SANYO LB1868M Datasheet

Ordering number : ENN6203

LB1868M

Monolithic Digital IC

LB1868M

Two-Phase Brushless Fan Motor Driver

Overview

The LB1868M is a 2-phase unipolar brushless motor
driver. With only a few peripheral parts, lockup protection
and automatic recovery can be implemented. The IC can
be configured for 12V or 24V operation and a wide range
of variations, from LOW speed to H-High speed and from
60 cm to 120 cm square using the same PCB. This makes
it easy to design highly reliable fan motor installations.

Functions and Features

• Output protection Zener diode with variable withstand
voltage
Z1, Z2 pins open: V
Z1, Z2 pins shorted: V
External Zener diode connected between Z1 and V
pins: support for fans with large drive current

• External resistor allows configuration for 12V or 24V.

• Direct Hall element connection possible (built-in Hall
amplifier with hysteresis supports core without auxiliary
electrode)

• Built-in output transistor with 1.0A output current
(strengthened negative-current support for core without
auxiliary electrode)

• Built-in rotation detection function:
Low during rotation and High during stop

• Built-in lockup protection with automatic recovery

• ST pin for motor stop/drive (for standby mode of copiers
etc.)

• FG output pin for rotation detection

• BC pin for kickback noise reduction (with 2 external
capacitors)

• Built-in thermal shutdown

= 57V (24V specification)

OLM

= 32V (12V specification)

OLM

CC

Package Dimensions

unit: mm

3111-MFP14S

[LB1868M]

14

1

8.0

1.0

0.35

8

4.4

7

1.8max

1.50.1

1.0

0.625

6.4

5.15

0.15

SANYO : MFP14S

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

83100RM(KI)

No. 6203-1/5

LB1868M

Specifications

Absolute Maximum Ratings at Ta = 25˚C

Parameter Symbol Conditions Ratings Unit
Maximum input current ICC max t ≤ 20 ms 200 mA
Maximum applied output voltage V
Maximum output current I
Current flowing into RD, FG IRD max 10 mA
RD, FG applied voltage VRD max 30 V
ST applied voltage VST max 7.5 V
Allowable power dissipation Pd max *With specified substrate 800 mW
Operating temperature Topr –30 to +80 °C
Storage temperature Tstg –55 to +150 °C

*Printed circuit board: 20 × 15 × 1.5 mm3 glass epoxy

max Internal V

OUT

max 1.0 A

OUT

0.9

With 20 × 15 × 1.5 mm3 glass epoxy

0.8

0.7

0.6

0.5

0.4

0.3

0.2

Allowable power dissipation, Pd max – W

0.1

0

Pd max – Ta

100806040200–20–30

Ambient temperature, Ta – °C

Allowable Operating Ranges at Ta = 25˚C

Parameter Symbol Conditions Ratings Unit
Input voltage range I

CC

Common mode input voltage range VICM 0.2 to VIN–1.5 V
ST High voltage VSTH 4.5 to 7.0 V
ST Low voltage VSTL 0 to 0.5 V

6.0 to 50 mA

Electrical Characteristics at Ta = 25˚C, Icc = 10 mA

Parameter Symbol Conditions
Output limiter withstand voltage V

1 Z1, Z2 open 54 57 60 V

OLM

V

2 Z1, Z2 short 31 33 35 V

OLM

Output saturation voltage Vosat 1 Io = 0.5A 0.95 1.2 V

2 Io = 1.0A 0.15 1.5 V
VIN voltage V
Hall input sensitivity (at zero peak) V

ICC = 7.0 mA 6.4 6.7 7.0 V

IN

Including offset and hysteresis 20 mV

HN

RD, FG output saturation voltage VRDsat IRD = 5 mA 0.1 0.3 V
CT drain current IC1 C = GND 2.7 3.8 4.9 µA
CT discharge current IC2 C = VIN 0.19 0.30 0.41 µA
Comp input threshold voltage VTH1 0.77

VTH2 0.42
ST input current I
Thermal protection circuit operating
temperature

TSD Design target value* 180 °C

VST = 5V 80 120 µA

ST

Thermal protection circuit hysteresis ∆TSD Design target value* 40 °C

* Design target values are not measured.

Ratings

min typ max

0.8V

0.45V

IN
IN

0.83 V

0.48 V

Unit

No. 6203-2/5