Ordering number :ENN5285
22500RM (OT) No. 5285-1/7
Overview
The LA5615M is an IC that integrates a battery voltage
detection and lead battery charger on a single chip that
supports compact sets.
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
Package Dimensions
unit: mm
3097-MFP16FS
1
16
8
9
0.15
0.625
1.35
0.35
1.0
2.8
12.6
5.4
1.8max
1.5
0.1
6.35
7.6
0.625
[LA5615M]
LA5615M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Lead Battery Charger IC
with Battery Voltage Detection Function
Monolithic linear IC
SANYO: MFP16FS
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.
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
max
15
V
Battery pin voltage
V
Batt
max
6
V
Allowable power dissipation
Pd max
0.7
mW
Operating temperature
Topr
20 to +80
C
Storage temperature
Tstg
30 to +125
C
Specifications
Maximum Rating
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
6.15 to 14.5
V
Battery pin voltage
V
Batt IN
0 to 5.5
V
CHARGE LED sink current
I
CHG-LED
0 to 40
mA
DET LED sink current
I
DET-LED
0 to 40
mA
V
Batt
sink current
I
Batt-LED
0 to 40
mA
Operating Conditions
at Ta = 25C
No. 5285-2/7
LA5615M
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
[Charge System]
Charge voltage (when trickle is selected)
V
O
1
I
O
= 10 mA
4.45
4.6
4.75
V
Charge voltage (when cycle is selected)
V
O
2
I
O
= 50 mA
4.75
4.9
5.05
V
Differential voltage of V
O
2 and V
O
1
V
O
V
O
= V
O
2 V
O
1
0.2
0.3
0.4
V
Cycle trickle switching current
I
CT
34
40
46
mA
Output peak current
I
OP
R
L
= 33
112.5
125
137.5
mA
Line regulation (when trickle is selected)
V
OLN
1
V
CC
= 8 to 14.5 V, I
O
= 10 mA
50
100
mV
Line regulation (when cycle is selected)
V
OLN
2
V
CC
= 8 to 14.5 V, I
O
= 50 mA
100
150
mV
Load regulation (when trickle is selected)
V
OLD
1
I
O
= 0.5 to 30 mA
50
100
mV
Load regulation (when cycle is selected)
V
OLD
2
I
O
= 50 to 60 mA
100
150
mV
Current drain
I
Q
1
I
O
= 0 mA
6
10
mV
I
Q
2
I
O
= 50 mA
13
21
mA
CHARGE LED residual voltage
V
CHG-LED
I
IN
= 40 mA
1.1
1.3
V
CHARGE LED leak current
I
CHG-LED
V
IN
= 9 V
200
nA
CHARGE detection current
I
CHARGED
0.8
1
1.2
mA
DET LED residual voltage
V
DET
I
IN
= 40 mA
1.1
1.3
V
DET LED leak current
I
DET
V
IN
= 9 V
200
nA
POWER DET detection voltage
V
DET-IN
5.85
6.05
6.15
V
POWER DET hysteresis width
V
DET-HYS
0.1
0.2
0.3
V
[Battery Detection System]
Battery detection voltage
V
Batt
3.17
3.3
3.43
V
V
BAT
pin residual voltage
V
BAT
I
IN
= 40 mA
0.3
0.5
V
V
BAT
pin leak current
I
BAT
V
IN
= 5 V
200
nA
Current drain
I
OFF
V
Batt
= 2.5 V
5
6
A
when detection circuit is OFF
Current drain
I
ON
No load
350
500
A
when detection circuit is ON
Current drain during Battery SAVE
I
SAVE
V
Batt
. SAVE = 4 V
20
30
A
Battery B residual voltage
V
BAT
.B
I
IN
= 40 mA
1.1
1.3
V
[Internal transistors for reset]
REST residual voltage
V
REST
REST.IN = 2 A, I
IN
= 50 A
0.3
0.5
V
REST leak current
I
REST
V
IN
= 5 V
200
nA
[Internal transistors for reset]
Threshold voltage
V
SAVE
.TH.
1.1
1.27
1.5
V
SAVE pin input current
I
SAVE.
.IN
V
IN
= 4 V
17
24
A
Electrical Characteristics
at Ta = 25C, V
CC
= 9 V = V
Batt IN
= 4 V
No. 5285-3/7
LA5615M
Pin Assignment
Allowable power dissipation, Pd max -- mW
Operating temperature, Ta -- C
Recommended
board mounting
Independent IC
Recommended Board
Copper plating 180 mm
2
Board material: Paper phenol t = 1.5 mm
No. 5285-4/7
LA5615M
Sample Application Circuit
Notes: 1. Use capacitors with little temperature-related capacitance fluctuation (Sanyo capacitors, etc.).
2. The reset IC must be provided externally.
Overdrive
control
GND (frame)
Reset IC (external)
To current limiter
No. 5285-5/7
LA5615M
Battery Charger Charging Characteristics
Cycle charge
Current Drain Characteristics
Relationship between Reset and V
Batt
Circuit
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.)
Current limiting with current limiter
Charge current characteristics
Charge voltage characteristics
Detects charge current of 40 mA
and switches charge voltage
from 4.9 V to 4.6 V
*
Charge current is variable
Trickle charge
Charging Time
Charge Current (mA)
Battery pin voltage (V)
(+V
Batt
circuit current)
Reset on
Battery SAVE on current
Reset off current
(+reset circuit current, reset circuit provided externally)
V
Batt
voltage
Reset voltage 2.8 [V]
3.3 [V] or higher
No. 5285-6/7
LA5615M
Timing Charts
(Battery provided)
(Battery only)
This catalog provides information as of February, 2000. Specifications and information herein are subject
to change without notice.
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent device,
the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could
give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire,
or that could cause damage to other property. When designing equipment, adopt safety measures so
that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective
circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products must
not be exported without obtaining the export license from the authorities concerned in accordance with the
above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system,
or otherwise, without the prior written permission of SANYO Electric Co., Ltd.
Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification"
for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but
no guarantees are made or implied regarding its use or any infringements of intellectual property rights
or other rights of third parties.
PS No. 5285-7/7
LA5615M
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