Ordering number :ENN5285
Monolithic linear IC
LA5615M
Lead Battery Charger IC
with Battery Voltage Detection Function
Overview
The LA5615M is an IC that integrates a battery voltage
detection and lead battery charger on a single chip that
supports compact sets.
Package Dimensions
unit: mm
3097-MFP16FS
[LA5615M]
16
9
0.625
5.4
1.8max
0.15
1.35
2.8
0.1
1.5
0.625
Functions and Features
• Charge voltage can be switched between cycle charge
and trickle charge (4.9 V typ.
→
4.6 V typ.).
• Charge current limit can be set with an external resistor
(125 mA typ.).
• Built-in charge current detection circuit
• Built-in battery voltage detection circuit
1
12.6
8
0.35
1.0
SANYO: MFP16FS
Specifications
Maximum Rating
at Ta = 25°C
Parameter
Supply voltage
Battery pin voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
V
Batt
max
Pd max
Topr
Tstg
Conditions
Ratings
15
6
0.7
–20 to +80
–30 to +125
Unit
V
V
mW
°C
°C
Operating Conditions
at Ta = 25°C
Parameter
Supply voltage
Battery pin voltage
CHARGE LED sink current
DET LED sink current
V
Batt
sink current
Symbol
V
CC
V
Batt IN
I
CHG-LED
I
DET-LED
I
Batt-LED
Conditions
Ratings
6.15 to 14.5
0 to 5.5
0 to 40
0 to 40
0 to 40
Unit
V
V
mA
mA
mA
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
22500RM (OT) No. 5285-1/7
6.35
7.6
LA5615M
Electrical Characteristics
at Ta = 25°C, V
CC
= 9 V = V
Batt IN
= 4 V
Parameter
[Charge System]
Charge voltage (when trickle is selected)
Charge voltage (when cycle is selected)
Differential voltage of V
O
2 and V
O
1
Cycle trickle switching current
Output peak current
Line regulation (when trickle is selected)
Line regulation (when cycle is selected)
Load regulation (when trickle is selected)
Load regulation (when cycle is selected)
Current drain
CHARGE LED residual voltage
CHARGE LED leak current
CHARGE detection current
DET LED residual voltage
DET LED leak current
POWER DET detection voltage
POWER DET hysteresis width
[Battery Detection System]
Battery detection voltage
V
BAT
pin residual voltage
V
BAT
pin leak current
Current drain
when detection circuit is OFF
Current drain
when detection circuit is ON
Current drain during Battery SAVE
Battery B residual voltage
[Internal transistors for reset]
REST residual voltage
REST leak current
[Internal transistors for reset]
Threshold voltage
SAVE pin input current
V
SAVE
.TH.
I
SAVE.
.IN
V
IN
= 4 V
1.1
1.27
17
1.5
24
V
µA
V
REST
I
REST
REST.IN = 2 µA, I
IN
= 50 µA
V
IN
= 5 V
0.3
0.5
200
V
nA
V
Batt
V
BAT
I
BAT
I
OFF
I
ON
I
SAVE
V
BAT
.B
I
IN
= 40 mA
V
IN
= 5 V
V
Batt
= 2.5 V
No load
V
Batt
. SAVE = 4 V
I
IN
= 40 mA
5
350
20
1.1
3.17
3.3
0.3
3.43
0.5
200
6
500
30
1.3
V
V
nA
µA
µA
µA
V
V
O
1
V
O
2
∆V
O
I
CT
I
OP
V
OLN
1
V
OLN
2
V
OLD
1
V
OLD
2
I
Q
1
I
Q
2
I
CHG-LED
I
CHARGED
V
DET
I
DET
V
DET-IN
V
DET-HYS
I
IN
= 40 mA
V
IN
= 9 V
5.85
0.1
6.05
0.2
R
L
= 33
Ω
V
CC
= 8 to 14.5 V, I
O
= 10 mA
V
CC
= 8 to 14.5 V, I
O
= 50 mA
I
O
= 0.5 to 30 mA
I
O
= 50 to 60 mA
I
O
= 0 mA
I
O
= 50 mA
V
IN
= 9 V
0.8
1
1.1
I
O
= 10 mA
I
O
= 50 mA
∆V
O
= V
O
2 – V
O
1
4.45
4.75
0.2
34
112.5
4.6
4.9
0.3
40
125
50
100
50
100
6
13
1.1
4.75
5.05
0.4
46
137.5
100
150
100
150
10
21
1.3
200
1.2
1.3
200
6.15
0.3
V
V
V
mA
mA
mV
mV
mV
mV
mV
mA
V
nA
mA
V
nA
V
V
Symbol
Conditions
Ratings
min
typ
max
Unit
V
CHG-LED
I
IN
= 40 mA
No. 5285-2/7
LA5615M
Allowable power dissipation, Pd max — mW
Recommended
board mounting
Independent IC
Operating temperature, Ta — °C
Recommended Board
Copper plating 180 mm
2
Board material: Paper phenol t = 1.5 mm
Pin Assignment
No. 5285-3/7
LA5615M
Sample Application Circuit
To current limiter
Overdrive
control
Reset IC (external)
GND (frame)
Notes: 1. Use capacitors with little temperature-related capacitance fluctuation (Sanyo capacitors, etc.).
2. The reset IC must be provided externally.
No. 5285-4/7
LA5615M
Battery Charger Charging Characteristics
Cycle charge
Current limiting with current limiter
Trickle charge
Battery pin voltage (V)
Charge current characteristics
Detects charge current of 40 mA
and switches charge voltage
from 4.9 V to 4.6 V
*
Charge current is variable
Charge Current (mA)
Charge voltage characteristics
Charging Time
Current Drain Characteristics
(+V
Batt
circuit current)
Reset on
Battery SAVE on current
Reset off current
(+reset circuit current, reset circuit provided externally)
Relationship between Reset and V
Batt
Circuit
V
Batt
voltage
3.3 [V] or higher
Reset voltage 2.8 [V]
The V
Batt
circuit operates at the edge
where the reset voltage becomes Hi.
(At this time, the output transistors are
set on and the load put on; If this
voltage is 3.3 [V] or higher, the V
Batt
circuit operates, and if it is lower than
3.3 [V], it does not start up.)
No. 5285-5/7
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