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SP6551FL
A secondary synchronous rectifier chip used in isolated flyback power supply systems
- Product Description
-
- Commodity name: SP6551FL
- 封装: SOP8
- 品牌: Wuxi Silicon Power Microelectronics
A secondary synchronous rectifier chip used in isolated flyback power supply systems
The SP6551FL is a secondary synchronous rectifier chip used in isolated flyback power supply systems. It simulates the operation of a secondary Schottky rectifier diode and reduces losses with extremely low on-resistance. The SP6551FL can operate in discontinuous conduction mode (DCM) and quasi-resonant mode (QR). Advanced blanking technology ensures stable and reliable operation in various operating modes.
The SP6551FL detects the voltage drop across the on-resistance (Rds-on) of the built-in MOSFET to control the switching of the MOSFET. It features simple peripheral applications and a fixed solution for 5V output applications.
Typical Application Diagram
Features
● Built-in 21mΩ/45V power NMOS transistor
● Extremely low quiescent current
● Maximum operating frequency up to 70kHz
● Driver pin impedance pull-down resistor 1.2Ω, pull-up resistor 3.0Ω
● 50ns turn-off delay time
● VCC operating voltage range 3.5V～5.5V
● VCC overvoltage protection
● Cycle-by-cycle minimum on-time detection prevents mis-triggering
● Operates in discontinuous conduction mode (DCM) and quasi-resonant mode (QR)
● SOP-8 lead-free package
Applications
● 5V AC/DC power adapter
● Battery charger
● Digital camera charger
Product Message
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