sg5851 Fairchild Semiconductor, sg5851 Datasheet
sg5851
Available stocks
Related parts for sg5851
sg5851 Summary of contents
Page 1
... To protect the external power MOSFET from being damaged by supply over voltage, the output driver is clamped at 17V. SG5851 controllers, available in an SOP package, can be used to improve the performance and reduce the production cost of power supplies. -40°C to +85°C 8-pin Small Outline Package (SOP) -40° ...
Page 2
... Application Diagram Block Diagram © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 Figure 1. Typical Application Figure 2. Function Block Diagram 2 www.fairchildsemi.com ...
Page 3
... PWM output is disabled. This activates over-current protection. This pin also provides current amplitude information for current-mode control. 7 VDD Power Supply. 8 GATE Driver Output. The totem-pole output driver for driving the power MOSFET. © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0 VDD SENSE ...
Page 4
... The Recommended Operating Conditions table defines the conditions for actual device operation. Recommended operating conditions are specified to ensure optimal performance to the datasheet specifications. Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol T Operating Ambient Temperature A © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 Parameter Parameter 4 Min. Max. Unit ...
Page 5
... Output Voltage Low GATE-L V Output Voltage High GATE-H t Rising Time r t Falling Time f V GATE- Output Clamp Voltage CLAMP © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 Conditions V =V – 0.1V DD DD-ON V =15V, GATE with DD 1nF to GND Auto Restart Auto Restart R =95KΩ =13 ...
Page 6
... This UVLO hysteresis window ensures that the hold-up capacitor is adequate to supply V Gate Output The SG5851 BiCMOS output stage is a fast totem-pole gate driver. Cross conduction has been avoided to minimize heat dissipation, increase efficiency, and enhance reliability. The output driver is clamped by an internal 17V Zener diode to protect power MOSFET transistors against undesired over-voltage gate signals ...
Page 7
... Temperature ( ℃ ) Figure 6. I DD-ST 70.0 69.8 69.6 69.4 69.2 69.0 -40℃ -25℃ -10℃ 5℃ 20℃ 35℃ 50℃ Temperature (℃) Figure 8. f OSC © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 14.000 13.000 12.000 11.000 10.000 9.000 8.000 vs 2.000 1.800 1.600 1.400 1.200 -40℃ -25℃ -10℃ 5℃ vs ...
Page 8
... Temperature (℃) Figure 12. t LEB © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 2.30 2.28 2.26 2.24 2.22 2.20 65℃ 80℃ 95℃ 110℃ 125℃ vs 65℃ 80℃ 95℃ 110℃ 125℃ ...
Page 9
... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0 ...
Page 10
... Package specifications do not expand the terms of Fairchild’s worldwide terms and conditions, specifically the warranty therein, which covers Fairchild products. Always visit Fairchild Semiconductor’s online packaging area for the most recent package drawings: http://www.fairchildsemi.com/packaging/ © 2007 Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 (Continued ...
Page 11
... Fairchild Semiconductor Corporation SG5851 • Rev. 1.0.0 11 www.fairchildsemi.com ...