FAN6862 Fairchild Semiconductor, FAN6862 Datasheet
FAN6862
Available stocks
Related parts for FAN6862
FAN6862 Summary of contents
Page 1
... UVLO lower limit. This green-mode function enables power supplies to meet international power conservation requirements. The FAN6862 is designed for SMPS and integrates a frequency-hopping function that helps reduce EMI emission of a power supply with minimum line filters. ...
Page 2
... Typical Application Block Diagram © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 Figure 1. Typical Application Figure 2. Block Diagram 2 www.fairchildsemi.com ...
Page 3
... VDD 1 6 GATE © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 Figure 3. Top Mark Ground. Feedback. The FB pin provides the output voltage regulation signal. It provides feedback to the internal PWM comparator, so that the PWM FB comparator can control the duty cycle. This pin also provide for OLP larger than the trigger level and delays for a long time, the controller stops and restarts ...
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 © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 Parameter SSOT-6 <50°C A DIP-8 SSOT-6 DIP-8 ...
Page 5
... Reduction V FB Voltage at f FB-G OSC Threshold Voltage for Zero Duty FB-ZDC f Frequency Variation vs Frequency Variation vs. Temperature f DT Deviation © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 Test Condition V –0.16V DD-ON C =1nF L GATE open =5V DD Duty>51% Duty=0% Duty=DCY MAX ...
Page 6
... Threshold Voltage for Over-Temperature V OTP Protection t Over-Temperature Debounce Time DOTP nd 2 Threshold Voltage for Over-Temperature V OTP2 Protection Over-Temperature Debounce Time DOTP2 © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 (Continued) Parameter Test Condition V =15V =8V =1nF L C =1nF L V =20V DD T =25° ...
Page 7
... Turn-on Threshold Voltage (V vs. Temperature 4.5 4.1 3.7 3.3 2.9 2.5 -40 -30 - Temperature (ºC) Figure 8. Operating Current (I vs. Temperature -40 -30 - Temperature (ºC) Figure 10. Center Frequency (f © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 9.5 9.1 8.7 8.3 7.9 7 100 125 -40 ) Figure 7. DD-ON 26 25.6 25.2 24.8 24 100 125 -40 ) Figure 9. DD-OP 2.2 2 ...
Page 8
... Temperature (ºC) Figure 14. Open-Loop Protection Delay Time (t vs. Temperature 0.55 0.51 0.47 0.43 0.39 0.35 -40 -30 - Temperature (ºC) Figure 16. Valley Threshold Voltage for Current Limit (V ) vs. Temperature STHVA © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 (Continued) 4.9 4.8 4.7 4.6 4.5 4 100 125 - Figure 13. Threshold Voltage for Open-Loop OSC-G FB-G 0.6 ...
Page 9
... Temperature (ºC) Figure 18. Maximum Duty Cycle (DCY vs. Temperature -40 -30 - Temperature (ºC) Figure 20. Falling Time (t © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 (Continued) 200 180 160 140 120 100 100 125 -40 ) Figure 19. Rising Time (t MAX 120 ...
Page 10
... V FB PWM frequency starts to linearly decrease from 65KHz to 22.5kHz to reduce the switching losses decreases below V (2.1V), the switching frequency FB-G is fixed at 22.5kHz and FAN6862 enters “deep” green mode, where the operating current decreases to 2.5mA (maximum), further reducing consumption decreases below V FB FAN6862 enters burst-mode operation ...
Page 11
... AC power line. Figure 26. Auto Restart Operation Over-Current Protection (OCP) FAN6862 has over-current protection thresholds for pulse-by-pulse current limit, which turns off MOSFET for the remainder of the switching cycle when the sensing voltage of MOSFET drain current reaches the threshold ...
Page 12
... FAN6862 has a sawtooth current limit threshold that increases progressively within a switching cycle, which provides lower current limit for high line and makes the actual power limit level almost constant over different line voltages of universal input range, as shown in Figure 28 ...
Page 13
... LED1 LED C1 CC 1nF C2 XC 0.33µF/275V C3 YC 470pF/400V C4 EC 82µF/400V C5 CC 4.7nF/1KV C6, C11 EC 680µF/25V C7 CC 1nF © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 BD1 BD 2A/600V N-0211 472pF/1KV R4 R 100K/1206 R 750K/1206 + C4 C82uF/450V D2 D 1N4007 ...
Page 14
... 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/. © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 14 www.fairchildsemi.com ...
Page 15
... 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/ © 2009 Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 9.83 9.00 6.67 6.096 3 ...
Page 16
... Fairchild Semiconductor Corporation FAN6862 • Rev. 1.0.2 16 www.fairchildsemi.com ...