| Allicdata Part #: | DPA426SN-ND |
| Manufacturer Part#: |
DPA426SN |
| Price: | $ 0.00 |
| Product Category: | Integrated Circuits (ICs) |
| Manufacturer: | Power Integrations |
| Short Description: | IC CONV DC-DC DPA SWITCH SPAK |
| More Detail: | DPA-Switch® Converter, Power Over Ethernet and Tel... |
| DataSheet: |  DPA426SN Datasheet/PDF |
| Quantity: | 1000 |
| Series: | DPA-Switch® |
| Packaging: | Tube |
| Part Status: | Obsolete |
| Applications: | Converter, Power Over Ethernet and Telecom Applications |
| Voltage - Input: | 16 V ~ 75 V |
| Number of Outputs: | 1 |
| Voltage - Output: | 220V |
| Operating Temperature: | -40°C ~ 125°C |
| Mounting Type: | Surface Mount |
| Package / Case: | SPak-7 (6 leads + Tab) |
| Supplier Device Package: | S-PAK |
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DPA426SN Application Field and Working Principle
Introduction to DPA426SN
The DPA426SN is a highly integrated PWM controller for LED backlight application. It combines LED dimming controllers, LED string voltage-regulation enabling and charge pump integrated circuits. This new device takes a buck adjustable and a constant frequency synchronous boost to generate a high efficient, wide voltage range, floating current regulated power supply. The device supports panel brightness control through a voltage input and a PWM input and accurate current regulation in panels with different brightness requirements. The controlled boost converter can reach high conversion efficiency while the current regulation loop acts as a safety system to protect the panel.
Application fields of DPA426SN
The main applications of DPA426SN are LCD TV backlights and display backlight designs with wide range of operating voltages. It also finds excellent use in automotive and light industrial displays where fast, precise and efficient design solutions are needed. The device has low standby power, low output ripple and wide input voltage range. It also features short circuit protection, over temperature protection and low EMI. LED dimming capabilities through diffusing and gradual PWM can be achieved with the DPA426SN. The device also offers excellent color accuracy by having the GMPTE feature.
Working Principle of DPA426SN
The device uses two active power regulation channels, a synchronous buck and a floating current regulated boost, to generate the output voltage required by the panel. It also utilizes a PWM buck dimming channel to achieve maximum dimming. The output voltage of the synchronized buck is adjustable and the output voltage of the current-regulated boost is fixed. The combined waveform of the two channels offers the advantage of a wide output voltage range and extremely high efficiency. The outputs of the two regulators are combined in a resistive divider, which offers excellent current regulation by varying the duty cycle of the boost converter at constant frequency. A simple average current regulation scheme is used to follow the initial brightness set by the dimming input.
Conclusion
The DPA426SN from Intersil is a state-of-the-art device for LCD TV backlight and display backlight designs. It offers excellent design solutions with its wide range of working voltages, low EMI, fast, precise and efficient operation and excellent color accuracy. This product is highly recommended for LCD TV backlights and display backlight designs.
The specific data is subject to PDF, and the above content is for reference
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