FSL126HR Fairchild Semiconductor, FSL126HR Datasheet
FSL126HR
Specifications of FSL126HR
Related parts for FSL126HR
FSL126HR Summary of contents
Page 1
... FSL126HR offers good soft-start performance. When compared to a discrete MOSFET and controller or RCC switching converter solution, the FSL126HR reduces total component count, design size, and weight; while increasing efficiency, productivity, and system reliability. This device provides a basic platform that is well suited for the design of cost-effective flyback converters ...
Page 2
... Typical Application Diagram Internal Block Diagram © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 Figure 1. Typical Application Figure 2. Internal Block Diagram 2 www.fairchildsemi.com ...
Page 3
... Drain switching a maximum of 650V. Minimizing the length of the trace connecting these pins to the transformer decreases leakage inductance. © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 Figure 3. Pin Configuration ) via an internal switch during startup (see Figure 2). Once STR reaches 12V, the internal switch is opened. ...
Page 4
... JC to plastic interface for thermo-couple mounted on soldering. JA 10. junction-to-top of thermal characteristic under JT couple is mounted in epoxy glue. © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 = 25°C, unless otherwise specified. J Parameter (4) (5) (6) (6) (7,8) (7,9) (7,10) test condition ...
Page 5
... Protection Voltage Feedback Blanking t OSP_FB Time (11) V AOCP Voltage AOCP TSD Shutdown Temperature Thermal (11) Shutdown HYS Hysteresis TSD t Leading-Edge Blanking Time LEB © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 Conditions 250µ 650V 10V 0V 0V 25V 1MHz GS DS ...
Page 6
... Operating Supply Current I OP2 (Control Part Only) I Startup Charging Current CH V Minimum V Supply Voltage STR STR Note: 11. Though guaranteed by design not 100% tested in production. © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 (Continued) Conditions (11 14V, V > BURH V = 14V, V < BURL ...
Page 7
... Stop Theshold Voltage (V 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 ‐40 ‐ Figure 8. Stop Threshold Voltage vs. Temperature © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 =25 OSC 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 75 100 120 140 ‐40 1 ...
Page 8
... Burst Operating Supply Current (Iop1) 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 ‐40 ‐ Figure 12. Burst Operating Supply Current vs. Temperature © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 (Continued) =25 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 75 100 120 140 ‐ ...
Page 9
... EMI requirements. Figure 15. Frequency Fluctuation Waveform © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 Feedback Control FSL126HR employs current-mode control, as shown in Figure 16. An opto-coupler (such as the FOD817A) and pin, as illustrated shunt regulator (such as the KA431) are typically used CC to implement the feedback network ...
Page 10
... FB Figure 18. Overload Protection (OLP) © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 Abnormal Over-Current Protection (AOCP) When the secondary rectifier diodes or the transformer pin are shorted, a steep current with extremely high di/dt can flow through the SenseFET during the LEB time. ...
Page 11
... PWM comparator. An external resistance the current limit pin forms a parallel resistance with the 6kΩ when the internal diodes are biased by the main current source of 400µA. For example, FSL126HR has a typical SenseFET peak current limit (I adjusted inserting Rx between the I the ground. The value of the Rx can be estimated by the following equations: 1 ...
Page 12
... 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/. © 2011 Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 9.83 9.00 6.67 6.096 3 ...
Page 13
... Fairchild Semiconductor Corporation FSL126HR • Rev. 1.0.0 13 www.fairchildsemi.com ...