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3732

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Package : SOP7
With MOSFET : Built-in
MOSFET/BJT : BJT
BVdss : 840V
RDS(on) : 1A
Standby Power : --
CC/CV Precision : ±5%
Max Vdd : 8V
Max Oper.Frequency : 70K
Output Power : 5W
Product details

product description

3732 is a low-cost constant current and constant voltage primary feedback controller. The system does not require power supply windings and power supply diodes, which greatly reduces production costs. Suitable for various low-power AC/DC charger and adapter applications.
In the constant current control mode, the output current can be adjusted by changing the resistance of the Rcs resistor connected to the CS pin. In the constant voltage control mode, the 3732 uses a variety of working modes to obtain high conversion efficiency and small audio abnormal noise. The 3732 has built-in output line loss compensation, and the compensation ratio can be adjusted by modifying the feedback resistance value to meet the requirements of various output wire loss and can effectively compensate the output current
The line loss and voltage drop caused on the output line. 3732 works in PFM under constant current mode and heavy load, while reducing Ipeak and working frequency at light load and medium load at the same time to optimize conversion efficiency and avoid abnormal audio noise.
3732 has multiple protection functions, including output open circuit, short circuit protection, over temperature protection, etc.
3732 adopts SOP-7 package.

 

main feature

Integrated high voltage start device
No need for power supply winding and power supply diode built-in power transistor
High precision of constant voltage and constant current
Adjustable output line loss compensation
Built-in input line voltage compensation
Output open circuit, short circuit protection
Over temperature protection

 

Scope of application

Adapter and charger LED drive power for mobile phones, cordless phones, PDAs, MP3s and other portable devices
Linear voltage and RCC switching power supply upgrades
Auxiliary power supply for PC, TV and other equipment

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3732
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