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    产品型号78253/35MC的Datasheet PDF文件预览

    78253 Series  
    s
    MAX253 Compatible Converter Transformers  
    SELECTION GUIDE  
    Output  
    Voltage  
    Max. Output  
    Current  
    Isolation  
    Voltage  
    Input Voltage  
    Turns  
    Ratio  
    Package  
    Style  
    Order Code  
    V
    V
    mA  
    VDC  
    78253/35C  
    78253/35MC  
    78253/55C  
    78253/55MC  
    78253/35VC  
    78253/35MVC  
    78253/55VC  
    78253/55MVC  
    DIL  
    SM  
    DIL  
    SM  
    DIL  
    SM  
    DIL  
    SM  
    3.3  
    5.0  
    100  
    1500  
    1:2.27  
    1:1.31  
    1:2.14  
    1:1.33  
    5.0  
    3.3  
    5.0  
    5.0  
    5.0  
    5.0  
    200  
    100  
    200  
    1500  
    4000  
    4000  
    FEATURES  
    nRoHS compliant  
    nMaxim MAX253 compatible  
    n3.3V and 5V versions  
    nIsolation to 4kVDC  
    ORDER CODE DETAILS  
    Order Code  
    Package Type  
    Packaging Type  
    Quantity  
    78253/XXC  
    78253/XXMC  
    78253/XXMC-R  
    6 Pin DIL  
    6 Pin SM  
    6 Pin SM  
    Tube  
    Tube  
    50  
    50  
    nFrequency range to 500kHZ  
    nToroidal construction  
    nIndustry-standard pinout  
    nUL 94 V-0 package materials  
    nFully encapsulated  
    Tape & Reel  
    500  
    78253/35(M)C CHARACTERISTICS  
    Parameter  
    Conditions  
    Min.  
    0.30  
    1.60  
    Typ.  
    0.38  
    2.00  
    0.30  
    30  
    Max.  
    0.46  
    2.40  
    1.00  
    50  
    Units  
    mH  
    mH  
    μH  
    Primary Inductance, LP  
    Secondary Inductance, LS  
    Leakage Inductance, LL  
    Interwinding Capacitance, CWW  
    Primary D.C. Resistance, RDC  
    Volt-time Product, Et  
    100kHz, 250mV  
    100kHz, 250mV  
    100kHz, 250mV  
    100kHz, 250mV  
    >0.1VDC  
    pF  
    nLow profile  
    0.40  
    35  
    1.00  
    Ω
    Vμs  
    nSurface mount option  
    nIndustrial temperature range  
    Pins 1/2 or 2/3  
    30  
    78253/55(M)C CHARACTERISTICS  
    Parameter  
    Conditions  
    Min.  
    0.60  
    1.10  
    Typ.  
    0.83  
    1.40  
    0.35  
    30  
    Max.  
    1.10  
    1.70  
    1.00  
    50  
    Units  
    mH  
    mH  
    μH  
    Primary Inductance, LP  
    Secondary Inductance, LS  
    Leakage Inductance, LL  
    Interwinding Capacitance, CWW  
    Primary D.C. Resistance, RDC  
    Volt-time Product, Et  
    100kHz, 250mV  
    100kHz, 250mV  
    100kHz, 250mV  
    100kHz, 250mV  
    >0.1VDC  
    DESCRIPTION  
    The 78253 series of converter transformers are  
    specifically designed for use with the MAX253  
    chip set to provide isolated power supplies. The  
    5V version can supply 1W and the 3.3V version  
    can supply 500mW. A centre tapped secondary  
    winding allows for full bridge, half bridge or  
    voltage doubling.  
    pF  
    0.70  
    50  
    1.50  
    Ω
    Vμs  
    Pins 1/2 or 2/3  
    40  
    78253/35(M)VC CHARACTERISTICS  
    Parameter  
    Conditions  
    Min.  
    110  
    550  
    Typ.  
    142  
    710  
    3.00  
    4.20  
    0.30  
    22  
    Max.  
    185  
    Units  
    μH  
    Primary Inductance, LP  
    Secondary Inductance, LS  
    Leakage Inductance, LL  
    Interwinding Capacitance, CWW  
    Primary D.C. Resistance, RDC  
    Volt-time Product, Et  
    100kHz, 20mV  
    100kHz, 20mV  
    100kHz, 250mV  
    100kHz, 250mV  
    >0.1VDC  
    850  
    μH  
    Surface-mount parts  
    5.00  
    8.00  
    0.50  
    μH  
    pF  
    The surface-mount (M suffix) products are not  
    recommended for new designs. For existing designs,  
    however, Murata Power Solutions will continue to  
    manufacture and fully support these parts.  
