78253/55VC

78253 MURATA-PS | Alldatasheet

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KMP_78253C_F01 Page 1 of 7

78253 Series

MAX253 Compatible Converter Transformers www.murata.com For full details go to www.cd4power.com/rohsFor full details go to https://www.murata.com/en- global/products/power/rohs www.murata.com

FEATURES

n 3.3V and 5V versions n Isolation to 4kVDC n Frequency range to 500kHZ n Toroidal construction n Industry-standard pinout n UL 94 V-0 package materials n Fully encapsulated n Low profile n Surface mount option n Industrial temperature range

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. Surface-mount parts The surface-mount (M suffix) products are not recommended for new designs. For recommended alternatives please refer to the 78253J Series datasheet. SELECTION GUIDE Order Code Input Voltage Output Voltage Max. Output Current Isolation Voltage Turns Ratio Package Style Recommended Alternative V V mA VDC 78253/35C 3.3 5.0 100 1500 1:2.27 DIL 78253/55C 5.0 5.0 200 1500 1:1.31 DIL 78253/35VC 3.3 5.0 100 4000 1:2.14 DIL 78253/55VC 5.0 5.0 200 4000 1:1.33 DIL 78253/35MC 3.3 5.0 100 1500 1:2.27 SM 78253/3JC 78253/55MC 5.0 5.0 200 1500 1:1.31 SM 78253/55JC 78253/35MVC 3.3 5.0 100 4000 1:2.14 SM 78253/35JVC 78253/55MVC 5.0 5.0 200 4000 1:1.33 SM 78253/55JVC ORDER CODE DETAILS Order Code Package Type Packaging Type Quantity 78253/XX(V)C 6 Pin DIL Tube 50 78253/XXM(V)C 6 Pin SM Tube 50 78253/XXM(V)C-R 6 Pin SM Tape & Reel 500 78253/35(M)C CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Primary Inductance, LP 100kHz, 250mV 0.18 0.38 0.51 mH Secondary Inductance, LS 100kHz, 250mV 0.93 2.00 2.70 mH Leakage Inductance, LL 100kHz, 250mV 0.30 1.00 μH Interwinding Capacitance, CWW 100kHz, 250mV 30 50 pF Volt-time Product, Et Pins 1/2 or 2/3 30 35 Vμs 78253/55(M)C CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Primary Inductance, LP 100kHz, 250mV 0.60 0.83 1.50 mH Secondary Inductance, LS 100kHz, 250mV 1.10 1.40 2.50 mH Leakage Inductance, LL 100kHz, 250mV 0.35 1.30 μH Interwinding Capacitance, CWW 100kHz, 250mV 30 50 pF Volt-time Product, Et Pins 1/2 or 2/3 40 50 Vμs All specifications typical at TA=25°C

KMP_78253C_F01 Page 2 of 7 MAX253 Compatible Converter Transformers www.murata.com 78253/35(M)VC CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Primary Inductance, LP 100kHz, 20mV 110 142 185 μH Secondary Inductance, LS 100kHz, 20mV 550 710 850 μH Leakage Inductance, LL 100kHz, 250mV 3.00 5.00 μH Interwinding Capacitance, CWW 100kHz, 250mV 4.20 8.00 pF Volt-time Product, Et Pins 1/2 or 2/3 18 22 Vμs 78253/55(M)VC CHARACTERISTICS Parameter Conditions Min. Typ. Max. Units Primary Inductance, LP 100kHz, 20mV 190 240 310 μH Secondary Inductance, LS 100kHz, 20mV 350 444 540 μH Leakage Inductance, LL 100kHz, 250mV 5.20 8.00 μH Interwinding Capacitance, CWW 100kHz, 250mV 4.20 8.00 pF Volt-time Product, Et Pins 1/2 or 2/3 25 28 Vμs ABSOLUTE MAXIMUM RATINGS Operating free air temperature range -40°C to 85°C Storage temperature range -50°C to 125°C Lead Temperature 1.5mm from case for 10 seconds 300°C Peak current IPK 400mA Isolation voltage 78253/XX(M)C (flash tested for 1 second) 1500VDC Isolation voltage 78253/XX(M)VC (flash tested for 1 second) 4000VDC

