UCC3895DWG4 vs LT1738IG#TRPBF
| Part Number |
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| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers |
| Manufacturer | Texas Instruments | Analog Devices Inc. |
| Description | IC OFFLINE SW FULL-BRDG 20SOIC | IC OFFLINE SW MULT TOP 20SSOP |
| Package | Tape & Reel (TR) | Tube |
| Series | - | - |
| Operating Temperature | 0°C ~ 70°C (TA) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 20-SOIC (0.295\", 7.50mm Width) | 20-SSOP (0.209\", 5.30mm Width) |
| Supplier Device Package | 20-SOIC | 20-SSOP |
| Function | - | - |
| Topology | Phase-Shifted Full-Bridge | Boost, Cuk, Flyback |
| Output Type | PWM | - |
| Output Configuration | Positive | - |
| Number of Outputs | 1 | - |
| Output Phases | 1 | - |
| Voltage - Supply (Vcc/Vdd) | 10V ~ 16.5V | 2.55V ~ 20V |
| Frequency - Switching | 1MHz | 20kHz ~ 250kHz |
| Duty Cycle (Max) | 100% | - |
| Synchronous Rectifier | - | - |
| Clock Sync | Yes | - |
| Control Features | Frequency Control, Soft Start, Sync | EN, Frequency Control, Soft Start, Sync |
| Serial Interfaces | - | - |
| Power (Watts) | - | - |
| Voltage - Breakdown | - | - |
| Internal Switch(s) | - | No |
| Output Isolation | - | Isolated |
| Voltage - Start Up | - | - |
| Duty Cycle | - | 93.5% |
| Fault Protection | - | - |
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1. What is an AC/DC converter in a PMIC and what does it do?
An AC/DC converter is a power management IC that converts alternating current (AC) to direct current (DC). It is commonly used in home appliances, industrial equipment, and consumer electronics to provide a stable DC power supply for the circuit.
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2. How important is power factor correction (PFC) for AC/DC converters?
Power factor correction (PFC) is very important for meeting energy regulations and improving power efficiency, especially in high-power applications. PFC circuits can reduce the harmonic interference of equipment to the power grid.
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3. How to improve the efficiency of AC/DC converters?
Choose a more efficient switching topology (such as resonant or quasi-resonant topology), use more efficient semiconductor devices (such as GaN or SiC transistors), and optimize circuit design to reduce switching losses and heat losses.
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4. Are offline switching power supplies suitable for high power applications?
Offline switching power supplies can be used for high power applications, but proper heat dissipation and power management solutions must be designed to ensure conversion efficiency and stability. Choosing a suitable topology such as LLC resonant converter can also help achieve high power output.
