System General SG5841 SG5841DZ Highly Integrated Green-Mode PWM Controller 8-Pin DIP
Description:
To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to continuously decrease the switching frequency at light-load conditions.
To further reduce power consumption, SG5841/J is manufactured using the BiCMOS process. This allows a low start-up current, around 14μA, and an operating current of only 4mA. The SG5841/J built-in synchronized slope compensation achieves stable peak-current-mode control. The proprietary internal sawtooth power-limiter ensures constant output power limit over a wide range of AC input voltages, from 90VAC to 264VAC.
SG5841/J provides many protection functions. In addition to cycle-by-cycle current limiting, the internal open-loop protection circuit ensures safety should an open-loop or output-short-circuit failure occur. PWM output is disabled until VDD drops below the UVLO lower limit, then the controller starts again. An external NTC thermistor can be applied for over-temperature protection.
Features:
- Green-Mode PWM Controller
- Low Start-Up Current (14μA)
- Low Operating Current (4mA)
- Programmable PWM Frequency with Hopping
- Peak-Current-Mode Control
- Cycle-by-Cycle Current Limiting
- Synchronized Slope Compensation
- Leading-Edge Blanking
- Constant Output Power Limit
- Totem Pole Output with Soft Driving
- VDD Over-Voltage Clamping
- Programmable Over-Temperature Protection (OTP)
- Internal Open-Loop Protection
- VDD Under-Voltage Lockout (UVLO)
- GATE Output Maximum Voltage Clamp (18V)
- Manufacturer : System General Corp.
- Part Number : SG5841DZ
- Package : 8-Pin DIP
- Similar items :SG5841JDZ
Application:
- General-purpose switch-mode power supplies
- flyback power converters, including:Power Adapters Open-Frame SMPS
Package Included:
- 1 X System General SG5841 SG5841DZ Highly Integrated Green-Mode PWM Controller 8-Pin DIP