KMP_78253C_F01 Page 3 of 7 MAX253 Compatible Converter Transformers www.murata.com PACKAGE SPECIFICATIONS MECHANICAL DIMENSIONS RECOMMENDED FOOTPRINT DETAILS

6 Pin DIL 6 Pin SM

0.135±0.02 (3.44±0.50) 0.25 (6.35) 0.354 (9.0) MAX 0.375 (9.52) MAX 0.012(0.30) 0.008(0.20) 0.40 (10.16) 0.1 (2.54) 0.025 (0.63) 0.021 (0.53) 0.354 (9.0) MAX 0.375 (9.52) MAX 0.5 (12.70) 0.025 (0.63) 0.021 (0.53)0.1 (2.54) 0.035 (0.90) 0.012 0.30 (0.008 0.20) 0.25 (6.35) 78253/55MC XYYWW 78253/35C XYYWW Primary Secondary Primary Secondary 1 0.10 (2.54) 0.10 (2.54) -0.000 (0.00) 0.45 (11.50) 0.10 (2.54) 0.04 (1.00) 0.06 (1.60) Unless otherwise stated all dimensions in inches (mm) ±0.01 (0.25). Package weight 1.0g Typ. 0.10 (2.54) 0.10 (2.54) -0.000 (0.00) 0.45 (11.50) 0.10 (2.54) 0.04 (1.00) 0.06 (1.60) Unless otherwise stated all dimensions in inches (mm) ±0.01 (0.25). Top ViewTop View

KMP_78253C_F01 Page 4 of 7 MAX253 Compatible Converter Transformers www.murata.com TYPICAL CHARACTERISTICS (VOLTAGE CURVES) VOLTAGE CURVES Output Voltage (V) Output Voltage (V) Output Current (mA) Output Current (mA) Output Voltage (V) Output Voltage (V) Output Current (mA) Output Current (mA) EFFICIENCY CURVES Efficiency (%) Efficiency (%) Output Current (mA) Output Current (mA) Efficiency (%) Efficiency (%) 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. 0 20 40 60 80 100 120 78253/35(M)C 400 78253/55(M)C10 0 100 200 300 78253/35(M)VC 0 20 40 60 100 78253/55(M)VC10 0 100 200 300 400 78253/35(M)C 100 0 20 40 60 12080 100 78253/55(M)C 100 0 0 200 400300100 78253/35(M)VC 0 20 40 60 10080 100 78253/55(M)VC 100 0 0 200 400300100

KMP_78253C_F01 Page 5 of 7 MAX253 Compatible Converter Transformers www.murata.com TYPICAL CHARACTERISTICS (VOLTAGE CURVES) (Continued) VOLTAGE DEVIATION Voltage Deviation from Nominal 25°C Output (%) Voltage Deviation from Nominal 25°C Output (%) Temperature (°C) Temperature (°C) Voltage Deviation from Nominal 25°C Output (%) Voltage Deviation from Nominal 25°C Output (%) Temperature (°C) Temperature (°C) 78253/35(M)C 110 105 100 -50 0 5025-25 75 100 78253/55(M)C 110 105 100 -50 0 5025-25 75 100 78253/35(M)VC 110 105 100 -50 0 5025-25 75 100 78253/55(M)VC 110 105 100 -50 0 5025-25 75 100 SOLDERING INFORMATION1 Pin finish Matte tin Peak wave solder temperature 300˚C for 10 seconds Peak reflow temperature 220˚C2 TUBE OUTLINE DIMENSIONS All specifications typical at TA=25°C 1 For further information, please visit www.murata.com/en-global/products/power/rohs 2 For high temperature reflow parts see 78253J series. 0.023±0.005 (0.60±0.15) 0.16 (4.00) 0.22 (5.50) 0.43 (10.95) 0.51 (12.95) 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). TECHNICAL NOTES ISOLATION VOLTAGE ‘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. All products in this series are 100% production tested at their stated isolation voltage. A question commonly asked is, “What is the continuous voltage that can be applied across the part in normal operation?” 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. REPEATED HIGH-VOLTAGE ISOLATION TESTING 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 enamelled 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. This consideration equally applies to agency recognised 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.

