AP3125B1KTR-G1

Voltage - Supply (Vcc/Vdd):	10 V ~ 25 V
Mounting Type:	Surface Mount
Supplier Device Package:	SOT-26
Package / Case:	SOT-23-6
Operating Temperature:	-40°C ~ 150°C (TJ)
Control Features:	--
Fault Protection:	Current Limiting, Over Load, Over Temperature, Over Voltage
Frequency - Switching:	65kHz
Duty Cycle:	75%
Series:	--
Voltage - Start Up:	15.8V
Topology:	Flyback
Voltage - Breakdown:	--
Internal Switch(s):	No
Output Isolation:	Isolated
Part Status:	Active
Packaging:	Tape & Reel (TR)

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PMIC - AC DC Converters, Offline Switchers

The AP3125B1KTR-G1, a PMIC (power management integrated circuit), is an integrated power converter, which has distinct AC / DC converters and offline switcher functions. It can convert both alternating and direct current and is mainly used in industrial product and telecommunications applications.

AC / DC Conversion

The AC/DC conversion capability of the AP3125B1KTR-G1 is provided by a power path controlled synchronous rectifier (SR) system, which is optimized to provide high efficiency operation in the full load range of the power conversion cycle. This is done by synchronizing the operation of the SR with the input AC waveform, allowing the converter to directly convert AC to DC without the use of any transformer components, resulting in reduced EMI noise, device size and cost.

Offline Switcher

The AP3125B1KTR-G1 also features an offline Switcher capability, which can be used to provide a steady output voltage regardless of the input voltage fluctuations. The output voltage range of this Switcher can be adjusted between 0.6 V~12V, taking Vin = 15V as the starting point, using the condition that Vin-min ≥ 0.65 VIN. This Switcher also offers a wide range of current limits and protection features, such as short circuit protection, over voltage protection, and over temperature protection.

Working Principle

The working principle of the AP3125B1KTR-G1 is as follows. Firstly, it uses a high frequency transformer to convert the input AC voltage into an isolated DC voltage. This voltage is then converted into a regulated output voltage via an SR system. The SR system works by turning on the SR when the input voltage reaches its peak, and then turning off the SR when the input voltage reaches its minimum. This helps to maintain the output voltage level.The output voltage is also regulated by using an Error Amplifier, which compares the current output voltage with a reference voltage and then adjusts the duty cycle of the SR to either increase or decrease the output voltage. In this way, the voltage level can be monitored and adjusted in real-time, thus providing a stable output voltage.

Conclusion

The AP3125B1KTR-G1 is an ideal choice for industrial applications requiring AC/DC conversion and an offline switcher. Its efficient operation, wide range of protection features, and small size make it an ideal choice for applications such as power supplies, motor controllers, and audio power amplification. With its AC/DC conversion and offline switching capabilities, the AP3125B1KTR-G1 is a versatile and efficient solution for your power needs.

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