Document
Ordering number: EN4392A
Monolithic Digital IC
LB1674V Brushless, Sensorless Motor Driver
Overview
The LB1674V is a small motor driver ideal for mini-cassettes, headphone stereos and micro-cassettes.
Package Dimensions
unit : mm
3175A-SSOP24
[LB1674V]
Functions and Features
c c c c c 3-phase unipolar, brushless, sensorless motor driver Reverse function Built-in speed control function (V servo) Built-in reference voltage (0.5 V) Soft switching driver
SANYO : SSOP24
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter Maximum supply voltage Output transistor withstand voltage Maximum output current Allowable power dissipation Operating temperature Storage temperature Symbol VCC max Vsus Im max Pd max Topr Tstg Tj = 125°C Conditions Ratings 5 10 0.6 0.4 0 to + 80 –40 to + 125 Unit V V A W °C °C
Allowable Operating Range at Ta = 25°C
Parameter Supply voltage Symbol VCC Conditions Ratings 1.0 to 3.5 Unit V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83096HA(II)/90793TS No.4392-1/6
LB1674V
Electrical Characteristics at Ta = 25°C, VCC = 1.5 V, unless otherwise noted
Parameter Supply current Reference voltage Symbol ICC START pin: high START pin: low 0.47 Conditions min typ 6.5 0 0.50 1 –0.2 –0.06 0.01 140 –5 155 170 +5 3 max 10 10 0.53 1.5 Unit mA µA V %/V mV/µA %/°C mV % %/V %/°C 100 0.27 45 0.25 0.3 65 mV ms µA V V V µA
Vref ∆Vref Reference-voltage characteristic / ∆VCC VCC = 1.0 to 3.5 V Vref Reference-voltage load characteristics Reference-voltage temperature characteristics Speed signal detection accuracy Speed signal interphase error Speed-signal voltage characteristics Speed-signal temperature characteristics Current detection accuracy Current detection ratio Starting pulse period COM* lead-in current Output saturation voltage Logic input high-level voltage Logic input low-level voltage TC pin lead-in current ∆Vref ∆Iref ∆Vref / ∆Ta Vref Vsp Iref = 0 to –50 µA Ta = 0 to 80°C VIN = 750 mV
∆Vsp / ∆VCC VCC = 1.0 to 3.5 V Vsp ∆Vsp / ∆Ta Vsp VRI KI TS ICOM* Vsat VH VL ITC VIN = 0.75 V, Ta = 0 to 80°C VIN1 = 0.3 V, VIN2 = 1.0 V, RI = 330 Ω VIN1 = 0.3 V, VIN2 = 1 to 1.3 V CS = 0.1 µF VCC = 1.0 V, Im = 0.3 A 0.9 35 70 0.17 25
2 0.05 85 0.22 32 35 0.15
50
Allowable power dissipation, Pd max – W
Pd max – Ta
Ambient temperature, Ta – °C
Pin Assignment
Top view
No.4392-2/6
LB1674V
Equivalent Circuit Block Diagram
Supply bias
Oscillator circuit
Reference voltage
Commutation and starting logic
Soft switch
Pre-driver
Start detector
Speed detector Error amplifier
Current detector
Sample Application Circuits at VCC = 1.5 V
Note: PU, PV and PW are internal operation measurement pins.
Unit (resistance: Ω, capacitance: F)
No.4392-3/6
LB1674V
Pin Description
Unit (resistance: Ω)
Pin Number 1 3 23 Pin Name V W U Equivalent Circuit Description c Motor coil connection pins
2 22 24
DW DU DV
c Power transistor base pins
4 5
GND OSC
.