SD4954B
SD4954B is POWERED DEVICE (PD) AND DC/DC CONTROLLER manufactured by Silan.
DESCRIPTION
SD4954B is an Ethernet powered device and DC/DC controller IC patible with IEEE 802.3af standard. It provides powered devices (PD) with functions of detection, classification and inrush current limit.
SD4954B integrates a 100V power MOSFET with on-resistance of 0.6Ω, and features built-in current limit, undervoltage protection and over temperature protection.
SOP-16-225-1.27
The DC/DC controller integrates a 200V power MOSFET with SSR control. It is suitable for Flyback and buck topology, providing accurate CV 3.APPLICATIONS control loop. It features high system efficiency and good EMI characteristic.
- Security Cameras
- IP phones
2.FEATURES
- Wireless Access Points
PD controller
- IEEE 802.3af pliant
- 100V 0.6Ω On-chip MOSFET
- Undervoltage lockout
- Over temperature protection
- 180m A inrush current limit
- 850m A operating current
- Fault automatic retry
DC/DC controller
- Fixed switching frequency control
- Internal error amplifier
- Leading-Edge Blanking
- Maximum duty cycle limit
- No-load sleep mode
- Soft startup
- Internal 200V MOSFET
- VCC over voltage protection
- VCC undervoltage lockout
- Over temperature protection
- Over load protection
- Cycle-by-cycle current limit
HANGZHOU SILAN MICROELECTRONICS CO.,LTD http: //.silan..cn
2022.01.14 共6页 第1页
SD4954B Datasheet
4.ORDERING INFORMATION
Part No.
SD4954B SD4954BTR
Package
SOP-16-225-1.27 SOP-16-225-1.27
Marking
SD4954B...
