Sanyo LB1857M Specifications

Monolithic Digital IC

Ordering number : EN3976A

33098HA (OT)/D111TS No. 3976-1/6

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN

Three-Phase Brushless Motor Driver IC

LB1857M

Overview

The LB1857M is a three-phase brushless motor driver IC
designed for use as a camcorder capstan or drum motor
driver, or as a digital audio tape player/recorder motor
driver.

Features

• 120° voltage linear system

• Appropriate for portable applications, since the
LB1857M reduces system power requirements by using
motor voltage control for speed control.

• Built-in torque ripple compensation circuit

• Small external capacitances due to the adoption of a soft
switching technique (chip capacitor).

• Built-in thermal shutdown circuit

• Built-in FG amplifier

Package Dimensions

unit: mm

3073A-MFP30S

SANYO: MFP30S

[LB1857M]

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

V

CC

1 max 7 V

Supply voltage V

CC

2 max 16 V

V

S

max VCC2V

Output applied voltage V

O

max VS+ 2 V

Output current I

O

max 1.5 A
Allowable power dissipation Pd max 1.0 W
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –55 to +125 °C

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

V

CC

1VCC1 ≤ VCC2 4.0 to 6.0 V

Supply voltage V

CC

2 4 to 14 V

V

S

Up to VCC2V

No. 3976-2/6

LB1857M

Electrical Characteristics at Ta = 25°C, VCC1 = 5 V, VCC2 = 7 V, VS= 3 V

Ratings

Parameter Symbol Conditions

min typ max

Unit

I

CC

1 VBR= 5 V 4.5 6.5 mA

Supply current I

CC

2 VBR= 5 V 13 20 mA

I

S

VBR= 5 V, RL= ∞ 6.5 9.0 mA

Output quiescent current

I

CCOQ

V

STBY

= 0 V 180 µA

I

SOQ

V

STBY

= 0 V, RL= ∞ 150 µA

Output saturation voltage V

O(sat)

I

OUT

= 0.6 A, sink + source 2.3 V

Output TRS withstand voltage V

O(sus)

I

OUT

= 20 mA*1 16 V

Output quiescent voltage V

OQ

VBR= 5 V 1.4 1.5 1.6 V

Hall amplifier input offset voltage V

HOFFSET

*1 –5 +5 mV

Hall amplifier common mode input

V

HCOM

1.4 2.8 V

voltage range
Hall I/O voltage gain GV

HO

Rangle = 8.2 kΩ 32.0 35.0 38.0 dB

Brake pin high level voltage V

BRH

2.0 V

Brake pin low level voltage V

BRL

0.8 V

Brake pin input current I

BRIN

100 µA

Brake pin leakage current I

BRLEAK

–30 µA

FRC pin high level voltage V

FRCH

2.8 V

FRC pin low level voltage V

FRCL

1.2 V

FRC pin input current I

FRCIN

100 µA

FRC pin leakage current I

FRCLEAK

–30 µA

Upper side residual voltage V

XH

I

OUT

= 100 mA, VCC2 = 6 V, VS= 2 V 0.32 0.49 V

Lower side residual voltage V

XL

I

OUT

= 100 mA, VCC2 = 6 V, VS= 2 V 0.39 0.48 V

Overlap level OL V

CC

2 = 6 V, VS= 3 V 60 70 80 %

Standby on voltage V

STBYL

*2 –0.2 +0.1 V

Standby off voltage V

STBYH

2 5 V

Standby pin bias current I

STBYIN

10 µA

Thermal protection circuit operating

T

TSD

*1 150 180 210 °C

temperature
Thermal protection circuit hysteresis

∆T

TSD

*1 15 °C
[FG amplifier]
Input offset voltage V

FG OFFSET

–8 +8 mV

Open loop voltage gain GV

FG

f = 1 kHz 60 dB
Source output saturation voltage V

FG OU

IO= –2 mA 3.7 V
Sink output saturation voltage V

FG OD

IO= 2 mA 1.3 V
Common mode signal exclusion ratio CHR *1 80 dB
FG amplifier common mode input

V

FG CH

0 3.5 V

voltage range
Phase margin φM *1 20 deg

Schmitt amplifier threshold voltage V

FGS SH

V

FGIN

+

= 2.5 V,

2.45 2.50 2.55 V

when V

FGOUT

2 goes from high to low

Schmitt amplifier hysteresis width V

FGS HIS

V

FGIN

+

= 2.5 V 20 40 60 mV

Note: 1. These are target settings, and are not measured. The overlap ratings are taken as test ratings without change.

2. When the standby pin is open the IC will be in the standby state.