switching frequency from 25kHz up to 500kHz.

 

Key features include valley switching operation with valley-lockout for noise-free operation, frequency foldback with a minimum frequency clamp for increased efficiency at light loads, and skip mode with quiet-skip technology for optimal performance during light loads. The controller also integrates rapid frequency foldback for fast reduction of switching frequency.

 

For converter ruggedness, the NCP1343 implements several protective features such as internal brownout detection, non-dissipative Over Power Protection (OPP), and latched overvoltage and NTC-ready overtemperature protection. It has a maximum duty cycle of 75% and a breakdown voltage of 700V.

 

This component is available in a 9-SOIC package and is designed for surface mount applications. It offers fault protection including current limiting, over load, over temperature, over voltage, and short circuit protection.

NCP1343AMDCDBD1R2G Quick Information

Product Type: AC DC Converters, Offline Switches
Series: NCP1343
Canonical Name: NCP1343 Quasi-Resonant Flyback Controller
Subcategory: Quasi-Resonant

NCP1343AMDCDBD1R2G Compliance

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

NCP1343AMDCDBD1R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1343AMDCDBD1R2G Features

  • Quasi-resonant flyback controller for offline converters.
  • Wide 9V to 28V supply voltage range.
  • Up to 500kHz switching frequency.
  • Valley switching with noise-free operation.
  • Integrated fault protection features.

NCP1343AMDCDBD1R2G Applications

  • High-performance offline power converters.
  • Designs requiring stable valley switching.
  • Applications needing light load efficiency.
  • Power supplies with transient load capability.

NCP1343AMDCDBD1R2G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating voltage range of the NCP1343AMDCDBD1R2G?

The supply voltage range is 9V to 28V. The start-up voltage is 17V and the under-voltage lockout is 9V.

What is the package type for this part?

It comes in a 10-SOP (0.154", 3.90mm Width) surface mount package with 9 leads, also referred to as SOIC.

What is the operating temperature range?

-40°C to 125°C (junction temperature).

What is the switching frequency range?

25kHz to 500kHz, adjustable via frequency control.

What is the maximum duty cycle?

75%.

What fault protections are included?

Current limiting, overload, over temperature, over voltage, and short circuit protection.

Does this controller have an internal switch?

No, it requires an external MOSFET (no internal switch).

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