STEVAL-ISA076V1 STMicroelectronics, STEVAL-ISA076V1 Datasheet - Page 20

• Manufacturer Part Number: STEVAL-ISA076V1
• Description: BOARD DEMO BATT CHRGR L6924D
• Manufacturer: STMicroelectronics

Specifications of STEVAL-ISA076V1

• Design Resources: STEVAL-ISA076V1 Bill of Materials STEVAL-ISA076V1 Gerber Files STEVAL-ISA076V1 Schematics
• Featured Product: STM32 Cortex-M3 Companion Products
• Main Purpose: Power Management, Battery Charger
• Embedded: No
• Utilized Ic / Part: L6924D
• Primary Attributes: 1 Cell- Li-Ion / Li-Pol, 4.1V or 4.2V @ 1A, 12V Input
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 497-11036

Applications information: charging process
7.6
7.7
7.8
Note:
20/38
Recharge flow chart
Figure 15. Recharge flow chart
Recharge threshold
When, from an end-of-charge condition, the battery voltage goes lower than the recharging
threshold (V
threshold is V
Maximum charging time
To avoid the charging of a dead battery for a long time, the L6924D has the possibility to set
a maximum charging time starting from the beginning of the fast-charge phase. This timer
can be set with a capacitor, connected between the T
external capacitor (in nF) and is given by the following equation:
Equation 11
The maximum recommended C
YES
Detect High Fault
Detect Low Fault
BATTERY
ABSENT
IND FAULT
FAULT
V
V
V
V
FROM CHARGING PROCESS FLOW CHART
V
V
PRETH
RCH
BAT
>
RCH
BAT
<
ABS
BAT
>
NO
NO
NO
OPRG
GO TO BATTERY ABSENT
), the device goes back in charging state. The value of the recharge
YES
YES
–150 mV.
FLOW CHART
Doc ID 11908 Rev 9
C
END of CHARGE
TPRG
TPRG
Detect High
Detect Low
BATTERY
ABSENT
V
V
V
V
V
V
PRETH
BAT
>
RCH
BAT
>
RCH
BAT
>
NO
NO
NO
=
value must be less than 50 nF.
⎛
⎜
⎜
⎜
⎜
⎝
YES
YES
YES
T
MAXCH
K
T
V
FAST CHARGE
PRE CHARGE
REF
×
DETECT LOW = a I
DETECT HIGH = a I
DETECT LOW FAULT = a I
DETECT HIGH FAULT = a I
V
V
T
I
R
V
SINK
ABS
RCH
DET
PRG
BG
= I
= 100ms (Typ.)
= V
= V
INJ
PRG
OPRG
OPRG
= 1mA (Typ.)
⎞
⎟
⎟
⎟
⎟
⎠
×
– 50mV
– 150mV
10
pin and GND. The C
9
SINK
INJ
RETURN TO CHARGING PROCESS
is injected for a T
is sunk for a T
SINK
INJ
is injected for a T
is sunk for a T
FLOW CHART
DET
DET
from the battery
in the battery
DET
DET
from the battery
in the battery
TPRG
L6924D
is the