Datasheet LB1877V Datasheet (SANYO)

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Page 1

Ordering number : ENN6200A

LB1877V

Monolithic Digital IC

LB1877V

Brushless Motor Driver with Speed Control

for Portable Cassette Recorders

Overview

The LB1877V 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

3179A-SSOP20

[LB1877V]

4.4

1.0

6.4

Functions and Features

0.5

• 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

110

6.7

0.650.22 0.43

0.15

1.6max

0.1

SANYO : SSOP20

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Maximum supply voltage V Maximum output current IO max 0.5 A Allowable power dissipation Pd max 0.35 W Operating temperature Topr –10 to +80 °C Storage temperature Tstg –40 to +150 °C

max 6.0 V

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit Power supply voltage 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

1.8 to 5.0 V

80699RM(KI)

No. 6200-1/7

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LB1877V

Electrical Characteristics at Ta = 25°C, VCC = 2.4V

Parameter Symbol Conditions

Ratings

min typ max circuit

Unit

Power supply current ICC1 S/S pin High level 4.0 mA 1

ICC2 S/S pin Low level (standby) 20 µA2 [S/S pin] S/S pin High level SSH Start 1.5 V

S/S pin Low level SSL Stop 0 0.3 V 4 [DR pin] DR pin High level DRH Reverse 1.5 V

DR pin Low level DRL Normal direction 0 0.3 V 10 [Internal reference voltage] Internal reference voltage V Output current I Reference voltage to power supply

∆V

REF

Output current 0 µA 0.8 0.9 1.0 V 11

REF

Output current 250 µA 25 mV/250 µA12

/∆VCCVCC 1.8 to 5.0V 5 mV/V 13 voltage characteristics Reference voltage to temperature ∆I

/∆Ta VCC 2.4V – 0.1 +0.3 mV/°C Target

REF

characteristics [OSC pin] Charge current Isc 3.0 4.5 6.0 µA14 [COM pin] Sink current I

COM

17 24 33 µA15 [LB pin] Charge current I

4.5 6.5 9.0 µA16 [VSP pin] Input voltage range V Speed signal detection precision V Speed signal relative precision R Speed signal to power supply

∆VSP/∆VCCVCC 1.8 to 5.0V 2.5 mV/V 19

VCC = 2.4V 0.15 1.8 V 17

VIN = 1V 420 500 580 mV 18

SP SP

– 6 +6 % Target

voltage characteristics Speed signal to temperature ∆VSP/∆Ta – 0.1 +0.2 mV/°C Target characteristics [IN+ pin] Input voltage range VIN+VCC = 2.4V 0.1

VCC – 0.7 [OUT pin] Output current I

OUT

VIN+ = 1V 25 30 47.3 µA21 [RI pin] Current detection precision V

RI = 10 kΩ U, V, Wout = 2.3V 10 20 35 mV 22

[U, V, WOUT pins] Output saturation voltage Vsat IO = 200 mA 0.25 V 23 [Thermal] Thermal protection trigger temperature

TTSD 180 °C Target

Temperature hysteresis width ∆TTSD 15 °C Target Note: Items shown to be “Target” are not measured.

Measurement

V20

0.8

0.6

0.4

0.35

0.2

Pd max – Ta

Allowable power dissipation, Pd max – W

0 –10 0 20 40 60 80 100

Ambient temperature, Ta – °C

No. 6200-2/7

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LB1877V

Pin Description

Pin number Pin name Function

20 UOUT U-phase output

1 VOUT V-phase output 2 WOUT W-phase output 6 UB U-phase base of 3-phase differential 5 VB V-phase base of 3-phase differential 4 WB W-phase base of 3-phase differential

18 VCC Power supply

7 OSC Startup oscillator pin 8 COM Output waveform detection comparator voltage 3 P – GND Output transistor and predriver ground

9 GND Ground pin 11 S/S Start/stop pin 19 DR Forward/reverse pin 12 VREF Reference voltage 0.9V 14 VSP Output waveform peak detection pin 13 IN+ Error amp non-inverted pin 15 OUT Error amp output pin 10 RI Current feedback resistor connection pin 16 FC Frequency response adjustment pin 17 LB Motor start lockup prevention. Connect to GND via capacitor

Pin Assignment

VOUT

WOUT

PGND

LB1877V

UB OUT

OSC

COM

GND

UOUT

VCC

VSP

IN+

VREF

Top view

S/S

No. 6200-3/7

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Block Diagram

Startup

detection

Waveform

detection

Oscillator

Speed control

reference voltage

Reference

voltage

Power supply

bias

Speed detection

Current

detection

To control block

To various blocks

WBVB

0.1µF 0.1µF

0.1µF

VCC

UOUT

VOUT

WOUT

GND

10kΩ

COM

Vcc

RIOUT

0.47µF

0.1µF

1kΩ

100kΩ

Vsp

IN+VREF

S/S

OSC

P-GND

Forward/

reverse

TSD

0.047µF

0.23µF

* Constants given in the illustration are for reference only and are not guaranteed for all motors.

Individual adjustment for each motor is required.

–

Lockup

prevention

Transfer current

start logic

Predriver

LB1877V

No. 6200-4/7

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LB1877V

Pin Description Unit (Resistance: Ω, capacitance: F)

Pin number

Pin name

VCC GND

VREF

Pin voltage

1.8V to 5.0V

0.7V to 0.9V

Equivalent circuit

50k

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.

OSC

COM

VSP

1V to Vcc

1.3V to Vcc

0.1V to Vcc – 0.7V

To comparator input

To UOUT

To VOUT

20k

10k

To WOUT

20k

To U,V,WOUT

10k 10k 10k

200

1k 20k

Startup oscillator pin. Adjusts self-excitation frequency via external capacitor.

Determines threshold voltage of waveform detection circuit. Connected to Vcc via an external resistor. Varies the startup threshold voltage.

Peak detection circuit output pin.

IN+

OUT

200

2005k

Drive current

10k

Current feedback circuit

101513

Error amplifier non-inverted pin. Controls rotation speed via input pin voltage.

Error amplifier output pin. Connect external resistor between Vsp pins for feedback.

Current feedback output pin. Connect external resistor between this pin and ground for current feedback adjustment.

Continued on next page

No. 6200-5/7

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LB1877V

Continued from preceding page Unit (Resistance: Ω, capacitance: F) Pin number

Pin name

Pin voltage

Voltage

input not

allowed

Equivalent circuit

Drive current

Pin function Frequency characteristics adjustment pin. Connect to ground via capacitor.

Start/stop pin.

80k

50k50k

S/S

To RI pin

0 to Vcc

Forward/reverse rotation pin.

50k50k

UOUT

VOUT

0 to 8V

20 1 2

U, V, W phase output pins. Connect to motor coils

WOUT

100k

0 to 1V

Motor start lockup prevention.

200

P – GND

Power block ground.

Continued on next page

No. 6200-6/7

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Continued from preceding page

Pin number

4 5 6

Pin name

VB UB

Pin voltage

Voltage

input not

allowed

LB1877V

Equivalent circuit

4 5 6

Pin function Base pins for U, V, W differential. Connect to ground via capacitor for soft switching

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, 1999. Specifications and information herein are subject to change without notice.

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