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| GSAI Series SAI Series Surface-Mount, Separate Excitation Switching Type IFeatures * * * * * * * Surface-mount package Output current: 0.4 to 0.5A High efficiency: 75 to 89% Requires only 4 external components Phase correction and output voltage adjustment performed internally Built-in reference oscillator (60kHz) Built-in overcurrent and thermal protection circuits IApplications * Power supplies for telecommunication equipment * Onboard local power supplies ILineup Part Number VO(V) IO(A) SAI01 5.0 0.5 SAI02 3.3 SAI03 12.0 SAI04 15.0 0.4 SAI06 9.0 IAbsolute Maximum Ratings Parameter DC Input Voltage Power Dissipation Junction Temperature Storage Temperature SW Terminal Applied Reverse Voltage Thermal Resistance(junction to case) Symbol VIN PD Tj Tstg VSW Rth(j-c) Ratings 35 0.75 +125 -40 to +125 -1 20 Unit V W C C V C/W IRecommended Operating Conditions Parameter DC Input Voltage Range Output Current Range Operating Junction Temperature Range Symbol SAI01 VIN IO Tjop 7 to 33 SAI02 5.3 to 28 Ratings SAI03 15 to 33 -30 to +125 SAI04 18 to 33 0 to 0.4 SAI06 12 to 33 Unit V A C 0 to 0.5 64 GSAI Series IElectrical Characteristics Ratings Parameter Symbol min. Output Voltage Efficiency Switching Frequency Line Regulation Load Regulation Temperature Coefficient of Output Voltage Ripple Rejection Overcurrent Protection Starting Current VO Conditions Conditions f Conditions VOLINE VOLOAD Conditions VO/Ta RREJ Conditions IS1 Conditions 0.55 VIN=10V 4.80 SAI01 typ. max. min. 5.00 80 VIN=20V, IO=0.3A 60 VIN=20V, IO=0.3A 80 30 0.5 45 f=100 to 120HZ 0.55 VIN=8V 100 40 5.20 3.17 SAI02 typ. max. min. 3.30 75 VIN=15V, IO=0.3A 60 VIN=15V, IO=0.3A 60 20 0.5 45 f=100 to 120HZ 0.45 VIN=18V 80 30 VIN=8 to 28V, IO=0.3A VIN=15V, IO=0.1 to 0.4A 3.43 SAI03 typ. max. min. SAI04 typ. max. min. 8.55 SAI06 (Ta=25C) Unit 9.45 typ. max. 9.00 86 V % kHZ 110 80 mV mV mV/C dB A VIN=15V 11.40 12.00 12.60 14.25 15.00 15.75 VIN=24V, IO=0.3A 88 VIN=24V, IO=0.3A 60 VIN=24V, IO=0.3A 100 70 1.5 45 f=100 to 120HZ 0.45 VIN=21V 130 95 VIN=27V, IO=0.3A 89 VIN=27V, IO=0.3A 60 VIN=27V, IO=0.3A 100 90 1.5 45 f=100 to 120HZ 130 120 VIN=20V, IO=0.3A VIN=15V, IO=0.3A VIN=21V, IO=0.3A VIN=21V, IO=0.3A 60 VIN=21V, IO=0.3A 90 50 1.0 45 f=100 to 120HZ 0.45 Conditions VIN=10 to 30V, IO=0.3A VIN=20V, IO=0.1 to 0.4A VIN=18 to 30V, IO=0.3A VIN=21 to 30V, IO=0.3A VIN=15 to 30V, IO=0.3A VIN=24V, IO=0.1 to 0.4A VIN=27V, IO=0.1 to 0.4A VIN=21V, IO=0.1 to 0.4A IExternal Dimensions 3VOS 4 .GND 0.75 -0.05 +0.15 (unit: mm) 2 SW max. 0.2 0.25 1VIN 0.15 4.7 a b 1.4 6.8 max. 0.2 a. Part Number b. Lot Number A Case temperature measuring point Pin Arrangement q VIN w SWOUT e VOS r GND Plastic Mold Package Type Flammability: UL94V-0 Weight: Approx. 0.22g 0.89 2.54 4.32 3.6 0.2 max. A 8.0 6.3 0.5 0.2 4.0 0~0.15 1.0 0.3 3.0 9.8 0.2 0.3 0.3 -0.05 0.25 +0.15 IBlock Diagram IStandard External Circuit VIN 1 OCP Reg. OSC 2 SWOUT 1 L1 2 3 3.3V 5V : 200H 9V 12V 15V : 300H VO VIN Reset Drive TSD C1 100F Amp. VREF 3 VOS GND VIN SWOUT SAI + GND 4 VOS D1 SFPB54 (Sanken) + Comp. C2 330F GND 4 GND 65 GSAI Series IExample of Printed Circuit Board VIN SW 2 L1 DI1 SAI 3 + 1 + C1 4 C2 VO GND a) For optimum operation, there must be only one GND line originating from terminal 4 and each component must be connected with the shortest possible wiring. b) To prevent heating of the IC, it is best to make the GND pattern as large as possible since the internal frame and terminal 4 (GND) are connected to each other. ITa-PD Characteristics 0.8 0.7 Power Dissipation PD (W) 0.6 0.5 0.4 0.3 0.2 0.1 0 -30 0 25 50 * Glass epoxy substrate (95x69x1.2) * No airflow PD=VO*IO 100 -1 -VF*IO 1- VO VIN The efficiency depends on the input voltage and the output current. Thus, obtain the value from the efficiency graph on page 67 and substitute the percentage in the formula above. VO:Output voltage IO :Output current x :Efficiency (%) VF :Diode forward voltage SFPB54-0.3V Thermal design for D1 must be considered separately. 