The ucd3138 bridgeless PFC chip is a Texas Instruments digital power controller featuring:

1. Highly integrated digital controller for isolated power supply

– Digitally controlled step ballast soft on/off with up to 3 independent feedback loops

– Dedicated PID-based hardware – Low integrated circuit (IC) standby power

– Configurable 2 pole/2 zero soft start/stop with and without pre-bias

– Nonlinear control Fast input voltage feedforward hardware

2. Up to 16MHz Error Analog-to-Digital Converter (EADC) Primary Side Voltage Sensing

– Configurable down to 1mV/LSB resolution Copper trace current sensing

– Automatic resolution selection Flux and phase current balancing for off-peak current mode control applications

– Up to 8x oversampling balance

– Hardware based averaging operation (up to 8x) Current sharing bus support

– 14-bit high-efficiency digital-to-analog converter (DAC) – Analog averaging

– Adaptive Sample Trigger Positioning – Master/Slave

3. Up to 8 high-resolution digital pulse width modulated (DPWM) outputs with rich fault protection options

– 250ps pulse width resolution – 7 high-speed analog comparators

– 4ns frequency resolution – Cycle-by-cycle current limit

– 4ns phase resolution – Programmable fault count

– Adjustable phase shift between outputs – External fault input

– Adjustable deadband between pairs – 10-bit comparator

– Cycle-by-cycle duty cycle matching – Programmable blanking time

– Up to 2MHz switching frequency DPWM waveform synchronization between multiple UCD3138 devices

4. Configurable PWM edge motion 14-channel, 12-bit, 267kbps general-purpose analog-to-digital converter

(ADC), this converter has an integrated – trailing edge modulation

– Programmable averaging filter – Leading edge modulation

– Dual Sample and Hold – Triangle Modulation

5. Internal temperature sensor configurable feedback control

– Voltage Mode Fully programmable high performance 31.25MHz, 32-bit ARM7TDMI-S processor

– Average current mode – 32kbytes (kB) of programmed flash

– Peak Current Mode Control – 2kB Data Flash with Error Correcting Code (ECC)

– Constant Current – ​​4kB Data RAM

– Constant power supply – 4kB boot ROM enabled in the field via I2C or UART

6. Configurable modulation method firmware boot-load

– Frequency Modulation Communication Peripherals

– Phase Shift Modulation – I2C / Power Management Bus (PMBus)

– Pulse Width Modulation – in UCD3138RGC (40-pin quad flat without leads

7. 2 UARTs on Quick, Auto and Smooth Mode Switch (QFN)

– Frequency modulation and PWM – 1 on UCD3138RHA (40-pin QFN)

– Phase shift modulation and PWM UART

8. Efficient and light load management Timer capture with optional input pins

– Burst Mode Up to 5 additional general purpose timers

– Ideal diode emulation Built-in safety devices: BOD and POR

9, 64-pin QFN and 40-pin QFN packages

Operating temperature: -40°C to 125°C

Graphical User Interface (GUI) support for integrated digital power design

The above is the introduction of Texas Instruments‘ bridgeless PFC chip ucd3138. If you want to buy the chip ucd3138, please consult  ShenZhen Hao Qi Core Technology!