UCC3895DWG4 vs UC3875DWPTR
| Part Number |
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| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers |
| Manufacturer | Texas Instruments | Texas Instruments |
| Description | IC OFFLINE SW FULL-BRDG 20SOIC | IC OFFLINE SW FULL-BRDG 28SOIC |
| Package | Tape & Reel (TR) | -Reel® |
| Series | - | - |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 20-SOIC (0.295\", 7.50mm Width) | 28-SOIC (0.295\", 7.50mm Width) |
| Supplier Device Package | 20-SOIC | 28-SOIC |
| Function | - | - |
| Topology | Phase-Shifted Full-Bridge | Full-Bridge |
| Output Type | PWM | - |
| Output Configuration | Positive | - |
| Number of Outputs | 1 | - |
| Output Phases | 1 | - |
| Voltage - Supply (Vcc/Vdd) | 10V ~ 16.5V | 9.5V ~ 20V |
| Frequency - Switching | 1MHz | 1MHz |
| Duty Cycle (Max) | 100% | - |
| Synchronous Rectifier | - | - |
| Clock Sync | Yes | - |
| Control Features | Frequency Control, Soft Start, Sync | Frequency Control, Soft Start, Sync |
| Serial Interfaces | - | - |
| Power (Watts) | - | - |
| Voltage - Breakdown | - | - |
| Internal Switch(s) | - | - |
| Output Isolation | - | Non-Isolated |
| Voltage - Start Up | - | 10.75 V |
| Duty Cycle | - | 100% |
| Fault Protection | - | Current Limiting |
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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 does an AC/DC converter work?
An AC/DC converter converts AC to DC through a rectifier circuit, and after filtering and voltage stabilization, it finally provides a stable DC output. Offline switching power supplies also use switching regulation technology to improve efficiency.
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3. What factors should be considered when selecting an AC/DC converter?
Factors such as input voltage range, output voltage and current requirements, power efficiency, packaging, temperature range, reliability and safety certification need to be considered when selecting.
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4. 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.
