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NCP1234AD65R2G The ON Semiconductor NCP1234AD65R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 65kHz and is housed in a 7-SOIC package.
Mfr Part #:

NCP1234AD65R2G

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP1234AD65R2G is a fixed-frequency, current-mode controller designed for flyback converters. It operates at 65kHz and is housed in a 7-SOIC package.
✓ Total Stock: 15,977 pcs
$ Price Range: $0.75

NCP1234AD65R2G Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Smaxon Electronics ✓
Non-Authorised Inventory information
15,388 pcs
On Request
15388 pcs On Request 1 On Request On Request 1150+ On Request On Request
Fe Components ✓
Non-Authorised Inventory information
589 pcs
On Request
589 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.

NCP1234AD65R2G Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Duty Cycle
Fault Protection
Frequency
Halogen Free
Internal Switch(s)
Mounting Type
Operating Temperature
Operating Voltage
Output Current
Output Isolation
Supplier Device Package
Supplier Package
Topology
Voltage
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NCP1234AD65R2G Description

Short technical summary and product information.

The NCP1234AD65R2G from ON Semiconductor is a fixed-frequency, current-mode controller specifically designed for flyback converter applications. This device operates at an oscillator frequency of 65 kHz and features frequency foldback for improved efficiency under light load conditions, along with skip mode for very low standby power consumption.

 

Key electrical characteristics include an operating supply voltage range of 9.5V to 28V and a maximum duty cycle of 85%. It offers ±500 mA peak source/sink current drive capability and a 4.0 ms soft-start time. The controller includes timer-based overload protection and can operate within a temperature range of -40°C to 125°C.

 

This component is supplied in a 7-SOIC package, suitable for surface mount applications. It is designed for ease of use, simplifying auxiliary supply design with its Dynamic Self-Supply (DSS) function. The NCP1234AD65R2G is pin-to-pin compatible with previous NCP12xx families, making it a convenient option for upgrades or new designs requiring cost-effective flyback converter solutions.

NCP1234AD65R2G Quick Information

Product Type: Switching Controller
Series: Ncp1234
Canonical Name: NCP1234 Fixed Frequency Current Mode Controller for Flyback Converters
Subcategory: PMIC - Power Management ICs

NCP1234AD65R2G Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected
Lead Free: Pb-Free

NCP1234AD65R2G Estimated Pricing

Qty Low High
1+ $0.75 $0.75

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

NCP1234AD65R2G Features

  • Fixed-frequency current-mode operation.
  • 65 kHz oscillator frequency version.
  • Frequency foldback for light load efficiency.
  • Timer-based overload protection included.
  • Surface mountable 7-SOIC package.

NCP1234AD65R2G Applications

  • Ideal for AC-DC adapters.
  • Suitable for offline battery chargers.
  • Used in consumer electronics power supplies.
  • Applicable for auxiliary power supplies.

NCP1234AD65R2G FAQs

7 frequently asked questions generated from this part’s specifications.
What is the operating supply voltage range of the NCP1234AD65R2G?

The operating supply voltage range is 9.5V to 28V.

What is the operating temperature range?

The operating temperature range is -40°C to +125°C.

What package is the NCP1234AD65R2G available in?

It is available in an SOIC-7 (7-lead SOIC) surface-mount package.

What is the oscillator frequency?

The oscillator frequency is 65 kHz.

What topology does this controller support?

It supports flyback topology with output isolation.

What is the peak source/sink current drive capability?

The peak source/sink drive capability is ±500 mA.

Does the NCP1234AD65R2G have internal switches?

No, it does not have internal switches.

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