ICE3A2065PBKSA1

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PMIC - AC DC Converters, Offline Switchers

ICE3A2065PBKSA1 is a Current Mode PWM Controller with Anti-Ring Function especially suited for Off-Line Switching Power Supplies. It is especially suitable for low power off-line PWM AC/DC applications such as adapters, chargers, or power supplies. The IC owns the features of low start-up current, high voltage (up to 700V) and wide range of operating frequency. Its working principle is based on the concept of current mode buck control.

The operating circuit of the ICE3A2065PBKSA1, as shown in the figure below, has a few basic comonnets:

The input of the ICE3A2065PBKSA1 is an AC voltage, typically the main voltage of the power supply. It is rectified and filtered then applied to the input of the IC, which steps down the Vin of input source.The MOSFET is the series pass element, or the switch, of the power supply. It is driven by the WS signal. The current sense signal is from the secondary side of the transformer, and is used to provide Pulse Width Modulation control for the power supply.

The ICE3A2065PBKSA1 provides excellent static performance, featuring low start-up and operating current. The over-voltage protection (OVP) circuit and the brown-in and brown-out functions are the two protection circuits implemented in the ICE3A2065PBKSA1. The OVP circuit ensures enough protection from excessive input and output voltages, while the brown-in and brown-out functions protect the power supply during start-up and established power conditions. The features of Soft Start, Zero Voltage or Peak Current Detection, Brown-in/ Brown-Out Protection and OVP are needed to make the power supply robust and reliable.

The ICE3A2065PBKSA1 has a wide range of application field, such as adapters, chargers, power supplies and many other off-line switching power supplies. It is applicable due to its low start-up voltage and high voltage operation.

In conclusion, the ICE3A2065PBKSA1 is an excellent current-mode PWM controller for low power off-line PWM AC/DC applications such as adapters, chargers, or power supplies. It is featured by low start-up current, high voltage tolerance (up to 700V) and wide range of operating frequency. It implements many protection such as OVP circuit, Brown-in/Brown-out functions and soft start. In addition, the ICE3A2065PBKSA1 can be used in a varied range application field, such as adapters, chargers, and power supplies.

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