SANYO LB1862M Datasheet

Overview

The LB1862M is a single-phase full-wave driver provided
in a miniature package that is optimal for driving
miniature fans such as CPU cooling fans. It provides
motor drive with low switching noise and high efficiency.

Functions

• Supports both 5- and 12-V power supplies.

• Allows the use of reverse connection prevention diodes
by including a regeneration circuit on chip.

• On-chip Hall amplifier with hysteresis characteristics
(Supports commutator-free cores.)

• Lock protection and automatic recovery circuits

• Lock detection pin
(Latch type – Low: drive, High: stopped)

• Supports low current drain in standby mode by
providing a Hall bias pin and a start/stop pin.

• Thermal shutdown circuit

Package Dimensions

unit: mm

3086A-MFP10S

Monolithic Digital IC

Ordering number : EN5657

73097HA(OT) No. 5657-1/6

SANYO: MFP10S

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN

Single-Phase Full-Wave Driver for Fan Motors

LB1862M

Parameter Symbol Conditions Ratings Unit

Supply voltage V

CC

max 17 V

Output current I

OUT

max 0.5 A

Output voltage V

OUT

max 15 V

RD output voltage V

R

max 15 V

RD output current I

R

max 5mA

HB output current I

B

max 10 mA

ST input voltage V

ST

max 15 V
Allowable power dissipation Pd max When mounted on the specified board * 850 mW
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Note: * Specified board: 114.3 × 76.2 × 1.5 mm epoxy glass laminate board

Parameter Symbol Conditions Ratings Unit

Supply voltage V

CC

3.8 to 16.8 V

ST input high-level voltage ST

H

3 to 14 V

ST input low-level voltage ST

L

–0.3 to +0.4 V

Hall input

V

ICM

0.2 to VCC–1.5 V

common-mode input voltage range

Allowable Operating Ranges at Ta = 25°C

[LB1862M]

No. 5657-2/6

LB1862M

Parameter Symbol Conditions

Ratings

Unit

min typ max

During drive operation (CT = low, ST = low) 6.5 9.1 mA

Current drain I

CC

During lock protection (CT = high, ST = low) 2.2 3.1 mA
Standby mode (ST = high) 110 150 µA

Lock detection capacitor charge current I

CT

1 1.9 2.8 3.7 µA

Capacitor discharge current I

CT

2 0.32 0.46 0.60 µA

Capacitor charge/discharge current ratio R

CT

RCD= ICT1/ICT2 5.0 6.0 7.0

CT charge voltage V

CT

1 2.55 2.75 2.95 V

CT discharge voltage V

CT

2 1.6 1.8 2.0 V

Output low-level voltage V

OLIO

= 200 mA 0.2 0.3 V

Output high-level voltage V

OHIO

= 200 mA 3.9 4.1 V

Hall input sensitivity V

HN

Zero peak value

7 15 mV

(Including the offset and hysteresis.)

RD output pin low-level voltage V

RDIRD

= 5 mA 0.1 0.3 V

RD output pin leakage current I

RDLVRD

= 15 V 30 µA

HB output low-level voltage V

HBLIHB

= 5 mA 1.0 1.3 V

ST pin input current I

ST

VST= 5 V 75 100 µA

Electrical Characteristics at Ta = 25°C, VCC= 5 V

Truth Table

Pin Assignment

The RD output is a latch-type output; Low: drive, High: stopped

ST IN

–

IN

+

CT OUT1 OUT2 RD HB Mode

H — — — off off off off Standby

H L

L

H L

L L Drive

L L H L H

H off off off L Lock protection

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