Ordering number : ENN6489
83000RM (OT) No. 6489-1/5
Overview
The LA5645M is a constant-voltage/constant-current
control IC that incorporates low-voltage operational
amplifiers and a high-precision reference voltage circuit
(V
REF
= 1.5 V 1.0%). This device is optimal for use as a
secondary side controller in battery chargers, switching
regulators, and similar products.
Features
Operating supply voltage: 2.5 to 14 V
High-precision reference voltage: 1.5 V 1.0%
PC pin current: 60 mA (max)
Current drain: 3 mA (max)
Input offset voltage: 2 mV (max)
Package Dimensions
unit: mm
3032B-MFP8
1
8
4
5
0.645
1.27
0.35
5.1
0.15
1.8max
1.5
0.1
0.625
4.4
5.15
6.4
SANYO: MFP8
[LA5645M]
LA5645M
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Constant-Voltage/Constant-Current Control IC
Monolithic Linear IC
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
14.5
V
Differential input voltage
V
ID
max
14.5
V
PC pin current
I
PC
max
60
mA
Allowable power dissipation
Pd max
Independent IC
300
mW
Mounted on the specified printed circuit board
*
800
mW
Operating temperature
Topr
40 to +85
C
Storage temperature
Tstg
50 to +150
C
Note:
*
Specified printed circuit board: 76.1
114.3
1.6 mm
3
, glass epoxy board.
Specifications
Maximum Ratings
at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Recommended supply voltage
Vopr
2.5 to 14
V
Operating Conditions
at Ta = 25C
No. 6489-2/5
LA5645M
0.2
0.0
0.3
0.4
0.6
0.8
1.0
20
0
20
40
60
80
100
Pd max -- Ta
0.16
0.41
Parameter
Symbol
Conditions
Ratings
Unit
min
typ
max
Current drain
I
CC
I
PC
= OFF
1
3
mA
Leakage current
I
PC
LEAK
V
CC
= V
PC
= 14 V
100
A
Saturation voltage
V
PC
(sat)
I
PC
= 50 mA
0.5
0.7
V
Reference voltage
V
REF
I
REF
= 0 mA
1485
1500
1515
mV
Reference voltage regulation
V
REF
/
I
REF
I
REF
= 0 to 5 mA
30
mV
[Amplifier Block] (Characteristics common to both channels A and B)
Input offset voltage
V
IO
0.5
2
mV
Input offset current
I
IO
5
50
nA
Input bias current
I
B
80
250
nA
Voltage gain
A
V
Open loop gain (design guarantee
*
)
80
dB
Common-mode input voltage range
V
ICM
0
V
CC
2
V
Slew rate
SR
Design guarantee
*
0.8
V/s
Gain-bandwidth product
GB
Design guarantee
*
2
MHz
Electrical Characteristics
at Ta = 25C, V
CC
= 5 V
Note:
*
Design guarantee value. These parameters are not measured.
Allowable power dissipation, Pdmax -- W
Ambient temperature, Ta -- C
Mounted on the specified
printed circuit board
Independent IC
Board size: 76.1
114.3
1.6 mm
3
Board material: glass epoxy
Pin Assignment
1
PC
AINPUT
A+INPUT
GND
8
2
A
+
7
VREF
3
6
4
5
B+INPUT
BINPUT
VREF
VCC
B
+
A13183
No. 6489-3/5
LA5645M
600
400
800
1000
1200
50
0
50
100
150
0
5
10
15
200
0
400
600
800
1000
1200
1.2
1.0
1.4
1.6
1.8
2.0
0
10
20
30
1.30
1.35
1.25
1.40
1.45
1.50
1.55
0
5
10
15
3
2
1
0
1
2
3
50
0
50
100
150
1.490
1.488
1.486
1.492
1.494
1.496
1.498
1.500
50
0
50
100
150
V
REF
-- I
REF
I
CC
-- Ta
I
CC
-- V
CC
V
REF
-- V
CC
V
IO
-- Ta
V
REF
-- Ta
Channel A offset
Channel B offset
V
CC
= 5 V
V
CC
= 5 V
V
CC
= 5 V
V
CC
= 5 V
Ta = 25
C
Ta = 25
C
Ta = 25
C
Current drain, I
CC
--
A
Current drain, I
CC
--
A
Ambient temperature, Ta -- C
Supply voltage, V
CC
-- C
Reference voltage, V
REF
-- V
Input offset voltage, V
IO
-- mV
Reference voltage, V
REF
-- V
Reference voltage, V
REF
-- V
Pin 7 output current, I
REF
-- mA
Supply voltage, V
CC
-- V
Ambient temperature, Ta -- C
Ambient temperature, Ta -- C
30
40
70
20
50
60
80
90
100
50
0
50
100
150
50
0
50
100
150
8
6
4
2
0
2
4
6
8
20
40
0
20
40
60
80
100
180
0
180
180
0
180
20
40
0
20
40
60
80
100
1k
2
3 5 7
2
3 5 7
2
3 5 71M
10M
2
3 5 7
10k
100k
1k
2
3 5 7
2
3 5 7
2
3 5 71M
10M
2
3 5 7
10k
100k
Channel B
Channel A
Channel B
Channel A
I
B
-- Ta
I
IO
-- Ta
V
CC
= 5 V
Ta = 25
C
Channel A Amp
100 k
/1 k
V
CC
= 5 V
Ta = 25
C
Channel B Amp
100 k
/1 k
Phase
Phase
Gain
Gain
V
CC
= 5 V
V
CC
= 5 V
No. 6489-4/5
LA5645M
0
100
200
300
400
500
600
50
0
50
100
V
PC
(sat) -- Ta
V
PC
(sat) -- I
PC
100
50
0
150
200
250
300
350
0
20
40
60
80
V
CC
= 5 V
I
PC
= 50 mA
V
CC
= 5 V
Ta = 25
C
Output saturation voltage, V
PC
(sat) -- mV
Input bias current, I
B
-- nA
Output saturation voltage, V
PC
(sat) -- mV
Input offset current, I
IO
-- nA
Pin PC current, I
PC
-- mA
Ambient temperature, Ta -- C
Ambient temperature, Ta -- C
Ambient temperature, Ta -- C
Voltage gain, V
G
-- dB
Voltage gain, V
G
-- dB
Frequency, f -- Hz
Frequency, f -- Hz
External resistor ratio
External resistor ratio
Channel A Voltage Gain and Phase vs. Frequency
Channel B Voltage Gain and Phase vs. Frequency
Phase, -- degrees
Phase, -- degrees
PS No. 6489-5/5
LA5645M
Sample Application Circuit
This catalog provides information as of August, 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.
+
CONTROL IC
VREF=1.5V
1%
VI
PC
PC (PHOTO COUPLER)
+
2
A
R1
R3
R2
RSC
R4
R5
R6
Battery
3
+
5
1
LA5645M
8
B
6
7
4
A13184
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