    Ω
    Vμs  
    Pins 1/2 or 2/3  
    18  
    78253/55(M)VC CHARACTERISTICS  
    For recommended alternatives please refer to the  
    78253J Series datasheet.  
    Parameter  
    Conditions  
    Min.  
    190  
    350  
    Typ.  
    240  
    444  
    5.20  
    4.20  
    0.40  
    28  
    Max.  
    310  
    Units  
    μH  
    Primary Inductance, LP  
    Secondary Inductance, LS  
    Leakage Inductance, LL  
    Interwinding Capacitance, CWW  
    Primary D.C. Resistance, RDC  
    Volt-time Product, Et  
    100kHz, 20mV  
    100kHz, 20mV  
    100kHz, 250mV  
    100kHz, 250mV  
    >0.1VDC  
    540  
    μH  
    8.00  
    8.00  
    0.60  
    μH  
    pF  
    Ω
    Vμs  
    Pins 1/2 or 2/3  
    25  
    All specifications typical at TA=25°C  
    For full details go to  
    www.murata-ps.com/rohs  
    www.murata-ps.com/support  
    KMP_78253C_D04 Page 1 of 5  
    78253 Series  
    MAX253 Compatible Converter Transformers  
    ABSOLUTE MAXIMUM RATINGS  
    -40°C to 85°C  
    -50°C to 125°C  
    300°C  
    Operating free air temperature range  
    Storage temperature range  
    Lead Temperature 1.5mm from case for 10 seconds  
    Peak current IPK  
    400mA  
    1500VDC  
    Isolation voltage 78253/XX(M)C (flash tested for 1 second)  
    Isolation voltage 78253/XX(M)VC (flash tested for 1 second)  
    4000VDC  
    PACKAGE SPECIFICATIONS  
    MECHANICAL DIMENSIONS  
    6 Pin DIL  
    6 Pin SM  
    0.5  
    (1ꢀ.70ꢁ  
    0.375  
    0.375  
    (9.5ꢀꢁ MAX  
    (9.5ꢀꢁ MAX  
    Top View  
    Top View  
    Primary  
    Secondary  
    Primary  
    Secondary  
    1
    2
    3
    6
    1
    2
    3
    6
    0.354  
    (9.0ꢁ MAX  
    0.354  
    (9.0ꢁ MAX  
    5
    4
    5
    4
    78253/35C  
    XYYWW  
    78253/55MC  
    XYYWW  
    0.ꢀ5  
    (6.35ꢁ  
    0.ꢀ5  
    (6.35ꢁ  
    0.135 0.0ꢀ  
    (3.44 0.50ꢁ  
    0.01ꢀ 0.30  
    (0.008 0.ꢀ0ꢁ  
    0.0ꢀ5 (0.63ꢁ  
    0.0ꢀ1 (0.53ꢁ  
    0.035  
    (0.90ꢁ  
    0.1  
    (ꢀ.54ꢁ  
    0.01ꢀ(0.30ꢁ  
    0.008(0.ꢀ0ꢁ  
    0.0ꢀ5 (0.63ꢁ  
    0.0ꢀ1 (0.53ꢁ  
    0.40  
    (10.16ꢁ  
    0.1 (ꢀ.54ꢁ  
    Unless otherwise stated all dimensions in inches (mm) 0.01 (0.25).  
    All pins on a 0.1 (2.54) pitch and within 0.01 (0.25) of true position.  
    Package weight 1.0g Typ.  
    RECOMMENDED FOOTPRINT DETAILS  
    6 Pin DIL  
    6 Pin SM  
    0.10 (2.54)  
    0.06 (1.60)  
    0.10 (2.54)  
    0.10 (2.54)  
    +0.006 (0.15)  
    -0.000 (0.00)  
    Ø0.05 (1.20)  
    0.04  
    (1.00)  
    0.45  
    (11.50)  
    Unless otherwise stated all dimensions in inches (mm) 0.01 (0.25).  
