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LTC4098EPDC-TRPBF Datasheet(PDF) 10 Page - Linear Technology |
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LTC4098EPDC-TRPBF Datasheet(HTML) 10 Page - Linear Technology |
10 / 32 page LTC4098/LTC4098-1 10 40981fb VOUT (Pin 12): Output Voltage of the Switching PowerPath Controller and Input Voltage of the Battery Charger. The majority of the portable product should be powered from VOUT. The LTC4098/LTC4098-1 will partition the available power between the external load on VOUT and the internal battery charger. Priority is given to the external load and any extra power is used to charge the battery. An ideal diode from BAT to VOUT ensures that VOUT is powered even if the load exceeds the allotted power from VBUS or if the VBUS power source is removed. VOUT should be bypassed with a low impedance multilayer ceramic capacitor. VBUS (Pin 13): Input Voltage for the Switching PowerPath Controller. VBUS will usually be connected to the USB port of a computer or a DC output wall adapter. VBUS should be bypassed with a low impedance multilayer ceramic capacitor. SW (Pin 14): The SW pin delivers power from VBUS to VOUT via the step-down switching regulator. An inductor should be connected from SW to VOUT. See the Applica- tions Information section for a discussion of inductance value and current rating. D0 (Pin 15): Mode Select Input Pin. D0, in combination with the D1 pin and the D2 pin, controls the current limit and battery charger functions of the LTC4098/LTC4098-1 (see Table 1). This pin is pulled low by a weak current sink. D1 (Pin 16): Mode Select Input Pin. D1, in combination with the D0 pin and the D2 pin, controls the current limit and battery charger functions of the LTC4098/LTC4098-1 (see Table 1). This pin is pulled low by a weak current sink. D2 (Pin 17): Mode Select Input Pin. D2, in combination with the D0 pin and D1 pin, controls the current limit and battery charger functions of the LTC4098/LTC4098-1 (see Table 1). This pin is pulled low by a weak current sink. WALL (Pin 18): External Power Source Sense Input. WALL should be connected to the output of the external high voltage switching regulator and to the drain of an external P-channel MOS transistor. It is used to determine when power is applied to the external regulator. When power is detected, ACPR is driven low and the USB input is automatically disabled. ACPR (Pin 19): External Power Source Present Output (Active Low). ACPR indicates that the output of the external high voltage step-down switching regulator is suitable for use by the LTC4098/LTC4098-1. It should be connected to the gate of an external P-channel MOS transistor whose source is connected to VOUT and whose drain is connected to WALL. ACPR has a high level of VOUT and a low level of GND. VC(Pin20):Bat-TrackExternalSwitchingRegulatorControl Output. This pin drives the VC pin of a Linear Technology external step-down switching regulator. In concert with WALL and ACPR, it will regulate VOUT to maximize battery charger efficiency. Exposed Pad (Pin 21): Ground. The Exposed Pad must be soldered to the PCB. PIN FUNCTIONS |
Similar Part No. - LTC4098EPDC-TRPBF |
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Similar Description - LTC4098EPDC-TRPBF |
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