P1977NLT PULSE | Alldatasheet
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 2
Technical content
For use with Linear Technology’s LT1681 and LTC1698 /MT52/MT88/MT32/MT46/MT48/MT54/MT48 /MT32/MT32/MT32/MT32/MT32/MT49/MT44/MT53/MT50 /MT46/MT51/MT50/MT53 /MT56/MT44/MT50/MT54 /MT77/MT65/MT88 /MT50/MT88/MT216/MT32/MT46/MT49/MT48/MT48 /MT32/MT32/MT32/MT32/MT32/MT32/MT32/MT32/MT50/MT44/MT53/MT52 /MT46/MT48/MT48/MT53/MT47/MT48/MT44/MT49/MT51 /MT52/MT32/MT83/MT85/MT82/MT70/MT65/MT67/MT69/MT83 /MT80/MT65/MT48/MT49/MT57/MT49 /MT68/MT97/MT116/MT101/MT32/MT67/MT111/MT100/MT101 /MT67/MT111/MT117/MT110/MT116/MT114/MT121/MT32/MT111/MT102/MT32/MT79/MT114/MT105/MT103/MT105/MT110 /MT46/MT51/MT48/MT53 /MT55/MT44/MT55/MT53 /MT32/MT46/MT53/MT51/MT48 /MT49/MT51/MT44/MT52/MT54 /MT46/MT50/MT51/MT53 /MT53/MT44/MT57/MT55 /MT50/MT88/MT32/MT46/MT49/MT48/MT48 /MT32/MT32/MT32/MT32/MT32/MT50/MT44/MT53/MT52 /MT32/MT46/MT53/MT53/MT49 /MT49/MT52/MT44/MT48/MT48 /MT32/MT46/MT57/MT49/MT53 /MT50/MT51/MT44/MT50/MT52 /MT49/MT46/MT48/MT57/MT48 /MT50/MT55/MT44/MT54/MT57 /MT77/MT65/MT88 /MT32/MT46/MT56/MT54/MT48/MT32/MT32/MT77/MT65/MT88/MT50/MT49/MT44/MT56/MT52 /MT46/MT51/MT54/MT48 /MT57/MT44/MT49/MT52 /MT46/MT49/MT56/MT48 /MT52/MT44/MT53/MT55 /MT46/MT50/MT54/MT53 /MT54/MT44/MT55/MT51 /MT83/MT85/MT71/MT71/MT69/MT83/MT84/MT69/MT68/MT32/MT80/MT65/MT68/MT32/MT76/MT65/MT89/MT79/MT85/MT84 /MT50/MT88/MT32/MT46/MT49/MT53/MT48 /MT32/MT32/MT32/MT32/MT32/MT51/MT44/MT56/MT49 /MT52/MT88/MT216/MT32/MT46/MT48/MT56/MT48 /MT32/MT32/MT32/MT32/MT32/MT32/MT32/MT32/MT50/MT44/MT48/MT51 /MT32/MT46/MT53/MT51/MT48 /MT49/MT51/MT44/MT52/MT54 /MT32/MT46/MT57/MT49/MT53 /MT50/MT51/MT44/MT50/MT52 /MT32/MT46/MT52/MT48/MT53 /MT49/MT48/MT44/MT50/MT57 /MT46/MT51/MT54/MT48 /MT57/MT44/MT49/MT52 /MT46/MT49/MT56/MT48 /MT52/MT44/MT53/MT55 /MT80/MT73/MT78/MT32/MT55/MT80/MT73/MT78/MT32/MT53 /MT80/MT73/MT78/MT32/MT49 /MT80/MT73/MT78/MT32/MT52 /MT50/MT88/MT32/MT46/MT49/MT48/MT48 /MT32/MT32/MT32/MT32/MT32/MT50/MT44/MT53/MT52 /MT80/MT73/MT78/MT32/MT51 /MT80/MT73/MT78/MT32/MT50 /MT46/MT51/MT50/MT53 /MT56/MT44/MT50/MT54 /MT77/MT65/MT88 /MT46/MT48/MT48/MT53/MT47/MT48/MT44/MT49/MT51 /MT51/MT32/MT83/MT85/MT82/MT70/MT65/MT67/MT69/MT83 /MT32/MT46/MT56/MT53/MT53/MT32/MT32/MT77/MT65/MT88/MT50/MT49/MT44/MT55/MT50 /MT46/MT50/MT55/MT53 /MT54/MT44/MT57/MT57 /MT46/MT51/MT54/MT48 /MT57/MT44/MT49/MT52 /MT46/MT56/MT48/MT48 /MT50/MT48/MT44/MT51/MT50 /MT77/MT65/MT88 /MT80/MT65/MT48/MT49/MT57/MT49 /MT68/MT97/MT116/MT101/MT32/MT67/MT111/MT100/MT101 /MT67/MT111/MT117/MT110/MT116/MT114/MT121/MT32/MT111/MT102/MT32/MT79/MT114/MT105/MT103/MT105/MT110 /MT49 /MT50 /MT50/MT88/MT32/MT46/MT49/MT53/MT48 /MT32/MT32/MT32/MT32/MT32/MT51/MT44/MT56/MT49 /MT46/MT50/MT55/MT53 /MT54/MT44/MT57/MT57 /MT46/MT51/MT54/MT48 /MT57/MT44/MT49/MT52 /MT83/MT85/MT71/MT71/MT69/MT83/MT84/MT69/MT68/MT32/MT80/MT65/MT68/MT32/MT76/MT65/MT89/MT79/MT85/MT84 /MT80/MT73/MT78/MT32/MT49 /MT80/MT73/MT78/MT32/MT50 /MT50 /MT55 /MT53 /MT49 /MT57/MT84 /MT52 /MT51 /MT55/MT84 /MT50/MT84 /MT49 /MT50 /MT51/MT84 Mechanicals Schematics NEW! P553.A (7/02) PA0191 P1977 Dimensions: Inches mm Unless otherwise specified, all tolerances are ± .010 0,25 PLANAR TRANSFORMER – PA0191 Power Rating: 60-100W Height: 8.3 mm Max Footprint: 27.7 mm x 21.8 mm Max PLANAR INDUCTOR – P1977 Energy Storage: 420 µJ (2.1 µH/20A) Height: 8.3 mm Max Footprint: 21.7 mm x 20.3 mm Max Inductance DCR Inductance Saturation Current 3 HeatingPart @Irated Irated (mΩ) @ 0 ADC (A) Current 4 Number (µH ±5%) (ADC) TYP MAX (µH ±5%) @ 25°C @ 125°C (A) Electrical Specifications @ 25°C — Operating Temperature -40°C to 125°C Part Power Turns Ratio Primary Primary Leakage DCR Number Rating 1 (with 7T Pri. Aux.) Secondary Inductance Inductance Primary Primary Aux. Secondary Isolation (µH MIN) (µH MAX) (mΩ MAX) (m Ω MAX) (m Ω MAX) PA0191 60-100 W 9:2 1500 Vdc Basic 100 1.5 85 800 2.5 Electrical Specifications @ 25°C — Operating Temperature -40°C to 125°C US 619 674 8100 •• UK 44 1483 401 700 •• France 33 3 84 35 04 04 •• Singapore 65 287 8998 •• Taiwan 886 2 2698 0228 •• Hong Kong 852 2788 6588 •• http://www.pulseeng.com PA0191 P1977
For use with Linear Technology’s LT1681 and LTC1698 P553.A (7/02) For More Information : Performance warranty of products offered on this data sheet is limited to the parameters specified. Data is subject to change without notice. Other brand and product names mentioned herein may be trademarks or registered trademarks of their respective owners. Printed on recycled paper. ©2002, Pulse Engineering, Inc. For PA0191: Basic Insulated Planar Transformer 1.To determine if the transformer is suitable for your application it is necessary to ensure that the temperature rise of the compo- nent (ambient plus temp. rise) does not exceed its operating temperature. To determine the temperature rise of the compo- nent it is necessary to calculate the total power losses (copper and core) in the application. Total Copper Losses CopperTotal (W) = sum of the losses in each winding The losses in each winding can be calculated by: CopperWindingX (W) = .001 * DCR(mΩ) * (Irms Core Losses To calculate the core loss, use the following formula: CoreLoss (W) = 2.5E-8 * (Freq kHz) 1.7 * (∆B/2000)2.5 where: ∆B/2000 = 1.01 * (Voltage Min * Dutycycle Max/Freq kHz) Temperature Rise TempRise (°C) = .603 * CopperTotal (W) * (50.6 * CoreLoss (W)/CopperTotal (W) + 88.1) For P1977: Planar Inductor 2.The rated current as listed is either the saturation current or the heating current depending on which value is lower. 3.The saturation current is the current which causes the induc- tance to drop by 10% at the stated ambient temperatures (25°C, 125°C). This current is determined by placing the component in the specified ambient environment and applying a short duration pulse current (to eliminate self-heating effects) to the compo- nent. 4.The heating current is the dc current which causes the tempera- ture of the part to increase by approximately 40°C. This current is determined by mounting the component on a PCB with a .25" wide (2 ounce equivalent copper traces) and applying the current to the device for 30 minutes. 