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CY3783B

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Package : SOP-7
With MOSFET : Built-in
MOSFET/BJT : BJT
BVdss : 800V
RDS(on) : --
Standby Power : <75mW
CC/CV Precision : ±4%
Max Vdd : 24V
Max Oper.Frequency : 60K
Output Power : 5V/2.4A
Product details

product description

CY3783B is a high-performance switching power supply chip used in primary-side sampling and control. Its built-in power BJT can be used for offline switching power supply products within 12W. CY3783B adopts PFM control mode when working in constant current mode, and adopts PWM+PFM control mode when working in constant voltage mode, so that high-precision constant voltage and constant current control effects can be obtained without any secondary sampling and control circuits .
At the same time, CY3783B also has built-in input line voltage compensation and output cable compensation, so that a better voltage and current adjustment rate can be obtained.
CY3783B has a large number of built-in compensation and protection functions, which simplifies the peripheral circuit, facilitates PCB layout and EMI design, improves the reliability of the solution, and reduces the cost of the solution.

 

main feature

Primary side control does not require optocoupler and secondary control circuit
PWM+PFM multi-mode mixed control
Built-in 800V power BJT
±4% constant voltage accuracy and high constant current accuracy within the full voltage range
No-load power consumption in typical applications <75mW @230V
Built-in soft start circuit
Built-in output line compensation
Built-in frequency jitter
Ultra-low startup power consumption (< 5uA)
Built-in over-current protection, over-voltage protection, short-circuit protection, over-temperature protection and other protection functions
Cycle-by-cycle current limit
Dynamic transistor base drive
Applicable power 12W
SOP7 package

 

Scope of application

Mobile phone battery charger
AC/DC power adapter and LED lighting

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CY3783B
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