VPC2187/8 current mode PWM controller 4-100VIN ultra-wide voltage startup, highly integrated power control chip recommended

1 Features
 Ultra-wide input voltage range 4V~100V startup circuit

 Suitable for various topologies of flyback\Boost\Buck

 Current limiting threshold voltage 156mV and 500mV optional

 Single-resistor programmable oscillator frequency

 Step-by-step analog frequency reduction optimization efficiency curve for light load

 No-load intermittent operation to achieve low no-load power consumption

 Enable shutdown current as low as 0.1uA

 Cycle-by-cycle current limiting protection, short circuit protection, over temperature protection

 Leading edge blanking of current sense signal

 Built-in slope compensation circuit

 Can accurately set input under-voltage protection and hysteresis

 Optional built-in or external soft-start

 Built-in loop PSR control in CCM/DCM mode

 Direct optocoupler interface

 MSOP10 ultra-small package form

2 Application Areas

 Intermittent (DCM)/Continuous (

CCM) mode flyback converter

 Industrial Power Conversion

 BMS Auxiliary Power

 POE power supply

 Isolated communication power supply

3 Description

The VPC218X series is suitable for a variety of topologies

(Flyback\Buck\ Boost) and output voltage feedback method

(

SSR\PSR\resistor divider) highly integrated power control chip.Collection

Becomes an ultra-wide range start-up circuit as low as 4V and as high as 100V.Internal

Integrated anti-backflow diode prevents backflow of current from VDD to VIN

end.

The VPC218X integrates a current-sampling differential amplifier to greatly improve

Increase the sampling signal-to-noise ratio and reduce the current-limiting threshold voltage of the CS port to

156mV, which can greatly reduce the power consumption of the current sampling circuit, using no current

Transformer design, which reduces cost and improves reliability.

The VPC218X controller is fixed to work at the set point under heavy load

PWM modulation at the maximum operating frequency, as the load is reduced to a

To a certain extent, the controller optimizes the full negative by simulating the down-frequency working mode step by step

Efficiency at load range while obtaining lower light-load ripple voltage and no-load power

Consumption.

VPC218X can achieve PSR inversion at hundreds of kHz operating frequency

Feed-in mode, the built-in output voltage sampling circuit can work in CCM at the same time

In and DCM mode, the time width of the sampling voltage is as low as

350nS; built-in loop compensation circuit with fast dynamic response function

Road, so that the stability and dynamic indicators of the switching power supply have better performance.

VPC218X has precisely programmable input undervoltage protection and hysteresis,

Output short circuit protection, output overvoltage protection, over temperature protection and other functions, full range

Ensure the high reliability of the switching power supply.

More power control chip resources can be provided if you need to contact