Description
ETAL P3191TR Telecommunications Transformer SMT / SMD V.22 V.34 RoHS
ETAL P3191-TR Microprofile SMD LINE Matching Transformer
Features
Surface Mount Lead-free (Pb-free) RoHS compliant 7mm seated height Vacuum encapsulated IEC 60950 and UL 60950 certified UL Recognized Component Simple 600 match
DESCRIPTION
is a low distortion microprofile transformer for applications where high performance and safety isolation to international standards are required in an extremely small case size. Designed specifically as a surface mount device, the P3191 features a 7mm seated height and is offered in the same package as the now familiar P2781. The part is compliant with RoHS Directive 2002/95/EC, and suitable for lead-free and conventional placement and reflow. Despite the subminiature size, the performance is superior to that of much larger components. The P3191 offers reinforced insulation, is ideal for data communications at high data rates, and can be matched to both 600 and complex impedance telephone lines. When used with 600 lines no external compensation components are required. At moderate transmit power levels (e.g. -10dBm) performance to 33,600 bits/second may be achieved. P3191 is certified to IEC 60950 and a UL Recognized Component, and is supported an IEC CB Test Certificate.
SPECIFICATIONS
= 25°C and as circuit Fig. 2 unless otherwise stated. Parameter Insertion Loss Frequency response Conditions -3dB LF cutoff -3dB HF cutoff -10dBm in line – 5kHz Method TG25 Excitation 50Hz 250Vrms. Output voltage across line 50Hz DC Ambient temperature °C %R.H. Min 16 80 Typ 35 -93 Max 4.5 ±0.2 Units dB Hz kHz dB dBm dB
Return Loss Third Harmonic Distortion (1) Balance Saturation
Lumped equivalent circuit parameters as Fig. 1 DC resistance, RDC(3) Leakage inductance L Shunt inductance Lp(4) Shunt loss Rp
Notes 1. Third harmonic typically exceeds other harmonics 20dB. 2. Components are 100% tested at 6.5 kVDC. 3. Caution: do not pass DC through windings. Telephone line current, etc. must be diverted using choke or semiconductor line hold circuit. 4. At signal levels greater than 100mV, Lp will increase and Rp will decrease slightly but the effect is usually favourable to the return loss characteristic. 5. Excludes shipping materials. Components are dry-packed and sealed as shipped. Handle in accordance with IPC/JEDEC J-STD-033 procedure for components classified as IPC/JEDEC J-STD-020 Moisture Sensitivity Level 5a.
In practice, the 910 load resistor will connect to a low output impedance TX driver. The 100nF capacitor should appear in parallel with the 910 load resistor (rather than in parallel with transformer winding) to obtain optimum TX flatness to line.
T olerance 0.3mm T erminals electroplated pure tin n) 5µm minimum. JES D97 c ategory e3. T erminal size 1.5 (0.06) long, 1.32 (0.05) wide
Dimensions shown are in millimetres (inches). Geometric centres of outline and pad grid coincide within a tolerance circle of 0.3mm. Windings may be used interchangeably as primary or secondary.
Part Number: P3191TR
Manufacturer: ETAL
Description: TRANSFORMER
Manufacturer:Etal
Datasheet:P3191TR.pdf
