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Ordering number : ENN6189
LB1965M
Monolithic Digital IC
LB1965M
Two-Phase Unipolar Driver
for Variable-Speed Fan Motor
Features
• With only a few peripheral parts including a thermistor,
ambient temperature dependent continuous speed control
can be implemented. This allows low-speed startup
(100% duty drive at startup).
• Settable minimum rotation speed for low temperature
• Built-in thermistor voltage amplification circuit assures
high precision of ambient temperature to rotation speed
ratio
• Built-in motor lockup protection and automatic recovery
circuit
Output current Io = 1.5A, built-in output stage protection
Zener diode
–> Low-noise protection with chip capacitors also
possible
• Built-in thermal protection
• FG output
• Direct Hall element connection possible
Package Dimensions
unit: mm
3111-MFP14S
[LB1965M]
14
1
8.0
0.35
1.0
8
4.4
7
1.0
0.15
1.8max
1.50.1
SANYO : MFP14S
0.625
5.15
6.4
Specifications
Absolute Maximum Ratings at Ta = 25˚C
Parameter Symbol Conditions Ratings Unit
Maximum input current ICC max t ≤ 20 ms 200 mA
Maximum applied output voltage VOUT max Internal V
Maximum output current I out max 1.5 A
Current flowing into FG IRD max 10 mA
FG applied voltage VRD max 50 V
Allowable power dissipation Pd max Mounted on a specified PCB 0.8 W
(114.3 × 76.1 × 1.5 mm3 glass epoxy)
Operating temperature Topr –30 to +85 °C
Storage temperature Tstg –55 to +150 °C
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
83100RM(KI)
No. 6189-1/6
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LB1965M
412
0
3
Allowable Operating Ranges at Ta = 25˚C
Parameter Symbol Conditions Ratings Unit
Input current range ICC 6.0 to 50 mA
Hall amplifier common mode input VICM 0 to VIN–1.5 V
voltage range
RMI input voltage range VRMI 0.3 to VIN V
Rth input voltage range VICM 0 to VIN–1 V
Electrical Characteristics at Ta = 25˚C, ICC = 10 mA
Parameter Symbol Conditions
Output limiter voltage VoLM1 Io = 0.1A 30 32 34 V
Vosat1 Io = 0.5A 0.95 1.2 V
Output saturation voltage Vosat2 Io = 1.0A 1.15 1.5 V
Vosat3 Io = 1.5A 1.4 2.0 V
Input voltage VIN Icc = 7.0 mA 6.4 6.7 7.0 V
Amplifier input offset voltage VOFF –7.0 0 7.0 mV
Amplifier input bias current IBA –250 nA
FG output saturation voltage VFG(sat) IFG = 5 mA 0.15 0.3 V
C charge voltage IC1 C = GND 2.7 3.9 5.0 µA
C discharge voltage IC2 C = VIN 0.35 0.50 0.65 µA
Comp input threshold voltage VTH1 0.77 0.8VIN 0.83 V
VTH2 0.42 0.45VIN 0.48 V
Ct discharge voltage VCT 0.20 0.22VIN 0.24 V
Rt input current Irt VRT = GND 1 3 µA
VRt amplification VRt RT = OPEN 1.52 1.56 1.60 times
RMI offset voltage VRMIoff –7 0 +7 mA
Thermal protection operating voltage TSD Design target value* 150 180 210 ˚C
* Design target values are not measured.
Ratings
min typ max
Unit
1000
Specified substrate (114.3 × 76.1 × 1.5 mm3) glass epoxy
800
600
400
200
Allowable power dissipation, Pd max – mW
0
–30 0 30 60 85 90 120
Pd max – Ta
416
Ambient temperature, Ta – °C
Pin Assignment
1
FG
VIN
NC
IN–
1 2
111
Ct
Rth
LB1965M
CR
IN+
3 4
1
9 8
RMI
OUT2
B1
OUT1
5 6 7
B2
GND
(Top View)
No. 6189-2/6
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LB1965M
Truth Table
+
IN
H L H L H L H L L Full speed
L H H L H L L H H Full speed
H L H H L L H L L Minimum speed
L H H H L L L H H Minimum speed
– – L H H L H H – Low speed
– – – – – H H H – Lockup protection
Sample Application Circuit
12V
IN
–
Ct Rt RMI CR OUT1 OUT2 FG Mode
R4
18k
R5
39k
R3
30k
TH
10k
R2
470k
D1 R1
R6
2k
H
0.022µ
C2
IN–
IN+
VIN
Ct
390
Rth
FG
RMI
C3
B1
OUT1
OUT2
B2
GND
CR
C1
0.47µ
Unit(resistance: Ω, capacitance: F)
C4
Noise absorption
capacitor
0.01 to 0.047µF
The above circuit is an example for ambient temperature based speed control using a thermistor.
The thermistor voltage (Rth pin voltage) is multiplied internally by 1.6 and compared to the
voltage at the Ct pin. With the above settings and at Ta = 25˚C, the Rth pin voltage is interrupted
for the interval t off as defined by the equation below. At Ta = 45˚C, because the Rth pin voltage
× 1.6 becomes less than Vct (=1.5V), there is no cut-off interval and the motor is driven with a
duty ratio of 100%. At low temperatures, the thermistor voltage (Rth × 1.6) will rise, but
minimum rotation speed is maintained to a value defined by the RMI pin voltage. Therefore
minimum rotation speed at temperatures below Ta = 25˚C is constant.
VIN–VRth × 1.6
t = –C2⋅R2⋅In ( )
VIN–VCt
No. 6189-3/6
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Output Timing Chart
Hall input
Discharge
pulse
LB1965M
Low temperature
Ct voltage
GND
Output off
signal
OUT1
current
OUT2
current
FG output
VIN
To
Toff
×1.6 times circuit
Ton
High temperature
Timing comparator
VRMI
VRth
×
1.6
(=1.5V)
VCt
Full-phase ON
waveform
Controlled
waveform
GND
Rth
0.6r
r
RMI
Ct
To output
Discharge pulse
No. 6189-4/6
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Block Diagram
LB1965M
D1
L1
0.47 to 10
R1
R6
C1
µF
IN+
H
VIN
IN–
CR
14
3
2
4
AMP
Constant
Charge/
Discharge
Thermal
Protect
Control
Block
13
6
5
8
9
B1
OUT1
L2
B2
OUT2
FG
R2
C2
VIN
Ct
12
R3
×1.6
11 10
Rth
OUTPUT-Timing-Control
RMI
R4
R5TH1
GND
7
Unit(resistance: Ω, capacitance: F)
No. 6189-5/6
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LB1965M
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 August, 2000. Specifications and information herein are subject to change
without notice.
PS
No. 6189-6/6
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