R7731AGE vs UCC28722DBVR
| Part Number |
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| Category | PMIC - AC DC Converters, Offline Switchers | PMIC - AC DC Converters, Offline Switchers |
| Manufacturer | Richtek USA Inc. | Texas Instruments |
| Description | IC OFFLINE SW FLYBACK SOT23-6 | IC OFFLINE SW FLYBACK SOT23-6 |
| Package | -Reel® | Tube |
| Series | - | - |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 125°C (TJ) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SOT-23-6 | SOT-23-6 |
| Supplier Device Package | SOT-23-6 | SOT-23-6 |
| Topology | Flyback | Flyback |
| Voltage - Supply (Vcc/Vdd) | 12V ~ 25V | 9V ~ 35V |
| Frequency - Switching | 65kHz | 650Hz ~ 80kHz |
| Control Features | - | - |
| Power (Watts) | - | - |
| Voltage - Breakdown | - | - |
| Internal Switch(s) | No | No |
| Output Isolation | Isolated | Isolated |
| Voltage - Start Up | 14 V | 21 V |
| Duty Cycle | 75% | - |
| Fault Protection | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting, Over Voltage |
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1. What are some common applications of PMIC AC/DC converters?
PMIC AC/DC converters are widely used in scenarios that require AC power to DC, such as chargers, adapters, LED driver power supplies, industrial control equipment, smart home devices, and battery management systems.
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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.
