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TLK100PHP Datasheet(PDF) 10 Page - Texas Instruments |
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TLK100PHP Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 88 page  1 :1 1 :1 T1 RJ 45 3.3V Supply TLK100 11 VDD33_VA11 10 VA11_PFBOUT 1 VA11_PFBIN1 7 VA11_PFBIN2 21 VDD33_VD11 20 VDD11 . 17 VDD33_IO 29 VDD33_IO 5 RD– RD– 6 RD+ RD+ 49.9W 1.0 F m * 8 TD– TD– 9 TD+ TD+ * 41 VDD33_V18 40 V18_PFBOUT 2 V18_PFBIN1 4 V18_PFBIN2 49.9W 49.9W 49.9W 0.1 F m 0.1 F m 0.1 F m 0.1 F m 0.1 F m 0.1 F m 0.1 F m 3.3V Supply 3.3V Supply 0.1 F m 1.0 F m 1.0 F m 3.3V Supply 3.3V Supply TLK100 SLLS931B – AUGUST 2009 – REVISED DECEMBER 2009 www.ti.com 2.10 Power Supply Configuration The TLK100 provides best-in-class flexibility of power supplies. • Single supply operation – If a single 3.3V power supply is desired, the TLK100 will sense the presence of the supply and configure the internal voltage regulators to provide all necessary supply voltages. To operate in this mode, connect the TLK100 supply pins according to the following scheme: Figure 2-1. Power Scheme for Single Supply Operation • Multiple Supply operation – When additional 1.8V and/or 1.1V external power rails are available, the TLK100 can be configured in various ways as given in Table 2-1. This gives the highest flexibility for the user and enables significant reduction in power consumption. When using multiple external supplies, the internal regulators must be disabled by appropriate device connections. – When an external 1.8V rail is available – Connect the external 1.8V to all following TLK100 pins to enable proper operation: V18_PFBOUT (pin 40), V18_PFBIN1 (pin 2), V18_PFBIN2 (pin 4) and VDD33_V18 (pin 41). In addition, connect the 1.8V rail to the transformer center tap to further reduce the transmission power, as shown in Figure 2-2: 10 Pin Descriptions Copyright © 2009, Texas Instruments Incorporated Submit Documentation Feedback Product Folder Link(s): TLK100 |
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