    All pins on a 0.1 (2.54) pitch and within 0.01 (0.25) of true position.  
    www.murata-ps.com/support  
    KMP_78253C_D04 Page 2 of 5  
    78253 Series  
    MAX253 Compatible Converter Transformers  
    TYPICAL CHARACTERISTICS (VOLTAGE CURVES)  
    VOLTAGE CURVES  
    10  
    78253/35(M)C  
    78253/55(M)C  
    10  
    8
    6
    4
    8
    6
    4
    2
    0
    2
    0
    80  
    300  
    400  
    20  
    40  
    60  
    100 120  
    0
    100  
    200  
    0
    Output Current (mA)  
    Output Current (mA)  
    78253/35(M)VC  
    78253/55(M)VC  
    10  
    10  
    8
    8
    6
    4
    6
    4
    2
    0
    2
    0
    80  
    20  
    40  
    60  
    100  
    0
    100  
    200  
    300  
    400  
    0
    Output Current (mA)  
    Output Current (mA)  
    EFFICIENCY CURVES  
    78253/35(M)C  
    78253/55(M)C  
    100  
    80  
    100  
    80  
    60  
    40  
    60  
    40  
    20  
    0
    20  
    0
    0
    100  
    200  
    120  
    300  
    80 100  
    400  
    20  
    40  
    60  
    0
    Output Current (mA)  
    Output Current (mA)  
    78253/35(M)VC  
    78253/55(M)VC  
    100  
    80  
    100  
    80  
    60  
    40  
    60  
    40  
    20  
    0
    20  
    0
    100  
    0
    100  
    200  
    300  
    400  
    80  
    20  
    40  
    60  
    0
    Output Current (mA)  
    Output Current (mA)  
    All curves are derived from testing with the Maxim MAX235 IC using the circuit shown in application note MPAN-03 ( download at http://www.murata-ps.com/data/apnotes/mpan-03.pdf).  
    www.murata-ps.com/support  
    KMP_78253C_D04 Page 3 of 5  
    78253 Series  
    MAX253 Compatible Converter Transformers  
    TYPICAL CHARACTERISTICS (VOLTAGE CURVES) continued  
    VOLTAGE DEVIATION  
    78253/55(M)C  
    78253/35(M)C  
    110  
    105  
    110  
    105  
    100  
    95  
    100  
    95  
    90  
    90  
    100  
    50  
    -50 -25  
    0
    75  
    100  
    25  
    50  
    -50 -25  
    0
    75  
    25  
    Temperature (°C)  
    Temperature (°C)  
    78253/35(M)VC  
    78253/55(M)VC  
    110  
    110  
    105  
    105  
    100  
    95  
    100  
    95  
    90  
    90  
    100  
    50  
    Temperature (°C)  
    -50 -25  
    0
    75  
    25  
    25  
    Temperature (°C)  
    100  
    50  
    -50 -25  
    0
    75  
    SOLDERING INFORMATION1  
    Pin finish  
    TECHNICAL NOTES  
    ISOLATION VOLTAGE  
    Matte tin  
    REPEATED HIGH-VOLTAGE  
    ISOLATION TESTING  
    ‘Hi Pot Test’, ‘Flash Tested’, ‘Withstand Volt-  
    age’, ‘Proof Voltage’, ‘Dielectric Withstand  
    Voltage’ & ‘Isolation Test Voltage’ are all terms  
    that relate to the same thing, a test voltage,  
    applied for a specified time, across a compo-  
    nent designed to provide electrical isolation, to  
    verify the integrity of that isolation.  
    300˚C for 10 seconds  
    220˚C2  
    Peak wave solder temperature  
    Peak reflow temperature  
    It is well known that repeated high-voltage  
    isolation testing of a barrier component can  
    actually degrade isolation capability, to a  
    lesser or greater degree depending on ma-  
    terials, construction and environment. This  
    series has toroidal isolation transformers,  
    with no additional insulation between pri-  
    mary and secondary windings of enameled  
    wire. While parts can be expected to with-  
    stand several times the stated test voltage,  
    the isolation capability does depend on the  
    wire insulation. Any material, including this  
    enamel (typically polyurethane) is suscep-  
    tible to eventual chemical degradation when  
    subject to very high applied voltages thus  
    implying that the number of tests should be  
    strictly limited. We therefore strongly advise  
    against repeated high voltage isolation test-  
    ing, but if it is absolutely required, that the  
    voltage be reduced by 20% from specified  
    test voltage.  
    TUBE OUTLINE DIMENSIONS  
    0.43  
    (10.95)  
    All products in this series are 100% production  
    tested at their stated isolation voltage.  
    0.16 (4.00)  
    A question commonly asked is, “What is the  
    continuous voltage that can be applied across  
    the part in normal operation?”  
