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| 型號： | TPS2384PJDG4 |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 4-CHANNEL POWER SUPPLY MANAGEMENT CKT, PQFP64 |
| 封裝： | GREEN, PLASTIC, HTQFP-64 |
| 文件頁數(shù)： | 3/50頁 |
| 文件大小： | 1402K |
| 代理商： | TPS2384PJDG4 |
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AUTO MODE FUNCTIONAL DESCRIPTION
Auto Mode
SLUS634D – NOVEMBER 2004 – REVISED MARCH 2007
Auto mode (AM, MS = 0) operation is the basic approach for applying power to IEEE compliant PD’s. When AM
has been selected the TPS2384 automatically performs the following functions:
Discovery of IEEE 802.3af compliant powered devices (PD's)
Classification
Power delivery
Port over/under voltage detection
Port over current detection (350 mA < I
PORT < 400 mA
Port maximum current limit (400 mA < I
PORT < 450 mA)
DC Disconnect (5 mA < I
PORT < 10 mA)
Thermal shutdown protection (TSD), (T
J > 150°C)
Internal oscillator watchdog
In AM the contents of all read registers are available via the I2C interface. In addition all control registers except
for the function bits can be written. This supports a semi-automode where the TPS2384 auto detects compliant
PD's while a host can access the A/D registers and class information and then implement power management
(including turning a port off, responding to faults, etc).
The write registers that are still active in AM are:
All ports disable – Common Control register 0001b
Over/Under Voltage Faults – Common Control register 0001b
Software reset – Common Control register 0001b
Disconnect disable – Port Control 1 register 0010b
Discovery fault disable – Port Control 1 register 0010b
Port enable – Port Control 2 register 0011b
For Alternative B, semi-auto mode implementations which will manipulate the all Ports Disable or Port Enable
bits, please contact the factory for additional application information.
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