SG6846LDZ Fairchild Semiconductor, SG6846LDZ Datasheet
SG6846LDZ
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SG6846LDZ Summary of contents
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... Ordering Information Part Operating Temperature Number Range SG6846LSZ -20 to +85°C SG6846LSY -20 to +85°C SG6846LDZ -20 to +85°C SG6846LDY -20 to +85°C For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Description The ...
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... Typical Application Block Diagram © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...
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... Marking Information SG6846FTP XXXXXXXXYWWV ※ Marking for SG6846LSZ (Pb-free) SG6846LDZ (Pb-free) ※ Marking for SG6846LSY (Green-compound) SG6846LDY (Green-compound) © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3 OTP Latch DIP SOP Lead Free + ROHS Compatible Null = Regular Package XXXXXXXX: Wafer Lot Y: Year ...
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... VDD Power Supply 8 GATE Driver Output © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Figure 5. Pin Configuration Description Ground. The signal from the external compensation circuit is fed into this pin. The FB pin and the current-sense signal from Pin 6 determine the PWM duty cycle. ...
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... 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 © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Parameter SOP DIP SOP DIP ...
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... Threshold Voltage for Current Limit STH3V V OCP Threshold Voltage for Current Limit STH1V-2/3 V OCP Threshold Voltage for Current Limit STH3V-2/3 t Delay Time for OTP D-OCP © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Conditions to Exit DD V – 0.16V DD-ON GATE Open R = 26kΩ ...
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... Slope for Green-Mode Modulation G f Frequency Variation vs Frequency Variation vs. Temperature f DT Deviation Frequency f : 65KHz OSC .5KHz OSC -GREEN f : 0Hz OSC -OFF © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 (Continued) Conditions R = 26kΩ 26kΩ 26kΩ I Deviation V = 11.5V to 20V -20 to 85° ...
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... V RT-RLS (for Non-Latch-Off Version) R Section Operating Range NOR I RI Maximum R Value for Protection MAX I RI Minimum R Value for Protection MIN I © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 (Continued) Conditions V = 15V 50mA OUT V = 12V 50mA OUT V = 15V, DD GATE = 1nF V = 15V, ...
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... Temperature (°C) Figure 9. Startup Current vs. Temperature 1. 000 0. 900 0. 800 0. 700 0. 600 0. 500 0. 400 -40 -25 - perature (°C) ) Figure 11. PWM Turn-Off Threshold Voltage vs. Temperature © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3 110 125 110 125 1.000 0.900 0.800 0.700 0.600 ...
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... Figure 15. Current-Limit Threshold vs. V 78.000 77.000 76.000 75.000 74.000 73.000 72.000 71.000 70.000 -40 -25 - Temperature (°C) Figure 17. Output Current of RT Pin (I vs. Temperature © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 (Continued 110 125 Figure 14. PWM Frequency vs. FB Voltage (R 0.8 0.6 0.4 0 ...
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... open circuit or short circuit to ground occurs at the RI pin, the internal protection circuit immediately shuts down the controller. © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 Two-Level Over-Current Protection (OCP) Cycle-by-cycle current limiting shuts down the PWM immediately when the switching current is over the peak-current threshold ...
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... Good placement and layout practices should be followed. Avoid long PCB traces and component leads. Compensation and filter components should be located near the SG6846. © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 (Continued) Slope compensation 12 Figure 19 ...
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... R7 27KΩ +/-5% R6 330Ω +/-1% R19 102KΩ +/-1% R14 0Ω22 +/-5% R16, R17 1W 20Ω +/-5% R11 20KΩ +/-5% R12 100KΩ +/-5% R20 887KΩ +/-1% R22 10KΩ +/-1% © 2008 Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 BD1 LF2 CX2 R12 ...
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... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...
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... Package drawings are provided as a service to customers considering Fairchild components. Drawings may change in any manner without notice. Please note the revision and/or date on the drawing and contact a Fairchild Semiconductor representative to verify or obtain the most recent revision. 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’ ...
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... Fairchild Semiconductor Corporation SG6846 • Rev. 1.3.1 16 www.fairchildsemi.com ...