5.In high volt*time applications additional heating in the compo- nent can occur due to core losses in the inductor which may neccessitate derating the current in order to limit the tempera- ture rise of the component. In order to determine the approxi- mate total losses (or temperature rise) for a given application both copper and core losses should be taken into account. Total Copper Losses CopperTotal (W) = .001* DCR(mΩ) * (Irms where: Irms = (IDC 2 + (∆I/2)2).5 Core Losses To calculate the core loss, use the following formula: CoreLoss (W) = 2.5E-8 * (Freq kHz) Temperature Rise TempRise (°C) = .603 * CopperTotal (W) * (50.6 * CoreLoss (W)/CopperTotal (W) + 88.1) The PA0191 transformer and P1977 inductor were designed for use with Linear Technology's LT1681 and LTC1698 IC's and are featured in Linear Technology's Design note 261 which details the solution for a low cost, discrete component alternative to telecom power modules. The PA0191 transformer and P1977 inductor were designed for (but not limited to) the following application: Topology – Two-switch forward Frequency – 230 kHz Pri./Sec. Isolation – Basic Insulation (1500 Vdc) Input Voltage – 36-72 v telecom input Output Voltage(s) – 3.3 v / 20 A output (with an auxilary primary side control winding - 12 v/100 mA) Notes from Tables APPLICATION NOTES /MT80/MT49/MT57/MT55/MT55/MT32/MT73/MT110/MT100/MT46/MT32/MT118/MT115/MT46/MT32/MT67/MT117/MT114/MT114/MT101/MT110/MT116 /MT48/MT46/MT48/MT48 /MT48/MT46/MT53/MT48 /MT49/MT46/MT48/MT48 /MT49/MT46/MT53/MT48 /MT50/MT46/MT48/MT48 /MT50/MT46/MT53/MT48 /MT48 /MT53 /MT49/MT48 /MT49/MT53 /MT50/MT48 /MT50/MT53 /MT73/MT110/MT100/MT32/MT40/MT181/MT72/MT41 /MT67/MT117/MT114/MT114/MT101/MT110/MT116/MT32/MT40/MT65/MT41 /MT50/MT53/MT176/MT67/MT49/MT48/MT48/MT176/MT67 UNITED STATES (Worldwide)
12220 World Trade Drive
San Diego, CA 92128 U.S.A. http://www.pulseeng.com TEL: 858 674 8100 FAX: 858 674 8262 UNITED KINGDOM (Northern Europe) 1 & 2 Huxley Road The Surrey Research Park Guildford, Surrey GU2 5RE United Kingdom TEL: 44 1483 401700 FAX: 44 1483 401701 FRANCE (Southern Europe) Zone Industrielle F-39270 Orgelet France TEL: 33 3 84 35 04 04 FAX: 33 3 84 25 46 41 TAIWAN, R.O.C. (Northern Asia) 3F-4, No. 81, Sec. 1 HsinTai Wu Road Hsi-Chih, Taipei Hsien Taiwan, R.O.C. Tel: 886 2 2698 0228 FAX: 886 2 2698 0948 SINGAPORE (Southern Asia)
150 Kampong Ampat
#07-01/02 KA Centre Singapore 368324 TEL: 65 287 8998 FAX: 65 280 0080 HONG KONG (China/Hong Kong) 19/F, China United Plaza
1008 Tai Nan West Street
Cheung Sha Wan, Kowloon Hong Kong, China TEL: 852 2788 6588 FAX: 852 2776 1055 DISTRIBUTOR