KMP_78253C_F01 Page 6 of 7 MAX253 Compatible Converter Transformers www.murata.com TAPE & REEL SPECIFICATIONS REEL OUTLINE DIMENSIONS TAPE OUTLINE DIMENSIONS 1.20 (30.4) Max. 0.53 (13.50) 0.50 (12.80) 0.059 (1.50) Min. 2.36 (60) Min. 0.80 (20.20) Min. 3.9 (100) Min. Leader section 15.7 (400) Min. Goods enclosure section Trailer section 6.3 (160) Min. Ø15.039 (382) Max. Ø Ø 0.96 (24.4) 1.04 (26.4) Reel quantity: 500 Unless otherwise stated all dimensions in inches (mm) ±0.01(0.25). * Includes flange distortion at outer edge.  Measured at hub. 0.024 (0.60) Max. 0.283 (7.20) 0.369 (9.37) Direction of unreeling 0.069 (1.75) 0.453 (11.50) 0.472 (12.00)Cover tape -0.000 +0.10 -0.00 0.945 (24.00 ) +0.012-0.004 +0.30-0.10 7825335MCXYYWW Unless otherwise stated all dimensions in inches (mm) ±0.01(0.25).

KMP_78253C_F01 Page 7 of 7 MAX253 Compatible Converter Transformers www.murata.com Murata Power Solutions (Milton Keynes) Ltd. 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. © 2023 Murata Power Solutions (Milton Keynes) Ltd This product is subject to the following operating requirements and the Life and Safety Critical Application Sales Policy: Refer to: https://www.murata.com/en-eu/products/power/requirements DISCLAIMER Unless otherwise stated in the datasheet, all products are designed for standard commercial and industrial applications and NOT for safety-critical and/or life-critical applications. Particularly for safety-critical and/or life-critical applications, i.e. applications that may directly endanger or cause the loss of life, inflict bodily harm and/or loss or severe damage to equipment/property, and severely harm the environment, a prior explicit written approval from Murata is strictly required. Any use of Murata standard prod- ucts for any safety-critical, life-critical or any related applications without any prior explicit written approval from Murata shall be deemed unauthorised use. These applications include but are not limited to:

• Aircraft equipment
• Aerospace equipment
• Undersea equipment
• Power plant control equipment
• Medical equipment
• Transportation equipment ( automobiles, trains, ships, etc.)
• Traffic signal equipment
• Disaster prevention / crime prevention equipment
• Data Processing equipment Murata makes no express or implied warranty, representation, or guarantee of suitability, fitness for any particular use/purpose and/or compatibility with any applica- tion or device of the buyer, nor does Murata assume any liability whatsoever arising out of unauthorised use of any Murata product for the application of the buyer. The suitability, fitness for any particular use/purpose and/or compatibility of Murata product with any application or device of the buyer remain to be the responsibility and liability of the buyer. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards that anticipate dangerous consequences of failures, moni- tor failures and their consequences, lessen the likelihood of failures that might cause harm, and take appropriate remedial actions. Buyer will fully indemnify and hold Murata, its affiliated companies, and its representatives harmless against any damages arising out of unauthorised use of any Murata products in any safety-critical and/ or life-critical applications. Remark: Murata in this section refers to Murata Manufacturing Company and its affiliated companies worldwide including, but not limited to, Murata Power Solutions.