VFQFPN16 查看數據表（PDF） - STMicroelectronics

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VFQFPN16

USB compatible battery charger system with integrated power switch for Li-Ion/Li-Polymer

STMicroelectronics 

Pin description

L6924U

Table 2.

Pin

9

10

11

12

13

14

15

16

Pin functions (continued)

I/O

Name

Pin description

Switches between high power USB (IUSB up to 500 mA) and low

power USB (IUSB/5) in USB mode. A low level sets the L6924U in

I

ISEL low power mode and a high level sets the L6924U in high power

mode. When the AC mode is selected, the ISEL pin must be

connected to ground or left floating.

I

VOSNS

Output voltage sense pin.

It senses the battery voltage to control the voltage regulation loop.

O

VOUT Output pin. (connected to the battery)

O

VREF External reference voltage pin. (reference voltage is 1.8 V ± 2 %)

Charge termination pin.

A resistor connected from this pin to GND sets the charge

I/O

IEND termination current threshold IENDTH: if ICHG < IENDTH, the charge

process ends. The voltage across the resistor is proportional to the

current delivered to the battery (gas gauge function).

Selects pin AC adapter or USB port input modes. A high level sets

I

MODE

the L6924U in USB mode while a low level sets the L6924U in the

AC adapter mode. When the AC adapter input is selected, the ISEL

pin status does not affect the current set.

Charge current program pin in USB mode: a resistor connected

I

IUSB

from this pin to ground sets the fast charge current value (IUSB up to

500 mA) with an accuracy of 7 %. The USB high power/low power

mode is selected with the ISEL pin.

Charge current program pin in AC mode: a resistor connected from

I

IAC this pin to GND sets the fast charge current value (IAC up to 1 A)

with an accuracy of 7 %.

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Doc ID 14716 Rev 2

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