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Ordering number : ENN8797
Monolithic Digital IC
LB11972V
Overview
3-Phase Sensorless Motor Driver for Fan Motor Driver for Refrigerator
The LB11972V is a 3-phase full-wave current linear sensorless motor driver. It is optimal for refrigerator fan motor drive.
Functions
* Three-phase sensor-less motor driver * Current linear drive * Built-in current limiting circuit * Built-in output stage saturation preventive circuit * With coil counter-electromotive FG output * Built-in thermal shutdown circuit * Built-in beat lock preventive circuit
Specitications
Absolute Maximum Ratings at Ta = 25C
Parameter Supply voltage Output application voltage Input application voltage Output current Internal allowable loss Symbol
Operating temperature Storage temperature
* Specified board (114.3x76.1x1.6mm : Glass epoxy) Operating Range at Ta = 25C
Parameter Supply voltage
w
w
w
t a .D
VO max VI max IO max Pd max1 Pd max2 Topr Tstg Symbol VCC
VCC max
S a
Conditions
e h
U t4 e
.c
m o
Ratings 15.0 15.0 -0.3 to VCC+0.3 1.0 0.5 1.0 -30 to +85 -55 to +150
Unit V V V A W W C C
Independent IC Mounted on a specified board.*
Conditions
Ratings 7 to 13.8
Unit V
w
w
w
.D
a
aS t
ee h
4U t
om .c
O3005 MS PC B8-7113 No.8797-1/8
LB11972V
Electrical Characteristics at Ta = 25C, VCC = 12V
Parameter Circuit current Output saturation voltage 1 Output saturation voltage 2 MCOM pin common-phase input voltage range PCOUT output current 1 PCOUT output current 2 VCONIN input current VCO minimum frequency VCO maximum frequency C1, C2 source current ratio C1, C2 sink current ratio C1 source, sink current ratio C2 source, sink current ratio Counter-electromotive FG output ON voltage Thermal shutdown operation temperature Thermal shutdown hysteresis Current limiter operation voltage Symbol ICC VOSAT1 VOSAT2 VIC IPCOU IPCOD IVCOIN FVCOMIN FVCOMAX RSOURCE RSINK RC1 RC2 VOL TTSD TTSD VRFILIM Source side Sink side VCOIN = 5V VCOIN = open VCOIN = 5V 1- (IC1SOURCE/IC2SOURCE) 1- (IC1SINK/IC2SINK) IC1SOURCE/IC1SINK IC2SOURCE/IC2SINK IFGO = 1mA Design target value* Design target value* RL = 1k, RF = 100 0.38 150 180 15 0.44 0.50 -12 -12 50 50 0.4 210 IO = 0.4A, Source+Sink IO = 0.8A, Source+Sink, RF = 0 0 -90 90 0.1 400 18.5 +12 +12 0.2 Conditions min Ratings typ 20 1.4 1.8 max 30 2.0 2.6 VCC-2 mA V V V A A A Hz kHz % % % % V C C V Unit
Note* : These items are design target values and are not tested.
Package Dimensions
unit : mm 3315
9.75 24 13
5.6
7.6
1 0.8 (0.48) 0.3
12
0.15
1.5MAX
SANYO : SSOP24J(275mil)
0.1
(1.3)
0.5
No.8797-2/8
LB11972V
Block Diagram (The external constant may vary depending on the motor.)
No.8797-3/8
LB11972V
Pin Assignment
VOUT W OUT NC MCOM VCC UIN VIN W IN C1 C2 CX VCOIN
1 2 3 4 5 6
24 23 22 21 20 19
UOUT RF NC NC NC FC BFGO NC NC GND GND PCOUT
LB11972V
7 8 9 10 11 12 18 17 16 15 14 13
Top view
Pin Description
Pin No. 24 1 2 23 Pin Symbol UOUT VOUT W OUT RF Minimum potential of drum motor driver output transistor. Constant current control is made by detecting this voltage. The current limiter operates by detecting this potential, too. Pin Voltage Equivalent Circuit Diagram Pin Description Drum motor driver output pin
5
VCC
7 to 13.8V
Power pin
Continued on next page.
No.8797-4/8
LB11972V
Continued from preceding page.
Pin No. 4 Pin Symbol MCOM Pin Voltage Equivalent Circuit Diagram Pin Description Motor coil middle input pin. Coil voltage waveform is detected with reference to this voltage.
6
UIN
Coil waveform detection comparator input pin Connected to the output of each
7
VIN
phase via built-in resistor of 10k.
8
W IN
9
C1
Pin connected to the capacitor to generate triangular wave. This triangular wave is used for soft switching of the coil output waveform.
10
C2
11
CX
Value of the capacitor connected to this pin and GND in the VCO circuit, determining the operation frequency range and minimum operation frequency.
12
VCOIN
VCO circuit voltage input pin. Enters the PCOUT pin voltage after CR filtering
Continued on next page.
No.8797-5/8
LB11972V
Continued from preceding page.
Pin No. 13 Pin Symbol PCOUT Pin Voltage Equivalent Circuit Diagram Pin Description VCO circuit PLL output pin
14 15 18
GND BFGO
All GNDs other than the output transistor Motor couter-electromotive voltage detection FG output (single phase only)
19
FC
Frequency characteristics compensation pin Prevents oscillation of the closed loop of current control system by inserting the capacitor between this pin and GND.
No.8797-6/8
LB11972V
Sample Application Circuit (Reference)
Note 1) Note 2) Note 3) Note 4)
The constant values for capacitors, etc. are given here for reference after review by Sanyo. When reviewing this IC, adjust the value according to the motor used. If the output is not oscillated with the motor used, the capacitor provided at both ends of output coil are not necessary. Pins Nos. 6 to 8 (UIN, VIN, WIN) are not to be used by the customer. Be sure to keep these pins independent and open because they are connected inside IC. NC pins (Nos. 3, 16, 17, 20, 21, and 22) are not connected inside IC and thus can be used as relay pins.
No.8797-7/8
LB11972V
n 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.
n 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.
n 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.
n 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, of otherwise, without the prior written permission of SANYO Electric Co., Ltd.
n 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.
n 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 October, 2005. Specifications and information herein are subject to change without notice.
PS No.8797-8/8

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