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Ordering number : EN6199A
LB1877M
Monolithic Digital IC
LB1877M
Brushless Motor Driver with Speed Control for Portable Cassette Recorders
Overview
The LB1877M is a motor driver well suited for driving motors of minicassette recorders, headphone stereos, and microcasette recorders that use a 3V power supply.
Package Dimensions
unit: mm 3036B-MFP20
[LB1877M]
20 11
6.35
Functions and Features
* * * * * Brushless sensorless motor drive (3-phase half-wave drive) Forward/reverse drive possible Built-in speed control function (voltage servo) Built-in reference voltage (0.9V) Soft switching
1.8 max
12.6
1.5
0.15
0.35
1.27
0.59
0.1
SANYO : MFP20
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Maximum supply voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max IO max Pd max Topr Tstg Conditions Ratings 6.0 0.5 0.5 -10 to +80 -40 to +150 Unit V A W C C
Allowable Operating Ranges at Ta = 25C
Parameter Power supply voltage Symbol VCC Conditions Ratings 1.8 to 5.0 Unit V
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
63099RM(KI) No. 6199-1/7
0.625
1
10
5.4
7.6
LB1877M
Electrical Characteristics at Ta = 25C, VCC = 2.4V
Parameter Power supply current [S/S pin] S/S pin High level S/S pin Low level [DR pin] DR pin High level DR pin Low level [Internal reference voltage] Internal reference voltage Output current Reference voltage to power supply voltage characteristics Reference voltage to temperature characteristics [OSC pin] Charge current [COM pin] Sink current [LB pin] Charge current [VSP pin] Input voltage range Speed signal detection precision Speed signal relative precision Speed signal to power supply voltage characteristics Speed signal to temperature characteristics [IN+ pin] Input voltage range [OUT pin] Output current [RI pin] Current detection precision [U, V, WOUT pins] Output saturation voltage [Thermal] Thermal protection trigger temperature Temperature hysteresis width Symbol ICC1 ICC2 SSH SSL DRH DRL Conditions S/S pin High level S/S pin Low level (standby) Start Stop Reverse Normal direction 1.5 0 1.5 0 0.8 0.9 min Ratings typ 4.0 max 20 VCC 0.3 VCC 0.3 Unit mA A V V V V Measurement circuit 1 2 3 4 9 10 11 12 13 Target
VREF Output current 0 A IREF Output current 250 A VREF/VCC VCC = 1.8 to 5.0V IREF/Ta VCC = 2.4V
1.0 V 25 mV/250 A 5 mV/V 0.3 mV/C
- 0.1
Isc ICOM ILB VIN VCC = 2.4V VSP VIN = 1V RSP VSP/VCC VCC = 1.8 to 5.0V VSP/Ta
3.0 17 4.5 0.15 420 -6
4.5 24 6.5
6.0 33 9.0 1.8 580 6 2.5 0.2
A A A V mV % mV/V mV/C
14 15 16 17 18 Target 19 Target
500
- 0.1
VIN+ IOUT VRI Vsat TTSD TTSD
VCC = 2.4V VIN+ = 1V RI = 10 k U, V, Wout = 2.3V IO = 200 mA
0.1 25 10 30 20
VCC - 0.7 47.3 35 0.25 180 15
V A mV V C C
20 21 22 23 Target Target
Note: Items shown to be Target are not measured.
Pd max - Ta
0.8
Allowable power dissipation, Pd max - W
0.6 0.5 0.4
0.2
0 -10
0
20
40
60
80
100
Ambient temperature, Ta - C
No. 6199-2/7
LB1877M
Pin Function
Pin number Pin name 20 UOUT 1 VOUT 2 WOUT 6 UB 5 VB 4 WB 18 VCC 7 OSC 8 COM 3 P - GND 9 GND 11 S/S 19 DR 12 VREF 14 VSP 13 IN+ 15 OUT 10 RI 16 FC 17 LB Function U-phase output V-phase output W-phase output U-phase base of 3-phase differential V-phase base of 3-phase differential W-phase base of 3-phase differential Power supply Startup oscillator pin Output waveform detection comparator voltage Output transistor and predriver ground Ground pin Start/stop pin Forward/reverse pin Reference voltage 0.9V Output waveform peak detection pin Error amp non-inverted pin Error amp output pin Current feedback resistor connection pin Frequency response adjustment pin Motor start lockup prevention. Connect to GND via capacitor
Pin Assignment
VOUT WOUT PGND WB VB UB OSC COM GND
1 2 3 4 5
20 19 18 17 16
UOUT DR VCC LB FC OUT VSP IN+ VREF S/S
LB1877M
6 7 8 9 15 14 13 12 11
RI 10
Top view
No. 6199-3/7
0.1F 0.1F UB VB WB VCC
Block Diagram
0.1F
Lockup prevention
LB
Startup detection
UOUT VOUT
Predriver
0.047F
Transfer current start logic
Waveform detection
WOUT
DR
Forward/ reverse
P-GND
LB1877M
COM 10k - +
To various blocks
OSC
Oscillator
Speed control reference voltage
0.22F
Current detection
Reference voltage
VCC
To control block
Speed detection
3V GND TSD
S/S
Power supply bias VREF IN+ Vsp 100k 0.1F OUT RI 1k FC 0.47F
* Constants given in the illustration are for reference only and are not guaranteed for all motors. Individual adjustment for each motor is required.
No. 6199-4/7
LB1877M
Pin Description
Pin number Pin name Pin voltage VCC 1.8V to 5.0V 18 GND 9 12 VREF 0.7V to 0.9V Equivalent circuit Unit (resistance: , capacitance: F) Pin function Power supply for all circuits Ground for all circuits except FC and power block. Internal reference voltage. Connected as speed control voltage to IN+ pin via external resistor.
12
50k
7
OSC
1V to Vcc
7
200
Startup oscillator pin. Adjusts self-excitation frequency via external capacitor.
8
COM
1.3V to Vcc
To comparator input 10k To UOUT To VOUT To WOUT 1k 20k 20k 20k
8
20k
Determines threshold voltage of waveform detection circuit. Connected to Vcc via an external resistor. Varies the startup threshold voltage.
14
VSP
0.1V to Vcc - 0.7V
To U,V,WOUT 10k 10k 10k
Peak detection circuit output pin.
13
IN+
14
5k 200
Error amplifier non-inverted pin. Controls rotation speed via input pin voltage.
15
OUT
Drive current
I
Current feedback circuit
Error amplifier output pin. Connect external resistor between Vsp pins for feedback.
10
RI
10k 200
Current feedback output pin. Connect external resistor between this pin and ground for current feedback adjustment.
13
15
10
Continued on next page No. 6199-5/7
LB1877M
Continued from preceding page Pin number Pin name FC 16 Pin voltage Voltage input not allowed Equivalent circuit Unit (resistance: , capacitance: F) Pin function Frequency characteristics adjustment pin. Connect to ground via capacitor.
Drive current
6k To RI pin 11 S/S 0 to Vcc
3S
2k
16
Start/stop pin.
80k
50k
50k
11
19 DR 0 to Vcc Forward/reverse rotation pin.
50k
50k
19
20 1 2 UOUT VOUT WOUT 0 to 8V U, V, W phase output pins. Connect to motor coils
20 1
2
100k
17
LB
0 to 1V
Motor start lockup prevention.
17
200
3
P - GND
Power block ground.
Continued on next page
No. 6199-6/7
LB1877M
Continued from preceding page Pin number Pin name WB 4 VB 5 UB 6 Pin voltage Voltage input not allowed Equivalent circuit Pin function Base pins for U, V, W differential. Connect to ground via capacitor for soft switching
4
5
6
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 June, 1999. Specifications and information herein are subject to change without notice. PS No. 6199-7/7

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