Sanyo LA5621V Lithium-ion battery charge control ic Datasheet

Ordering number :EN5640A
Monolithic linear IC
LA5621M, 5621V
Lithium-Ion Battery Charge Control IC
Overview
The LA5621M and LA5621V are external charge control
ICs for lithium-ion batteries. These ICs are ideally suited
for on/off control of external power MOSFETs in systems
that incorporate a charging circuit in the set. They detect
the charge and discharge status, output it to the set control
microcontroller, which then outputs a signal to switch
external power MOSFETS either on or off. Moreover,
these ICs have a built-in function that detects discharge
(countercurrent) from lithium-ion batteries within sets to
external lithium-ion batteries in an AC adapter/charger,
etc. and switches external power MOSFETs off.
Application
• Charge control of 1- or 2-cell lithium-ion batteries of
video cameras, digital still cameras, cellular telephones,
etc., used in combination with a microcontroller.
Functions
• Charge/discharge: In charge/discharge mode, switch
external power MOSFETs on to charge the battery or
discharge it to set load.
• Charge detection: Detect the charge status of lithium-ion
batteries with comparator.
• Charge completion control: When charging of the
lithium-ion battery is completed, the comparator is
activated and the external power MOSFETs are
switched off to stop charging.
• Countercurrent detection and control:
In systems that support charging of both the set of the
video camera, etc., and the AC adapter/charger, when
spare batteries are charged on the AC adapter/charger
side, if the battery voltage on the set side becomes high
when the set is connected to the AC adapter/charger,
current flows out to the battery on the AC
adapter/charger side. These ICs feature a function that
prevents this from happening.
• Charge prevention: A specified voltage is applied to the
CHARGEINH pin to stop charging.
Features
• The combination of a microcontroller and external
power MOSFETs enables easy charge/discharge control
of lithium-ion batteries.
• Small power dissipation makes these ICs suitable for
sets that require long time operation
• Use of compact package makes these ICs suitable for
compact sets.
• Large power supply operation range supports both 1-cell
and 2-cell lithium-ion batteries.
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
31000RM (OT) No. 5640-1/6
LA5621M, 5621V
Package Dimensions
unit: mm
unit: mm
3034A-MFP14
3178-SSOP16
16
9
0.5
6.4
4.4
4.4
5.15
6.4
8
1.0
[LA5621V]
0.625
[LA5621M]
14
1.8max
7
0.15
1
8
5.4
0.15
0.1
0.1
1.5
10.1
1.6max
1
1.27
0.35
1.24
0.22
SANYO: MFP14
0.43
0.65
SANYO: SSOP16
Specifications
Maximum Rating at Ta = 25°C
Parameter
Maximum supply voltage
Allowable power dissipation
Symbol
Conditions
Ratings
VCC max
Pd max
LA5621M
LA5621V
Unit
11
V
320
mW
250
mW
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +125
°C
Ratings
Unit
Allowable Operating Conditions at Ta = 25°C
Parameter
Symbol
Conditions
Supply voltage 1
VCC1
VCC1 ≤ VCC2
1 to 11
V
Supply voltage 2
VCC2
VCC1 ≤ VCC2*
2 to 5.5
V
Note: * When VCC1 < 2 V, only the gate block (external power MOSFET drive) operates.
Electrical Characteristics at Ta = 25°C, VCC1 = 5.5 V, VCC2 = 3.15 V (unless otherwise specified)
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
Current drain 1-1
(During set operation discharge)
ICC1-1
VCC1 in current, VCHG = VCC2,
SW4, 6: on, SW5: off
90
120
µA
Current drain 2-1
(During set operation discharge)
ICC2-1
VCC2 in current, VCHG = VCC2,
SW4, 6: on, SW5: off
20
26
µA
Current drain 1-2
(During charging outside set)
ICC1-2
VCC2 in current, VCHG = VCC2,
SW4, 5: on
20
26
µA
Current drain 2-2
(During charging)
ICC2-2
VCC2 in current
SW5: on, VCPU: L, VGATE:H
600
800
µA
VCPU-H
VIN1– = 15 mV, VIN1+ = 11 mV,
VCHG = VCC2, SW4: off, SW5: on
[Output pin block]
High-level CPU pin
1–
VCC2 – 0.15
V
VIN1+
VCPU-L
VIN = 15 mV,
= 23 mV,
VCHG = VCC2, SW4: off, SW5: on
CPU pin sink current
VCPU-SINK
VIN1– = 15 mV, VIN1+ = 23 mV,
VCHG = VCC2, SW4: off, SW5: on
High-level BIAS1 pin
VBIAS1-H SW1, 2, 5, 6: on
VCC2 – 0.15
V
High-level BIAS2 pin
SW1, 2, 5, 6: on, VIN2- = 15 mV,
VBIAS2-H
VIN2+ = 11 mV
VCC2 – 0.15
V
Low-level BIAS2 pin leak current
IBIAS2-LK
Low-level CPU pin
SW1, 2, 5, 6: on,
VIN1– = 15 mV, VIN1+ = 23 mV
0.2
35
V
µA
10
µA
Continued on next page.
No. 5640-2/6
LA5621M, 5621V
Continued from preceding page.
