SAI01资料

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Surface-mount packageOutput current: 0.4 to 0.5AHigh efficiency: 75 to 89%

Requires only 4 external components

Phase correction and output voltage adjustment performed internallyBuilt-in reference oscillator (60kHz)

Built-in overcurrent and thermal protection circuits

sApplications

•Power supplies for telecommunication equipment•Onboard local power supplies

sLineup

Part NumberVO(V)IO(A)SAI015.00.5SAI023.3SAI0312.0SAI0415.00.4SAI069.0sAbsolute Maximum RatingsParameterDC Input VoltagePower DissipationJunction TemperatureStorage TemperatureSW Terminal Applied Reverse VoltageThermal Resistance(junction to case)SymbolVINPDTjTstgVSWRth(j-c)Ratings350.75+125–40 to +125–120UnitVW°C°CV°C/WsRecommended Operating Conditions

ParameterDC Input Voltage RangeOutput Current RangeOperating Junction Temperature RangeSymbolVINIOTjopRatingsSAI017 to 33SAI025.3 to 28SAI0315 to 33–30 to +125SAI0418 to 330 to 0.4SAI0612 to 33UnitVA°C0 to 0.572

元器件交易网www.cecb2b.comqSAI SeriessElectrical Characteristics

RatingsParameterSymbolmin.Output VoltageEfficiencySwitching FrequencyLine RegulationLoad RegulationTemperature Coefficient of Output VoltageRipple RejectionOvercurrent ProtectionStarting CurrentVO Conditionsη Conditionsf Conditions∆VOLINE∆VOLOAD Conditions∆VO/∆TaRREJ ConditionsIS1 Conditions0.55VIN=10V4.80SAI01typ.max.min.5.0080VIN=20V, IO=0.3A60VIN=20V, IO=0.3A8030±0.545f=100 to 120HZ0.55VIN=8V100405.203.17SAI02typ.max.min.3.3075VIN=15V, IO=0.3A60VIN=15V, IO=0.3A6020±0.545f=100 to 120HZ0.45VIN=18V8030VIN=8 to 28V, IO=0.3AVIN=15V, IO=0.1 to 0.4A3.43SAI03typ.max.min.SAI04typ.max.min.8.55SAI06(Ta=25°C)Unit9.45typ.max.9.0086V%kHZmVmVmV/°CdBA11.4012.0012.6014.2515.0015.75VIN=24V, IO=0.3A88VIN=24V, IO=0.3A60VIN=24V, IO=0.3A10070±1.545f=100 to 120HZ0.45VIN=21V13095VIN=27V, IO=0.3A89VIN=27V, IO=0.3A60VIN=27V, IO=0.3A10090±1.545f=100 to 120HZ130120VIN=20V, IO=0.3AVIN=15V, IO=0.3AVIN=21V, IO=0.3AVIN=21V, IO=0.3A60VIN=21V, IO=0.3A9050±1.045f=100 to 120HZ0.45VIN=15V11080 ConditionsVIN=10 to 30V, IO=0.3AVIN=20V, IO=0.1 to 0.4AVIN=18 to 30V, IO=0.3AVIN=21 to 30V, IO=0.3AVIN=15 to 30V, IO=0.3AVIN=24V, IO=0.1 to 0.4AVIN=27V, IO=0.1 to 0.4AVIN=21V, IO=0.1 to 0.4AsOutline Drawing

3VOS4.GND2 SWmax.±0.2(unit: mm)

±0.252.541VIN±0.154.7ab0.75–0.05+0.151.46.8max.±0.2a. Part Numberb. Lot NumberA Case temperature measuring pointqwerVINSWOUTVOSGND0.894.323.6±0.2max.A8.0±0.5±0.24.06.30.3–0.050.25+0.150~0.151.0±0.33.09.8±0.2Plastic Mold Package TypeFlammability: UL94V-0Weight: Approx. 0.22g±0.3sBlock DiagramsStandard External Circuit

VIN1OCPReg.OSCResetDriveComp.TSD2SWOUT1L1233.3V 5V : 200µH9V 12V 15V : 300µHVOVINVINSWOUTSAIC1100µF+GND4VOSD1SFPB54(Sanken)+C2330µFAmp.VREF4GND3VOSGNDGND73

元器件交易网www.cecb2b.comqSAI SeriessExample of Printed Circuit Board

VINSW2L1DI1SAI3+1+C1a) For optimum operation, there must be onlyone GND line originating from terminal 4and each component must be connectedwith the shortest possible wiring.b) To prevent heating of the IC, it is best tomake the GND pattern as large as pos-sible since the internal frame and termi-nal 4 (GND) are connected to each other.4C2VOGNDsTa-PD Characteristics

0.80.7Power Dissipation PD (W)0.60.50.40.30.20.10–3002550• Glass epoxy substrate (95×69×1.2)• Natural cooling100 VOPD=VO•IO –1 –VF•IO 1– ηχ VINThe efficiency depends on the input voltage and the out-put current. Thus, obtain the value from the efficiencygraph on page 75 and substitute the percentage in theformula above.VO:Output voltageIO:Output currentηx:Efficiency (%)VF:Diode forward voltageSFPB54-0.3VThermal design for D1 must be considered separately.75100125Ambient 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 (150µH or lower), abnormal oscillation may occur causing operation problems in the overcurrent protectioncircuit 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 abnormaloscillation 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 andmake sure that the reverse voltage applied to terminal 2 of the IC does not exceed the value (–1V) given in the absolute maximum ratings. Ifyou use a fast recovery diode or any other diode, application of a reverse voltage generated from the recovery or ON voltage of the diode maydamage the IC.

Application

Variable output voltage

Output voltage can be adjusted in the same way as SI-8000S in page 85.

74

元器件交易网www.cecb2b.comqSAI SeriessTypical Characteristics

Rise Characteristics(SAI01)650.1ATa=25°CEfficiency Characteristics(SAI01)1009080 =INTa=25°CLoad Regulation(SAI01)5.35.2Ta=25°COutput Voltage VO (V)Output Voltage VO (V)7VEfficiency η (%)IO=A4321000AV10V5.1VIN=33V5.04.94.84.70010V7V20V0.5706050400025V33V0.120V2468100.20.30.40.50.10.20.30.40.5Input Voltage VIN (V)Output Current IO (A)Output Current IO (A)Temperature Characteristics(SAI01)100VIN=20V, IO=0.3A5.35.2Overcurrent Protection Characteristics(SAI01)65Ta=25°CThermal Protection Characteristics(SAI01)65VIN=20V, IO=20mAEfficiency η (%) Frequency f (kHz)90η80706050400–50VOOutput Voltage VO (V)Output Voltage VO (V)5.15.04.94.84.7 01504=7V20VOutput Voltage VO (V)432f2100VIN333V100501000.51.01.52.0050100150200Ambient Temperature Ta (°C)Output Current IO (A)Case Temperature TC (°C)Note on Thermal Protection:The thermal protection circuit is intended for pro-tection against heat during instantaneous short-circuiting. Its operation is not guaranteed for short-circuiting over extended periods of time.Rise Characteristics(SAI03)1412Ta=25°CEfficiency Characteristics(SAI03)10090Ta=25°CLoad Regulation(SAI03)12.312.2Ta=25°C4AOutput Voltage VO (V)1086420058070605040240.2AEfficiency η (%)V33Output Voltage VO (V)1N=VIV0A5VIO=0.12.112.011.9VIN=33V24V20V15V11.800101520000.10.20.30.40.10.20.30.4Input Voltage VIN (V)Output Current IO (A)Output Current IO (A)75