SANYO LB1824 Datasheet

Overview

The LB1824 produces the direct PWM drive output
appropriate for the brushless motors used in office data
processing (OA) equipment, and integrates on a single
chip the speed control circuits, FG amplifier, and other
circuits required to form the drive circuit.

Features

• Breakdown voltage: 30 V, output current: 2.5 A

• Direct PWM drive output

• Crystal oscillator circuit

• Speed discriminator plus PLL speed control system

• Forward/reverse switching circuit

• Start/stop switching circuit

• Current control circuit

• Overheating protection circuit

• Built-in FG amplifier

• Lock detection output

Package Dimensions

unit: mm

3147A-DIP28HS

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Maximum supply voltage

V

CC

max 30 V

V

M

max 30 V

Output current I

O

max T ≤ 100 ms 2.5 A

Allowable power dissipation

Pd max1 The IC independently 3 W
Pd max2 With an arbitrary large heat sink 20 W

Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –55 to +150 °C

Allowable Operating Ranges at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage range V

CC

9.5 to 28 V

Supply voltage range V

M

9 to 28 V

FG Schmitt output, applied voltage V

FGS

0 to 8 V

I

O1

7 V output 0 to –20 mA

Fixed voltage output current I

O2

5 V output 0 to –20 mA

I

O3

4 V output 0 to –15 mA

FG Schmitt output, output current I

FGS

0 to 5 mA

Lock detection output current I

LD

0 to 20 mA

Monolithic Digital IC

Ordering number : EN4264A

93097HA (OT) / 52893TS A8-8630 No. 4264-1/9

SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters

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

Power Brushless Motor Driver

for OA Equipment

LB1824

[LB1824]

Electrical Characteristics at Ta = 25°C, VCC= VM= 24 V

Ratings

Parameter Symbol Conditions

min typ max

Unit

Current drain

I

CC1

34 50 mA

I

CC2

When stopped 8 11 mA

Output saturation voltage

V

Osat1

IO= 1A 2.0 3.0 V

V

Osat2

IO= 2A 2.7 4.2 V

Output leakage current I

Oleak

100 µA

Output voltage V

H

IO= –10 mA 6.65 7.0 7.35 V

7 V fixed voltage output Voltage variation

∆V

H1

VCC= 9.5 to 28 V 50 200 mV

Load variation ∆V

H2

IO= –5 to –20 mA 40 200 mV

Output voltage V

X

IO= –5 mA 4.45 4.80 5.15 V

5 V fixed voltage output Voltage variation ∆V

X1

VCC= 9.5 to 28 V 50 200 mV

Load variation ∆V

X2

IO= –5 to –20 mA 5 200 mV

Output voltage V

FG

IO= –5 mA 3.65 4.0 4.35 V

4 V fixed voltage output Voltage variation ∆V

FG1

V

CC

= 9.5 to 28 V 40 200 mV

Load variation ∆V

FG2

IO= –5 to –15 mA 110 200 mV

Input bias current I

HB

–4 –1 µA

Common mode input voltage range V

ICM

1.5 5.1 V

Hall amplifier

Hall input sensitivity 60 mVp-p
Hysteresis ∆V

IN

8 14 24 mV

Input voltage low → high V

SLH

7 mV

Input voltage high → low V

SHL

–7 mV

Output high level voltage V

OH(CR)

2.8 3.1 3.4 V

Oscillator

Output low level voltage V

OL(CR)

0.8 1.1 1.4 V

Oscillator frequency f

(CR)

R = 56 kΩ, C = 1000 pF 15 kHz

Amplitude V

(CR)

2.0 Vp-p

Current control operation Limiter V

CC –VM

0.4 0.5 0.6 V

Thermal shutdown operation

Thermal shutdown operating temperature

TSD Design target 150 180 °C
Hysteresis ∆TSD 50 °C
Input offset voltage V

IO(FG)

–10 +10 mV

Input bias current I

B(FG)

–1 +1 µA

Output high level voltage V

OH(FG)IFG

= –2 mA 5.5 6 V

FG amplifier

Output low level voltage V

OL(FG)

IFG= 2 mA 1 1.5 V
FG input sensitivity 100x gain 3 mV
Next stage Schmitt width 100 180 250 mV
Operating frequency range 2 kHz
Open loop gain f

(FG)

= 2 kHz 45 51 dB

FGS output

Output saturation voltage V

O(FGS)

I

O(FGS)

= 2 mA 0.1 0.5 V

Output leakage current I

L(FGS)

VO= 5 V 10 µA
Output high level voltage V

OH(D)

4.0 4.3 V

Speed discriminator Output low level voltage I

OL(D)

0.8 1.1 V

Number of counts 512

PLL output

Output high level voltage V

OH(P)

3.2 3.5 3.8 V

Output low level voltage V

OL(P)

1.2 1.5 1.8 V

Lock detection

Output low level voltage V

OL(LD)

ILD= 10 mA 0.15 0.5 V
Locking range ±6.25 %
Input bias current I

B(INT)

–0.4 +0.4 µA

Output high level voltage V

OH(INT)

3.7 4.3 V

Integrator

Output low level voltage V

OL(INT)

0.8 1.2 V
Open loop gain 60 dB
Gain-bandwidth product 1.6 MHz
Reference voltage –5% V

X

/2 5% V

Crystal oscillator Operating frequency range f

OSC

1 10 MHz

Input high level voltage V

IH(S/S)

4.0 V

Start/stop pin Input low level voltage V

IL(S/S)

1.5 V

Pull-down resistance R

D(S/S)

30 50 70 kΩ

Input high level voltage V

IH(F/R)

4.0 V

Forward/reverse pin

Input low level voltage V

IL(F/R)

1.5 V

Hysteresis ∆V

IN

0.5 V
Pull-down resistance R

D(F/R)

30 50 70 kΩ

LB1824

No. 4264-2/9

LB1824

No. 4264-3/9

Pd max – Ta

Ambient temperature Ta – °C

Allowable power dissipation, Pd max – W

Pin Assignment

Equivalent Circuit Block Diagram