SG6858DZ Fairchild Semiconductor, SG6858DZ Datasheet
SG6858DZ
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SG6858DZ Summary of contents
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... Offline High Brightness (HB) LED drivers Ordering Information Part Number Operating Temperature Range SG6858TZ SG6858DZ For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Description This highly integrated PWM controller provides several special enhancements designed to meet the low standby-power needs of low-power SMPS ...
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... Typical Application L EMI AC Input Filter N 5 VDD SG6858 FB 2 GND Block Diagram OVP 25V Internal VDD 5(2) BIAS UVLO 16.5V/11.5V SOT(DIP) © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Bridge Rectifier Diode Bulk Start VDD + C VDD N A GATE SENSE Figure 1. Typical Application ...
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... SENSE GND © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Figure 3. SSOT-26 Figure 4. DIP-8 GAT VDD SENS E 4 Figure 5. Pin Configurations Totem-pole output driver for the power MOSFET. Power supply. No connection. Current sense. This pin senses the voltage across a resistor. When the voltage reaches the internal threshold, PWM output is disabled ...
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... Fairchild does not recommend exceeding them or designing to Absolute Maximum Ratings. Symbol V DC Supply Voltage DD T Operating Ambient Temperature A © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Parameter SSOT DIP Human Body Model, JESD22-A114 Machine Model, JESD22-A115 Parameter 4 Min ...
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... MAX V Output Voltage Low GATE-L V Output Voltage High GATE-H t Rising Time R t Falling Time F V Output Clamp Voltage GATE-CLAMP © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2 unless otherwise specified Test Condition DD-ON V =15V, GATE with DD 1nF to GND R =95kΩ ...
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... Temperature (℃) Figure 8. Startup Current (I Frequenc -40 -25 - Temperature (℃) Figure 10. Frequency (f OSC © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2 DD-O N 12.5 12.1 11.7 11.3 10.9 10 110 125 ) Figure 7. Turn-Off Threshold Voltage (V DD- Temperature 3.5 3.0 2.5 2.0 1.5 ...
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... Figure 12. Green Mode Entry FB Voltage (V vs. Temperature Leading-Edge Blank ing Time (t 350 330 310 290 270 250 -40 -25 - Tem perature (℃) Figure 14. Leading-Edge Blanking Time (t vs. Temperature © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 (Continued 2.50 2.40 2.30 2.20 2.10 2.00 V =15V DD 1. ...
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... Conventional RC filtering can therefore be omitted. During this blanking period, the current-limit comparator is disabled and it cannot switch off the gate driver. © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2 Constant Output Power Limit When the SENSE voltage across the sense resistor R reaches the threshold voltage (around 0 ...
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... The output driver is clamped by an internal 17V Zener diode to protect power MOSFET transistors against undesired over-voltage gate signals. © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Built-in Slope Compensation The sensed voltage across the current sense resistor is ...
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... FB 2 Transformer - Core: EF-20 - Primary-Side Inductance: 2mH (Pin1 to Pin3 105Turns 18Turns 0.3Φ*2 0.27Φ* 22Turns 0.25Φ*1 2 © 2008 Fairchild Semiconductor Corporation SG6858 • Rev. 1.2.4 Input Voltage Range 90~264V AC IN4007*4 10nF/1KV 22µF/400V Bulk 66kΩ R Start R 47Ω ...
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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 SG6858 • Rev. 1.2.4 13 www.fairchildsemi.com ...