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TPS2359RHHT Datasheet(PDF) 10 Page - Texas Instruments |
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TPS2359RHHT Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 51 page  DETAILED PIN DESCRIPTION TPS2359 SLUS792D – FEBRUARY 2008 – REVISED JUNE 2008 ................................................................................................................................................... www.ti.com A0, A1, A2 These three pins select one of 27 unique I2C addresses for address of the TPS2359. Each pin may be tied to ground, tied to the VINT pin, or left open. See TPS2359 I2C Interface section for details. AGND Ground pin for analog circuitry inside the TPS2359. BLKx Gate drive pin for the 12x channel BLK FET. This pin sources 30 µA to turn the FET on. An internal clamp prevents this pin from rising more than 14.5 V above OUT12x. Setting the ORENx bit low holds the BLKx pin low. EN3x Active-high enable input. Pulling this pin low turns off channel 3x by pulling the gate of the internal pass FET to GND. An internal 200-k Ω resistor pulls this pin up to VINTwhen disconnected. GNDx Ground pin for power circuitry associated with the 12x channel. These pins should connect to a ground plane shared with the AGND pin. IN12x Supply pin for channel 12x internal circuitry. IN3x Supply pin for channel 3x internal pass FET. IRPT Open drain output that pulls low when internal circuitry sets any of the eight status bits in Register 7. Reading Register 7 restores IRPT to its high-Z state. OUT12x Senses the output voltage of the channel 12x path. OUT3x Output of the channel 3x internal pass FET. PASSx Gate drive pin for the 12x channel PASS FET. This pin sources 30 µA to turn the FET on. An internal clamps prevents this pin from rising more than 14.5 V above IN12x. SCL Serial clock input for the I2C interface. For details of the SCL line, see TPS2359 I2C Interface section. SDA Bidirectional I2C data line. For details of the SDA line, see TPS2359 I2C Interface section for details. SENMx Senses the voltage on the low side of the channel 12x current sense resistor. SENPx Senses the voltage on the high side of the channel 12x current sense resistor. SETx A resistor connected from this pin to SENPx sets the current limit level in conjunction with the current sense resistor and the resistor connected to the SUM12x pin, as described in 12-V thresholds – setting current limit and fast over current trip section. SUMx A resistor connected from this pin to ground forms part of the channel x current limit. As the current delivered to the load increases, so does the voltage on this pin. When the voltage on this pin reaches a threshold (by default 675 mV), the current limit amplifier acts to prevent the current from further increasing. VDD3x Supply pin for channel3x internal circuitry. VINT This pin connects to the internal 2.35-V rail. A 0.1- µF capacitor must be connected from this pin to ground. One can connect the A0–A2 pins to this supply to pull them high, but no other external circuitry should connect to VINT. 10 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): TPS2359 |
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