SANYO LB1877M Datasheet

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]

5.4

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

12.6

0.35

1.27

0.15

1.8 max

1.50.1

0.59

SANYO : MFP20

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 0.5 W Operating temperature Topr –10 to +80 °C Storage temperature Tstg –40 to +150 °C

max 6.0 V

6.35

0.625

7.6

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

63099RM(KI)

No. 6199-1/7

LB1877M

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 VREF Output current 0 µA 0.8 0.9 1.0 V 11 Output current IREF Output current 250 µA 25 mV/250 µA12 Reference voltage to power supply

∆VREF/∆VCCV

= 1.8 to 5.0V 5 mV/V 13

voltage characteristics Reference voltage to temperature ∆IREF/∆Ta VCC = 2.4V – 0.1 0.3 mV/°C Target characteristics [OSC pin] Charge current Isc 3.0 4.5 6.0 µA14 [COM pin] Sink current ICOM 17 24 33 µA15 [LB pin] Charge current ILB 4.5 6.5 9.0 µA16 [VSP pin] Input voltage range VIN VCC = 2.4V 0.15 1.8 V 17 Speed signal detection precision VSP VIN = 1V 420 500 580 mV 18 Speed signal relative precision RSP – 6 6 % Target Speed signal to power supply

∆VSP/∆VCCVCC = 1.8 to 5.0V 2.5 mV/V 19 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 IOUT VIN+ = 1V 25 30 47.3 µA21 [RI pin] Current detection precision VRI 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

0.5

0.4

0.2

Pd max – Ta

Allowable power dissipation, Pd max – W

0 20406080100–10

Ambient temperature, Ta – °C

No. 6199-2/7

LB1877M

Pin Function

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

OSC

UOUT

VCC

LB1877M

COM

GND

OUT

VSP

IN+

VREF

S/S

Top view

No. 6199-3/7

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