STEVAL-ISB005V1 Low-cost Li-Ion battery charger demonstration board Features

STEVAL-ISB005V1

Low-cost Li-Ion battery charger demonstration board based on the ST7263BK6 and L6924D

Data brief

Features

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■

■

■

■

Can be used both in USB mode and adapter mode

Consists of a charger section based on the

L6924 for charging a Li-Ion / Li-polymer battery, and an action control section using the

ST72F63BK6M1 microcontroller

Uses LEDs to indicate the charging condition status

Includes an ICC connector for programming the microcontroller

RoHS compliant

Description

The STEVAL-ISB005V1 demonstration board is a standalone Li-Ion/ Li-polymer battery charger, which can be powered either by USB or by an external DC adaptor. The ST72F63BK6M1 microcontroller is used for USB enumeration and to control the SD pin of the L6924.

In USB mode, the battery-charging current complies with high-power USB device specifications. The L6924 is powered by 5 V from the USB, thus charging the battery also by USB.

A general-purpose adaptor socket is also available for use when external power is available.

In this case, the L6924 operates completely independent of the microcontroller.

STEVAL-ISB005V1

June 2010 Doc ID 15185 Rev 3

For further information contact your local STMicroelectronics sales office.

1/4 www.st.com

4

Schematic diagram STEVAL-ISB005V1

Figure 1.

STEVAL-ISB005V1 USB system schematics

VIN

SO34

VIN

OSCOUT

OSCIN

RESET

1

2

3

4

5

6

7

8

9

CONTROL_IO

10

AIN7/IT8/PB7

11

AIN6/PB6/IT7

12

VPP/TEST

VPP

13

AIN5/IT6/PB5

14

AIN4/IT5/PB4

IEND

15

AIN3/PB3

16

CHK_CHG

17

AIN1/PB1

MODE

AIN2/PB2

VDD

OSCOUT

OSCIN

VSS

PC2/USBOE

PC1/TDO

PC0/RDI

RESET

NC

VDDA

34

USBVCC

33

USBDM

32

VIN

USBVCC

USBDM

USBDP

31

VSSA

30

USBDP

PA0/MCO

PA1/SDA/ICCDATA

NC

29

MCO

28

27

ICCDATA

NC

26

NC

25

1

PA2/SCL/ICCCLK

PA3/EXTCLK

PA4/ICAP1/IT1

PA5/ICAP2/IT2

PA6/OCMP1/IT3

PA7/OCMP2/IT4

PB0/AIN0

24

23

ICCCLK

ST2

22

ST1

21

ADPT_CHECK

20

VBUS_CHECK

19

SD

18

ISEL

M ICROCONTROLLER SECTION

VSS

3

RST

1

VCC

2

RESET

VIN

STM1001

SOT23

RESET

VIN

VIN

5

7

1

3

9

2

ICCDATA

4

ICCCLK

6

RESET

8

VPP

10

ICC CONNECTOR

8

9

6

7

SHELL

SHELL

SHELL

SHELL

USB_VCC

USBDM

USBDP

ID

USB_GND

3

4

1

2

5

VBUS

. 5A

1

I/O1

2

GND

3

I/O2

VBUS

I/O1

6

I/O2

4

USBLC6- 2SC6

SOT2236L

POWER SUPPLY

USBDM

USBDP

5V

ADAPTOR

3

ADPT_V

2

1

VIN

USB- B CONN

VBUS VIN

VBUS

VBUS_CHECK ADPT_CHECK

ADPT_V

CONTROL_IO

NTC

2

3

2

3

1A

VIN

ST2

ST1

1

Vin

2

VinSNS

5

TPRG

3

ST2

4

ST1

Vout

11 VBAT

Vosns

10

Vpre

14

Ipre

16

Iend

13 IEND

Iprg

15

VPQFN16

MODE

VIN

SD ISEL

BATTERY CHARGER

AM03271v1

2/4 Doc ID 15185 Rev 3

STEVAL-ISB005V1

Table 1.

Date

Document revision history

21-Nov-2008

25-Feb-2010

09-Jun-2010

Revision

1

2

3

Changes

Initial release.

Updated features on cover page.

Modified title on cover page.

Revision history

Doc ID 15185 Rev 3 3/4

STEVAL-ISB005V1

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