    0.023 0.005  
    (0.60 0.15)  
    0.51  
    (12.95)  
    For a part holding no specific agency approv-  
    als both input and output should normally be  
    maintained within SELV limits i.e. less than  
    42.4V peak, or 60VDC. The isolation test  
    voltage represents a measure of immunity to  
    transient voltages and the part should never  
    be used as an element of a safety isolation  
    system. The part could be expected to function  
    correctly with several hundred volts offset  
    applied continuously across the isolation bar-  
    rier; but then the circuitry on both sides of the  
    barrier must be regarded as operating at an  
    unsafe voltage and further isolation/insulation  
    systems must form a barrier between these  
    circuits and any user-accessible circuitry ac-  
    cording to safety standard requirements.  
    0.22 (5.50)  
    0.15  
    (3.80)  
    0.62 (15.70)  
    Tube length: 18.3 0.08 (465 2). Tube quantity: 50.  
    Tube material: Antistatic coated clear pvc.  
    Unless otherwise stated all dimensions in inches(mm) 0.01 (0.25).  
    This consideration equally applies to agency  
    recognized parts rated for better than  
    functional isolation where the wire enamel  
    insulation is always supplemented by a  
    further insulation system of physical spacing  
    or barriers.  
    All specifications typical at TA=25°C  
    For further information, please visit www.murata-ps.com/rohs  
    For high temperature reflow parts see 78253J series.  
    1
    2
    www.murata-ps.com/support  
    KMP_78253C_D04 Page 4 of 5  
    78253 Series  
    MAX253 Compatible Converter Transformers  
    TAPE & REEL SPECIFICATIONS  
    REEL OUTLINE DIMENSIONS  
    *
    2.36 (60) Min.  
    Ø
    Ø15.039 (382) Max.  
    0.94-1.08 (23.9-27.4)  
    0.53 (13.50)  
    0.50 (12.80)  
    Leader section  
    15.7 (400) Min.  
    3.9 (100)  
    Min.  
    0.059 (1.50)  
    Min.  
    1.20  
    (30.4) Max.  
    Goods  
    enclosure  
    section  
    0.96 (24.4)  
    1.04 (26.4)  
    Trailer section  
    6.3 (160) Min.  
    Reel quantity: 500  
    Unless otherwise stated all  
    dimensions in inches (mm) 0.01(0.25).  
    Ø0.80 (20.20) Min.  
    *
    Includes flange distortion at outer edge.  
    Measured at hub.  
    TAPE OUTLINE DIMENSIONS  
    +0.004  
    -0.000  
    +0.10  
    )
    -0.00  
    0.069 (1.75)  
    0.157 (4.00)  
    0.079 (2.00)  
    0.059  
    (1.50  
    Cover tape  
    0.283 (7.20)  
    0.472 (12.00)  
    0.369 (9.37)  
    0.024 (0.60) Max.  
    Direction of unreeling  
    Unless otherwise stated all  
    dimensions in inches (mm) 0.01(0.25).  
    Murata Power Solutions, Inc.  
    11 Cabot Boulevard, Mansfield, MA 02048-1151 U.S.A.  
    ISO 9001 and 14001 REGISTERED  
    Murata Power Solutions, Inc. makes no representation that the use of its products in the circuits described herein, or the use of other  
    technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply  
    the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without  
    notice.  
    © 2011 Murata Power Solutions, Inc.  
    www.murata-ps.com/support  
    KMP_78253C_D04 Page 5 of 5  
    配单直通车
    78253/35MC产品参数
    型号:78253/35MC
    是否Rohs认证： 符合
    生命周期：Transferred
    包装说明：ROHS COMPLIANT
    Reach Compliance Code：unknown
    ECCN代码：EAR99
    风险等级：5.36
    应用：GENERAL PURPOSE
    ET产品最小值：35 V-us
    高度：6.35 mm
    绝缘电压：1500 V
    JESD-609代码：e3
    长度：9.52 mm
    制造商序列号：78253
    安装特点：SURFACE MOUNT
    功能数量：1
    最高工作温度：85 °C
    最低工作温度：-40 °C
    物理尺寸：9.52mm X 8.89mm X 6.35mm
    初级电感：380 µH
    表面贴装：YES
    端子面层：Tin (Sn)
    变压器类型：PULSE TRANSFORMER
    匝数比 (Np:Ns)：1:2.27
    宽度：8.89 mm
    Base Number Matches：1
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