FA5546 Fuji Electric holdings CO.,Ltd, FA5546 Datasheet
FA5546
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FA5546 Summary of contents
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... Switching Power Supply Control IC Green Mode PWM IC FA5546 / 47 (2 Stage OLP Type) Application Note AN-027E Rev.0.3 December -2008 FA5546 / 47 Fuji Electric December -2008 Fuji Electric Device Technology Co., Ltd. 1 Fuji Electric Device Technology ...
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... Fuji Electric Device Technology Co.,Ltd. and its sales agents shall not be liable for any damage that is caused by a customer who does not follow the instructions in this cautionary statement. AN-027E Rev.0.3 December -2008 FA5546 / 47 Caution - Communication equipment (Terminal) - Home appliance - Communication equipment for trunk line - Various equipment for the safety ...
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... AN-027E Rev.0.3 December -2008 FA5546 / 47 Contents ・・・・・・・・・・・・・・・・・ ・・・・・・・・・・・・・・・・・ ...
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... Overview FA5546/ current mode type switching power supply control IC possible to drive a power MOSFET directly. Despite of a small package with 8 pins, it has a lot of functions and it is best suited for power saving at the light load and decreasing external parts. Moreover it enables to realize a reduced space and a high cost-performance power supply. ...
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... Block diagram FA5546 (Overload protection : Auto recovery type) Start up Current VH ON UVLO - + Reset 5V FB × INV. AMP Lv. Shift IS Brownout + - VCC OVP + - 5V LAT LAT - + GND FA5547 (Overload protection : Latch shutdown type) Start up Current VH ON UVLO - + Reset 5V FB × INV. AMP Lv. Shift IS Brownout ...
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... LAT pin voltage VH pin input voltage Total loss (Ta = 25℃) Junction temperature in operation Storage temperature ○Allowable loss reduction characteristics 800mW (DIP) 400mW (SOP) 0 -30 AN-027E Rev.0.3 December -2008 FA5546 / 47 Pin function Symbol VCC Ioh Iol VOUT VFB VIS VLAT VVH Pd Tj ...
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... Latch-off delay timer *1 TdLAT Pulse width modulation section (FB pin) Item Symbol Maximum duty cycle Dmax Minimum duty cycle Dmin Input threshold voltage VthFB0 FB pin source current Ifb0 AN-027E Rev.0.3 December -2008 FA5546 / 47 Symbol MIN VCC 11 VVH(DC) 100 80 VVH(AC1) 80 VVH(AC2) RVH 2 CLAT 0.22 ...
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... VCC over-voltage protection Vthovp threshold voltage Output circuit section (OUT pin) Item Symbol Low output voltage High output voltage *1 Rise time *1 Fall time *1 AN-027E Rev.0.3 December -2008 FA5546 / 47 Conditions VFB=4V VFB=4V FA5546 Conditions ΔVFB/ΔVIS VFB=3V VFB=VthOLP VIS=0V Steady Start/Restart Tj=25℃ ...
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... Latch mode supply current VCC pin zenner clamp VCCzd voltage *1:This parameter is not 100% tested in production but guaranteed by design. It doesn’t guarantee the column of ‘-’ to have been specified. AN-027E Rev.0.3 December -2008 FA5546 / 47 Conditions VH=450V, IHrun VCC > VCCon VH =120V, IHstb VCC =0V VH pin： ...
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... Power supply voltage (VCC Voltage (V) FB pin voltage at frequency drop started (Vfbm) vs. Junction temperature (Tj) 1.4 1.3 1.2 1.1 1.0 0.9 - (℃) AN-027E Rev.0.3 December -2008 FA5546 / 47 Oscillation Frequency (FOSC) changing rate 100 150 -50 Oscillation Frequency (Fosc) changing rate 0.2 0.1 0 -0.1 -0 -64 -66 ...
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... Tj (℃) OLP detection voltage (VthOLP) vs. Junction temperature (Tj) 3.2 3.1 3.0 2.9 2.8 2.7 2.6 2.5 2.4 - (℃) AN-027E Rev.0.3 December -2008 FA5546 / 47 Output shutdown threshold voltage (VthFB0) vs. Junction temperature 0.44 0.42 0.40 0.38 0.36 100 150 -50 FB pin source current (Ifb0) vs. Junction temperature (Tj) -220 -230 -240 -250 -260 -270 -280 100 ...
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... Tj (℃) Output voltage high level (VOH) vs. Junction tmperature (Tj - (℃) AN-027E Rev.0.3 December -2008 FA5546 / 47 UVLO release threshold voltage (VCCon) vs. Junction temperature (Tj) 19.0 18.5 18.0 17.5 17.0 100 150 -50 Overvoltage threshold voltage (VthOVP) vs. Junction tmperature (Tj 100 150 ...
