L6924D013TR View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

L6924D013TR

Battery charger system with integrated power switch for Li-ION/Li-POLYMER

STMicroelectronics 

Pins description and connection diagrams

L6924D

2.1 Pin description

Table 2.

Pin

1

2

3-4

5

6

7

8

9

10

11

12

13

14

15

16

Pin functions

I/O

Name

Pin description

I

VIN Input pin of the power stage.

Supply voltage pin of the signal circuitry.

I

VINSNS The operating input voltage range is from 2.5V and 12V, and the start-up

threshold is 4V.

O

ST2-ST1 Open-collector status pins.

Maximum charging time program pin.

I

TPRG It must be connected with a capacitor to GND to fix the maximum charging time,

see Chapter 7.8: Maximum charging time on page 22

-

GND Ground pin.

I

SD

Shutdown pin.

When connected to GND enables the device; when floating disables the device.

Temperature monitor pin.

It must be connected to a resistor divider including an NTC or PTC resistor. The

I

TH charge process is disabled if the battery temperature (sensed through the NTC or

PTC) is out of the programmable temperature window see Chapter 8.1: NTC

thermistor on page 25 .

Output voltage selection pin.

I

VOPRG If is it floating, VOUT = 4.1V. If is it connected to GND, VOUT = 4.2V.

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 1.8V±2%)

Charge termination pin.

A resistor connected from this pin to GND fixes the charge termination current

I/O

IEND

threshold IENDTH: if I < IENDTH, the charger behaves according to the VPRE status

(see Chapter 7.5: End-of-charge current on page 20). The voltage across the

resistor is proportional to the current delivered to the battery (Gas Gauge

function).

Multifunction pin.

A resistor connected to GND allows the user to adjust the pre-charge voltage

threshold VPRETH.

I

VPRE

– If the pin is floating, VPRETH = 2.8V. If the voltage on VPRE pin is lower than

0.8V, VPRETH = 2.8V and the charge is not automatically terminated when I <

IENDTH.

– If the voltage on VPRE goes lower than 0.5V (edge sensitive), the maximum

charging time is reset.

Charge current program pin.

I

IPRG A resistor connected from this pin to GND, fixes the fast charge current value

(ICHG), with an accuracy of 7%.

Pre-charge current program pin.

I

IPRE

If the pin is floating IPRETH is equal to 10% of ICHG. If IPRETH has to be

programmed at a different value, the pin has to be connected to GND or VREF,

through a resistor see Chapter 7.2: Pre-charge current on page 18.

6/38

Share Link: