Key facts
- Brand
- ON Semiconductor
- Model
- NCP1052
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-07-11
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ON Semiconductor AND8098/D NCP1052 Low-Cost High-Voltage Buck and Buck-Boost Application Note
This document presents application circuits for low-cost, high-voltage (20 Vdc to 700 Vdc) non-isolated power supplies using the NCP1052 switching controller. The NCP1052 is an integrated 700 V/300 mA power switch designed primarily for isolated flyback converters but can be used for buck and buck-boost topologies to eliminate the need for optocouplers and transformers. The circuits support an output current of 100 mA with an output voltage of 5.0 V or above, achieving typical efficiencies around 65%.
Read onlineON Semiconductor NCP1052 specifications
| Input Voltage Range | 20 Vdc to 700 Vdc |
|---|---|
| Output Voltage Range | 5.0 V or above |
| Output Current Capability | 100 mA |
| Integrated Switch Voltage | 700 V |
| Integrated Switch Current | 300 mA |
| Typical Efficiency | 65% |
| Switching Frequency | 44, 100, or 136 kHz |
Source: ON Semiconductor AND8098/D NCP1052 Low-Cost High-Voltage Buck and Buck-Boost Application Note
All ON Semiconductor NCP1052 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the primary design application for the NCP1052?
It is primarily designed for isolated 10 W-range flyback converter applications.
From: ON Semiconductor AND8098/D NCP1052 Low-Cost High-Voltage Buck and Buck-Boost Application Note
Can the NCP1052 be used for non-isolated power supplies?
Yes, it can be used as a stepping-down buck and buck-boost converter to save cost by removing the optocoupler and transformer.
From: ON Semiconductor AND8098/D NCP1052 Low-Cost High-Voltage Buck and Buck-Boost Application Note
What is the output power range for these regulators?
In flyback converter applications, they provide an output power ranging from 6.0 W to 40 W with a fixed AC input of 100 V, 115 V, or 230 V.
From: ON NCP1050 NCP1051 NCP1052 NCP1053 NCP1054 NCP1055 handbook(1)
Do these devices require an auxiliary bias winding?
No, the series features an active startup regulator circuit that eliminates the need for an auxiliary bias winding on the converter transformer.
From: ON NCP1050 NCP1051 NCP1052 NCP1053 NCP1054 NCP1055 handbook(1)
What is the operating input voltage range?
The devices operate from a rectified AC line source ranging from 85 V to 265 V.
From: ON NCP1050 NCP1051 NCP1052 NCP1053 NCP1054 NCP1055 datasheet(1)
Does this device require an auxiliary bias winding?
No, the active startup regulator circuit eliminates the need for a transformer auxiliary bias winding.
From: ON NCP1050 NCP1051 NCP1052 NCP1053 NCP1054 NCP1055 datasheet(1)