Intelligent Peak Power Multi-Mode Flyback Controller



Printer / Motor Driver Power
Audible Speaker Power
Notebook Adapter


HY1601C/D is an intelligent digital multi-mode Flyback controller. It can be chosen to support the power delivery that fully integrates the power path up to 100W of power with alternate modes. The peak power architecture supports a transient peak power delivery.

HY1601C/D integrates rich protections and features such as line compensation, slope compensation, transformer short protection, output over-voltage protection, over-temperature protection, brown in and brown-out, sense resistor short protection.

HY1601C/D series has 2 options:

HY1601C: 65/130kHz, VCC OVP Latch, Output OVP latch, CV/Peak Power

HY1601D: 89/150kHz, VCC OVP Auto Restart, Output OVP Auto Restart, CV/Peak Power

HY1601C/D is available with the SOT23-6 package.


· Intelligent Digital Peak Power Multi-Mode Control

· Peak Current Mode Control at Burst-Mode /PFM/DCM/CCM

· Continuous-Conduction Mode (CCM) at Low Line(LL), QR at High Line(HL) to Balance the Switching Loss and the Conduction Loss

· Switching Frequency (LL) double at Peak Power Mode

· Adaptive Peak Load Current Period

· Switching Frequency Dithering to Improve EMI   

· Adaptive MOSFET Gate Drive to Balance Switching Loss and EMI

· MOSFET Gate Voltage is Clamped at 12V

· Rich Protection Features  

§   Output OVP


§   Transformer Saturation Protection

§   Current Sensor Resistor Short Protection

§   Output Over Load Protection

§   On chip OTP

· Line Feed-forward Compensation

· Brown-in and Brown-out

· Power Consumption < 75mW

· Low Start-Up Current (<3µA)

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