ne57610 NXP Semiconductors, ne57610 Datasheet - Page 11

• Manufacturer Part Number: ne57610
• Description: Li-ion Battery Charger Control With Adjustable Thresholds
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Charge-mode indicators
Determining which state the battery charger is operating is easily
done by viewing the red and green LEDs which should be wired
between pins 22 and 21, respectively, and the input voltage source.
Each LED should have a 150
states of these LEDs and the two test pins (TP1 (pin3) and TP2
(pin4)).
Table 1. Charge mode indicators versus charger activity
2002 Nov 05
Condition
Reconditioning
charge
Preparatory
charge
Normal charge
Charge done
Charge timer
time-out
Fault: V
V
LV
Li-ion battery charger control
with adjustable thresholds
, V
IN(min)
OV
, V
LV
Pin 22
(Red)
Blink
ON
ON
OFF
Blink
OFF
CHARGE
START
PACK
VOLTAGE
< V
resistor in series. Table 1 shows the
Pin 21
(Green)
OFF
OFF
OFF
Blink
OFF
OFF
UV
Pin 3
TP1
Low
Low
Low
PACK VOLTAGE
> V
Hi Low
Hi Low
Hi Low
CHARGE
Figure 18. State diagram of charging process.
RATE
1 mA
UV
PACK
VOLTAGE
> V
, < V
UV
OV
Pin 4
TP2
Low
Low
Low
Low
Low
Hi Low
PACK VOLTAGE
> V
UV
AT NORMAL
CHARGE
RATE
11
V
pack
PREPARATORY
Programming the total charge timer
To set the total charge time, place a timing capacitor (C
pin 24 and the ground pins (pins 6 and 7) and a resistor (R
between pins 23 and 24. The typical Li-ion cell requires 3 hours to
totally recharge from V
than or equal to 3 hours should be allowed. The total charge time
can be set by referring to Figure 19.
PACK
VOLTAGE
> V
CHARGE
> V
P
OV
V
V
OV
pack
200 k
100 k
V
HYSTERESIS
pack
< V
OV
> V
Figure 19. Total charge time versus C
– V
OV
PREP
TIMER
TIME-OUT
1 mA CHARGE
TIMER TIME-OUT
OV(hys)
1
0.0047 F
UV
SL01860
5
5
TERMINATE
and V
CHARGE
PRECHARGE TIME-OUT (MINUTES)
2
CHARGE TIME-OUT (HOURS)
1 mA TIME-OUT (SECONDS)
OV,
10
so a charge period of greater
10
3
OSCILLATOR CAPACITOR
0.022 F
0.01 F
15
4
15
NE57610
T
5
.
T
Product data
) between
20
OSC
SL01864
20
)
6