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參數資料

TPS5102

DUAL, HIGH-EFFICIENCY CONTROLLER FOR NOTEBOOK PC POWER

SLVS239 - SEPTEMBER 1999

POST OFFICE BOX 655303

DALLAS, TEXAS 75265

detailed description (continued)

current protection

Current protection is achieved by sensing the high-side power MOSFET drain-to-source voltage drop during

on-time at VCC_CNTP and LL. An external resistor between Vin and TRIP pin in serial with the internal current

source adjusts the current limit. When the voltage drop during the on-time is high enough, the current

comparator triggers the current protection and the circuit is reset. The reset repeats until the over-current

condition is removed.

COMP

COMP is an internal comparator used for any voltage protection such as the output under-voltage protection

for notebook power applications. If the core voltage is lower than the setpoint, the comparator turns off both

channels to prevent the notebook from damage.

SOFT1, SOFT2

Separate softstart terminals make it possible to set the start-up time of each output for any possibility.

STBY1, STBY2

Both channels can be switched into standby mode separately by grounding the STBY pin. The standby current

is as low as 1

ULVO

When the input voltage goes up to about 4 V, the IC is turned on, ready to function. When the input voltage is

lower than the turn-on value, the IC is turned off. The typical hysteresis is 40 mV.

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