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| qSAI Series SAI Series Surface-Mount, Separate Excitation Switching Type sFeatures * * * * * * * 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 sApplications * Power supplies for telecommunication equipment * Onboard local power supplies sLineup 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 sAbsolute 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 sRecommended 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 72 qSAI Series sElectrical 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 sOutline Drawing 3VOS 4 .GND 2 SW max. (unit: mm) 0.25 4.32 0.2 1VIN 0.15 4.7 a b 0.75 -0.05 +0.15 1.4 6.8 max. 0.2 a. Part Number b. Lot Number A Case temperature measuring point q w e r VIN SWOUT VOS GND 0.89 2.54 3.6 0.2 A 8.0 0.5 0.2 4.0 max. 6.3 0.3 -0.05 0.25 +0.15 0~0.15 1.0 0.3 3.0 9.8 0.2 0.3 Plastic Mold Package Type Flammability: UL94V-0 Weight: Approx. 0.22g sBlock Diagram sStandard 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 73 qSAI Series sExample 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. sTa-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) * Natural cooling 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 75 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) sSelecting External Components 1. Inductor L1 1) It must be suited for switching regulators. Do not use inductors as noise filters as 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 withstand 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 must be a low-impedance type capacitor. A low-impedance type capacitor is recommended for C2 to ensure minimum 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, application of 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 85. 74 qSAI Series sTypical Characteristics Rise Characteristics(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 50 100 00 0.5 1.0 1.5 2.0 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 shortcircuiting. Its operation is not guaranteed for shortcircuiting over extended periods of time. Rise Characteristics(SAI03) 14 12 Ta=25C Efficiency Characteristics(SAI03) 100 90 Ta=25C Load Regulation(SAI03) 12.3 Ta=25C 0. 4A 0A Output Voltage VO (V) 10 8 6 4 2 0 0 80 Efficiency (%) V 24 V IN 0.2A 33 V Output Voltage VO (V) IO= =1 5V 12.2 12.1 70 60 50 40 0 VIN=33V 24V 20V 15V 12.0 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) 75 |
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