KP201LGA

Integrated constant current function, off-line current mode PWM controller

The KP201LGA is a high-performance PWM controller designed for off-line flyback power supplies.

Integrated with the universal primary constant current control technology, the chip can support intermittent mode and continuous mode, which is suitable for isolated power supply applications with constant current output.

The KP201LGA has an internal high-precision 65kHz switching frequency oscillator with buffing to optimize EMI performance. The chip operates in green energy saving mode and burp mode, and can obtain standby power consumption of less than 75mW.

The KP201LGA integrates complete protection features, including: VDD undervoltage protection (UVLO), VDD overvoltage protection (OVP), cycle by cycle current limitation, short circuit protection (SCP), overload protection (OLP), overheat protection, soft start, VDD clamping and CS pin open protection.

Main feature

• Can support intermittent mode, continuous mode of the original edge constant current technology

• ±5% constant current accuracy; ±1% constant pressure accuracy

• Standby power consumption <75mW

• Fixed 65kHz switching frequency

• Green power saving mode and hiccup mode work

• Ultra-low starting and operating current

• Integrated jitter function to optimize EMI

• Integrated current mode control with internal slope compensation

• Constant current technology with integrated line voltage and inductance compensation

• Integrated protection with self-recovery mode:

• VDD Undervoltage Protection (UVLO)

• VDD Overvoltage Protection (OVP)

• Overheat protection (OTP)

• Cycle by cycle current limit

• Overload Protection (OLP)

• Short Circuit Protection (SCP)

• Front blanking (LEB)

• CS pin open circuit protection

• Package type SOT23-6L

Typical application

• Chargers and adapters

• Motor drive power supply