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Fairchild FSDH0265RL Manual

Manual is about: Green Mode Fairchild Power Switch

Summary of FSDH0265RL

  • Page 1

    ©2005 fairchild semiconductor corporation www.Fairchildsemi.Com rev.1.0.5 fps tm is a trademark of fairchild semiconductor corporation. Features • internal avalanche rugged sense fet • consumes only 0.65w at 240vac & 0.3w load with advanced burst-mode operation • frequency modulation for emi reducti...

  • Page 2

    Fsdh321, fsdl321 2 internal block diagram figure 2. Functional block diagram of fsdx321 8v/12v 2 6,7,8 1 3 vref internal bias s q q r osc vcc vcc i delay i fb v sd tsd vovp vcc vocp s q q r r 2.5r vcc good vcc drain vfb gnd aocp gate driver 5 vstr i ch vcc good v burl /v burh leb pwm + - 4 ipk freq....

  • Page 3

    Fsdh321, fsdl321 3 pin definitions pin configuration figure 3. Pin configuration (top view) pin number pin name pin function description 1 gnd sense fet source terminal on primary side and internal control ground. 2 vcc positive supply voltage input. Although connected to an auxiliary transform- er ...

  • Page 4

    Fsdh321, fsdl321 4 absolute maximum ratings (ta=25 °c, unless otherwise specified) note: 1. Repetitive rating: pulse width is limited by maximum junction temperature 2. L = 24mh, starting tj = 25 °c thermal impedance (ta=25 °c, unless otherwise specified) note: 1. Free standing with no heatsink; wit...

  • Page 5

    Fsdh321, fsdl321 5 electrical characteristics (ta = 25 °c unless otherwise specified) note: 1. Pulse test: pulse width ≤ 300us, duty ≤ 2% 2. These parameters, although guaranteed, are tested in eds (wafer test) process 3. These parameters, although guaranteed, are not 100% tested in production param...

  • Page 6

    Fsdh321, fsdl321 6 comparison between fsdm311 and fsdx321 function fsdm311 fsdx321 fsdx321 advantages soft-start 15ms 15ms (same for both devices) • gradually increasing current limit during soft-start further reduces peak current and voltage stresses • eliminates external components used for soft-s...

  • Page 7

    Fsdh321, fsdl321 7 typical performance characteristics (control part) (these characteristic graphs are normalized at ta = 25 °c) 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 t emp[℃] normalized operating frequency (fosc) vs. Ta 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 t emp[℃] no r...

  • Page 8

    Fsdh321, fsdl321 8 typical performance characteristics (continued) 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 t emp[℃] no rm al iz ed feedback source current (i fb ) vs. Ta 0.00 0.20 0.40 0.60 0.80 1.00 1.20 -50 0 50 100 150 t emp[℃] no rm al ized peak current limit (i lim ) vs. Ta 0.00 0.2...

  • Page 9

    Fsdh321, fsdl321 9 functional description 1. Startup : in previous generations of fairchild power switches (fps tm ) the vstr pin had an external resistor to the dc input voltage line. In this generation the startup resistor is replaced by an internal high voltage current source and a switch that sh...

  • Page 10

    Fsdh321, fsdl321 10 figure 6. Over load protection (olp) 4.2 thermal shutdown (tsd) : the sense fet and the control ic are integrated, making it easier for the control ic to detect the temperature of the sense fet. When the tem- perature exceeds approximately 145 °c, thermal shutdown is activated. 4...

  • Page 11

    Fsdh321, fsdl321 11 5. Soft start : the fps has an internal soft start circuit that slowly increases the feedback voltage together with the sense fet current after it starts up. The typical soft start time is 15msec, as shown in figure 8, where progressive increments of the sense fet current are all...

  • Page 12

    Fsdh321, fsdl321 12 figure 11. Ka5-series fps full range emi scan(67khz, no frequency modulation) with dvd player set figure 12. Fsdx-series fps full range emi scan (67khz, with frequency modulation) with dvd player set 8. Adjusting peak current limit : as shown in figure 13, a combined 2.8k Ω inter...

  • Page 13

    Fsdh321, fsdl321 13 application tips 1. Methods of reducing audible noise switching mode power converters have electronic and magnetic components, which generate audible noises when the operating frequency is in the range of 20~20,000 hz. Even though they operate above 20 khz, they can make noise de...

  • Page 14

    Fsdh321, fsdl321 14 typical application circuit features • high efficiency (>70% at full load, full input range) • low standby mode power consumption ( • low component count • enhanced system reliability through various protection functions • low emi through frequency modulation • internal soft-star...

  • Page 15

    Fsdh321, fsdl321 15 2. Transformer schematic diagram 3. Winding specification 4. Electrical characteristics 5. Core & bobbin core : eer1625 bobbin : eer1625 ee1625 n p /2 n a 1 2 3 4 5 6 7 8 n 5v n m vcc 9 10 n p /2 n a n m vcc n 5v n p /2 n p /2 p in (s → f ) w ire t u rns w in d in g m eth o d n p...

  • Page 16

    Fsdh321, fsdl321 16 6. Demo circuit part list part value note part value note resistor inductor r101 680k 1w l201 10uh - r102 100k 1w - r103 10 1/4w diode r104 10 1/4w d101 uf4007 pn ultra fast r201 1k 1/4w d102 1n4937 pn ultra fast r202 330 1/4w d103 1n4937 pn ultra fast r203 2k 1/4w d201 sb360 sch...

  • Page 17: 8Dip

    Fsdh321, fsdl321 17 package dimensions 8dip.

  • Page 18: 8Lsop

    Fsdh321, fsdl321 18 package dimensions (continued) 8lsop.

  • Page 19

    Fsdh321, fsdl321 19 ordering information product number package marking code bv dss f osc r ds(on) fsdh321 8dip dh321 650v 100khz 14 Ω fsdl321 8dip dl321 650v 50khz 14 Ω fsdh321l 8lsop dh321 650v 100khz 14 Ω fsdl321l 8lsop dl321 650v 50khz 14 Ω.

  • Page 20

    Fsdh321, fsdl321 9/29/05 0.0m 001 © 2005 fairchild semiconductor corporation life support policy fairchild’s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. As ...