SG5842JA Fairchild Semiconductor, SG5842JA Datasheet
SG5842JA
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SG5842JA Summary of contents
Page 1
... SG5842A/JA built-in synchronized compensation achieves stable control. SG5842JA integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. SG5842A/JA 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 ...
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... Ordering Information Operating Part Number Temperature Range SG5842JASZ -40°C to +105°C SG5842JADZ -40°C to +105°C SG5842JASY -40°C to +105°C SG5842ASZ -40°C to +105°C (Preliminary) SG5842ASY -40°C to +105°C (Preliminary) For Fairchild’s definition of Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. Application Diagram © ...
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... Marking for SG5842JASZ (pb-free) Marking for SG5842JADZ (pb-free) Marking for SG5842ASZ (pb-free) Marking for SG5842ADZ (pb-free) ZXYTT SG5842HA TPM Marking for SG5842JASY (green-compound) Marking for SG5842ASY (green-compound) © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 Figure 2. Function Block Diagram with Frequency Hopping ...
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... VDD Power supply. The internal protection circuit disables PWM output GATE The totem-pole output driver for the power MOSFET, which is internally clamped below 18V. © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 Figure 4. Pin Configuration Description 4 is over-voltage. DD ...
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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 © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 Parameter < 50° Human Body Model, JESD22-A114 ...
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... DD I GATE=OPEN R =26KΩ =5V DD Center R =26KΩ I Frequency R =26KΩ I Hopping Range SG5842JA Only R =26KΩ I SG5842JA Only R =26KΩ =11.5V to 20V DD T =-20 to 85° Pin Open R =26KΩ =26KΩ =26KΩ Min. ...
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... O V GATE- Gate Output Clamping Voltage CLAMP I Output Current of RT Pin RT Over-Temperature Protection V RTTH Threshold Voltage t Over-Temperature Debounce D-OTP © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 (Continued) Figure 5. V vs. PWM Frequency FB Conditions V –V STHFL STHVA Maximum Duty Cycle R =26KΩ =26KΩ ...
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... V Voltage (V) DD Figure 8. Operation Current (I Operation 11.5 11.0 10.5 10.0 9.5 -40 -25 - Temperature °C Figure 10. Minimum Operating Voltage (V vs. Temperature © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 5.0 4.5 4.0 3.5 3.0 2 110 125 ) vs. Temperature Figure 7. Operating Supply Current (I IDD-ST 17.5 17.0 16.5 16.0 GATE=OPEN 15 ...
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... Performance Characteristics -40 -25 - Temperature °C Figure 12. Maximum Duty Cycle (DCY vs. Temperature Figure 14. Output Current of RT Pin (I © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 (Continued) 1.085 1.075 1.065 1.055 1.045 1.035 1.025 1.015 110 125 ) Figure 13 ...
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... I The range of the PWM oscillation frequency is designed as 47KHz ~ 109KHz. SG5842JA also integrates a frequency hopping function internally. The frequency variation ranges from around 62KHz to 68KHz for a center frequency of 65KHz. The frequency hopping function helps reduce EMI emission of a power supply with minimum line filters. ...
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... To reset the latch circuit, disconnect the AC line voltage of the power supply. © 2007 Fairchild Semiconductor Corporation SG5842A/SG582JA • Rev. 1.4.3 (Continued) Thermal Protection An external NTC thermistor can be connected from the RT pin to ground ...
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... C10 CC 222pF/50V C11 CC 470pF/50V D1 D2 Diode BYV95C D3 TVS P6KE16A D4 Diode FR103 F1 FUSE 4A/250V L1 Choke (900µH) L2 Choke (10mH) L3 Inductor (2µH) Q1 Diode 20A/100V © 2007 Fairchild Semiconductor Corporation SG5842A/SG5842JA • Rev. 1.4.3 BD1 GND GATE 2 ...
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... 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 SG5842A/SG5842JA • Rev. 1.4.3 5.00 4.80 A 3.81 ...
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... 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 SG5842A/SG5842JA • Rev. 1.4.3 6.67 6.096 3.683 3.20 3 ...
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... Fairchild Semiconductor Corporation SG5842A/SG5842JA • Rev. 1.4.3 15 www.fairchildsemi.com ...