SG6742HRSY Fairchild Semiconductor, SG6742HRSY Datasheet
SG6742HRSY
Specifications of SG6742HRSY
Available stocks
Related parts for SG6742HRSY
SG6742HRSY Summary of contents
Page 1
... Operating Part Temperature Number Range SG6742HLSY -40 to +105°C SG6742HRSY -40 to +105°C For Fairchild’s definition of “green” Eco Status, please visit: http://www.fairchildsemi.com/company/green/rohs_green.html. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 Description The highly integrated SG6742HL/HR PWM controller provides several features to enhance the performance of flyback converters ...
Page 2
... Application Diagram Internal Block Diagram SG6742HR SG6742HL © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 Figure 1. Typical Application Figure 2. Functional Block Diagram 2 www.fairchildsemi.com ...
Page 3
... Power supply. The internal protection circuit disables PWM output as long VDD OVP trigger point. 8 GATE The totem-pole output driver. Soft driving waveform is implemented for improved EMI. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 ZXYTT 6742HL TPM Figure 3. Top Mark SOP-8 ...
Page 4
... All voltage values, except differential voltages, are given with respect to the network ground terminal. 2. Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 Parameter (1, 2) ＜50°C) ...
Page 5
... OSC t Hopping Period HOP f Green-Mode Frequency OSC-G Frequency Variation vs Deviation Frequency Variation vs Temperature Deviation PWM Frequency f OSC f OSC-G © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 Conditions V – 0.16V DD-ON V =15V, GATE Open DD V +0.1V TH-OLP V =90V (V =120V =0V DD HV=500V, V ...
Page 6
... Notes: 3. When activated, the output is disabled and the latch is turned off. 4. The threshold temperature for enabling the output again and resetting the latch after OTP has been activated. © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 (Continued) Conditions FB Pin Open ...
Page 7
... Temperature (℃) Figure 10. Supply Current Drawn from HV Pin (I vs. Temperature 105 103 101 -40 -30 - Temperature (℃) Figure 12. Frequency in Normal Mode (f vs. Temperature © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0 100 125 -40 Figure 7. Operation Supply Current (I ) vs. Temperature DD- ...
Page 8
... Temperature (℃) Figure 18. Over-Temperature Protection Threshold Voltage (V ) vs. Temperature RTTH1 -40 -30 - Temperature (℃) Figure 20. V Over-Voltage Protection (V DD vs. Temperature © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0 100 125 -40 ) vs. Figure 15. Delay Time of FB Pin Open-Loop Protection FB-OLP 100 99 98 ...
Page 9
... This UVLO hysteresis window ensures that hold-up capacitor is adequate to supply V during startup. DD © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 Gate Output / Soft Driving The BiCMOS output stage is a fast totem-pole gate driver. Cross conduction has been avoided to minimize heat dissipation, increase efficiency, and enhance reliability ...
Page 10
... PWM is turned off after RTTH1 20ms ( less than 0.7V (V D-OTP1 RT turned off immediately after 130µs (t © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 (Continued) Noise Immunity , Noise on the current sense or control signal may cause A significant pulse-width jitter, particularly in continuous- conduction mode ...
Page 11
... EC 1000µF/25V C8 EC 470µF/25V C9 EC 22µF/50V C10 CC 47pF/50V C11 CC 2200pF/50V C12 CC 0.01µF/50V D1 Zener Diode 15V 1/2W (option) D2 BYV95C D3 FR103 D4 1N4007 F1 FUSE 4A/250V L1 Inductor (900µH) L2 Inductor (2µH) © 2008 Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 BD1 VZ1 SG6742MR U1 C9 ...
Page 12
... 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’ ...
Page 13
... Fairchild Semiconductor Corporation SG6742HL/HR • Rev. 1.0.4 13 www.fairchildsemi.com ...