Single-Phase CrM PFC Controller Series Officially Launched!

12 4, 2024

The latest single-phase critical mode (CrM) PFC controller series, HP101X, introduced by Hynetek, is a boost controller designed for constant voltage conversion mode with power factor correction (PFC) functionality. It employs constant on-time control to achieve high PF and low THD without the need for a multiplier. The Boost converter is driven in a quasi-resonant mode to attain high efficiency and superior EMI performance. With special design considerations, it ensures rapid start-up and reliable protection, meeting safety requirements. Suitable for applications under 300W, such as adapter power supplies, LED lighting power supplies, desktop computers/digital TVs/gaming consoles, and offline power supply PFC front-ends.

1. The HP101X series is specifically designed to drive cost-effective AC/DC converters, complying with stringent input current harmonic limitation standards. The controller utilizes an advanced constant on-time (COT) control strategy, achieving near-ideal power factor without the need for additional line voltage sensing circuits.

2. To further enhance efficiency and optimize electromagnetic interference (EMI) performance, the HP101X series is uniquely designed to turn on at the voltage valley of the Boost PFC main switch, a quasi-resonant mode that effectively reduces switching losses and EMI radiation. Additionally, it incorporates a total harmonic distortion (THD) compensation feature, allowing users to adjust according to different application requirements for lower THD values.

3. The HP101X series boasts a remarkably low start-up current (typically 1.7 µA) and reduces switching frequency under light loads to further decrease standby power consumption. It integrates an internal gate driver with a pull current of 80mA and a sink current of 400mA.

4. The typical application circuit for the HP101X series is a CrM PFC controller using COT mode, eliminating the need for line voltage sampling and enabling ZCD with a single winding, simplifying the application circuit.

As illustrated in Figure 1, the HP101X series demonstrates efficiency at different input voltages of 115Vac and 230Vac, with efficiency reaching up to 98% at a high voltage input of 230Vac.

Figure 1: Efficiency curves of HP101X series products at various loads

Figure 2 shows that the PF value of HP101X series products can be maintained above 0.9 at different input voltages of 115Vac and 230Vac with loads in the range of 50% to 100%.

Figure 2: PF of HP101X series products at each load

Figure 3 demonstrates that the THD value of HP101X series products can almost always be maintained below 30% under different input voltages of 115Vac and 230Vac, and load conditions above 70W.

Figure 3: THD performance of HP101X series products at various loads

Figure 4: HP1016 SOT23-6 package diagram

FEATURES

CrM Boost PFC
COT control scheme for near-unity power factor with wireless voltage detection
Bom to Bom replacement for XX5072B
Reduced switching losses due to valley conduction without auxiliary windings
Dynamic loop switching for faster response
Adaptive DCM frequency reduction mode
Light No-Load Burst Mode Reduces Standby Power Consumption
Inverse current compensation to optimize THD
Configurable soft start time
Comprehensive fault protection

- VCC overvoltage protection, undervoltage protection and output overvoltage protection

- Cycle-by-cycle current limiting

- Built-in over-temperature protection

SOT23-6 package

Figure 5: Typical Application Circuit Diagram for HP1016

Figure 6: 200W evaluation board based on HP1016

Figure 7: HP1017 SOT23-6 package diagram

FEATURES

CrM Boost PFC
COT control scheme for near-unity power factor with wireless voltage detection
Pin to Pin replacement for XXX1622BCC
No auxiliary winding/auxiliary winding for valley conduction to reduce switching losses
Dynamic loop switching for faster response
Adaptive DCM frequency reduction mode
Light No-Load Burst Mode to Reduce Standby Power Consumption
Inverse current compensation to optimize THD
Configurable soft start time
Comprehensive fault protection