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TPS2540 Datasheet(PDF) 9 Page - Texas Instruments |
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TPS2540 Datasheet(HTML) 9 Page - Texas Instruments |
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9 / 37 page  TPS2540 TPS2541 www.ti.com SLVSAG2 – OCTOBER 2010 PIN DESCRIPTIONS Pin Descriptions NAME PIN I/O DESCRIPTION Power Switch Input voltage; connect a 0.1-µF or greater ceramic capacitor from IN to GND as close IN 1 PWR to the device as possible. OUT 12 PWR Power-switch output. GND 14 PWR Ground connection; should be connected externally to Power PAD. Internally connected to GND; used to heat-sink the part to the circuit board traces. POWERPAD N/A Connect to GND plane. Current-Limit Threholds and Indication External resistor used to set current-limit threshold when ILIM_SEL is LO; ILIM0 16 I recommended 16.9 k Ω ≤ RILIM ≤ 750 kΩ; External resistor used to set current-limit threshold when ILIM_SEL is HI; ILIM1 15 I recommended 16.9 k Ω ≤ RILIM ≤ 750 kΩ; Logic-level input signal used to dynamically change power switch current-limit ILIM_SEL 4 I threshold; logic LO selects ILIM0, logic HI selects ILIM1. Active-low open-drain output, asserted during over-temperature or current limit FAULT 13 O conditions. Input Logic Control Signals Logic-level control input for turning the power switch and the signal switches on/off. TPS2540: When EN is low, the device is disabled, the signal and power switches are EN, DSC 5 I OFF. TPS2541: When DSC is low, the device is disabled, the signal and power switches are OFF and the output (OUT) capacitor is discharged. CTL1 6 I Logic-level control inputs for controlling the charging mode and the signal switches. CTL2 7 I The TPS2540 and TPS2541 use different control line truth tables. With the TPS2540, the “000” configuration is used to force a discharge of the output (OUT) capacitor. CTL3 8 I D+/D- Data Line Signals D- data line to connector, input/output used for hand-shaking with portable DM_IN 11 I/O equipment. D+ data line to connector, input/output used for hand-shaking with portable DP_IN 10 I/O equipment. DM_OUT 2 I/O D- data line to USB host controller. DP_OUT 3 I/O D+ data line to USB host controller. N/C 9 No connect pin. Can be grounded or left floating. Copyright © 2010, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Link(s): TPS2540 TPS2541 |
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