特性 Features

? Digital controller assisted high performance analog front ends and fully programmable ARM? Cortex?-M0

processor

- 100 MHz clock, 32-bit

- 64 kB OTP

- 32 kB RAM

- 80 kB ROM

- Firmware based system configuration management and command execution

? Programmable to support one or two fully digital controlled voltage rails

? High performance, low latency digital hardware control loop

? Secondary side regulation with primary-side current signal emulation and primary voltage sensing via

transformer winding

? High-speed voltage sense

- 100 MHz 11-bit ADC with 1.25 mV/ LSB

- Up to 2.1 V differential voltage range

- Auto calibrated offset

- Setpoint accuracy within +/-1% over temperature range at 1.2 V to 2.1 V

- 200 MHz edge detection comparator

- Low latency protection comparators for OVP and UVP

- Up to 3 differential sense channels for output voltage and transformer rectifier voltage sensing

? High-speed current sense

- 25 MHz 9-bit ADC with selectable gain from 100 μV/LSB and 1.45 mV/LSB

- Support current sense of integrated power stage

- Low latency protection comparators for OCP and positive/negative peak current limit

- Up to 2 differential sense channels for secondary current, primary current or second-loop current

sensing

? Up to 12 high resolution Digital Pulse Width Modulated (DPWM) outputs

- 78.125 ps pulse width resolution

- Adjustable phase shift between outputs

- PWMx remappable

- Cycle-by-cycle duty-cycle matching

- Adjustable dead-time between pairs for both rising and falling edges

- Dead-time resolution 1.25 ns

- Up to 2 MHz switching frequency

- Frequency/period resolution 20ns

? Configurable PWM edge alignment

- Trailing modulation (leading edge aligned)

- Leading modulation (trailing edge aligned)

- Triangular modulation (center aligned PWM)

? Configurable feedback control

- Voltage mode

- Peak current mode

- Constant current mode

- Constant power mode

? Configurable modulation methods

- Pulse width modulation

- Phase shift modulation

? Up to 16 GPIO pins

? Soft start/ Stop with and without prebias

? Feed forward compensation without primary voltage sensing

? High efficiency and light load management

- Burst mode

- Diode emulation

- Low standby power

? Copper trace current sensing

- Temperature compensation 3900 ppm/?C

? Flux balancing

? Phase current balancing

? Feature rich fault protections

- Programmable over and under voltage protection (OVP, UVP) thresholds and response

- Programmable over and under current protection (OCP, UCP) thresholds and response

- Programmable over and under temperature protection (OTP, UTP) thresholds and hysteresis

- Programmable positive/ negative peak current limit threshold

- Internal and external temperature sensor

- SR negative current protection

- Feedback open loop protection

- Programmable blanking time

? Synchronization with external clock

? 6-channel, 9-bit, 1Msps general purpose ADC

? Communication peripherals

- 1 MHz I2C/PMBUS with customizable command set

- Optional support for secondary serial port: I2C M/S

- Full duplex UART

? Firmware enhanced capability for application features customization

- PMBus commands

- GPIO functionality

- Protection and fault detection/ monitoring

- Control enhancement