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... Latch power supply current (ICClat) vs. Junction temperature (Tj) 1100 1000 900 800 700 600 - (℃) AN-027E Rev.0.3 December -2008 FA5546 / 47 VCC pin capacitance charge current (Ipre2) vs. Junction temperature (Tj) -3 VH=120V -4 VCC= 100 150 -50 Operational power supply current (ICCop2) vs ...
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... ON/OFF control of the startup circuit. If the overload or overvoltage AN-027E Rev.0.3 December -2008 FA5546 / 47 protection is actuated, causing the IC to enter the latch mode, the one time clamp circuit discharges the VCC voltage immediately down to 14.5V (typ). This function interrupts the AC input voltage and shortens the latch mode reset (by the UVLO reset function) time ...
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... VthIS1, is -0.95V, the output of the reverse amplifier is given precedence and thus the current comparator is reversed when the IS terminal voltage reaches -0.5V.) AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig.4 Oscillation frequency Fig.5 Current mode basic operation circuit block Fig.6 Current mode basic operation timing chart 15 Fuji Electric Device Technology ...
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... This comparator reverses its output when the FB terminal voltage decreases down to 400mV (typ), preventing a set pulse to be input to the PWM latch (F.F.). The output is thus maintained in Low state and switching is stopped. AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig.7 Current comparator Minimum ON width 1shot output (set pulse) ...
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... When switching is stopped, the OLP timer counts the auto reset wait time TdOLP2 (1400ms typ). The startup circuit is kept under the ON/OFF control while AN-027E Rev.0.3 December -2008 FA5546 / 47 switching is suspended, and the VCC voltage is kept within ) auto restart type the 15.5V to 18V (typ) range. ...
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... Fig. 13 Typical overload/light load repetition timing chart AN-027E Rev.0.3 December -2008 FA5546 / 47 Example: In the case of a load with which overload current period of 50ms and no-load period of 1s are repeated, overload protection occurs within the overload delay time (200ms or shorter) as shown in Fig.13. Pay attention to the above in the case of a load with which overload and light load are repeated ...
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... Fig. 15 Overload protection timing chart (timer latch type) AN-027E Rev.0.3 December -2008 FA5546 / 47 latch shutdown Fig.14 Overload protection circuit (timer latch) 19 Fuji Electric Device Technology ...
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... Connect an NTC thermistor to the LAT terminal to use the overheat protective function. (See Fig.17) AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig. 17 Overheat protection function using a thermistor (9) Overvoltage protection circuit (VCC terminal) The IC integrates an overvoltage protection circuit for monitoring the VCC terminal voltage ...
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... While switching operation is suspended by the brown out function, the startup circuit is subjected to ON/OFF control to maintain the VCC voltage within the 15.5V to 18V (typ) range. AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig. 19 Brown in and brown out detection circuit Brown IN Diod brige Half wave Secondary ...
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... VCC voltage to decrease down to the OFF threshold voltage on occurrence of short circuit of the load of the power circuit. AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig. 21 VCC terminal circuit Fig. 22 VCC terminal voltage at startup voltages, and Fig. 23 VCC terminal voltage at startup (when ...
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... LAT terminal voltage to be kept below 1.0V. Fig.28 shows a typical circuit connection. AN-027E Rev.0.3 December -2008 FA5546 / 47 Fig. 28 Latch shutdown function by an external signal (5) Feedback Fig.29 shows the circuit configuration of the FB terminal. A photo-coupler PC is connected as a feedback circuit that monitors the output voltage and performs PWM control ...
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... By connecting R8 and C7 in series and connecting them between IS-OUT terminals as shown in Fig.33, the Rs resistance can be set small, allowing the loss to be minimized. Example 4.7kΩ 100pF AN-027E Rev.0.3 December -2008 FA5546 / Fig terminal filter Fig. 31 Noise malfunction prevention (VCC terminal) Fig ...
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... AN-027E Rev.0.3 December -2008 FA5546 / 47 (11) Loss calculation To use the IC within its ratings, the loss of the IC may have to be found. However not feasible to measure loss directly. The following is an example of finding a rough value of loss by calculation ...
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... C31 capacitor 1500pF C32,33,34,35 capacitor 470uF Note) This application circuit example shows typical directions for use of this IC for reference and does not guarantee the operation and characteristics. AN-027E Rev.0.3 December -2008 FA5546 / 47 Qty Component Ｉｔｅｍ 1 R1,2 resistor 1 R3 resistor ...
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... Board Typical characteristic curves(FA5546/47) Input Power at NO-Load 0.30 0.25 0.20 0.15 0.10 0.05 0.00 50 100 150 200 Input Voltage[Vac] Efficiency vs. Output Power 92 115Vac Efficiency >= 87%(AVE Output Power[%] Output Voltage (Iout=3.6A 100 150 200 Input Voltage[Vac] AN-027E Rev.0.3 December -2008 ...