MSP series of high permeability magnetic cores with or without DC biasing possibility are designed for several types of pulse transformers for modern communication equipment for ISDN, LANs, xDSL digital networks, modems, etc.
Pulse transformers and interface matching chokes for digital communication networks must have high magnetic permeability at maximum possible DC biasing. Traditionnaly Mn-Zn ferrite was used as the main magnetic material for pulse transformers and interface chokes. However, due to low permeability and respectively low impedance it is difficult to achieve small size of products. If the increase in impedanceis achieved by increasing the number of winding turns, the frequency characteristics will deteriorate: the parasitic capacitance increases and the resonance frequency decreases. As a result, it is difficult to ensure compliance with the ITU-T I.430.
The offered MSP series magnetic cores made of thin (25 um) Co-based amorphous ribbon provide small size and excellent characteistics of pulse transformers and chokes for all ISDN interfaces: S2m, S0, Up0, Uk0; are optimized for xDSL technologies and data link chokes.
CONFIGURATION:
Ribbon wound magnetic core is placed into hard protective container of glass-polyamide and mechanically fixed with silicone sealant.The container has rounded edges and is designed forwinding. The container provides reliable mechanical protection and preservation of amorphous material's properties. All materials comply with UL94V-1/0.
ADVANTAGES:
- High permeability with possibility of DC bias
- Small size
- High impedance in a wide frequency range
- Comply with ITU-T I.430
- Low attenuation in a wide frequency range
- Insulation requirements comply with IEC 950, EN 60950, BS 601
- Low loss
- Decrease in power consumption of communication equipment
APPLICATION:
S0 interface:
- Connection between network temination (NT) and terminal equipment (TE)
- Connection between PABX and TE
Up0/Uk0 interface:
- Connection between local central office and network termination (NT1)
S2m interface:
- Connection between local central ofice and PABX
ENTRY EXAMPLE:
MSP-10S-32, where:
- MS – MSTATOR;
- P – application (telecommunications);
- 10 – outer diameter in mm;
- S – cross section reference code;
- 32 – designing code.
DIMENSIONS AND KEY FEATURES:
| TYPE |
Dimensions in container (without a container) (O.D. – I.D. - H) mm |
Mean line length Lm, mm |
Cross-section Ac, mm2 |
Inductance ratio ALo* (mH/turn2) |
Inductance ratio ALdc* (mH/turn2) |
Type application |
|---|---|---|---|---|---|---|
| Номин. | Номин. | Мin. | Min. | |||
| MSP-10S-32 | 11,1-5,1-5,8 | 25,5 | 6,1 | 26,0 (a) | - | S2M |
| MSP-10B-30 | 11,1-5,3-7,6 | 25,5 | 8,2 | 20,7 (a) | 14,1 (b) | S0 (1mA) |
| MSP-10S-18 | 11,1-5,1-5,8 | 25,5 | 6,1 | 18,4 (a) | 12,4 (c) | S0 (3mA) |
| MSP-06A-12 | 6,8-3,0-4,1 | 15,0 | 3,8 | 9,8 (a) | 6,9 (d) | S0 (4mA) |
| MSP-10S-14 | 11,1-5,1-5,8 | 25,5 | 6,1 | 8,9 (a) | 6,1 (e) | S0 (5mA) |
| MSP-07A-08 | 7,5-3,0-4,2 | 15,9 | 5,2 | - | 0,6 (f) | Upo, DSL |
| MSP-10S-03 | 11,1-5,1-5,8 | 25,5 | 6,1 | - | 0,315 (g) | Uko, DSL |
| * - Min. value of initial inductivity ratio @ F=10 kHz, Urms=0,1V, T=25°C, ** - Min. value @ DC bias (Urms=0,1V, T=25°C,) | ||||||
| (а) - Idc = 0, F=10 kHz | ||||||
| (b) - Idc x N = 19 mA x turn, F = 20 kHz | ||||||
| (c) - Idc x N = 66 mA x turn, F = 20 kHz | ||||||
| (d) - Idc x N = 120 mA x turn, F = 20 kHz | ||||||
| (e) - Idc x N = 145 mA x turn, F = 20 kHz | ||||||
| (f) - Idc x N = 4500 mA x turn, F = 20 kHz | ||||||
| (g) - Idc x N = 10,2 A x turn, F = 20 kHz | ||||||
* - Min. value of initial inductivity ratio @ F=10 kHz, Urms=0,1V, T=25°C, ** - Min. value @ DC bias (Urms=0,1V, T=25°C,); Type application Cross-section
Ac, mm2; Dimensions in container (without a container)
(O.D. – I.D. - H)
ADDITIONAL PARAMETERS AND CHARACTERISTICS:
- Common hysteresis loop
- Dependence of suppression on frequency (MSP-10S-32)
- Dependence of magnetic permeability on frequency (MSP-10S-32)
- Dependence of inpedance on frequency (MSP-10S-18)
- Dependence of permeability on DC bias
- Dependence of magnetic permeability on frequency (for various part-types)
- Dependence of permeability on DC bias (for various interfaces)
