UCC25701PWG4 vs STR-X6757
| Part Number |
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| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers |
| Manufacturer | Texas Instruments | Sanken |
| Description | IC OFFLINE SW MULT TOP 14TSSOP | IC OFFLINE SWITCH FLYBACK TO3P |
| Package | Tube | Bulk |
| Series | - | STR-X6700 |
| Operating Temperature | -55°C ~ 150°C (TJ) | -20°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | 14-TSSOP (0.173\", 4.40mm Width) | TO-3P-7 Full Pack, Formed Leads |
| Supplier Device Package | 14-TSSOP | TO-3P |
| Topology | Boost, Flyback, Forward | Flyback |
| Voltage - Supply (Vcc/Vdd) | 9V ~ 15V | 9.7V ~ 35V |
| Frequency - Switching | 700kHz | 19kHz ~ 25kHz |
| Control Features | Soft Start, Sync | Soft Start |
| Power (Watts) | - | 320 W |
| Voltage - Breakdown | - | 650V |
| Internal Switch(s) | No | Yes |
| Output Isolation | Isolated | Isolated |
| Voltage - Start Up | 13 V | 18.2 V |
| Duty Cycle | 99% | - |
| Fault Protection | Current Limiting | Current Limiting, Over Load, Over Voltage |
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1. What is an offline switching power supply and how is it different from other AC/DC converters?
An offline switching power supply (Offline Switcher) is an AC/DC converter that can directly obtain power from the mains without an external transformer. It is suitable for inputs with a wide voltage range and usually has efficient switching regulation.
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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. 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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4. 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.
