R7731AGE vs UCC25701N
| Part Number |
|
|
| 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 SWITCH MULT TOP 14DIP |
| Package | -Reel® | Tube |
| Series | - | - |
| Operating Temperature | -40°C ~ 85°C (TA) | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount | Through Hole |
| Package / Case | SOT-23-6 | 14-DIP (0.300\", 7.62mm) |
| Supplier Device Package | SOT-23-6 | 14-PDIP |
| Topology | Flyback | Boost, Flyback, Forward |
| Voltage - Supply (Vcc/Vdd) | 12V ~ 25V | 9V ~ 15V |
| Frequency - Switching | 65kHz | 700kHz |
| Control Features | - | Soft Start, Sync |
| Power (Watts) | - | - |
| Voltage - Breakdown | - | - |
| Internal Switch(s) | No | No |
| Output Isolation | Isolated | Isolated |
| Voltage - Start Up | 14 V | 13 V |
| Duty Cycle | 75% | 99% |
| Fault Protection | Current Limiting, Over Load, Over Temperature, Over Voltage | Current Limiting |
-
1. 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.
-
2. 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.
-
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.
-
4. How to ensure safety in AC/DC converter design?
AC/DC converters must comply with safety standards (such as UL, IEC), and usually adopt multiple protection measures such as isolation design, over-temperature protection, over-current protection, short-circuit protection, etc. to ensure equipment safety.