75 100 125 Ambient Temperature Ta (C) ISelecting External Components 1. Inductor L1 1) It must be suited for switching regulators. Do not use inductors such as noise filters, because they generate excessive heat. 2) It must have the appropriate inductance value. If the inductance is too small (150H or lower), abnormal oscillation may occur causing operation problems in the overcurrent protection circuit within the rated current range. 3) The rated current must be satisfied. If the rated current is exceeded, magnetic saturation leads to overcurrent. 2. Capacitors C1 and C2 1) They must satisfy the breakdown voltage and allowable ripple current. Exceeding the ratings of these capacitors or using them without derating shortens their service lives and may also cause abnormal oscillation of the IC. 2) C2 should be a low-impedance type capacitor. A low-impedance type capacitor is recommended for C2 to ensure reduced ripple voltage and stable switching operation. 3. Diode D1 The Sanken SFPB54 diode is recommended for D1. If you intended to use an equivalent diode, be sure to use a Schottky Barrier diode and make sure that the reverse voltage applied to terminal 2 of the IC does not exceed the value (-1V) given in the absolute maximum ratings. If you use a fast recovery diode or any other diode, supplying a reverse voltage generated from the recovery or ON voltage of the diode may damage the IC. Application Variable output voltage Output voltage can be adjusted in the same way as SI-8000S in page 77. 66 GSAI Series ITypical Characteristics Output Voltage(SAI01) 6 0.1A 5 Ta=25C Efficiency Characteristics(SAI01) 100 90 80 VIN 10 V = Load Regulation(SAI01) 5.3 5.2 Ta=25C Ta=25C Output Voltage VO (V) Output Voltage VO (V) 7V IO = 0A 5.1 VIN=33V 5.0 4.9 4.8 4.7 0 0 10V 7V 0.5 A 4 Efficiency (%) 20V 70 60 50 40 0 0 3 2 1 0 0 25V 33V 0.1 20V 2 4 6 8 10 0.2 0.3 0.4 0.5 0.1 0.2 0.3 0.4 0.5 Input Voltage VIN (V) Output Current IO (A) Output Current IO (A) Temperature Characteristics(SAI01) 100 VIN=20V, IO=0.3A 5.3 5.2 Overcurrent Protection Characteristics(SAI01) 6 Ta=25C Thermal Protection Characteristics(SAI01) 6 VIN=20V, IO=20mA Efficiency (%) Frequency f (kHz) 90 80 70 60 50 40 0 -50 VO 5 5 Output Voltage VO (V) Output Voltage VO (V) 5.1 5.0 4.9 4.8 4.7 0 150 4 =7 V 20V Output Voltage VO (V) 4 V f 33 3 VIN 3 2 2 1 1 0 0 0 50 100 00 0.5 1.0 1.5 2.0 50 100 150 200 Ambient Temperature Ta (C) Output Current IO (A) Case Temperature TC (C) Note on Thermal Protection: The thermal protection circuit is intended for protection against heat during instantaneous short-circuiting. Its operation is not guaranteed for continuous heating condition such as short-circuiting over extended periods of time. Output Voltage(SAI03) 14 12 Ta=25C Efficiency Characteristics(SAI03) 100 90 Ta=25C Load Regulation(SAI03) 12.3 Ta=25C 0A 4A Output Voltage VO (V) 10 8 6 4 2 0 0 80 Efficiency (%) V V 24 IN 0.2A 33 V Output Voltage VO (V) IO= 0. =1 5V 12.2 12.1 70 60 50 40 0 VIN=33V 24V 20V 12.0 15V 11.9 11.8 0 0 5 10 15 20 0 0.1 0.2 0.3 0.4 0.1 0.2 0.3 0.4 Input Voltage VIN (V) Output Current IO (A) Output Current IO (A) 67 |
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