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
[FET drive block]
Drive high-level voltage
VGATE-H
Same as current drain 1-1
Drive low-level voltage
VGATE-L
SW6: on, Same as current drain 1-2
5.3
5.4
0.1
V
0.2
V
[Comparator block] SW1, 2, 5, 6: on
Input offset voltage 1
VIO1
Comparator 1, when CPU voltage is reversed
–3
+2
+7
mV
Input offset voltage 2
VIO2
Comparator 2, when BIAS2 voltage is reversed
–3
–1
+1
mV
Input offset voltage 3
VIO3
Total temperature, comparator 2
–5
+3
mV
Input offset current
IIO
Comparators 1, 2
Input bias current
IIB
Comparators 1, 2
In-phase input voltage range
VICR
Comparators 1, 2
Input current during negative voltage application
ILIM
Comparators 1, 2 non-reversed input block only, SW3: on
5
–250
50
–25
nA
nA
VCC2 – 1.5
–1.5
V
mA
[Input pin block] VIN1– = 15 mV, VIN1+ = 23 mV, VIN2– = 15 mV, VIN2+ = 23 mV
CHARGE pin threshold voltage
VCHG-TH
SW1, 2, 5, 6: When on, BIAS2 voltages are reversed
CHARGE pin input bias current 1
ICHG-BI1
Current during threshold voltage
ICHG-BI2
VCHARGE = VCC2
CHARGE pin input bias current 2
CHARGE-INH pin open voltage
VCH-IN-OP SW1, 2, 5, 6: on
CHARGE-INH pin threshold voltage
VCH-IN-TH SW1, 2, 5, 6: When on, BIAS2 voltages are reversed
CHARGE-INH pin low-level input current
ICH-IN
SW1, 2, 5, 6: on
BATT/EXT pin open voltage
VBA/EX-OP SW1, 2, 6: on
BATT/EXT pin threshold voltage
VBA/EX-TH SW1, 2, 6: When on, BIAS2 voltages are reversed
BATT/EXT pin low-level input current
VBA/EX
SW1, 2, 5, 6: on
0.5
55
70
1.2
V
10
µA
85
µA
VCC2
0.7
V
1.3
–30
VCC2
1.45
–30
V
µA
V
2.05
V
µA
Handling Cautions
Observe precautions when handling these ICs because they are electrostatic sensitive devices.
Pin Assignment
No. 5640-3/6
LA5621M, 5621V
Pin Functions
Pin No.
Pin name
Function
LA5621M
LA5621V
1
1
BIAS1
Resistor connection pin for setting non-reversed input potential of comparator 1
2
2
VIN1–*
Reversed input of comparator 1 (for charge current detection)
3
3
VIN1+*
Non-reversed input of comparator 1 (for charge current detection)
4
4
CPU
5
5
BIAS2
Resistor connection pin for setting non-reversed input potential of comparator 2
6
6
VIN2–*
Reversed input of comparator 2 (for countercurrent detection when 2 batteries are used)
7
7
VIN2+*
—
8
NC
—
9
NC
8
10
GND
9
11
CHARGE
Microcontroller signal input pin
Non-reversed input of comparator 2 (for countercurrent detection when 2 batteries are used)
No connection
No connection
Substrate of this IC (Lowest potential)
Charging signal input pin, charge with low
Charge prohibition signal input pin, charge prohibition with low (becomes low during discharge mode
for lithium-ion battery that set operates on)
10
12
CHARGE INH
11
13
BATT/EXT
12
14
VCC2
13
15
GATE
Gate connection pin of external power MOSFETs
14
16
VCC1
Lithium-ion battery + side input pin
On/off control pin of this IC, except Gate block (becomes "Open" during discharge mode for
lithium-ion battery that set operates on)
Power supply input
Note: * If negative voltage is applied due to countercurrent, etc., up to 1.5 mA can be allowed.
Allowable power dissipation, Pd max — W
Specified Test Circuit
Operating temperature, Ta — °C
No. 5640-4/6
FW201 or FW203
equivalent
Charge current
Discharge current
Load
The charging conditions of the secondary battery to be used must be set according to the battery specifications.
The peripheral circuit constants must be set taking into consideration the specifications of the power MOSFETs.
Microcontroller use conditions must be carefully studied.
Application Cautions:
Countercurrent
detection
Charge
detection
Charging/
Discharge
mode
Secondary
lithium-ion
battery
Plug/SW
Clock, timer, CPU,
backup
Set, internal side
VBAT2 < < VBAT1
Power
supply for
charging
External
charge adapter
• Discharge/During set use, power MOSFETs are simply switched ON.
Countercurrent from set to adapter
VBAT2 > VBAT1
• Full charging on set side; Discharge on adapter side
→ Normal charging
• Charging following internal battery use
(OFF when plug
is inserted)
(ON when plug
is inserted)
External
wire bound
Secondary
lithium-ion
battery
LA5621M, 5621V
Equivalent Circuit Block and Sample Peripheral Circuit
No. 5640-5/6
LA5621M, 5621V
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.
This catalog provides information as of March, 2000. Specifications and information herein are subject to
change without notice.
PS No. 5640-6/6
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