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Product Detailed Parameters
- Description：IC OFFLINE SWITCH FLYBACK SOT26
- Series：-
- Mfr：Diodes Incorporated
- Package：Tape & Reel (TR)
- Output Isolation：Isolated
- Internal Switch(s)：No
- Voltage - Breakdown：-
- Topology：Flyback
- Voltage - Start Up：15.8 V
- Voltage - Supply (Vcc/Vdd)：10V ~ 25V
- Duty Cycle：75%
- Frequency - Switching：65kHz
- Fault Protection：Current Limiting, Over Load, Over Temperature, Over Voltage
- Control Features：-
- Operating Temperature：-40°C ~ 150°C (TJ)
- Package / Case：SOT-23-6
- Supplier Device Package：SOT-26
- Mounting Type：Surface Mount
- Grade：-
- Qualification：-
- Power (Watts)：-
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Overview
The AP3125RKTR-G1 is a current mode PWM controller for AC/DC flyback converters, manufactured by Diodes Incorporated. It operates within a supply voltage range of 10 V to 25 V and features a fixed switching frequency of 65 kHz. The device supports a maximum duty cycle of 80% and includes integrated protection mechanisms such as overcurrent, overload, overtemperature, and overvoltage protection. It is housed in an SOT-26-6 surface-mount package and is designed for high-efficiency offline power applications.
Feature Summary
- Implements Green Mode technology to enhance efficiency at light loads through variable frequency operation.
- Provides comprehensive fault protection including cycle-by-cycle current limiting, output overload, thermal shutdown, and input overvoltage detection.
- Utilizes current mode control architecture for improved line regulation and transient response in flyback topologies.
Applications
- Offline AC/DC power supplies
- Adapters and chargers
- Standby power supplies
Procurement Notes
Verify the specific suffix 'RK' against the official Diodes Incorporated datasheet to confirm the exact switching frequency variant, as other suffixes like 'HA' or 'HB' denote different frequencies. Confirm RoHS compliance status and moisture sensitivity level requirements prior to ordering. Ensure the SOT-26-6 package dimensions match the target PCB footprint design specifications.
Selection Notes
Select this component for flyback converter designs requiring a 65 kHz switching frequency. Compare against AP3125 variants with different frequency options if EMI constraints differ. Ensure the external transformer design aligns with the 80% maximum duty cycle limit. Verify that the required output current does not exceed the controller's internal driver capabilities without additional external components.
Part Context
This part belongs to the AP3125 series of robust Green-Mode PWM controllers from Diodes Incorporated. The series offers various frequency options tailored for different power levels and EMI requirements. The AP3125RKTR-G1 specifically targets cost-sensitive applications needing reliable performance in standard offline conversion scenarios.
Replacement Considerations
Check for AP3125 variants with identical pinouts but different frequency suffixes if system timing allows. Verify functional compatibility with existing feedback loop compensation networks when substituting.
