Signo XP3358 has designed a 60W LED driver power supply reference design. This power supply is a single-stage high PF value XP3358 flyback design, and it is the primary side feedback, without optocoupler and output current detection circuit, and completes the constant voltage control at the primary stage. , The circuit is simplified, the design is simplified and the cost is reduced.
Download:
Signo XP3358 Specifications-Zhuo Daxin
sample application:
Technical support: Li Sheng 13691661579
This power supply has a built-in Innosec INN700TK350B gallium nitride switch tube, which is packaged in TO252, with a rated withstand voltage of 700V and a transient withstand voltage of 800V, with more margin. The power supply supports 90-264V input voltage, and the 220V input full-load output efficiency is as high as 93.5%, reflecting the performance advantages of gallium nitride.
Appearance of 60W Gallium Nitride LED Driver Power Solution
Innosec 60W Gallium Nitride LED driver uses a black PCB board, the front device adopts a more classic three-stage layout, and the output rectifier diode has a heat sink to help dissipate heat.
Use a vernier caliper to measure the length of the PCBA module to be about 79mm.
The width is about 41.14mm.
The thickness is about 25.61mm.
The measured weight of the PCBA module is about 84.5g.
Innosec 60W Gallium Nitride LED Driver Solution Analysis
After understanding the size of the solution module, let's take a look at the specific information of the solution device.
The front view of the PCBA module, the upper left corner is the AC input terminal, welding fuse, varistor, common mode inductor, safety X2 capacitor. Weld the transformer on the right side, and weld the rectifier tube, filter capacitor and filter inductor on the right side of the transformer.
Weld two rectifier bridges, main control chip and gallium nitride switch tube on the back.
Solder fuses, varistors and common mode inductors at the input of the PCBA module.
Side view, welding components such as common mode inductors, filter capacitors and filter inductors.
There is a yellow Y capacitor in the middle on the other side.
Weld the filter inductor, filter capacitor and rectifier diode on the output side.
The input fuse is from CONQUER, MST series ultra-small time-delay fuse with a specification of 2A 250V.
The common mode inductor is wound with enameled wire and insulated wire.
Safety X2 capacitors are from CARLI.
The second common mode inductor is wound with flat copper wire.
A 10D471K varistor is used for input surge protection.
After being filtered by the EMI circuit, the AC power is converted into pulsating DC power by two Wald WRMSB40M rectifier bridges. This soft bridge has a softer recovery curve and a smoother turn-off characteristic, which can reduce the capacitance of the diode junction to achieve the effect of very little harmonic oscillation.
Wald WRMSB40M details information.
The red film filter capacitor is from JURCC, with a capacity of 0.33μF.
A close-up of the magnetic ring filter inductor.
The yellow film filter capacitor is from JURCC, with a capacity of 0.33μF.
The primary main control chip is from Signuo Microelectronics, silk screen 57E000, the actual model is XP3358, it is a digital high-performance single-stage high power factor constant voltage controller chip, supporting PFC application in two-stage drive or single-stage constant voltage drive, It adopts SOT23 package and is the primary side feedback.
The built-in high-performance digital core of XP3358 can analyze the auxiliary winding waveform in real time, completely reconstruct the output voltage waveform on the primary side, and realize high-precision primary side control. The chip also supports internal loop compensation, eliminating the need for external compensation components. XP3358 supports multiple protection functions to ensure system security.
Signo Microelectronics XP3358 Details.
F501D depletion MOS tube is used for start-up control.
The MMBT4401 triode is used for power supply and voltage regulation of the main control chip.
The gallium nitride switch tube is from Innosec, model INN700TK350B. It is an enhanced gallium nitride switch tube with a withstand voltage of 700V. The rated withstand voltage of the device is 700V, the transient withstand voltage is 800V, and the conduction resistance is 350mΩ. INN700TK350B supports ultra-high switching frequency, has no reverse recovery charge, has extremely low gate charge and output charge, meets the industrial application requirements of JEDEC standards, has built-in ESD protection, and complies with RoHS, lead-free, and EU REACH regulations.
INN700TK350B is packaged in TO252 and has stronger thermal conductivity. It can be used in switching power supply PFC applications, asymmetric half-bridge/LLC/flyback switching power supply applications, DC-DC conversion, LED lighting, battery fast charging, laptop adapters, computers and Power conversion applications with high energy efficiency and high power density such as electric tool power supplies.
Innosec INN700TK350B data information.
The filter capacitor for powering the primary main control chip comes from ruby, ZLH series long-life electrolytic capacitor, the specification is 35V47μF.
The transformer core is wrapped with tape for insulation.
A close-up of the yellow Y capacitor.
The rectifier tube fixes the heat sink, the model is MUR2060, and the specification is 20A/600V.
The output filter capacitor is from Emerald, the specification is 80V 470μF.
The output filter inductor adopts the magnetic surround system.
This 60W LED driver reference design based on XP3358 is a single-stage high PF value flyback design, primary side feedback, no need for optocoupler, output current detection resistor and constant current control circuit. The constant voltage control is completed in the primary stage, the circuit is simplified, the design is simplified and the conversion efficiency is improved.
This 60W LED driver has a built-in InnoSec INN700TK350B gallium nitride switch tube, which is packaged in TO252, with a rated withstand voltage of 700V and a transient withstand voltage of 800V. It has more margin for mains applications. The power supply uses Signo XP3358 high PF flyback controller, and the output is rectified by a diode and filtered with an electrolytic capacitor.
After the LED power supply is introduced into gallium nitride, the advantages of low switching loss and high conversion efficiency can reduce the heat dissipation requirements of the power supply, reduce the size of the power supply, and also reduce the overall cost of the power supply, saving energy and carbon, and being more environmentally friendly.