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TPS2459 Datasheet(PDF) 8 Page - Texas Instruments |
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TPS2459 Datasheet(HTML) 8 Page - Texas Instruments |
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8 / 44 page  DEVICE INFORMATION 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 VINT SDA SCL PG12 SUM12 FLT12 OUT12 BLK PowerPAD TM TPS2459 (Top View) 24 23 22 21 20 19 18 17 25 AGND VDD3 SUM3 PG3 FLT3 GNDS OUT3 A1 3-V Inputs 12-V Inputs 12-V Inputs TPS2459 SLUS917 – FEBRUARY 2009 ............................................................................................................................................................................................ www.ti.com Figure 1. TERMINAL FUNCTIONS PIN NAME I/O DESCRIPTION NO. A0 30 I I2C™ address programming bit, LSB A1 18 I I2C™ address programming bit, LSB+1 A2 25 I I2C™ address programming bit, LSB+2 Analog ground. Ground pin for the analog circuitry insideBypass capacitor connection point for internal supply AGND 23 — the TPS2459. 12-V blocking transistor gate drive. Gate drive pin for the 12-V channel BLK FET. This pin sources 30 µA to BLK 6 O turn the FET on. An internal clam prevents this pin from rising more than 14.5 V above OUT12. Setting the OREN pin high holds the BLK pin low. 12-V enable. (active high). Pulling this pin low turns off the 12-V channel by pulling both BLK and PASS low. EN12 28 I An internal 200-k Ω resistor pulls this pin up to VINT when disconnected. 3-V enable. (active high) Pulling this pin low turns off the 3-V channel by pulling the gate of the internal pass EN3 26 I FET to GND. An internal 200-k Ω resistor pulls this pin up to VINT when disconnected. 12-V fault output (active low) Open-drain output indicating that channel 12 has remained in current limit long FLT12 7 O enough to time out the fault timer and shut the channel down. asserted when 12-V fault timer runs out 3-V fault output (active low) Open-drain output indicating that channel 3 has remained in current limit long FLT3 19 O enough to time out the fault timer and shut the channel down. asserted when 3-V fault timer runs out GNDA 29 — 12-V power ground. GNDB 9 GNDE 27 GNDN 31 — Ground. GNDS 24 IN3 16 I 3-V input. Supply pin for the 3-V channel internal pass FET. IN12 15 I 12-V input. Supply pin for 12-V channel internal circuitry. NC 32 — No connection. 8 Submit Documentation Feedback Copyright © 2009, Texas Instruments Incorporated Product Folder Link(s): TPS2459 |
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