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TPS2514A Datasheet(PDF) 11 Page - Diodes Incorporated |
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TPS2514A Datasheet(HTML) 11 Page - Diodes Incorporated |
11 / 20 page D- D+ GND VBUS 5 V 1.2 V 2.7V 2.0V S1 S2 S3 S4 DP1 DM1 GND TPS2513, TPS2514 Divider 2 S1, S2: ON S3, S4: OFF Short Mode S4 ON S1, S2, S3: OFF 1.2V on DP1 and DM1 S3, S4: ON S1, S2: OFF D- D+ GND VBUS 200 (max) 5.0 V 1.2 V TPS2513, TPS2513A TPS2514, TPS2514A www.ti.com SLVSBY8B – MAY 2013 – REVISED SEPTEMBER 2013 Applying 1.2 V to the D+ Line and 1.2 V to the D– Line As shown in Figure 12, some tablet USB chargers require 1.2 V on the shorted data lines of the USB connector. The maximum resistance between the D+ line and the D- line is 200 Ω. Figure 12. DCP Applying 1.2 V to the D+ Line and 1.2 V to the D– Line The devices are USB dedicated charging port (DCP) controllers. Applications include vehicle power charger, wall adapters with USB DCP and other USB chargers. The device DCP controllers have the auto-detect feature that monitors the D+ and D– line voltages of the USB connector, providing the correct electrical signatures on the DP and DM pins for the correct detections of compliant portable devices to fast charge. These portable devices include smart phones, 5-V tablets and personal media players. DCP Auto-Detect The devices integrate an auto-detect feature to support divider mode, short mode and 1.2 V / 1.2 V modes. If a divider device is attached, 2.7 V is applied to the DP pin and 2 V is applied to the DM pin. If a BC1.2-compliant device is attached, the TPS2513 and TPS2514 automatically switches into short mode. If a device compliant with the 1.2 V / 1.2 V charging scheme is attached, 1.2 V is applied on both the DP pin and the DM pin. The functional diagram of DCP auto-detect feature (DM1 and DP1) is shown in Figure 13. DCP auto-detect feature (DM2 and DP2 of TPS2513) has the same functional configuration. For TPS2513A and TPS2514A, the devices also have DCP auto-detect feature and the auto-detect have the same functional configuration expect for the default mode is Divider 3 (D+/D- = 2.7V / 2.7V). Figure 13. TPS2513 and TPS2514 DCP Auto-Detect Functional Diagram Undervoltage Lockout (UVLO) The undervoltage lockout (UVLO) circuit disables DP1, DM1, DP2 and DM2 output voltage until the input voltage reaches the UVLO turn-on threshold. Built-in hysteresis prevents unwanted oscillations due to input voltage drop from large current surges. Copyright © 2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS2513 TPS2513A TPS2514 TPS2514A |
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