SANYO LB1975 Datasheet

Ordering number : ENN6087A

21003AS (OT) / 52199RM (KI) No. 6087-1/12

Overview

The LB1975 is a three-phase brushless motor driver IC
suited for use in direct PWM driving of DC fan motors for
air conditioners, water heaters, and other similar
equipment. Since a shunt regulator circuit is built in,
single power supply operation sharing the same power
supply for the motor is supported.

Features

• Withstand voltage 45 V, output current 2.5 A

• Direct PWM drive output

• 3 built-in output top-side diodes

• Built-in current limiter

• Built-in FG output circuit

Package Dimensions

unit: mm

3147C-DIP28H

1

14

28

15

0.4

0.6

4.04.0

26.75

20.0

R1.7

8.4

(1.81)

1.78

1.0

12.7

11.2

SANYO: DIP28H

[LB1975]

LB1975

SANYO Electric Co.,Ltd. Semiconductor Company

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

DC Fan Motor Driver

Monolithic Digital IC

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.

No. 6087-2/12

LB1975

Parameter Symbol Conditions Ratings Unit

Supply voltage

V

CC

max 7 V

V

M

max 45 V

Output current I

O

max 2.5 A

Maximum input current I

REG

max V

REG

pin 10 mA

Allowable power dissipation

Pd max1 IC only 3 W

Pd max2 With infinite heat sink 20 W
Operating temperature Topr –20 to +100 °C
Storage temperature Tstg –55 to +150 °C

Specifications

Absolute Maximum Ratings at Ta = 25°C

Parameter Symbol Conditions Ratings Unit

Supply voltage range

V

CC

4.5 to 6.7 V

V

M

20 to 42 V

Input current range I

REG

V

REG

pin 1 to 5 mA

FG pin applied voltage V

FG

0 to V

CC

V

FG pin output current I

FG

0 to 10 mA

Allowable Operating Ranges at Ta = 25°C

3

0

4

8

12

16

20

24

–20 0 20 40 60 80 100 120

Allowable power dissipation, Pd max – W

Pd max – Ta

Ambient temperature, Ta – ˚C

With infinite heat sink

Independent IC

No. 6087-3/12

LB1975

Parameter Symbol Conditions

Ratings

Unit

min typ max

Supply current I

CC

10 14 18 mA

[Output Block]

V

O

sat1 (L) IO= 1.0 A, VO(sink) 1.1 1.4 V

V

O

sat1 (H) IO= 1.0 A, VO(source) 0.9 1.3 V

Output saturation voltage

V

O

sat1 IO= 1.0 A, VO(sink) + VO(source) 2.0 2.6 V

V

O

sat2 (L) IO= 2.0 A, VO(sink) 1.4 1.8 V

V

O

sat2 (H) IO= 2.0 A, VO(source) 1.2 1.7 V

V

O

sat2 IO= 2.0 A, VO(sink) + VO(source) 2.6 3.4 V

Output leak current

I

O

Leak (L) 100 µA

I

O

Leak (H) –100 µA

Upper side diode forward voltage

V

FH

1 IO= 1.0 A 1.2 1.6 V

V

FH

2 IO= 2.0 A 2.1 2.6 V

[Hall Amplifier]

Input bias current I

HB

–4 –1 µA

Common-mode input voltage range V

ICM

1.5

VCC– 1.5

V

Hall input sensitivity VH

IN

60 mVp-p

Hysteresis width ∆V

IN

(HA) 23 32 39 mV

Input voltage (low to high) V

SLH

6 16 25 mV

Input voltage (high to low) V

SHL

–25 –16 –6 mV

[FG Pin (speed pulse output)]

Output low-level voltage V

FGLIFG

= 5 mA 0.5 V

Pull-up resistor value R

FG

7.5 10 12.5 kΩ

[Current Limiter]

Limiter V

RF

0.45 0.50 0.55 V

[Thermal Shutdown]

Thermal shutdown operating temperature TSD Desigh target Value (junction temperature) 150 180 °C
Hysteresis width ∆TSD Desigh target Value (junction temperature) 40 °C

[Low-Voltage Protection]

Operating voltage V

LVSD

3.5 3.8 4.1 V

Non-operating voltage

V

LVSD

(OFF)

4.3 4.5 V

Hysteresis width ∆V

LSD

0.4 0.5 0.6 V

[PWM Oscillator]

Output high-level voltage

VOH(OSC)

2.95 3.10 3.25 V

Output low-level voltage

VOL(OSC)

1.38 1.45 1.59 V

Amplitude V

OSC

1.50 1.65 1.71 Vp-p

Ocillator frequency f

OSC

C = 2200 pF 19.6 23.0 27.6 kHz

Charge current I

CHG

–110 –94 –83 µA

Discharge resistance R

DCHG

1.6 2.1 2.6 kΩ

[V

REG

Pin]

Pin voltage V

REGIREG

= 1.5 mA 6.6 7.0 7.2 V

[V

CTL

Pin]

Input voltage

V

CTL

1 Output duty 0% 1.1 1.4 1.7 V

V

CTL

2 Output duty 100% 3.2 3.5 3.8 V

Input bias current

I

B

1 (CTL) V

CTL

= 0 V –82 µA

I

B

2 (CTL) V

CTL

= 5 V 92 µA

[V

CTL

Amplifier]

Reference voltage V

CREF

2.23 2.35 2.46 V

Output voltage

V

COUT

1 V

CTL

= 0 V 3.90 4.20 4.40 V

V

COUT

2 V

CTL

= 5 V 0.60 0.80 1.10 V

[Start/Stop Pin]

High-level input voltage range V

IH

(S/S)

VCC– 1.5

V

CC

V

Low-level input voltage range V

IL

(S/S) 0 1.5 V

Input open voltage V

IO

(S/S)

VCC– 0.5

V

CC

V

Electrical Characteristics at Ta = 25°C, VCC= 5 V, VM= 30 V

Continued on next page.

No. 6087-4/12

LB1975

Parameter Symbol Conditions

Ratings

Unit

min typ max

Hysteresis width ∆V

IN

(S/S) 0.35 0.50 0.65 V

High-level input current I

IH

(S/S) V (S/S) = V

CC

–10 0 10 µA

Low-level input current I

IL

(S/S) V (S/S) = 0 V –280 –210 µA

[Forward/Reverse Pin]

High-level input voltage range V

IH

(F/R)

VCC– 1.5

V

CC

V

Low-level input voltage range V

IL

(F/R) 0 1.5 V

Input open voltage V

IO

(F/R)

VCC– 0.5

V

CC

V

Hysteresis width ∆V

IN

(F/R) 0.35 0.50 0.65 V

High-level input current I

IH

(F/R) V (F/R) = V

CC

–10 0 10 µA

Low-level input current I

IL

(F/R) V (F/R) = 0 V –280 –210 µA

Continued from preceding page.

LB1975

V

COUT

VCCV

REG

S/S F/R (NC) OUT1 OUT2 OUT3 (NC) (NC) GND3 GND2 RF V

M

V

CTL

OSC (NC) V

CREF

IN1–IN1+IN2–IN2+IN3–IN3+FG1 FG2 GND1

1 2 3 4 5 6 7 8 9 10 11 12 13 14

28 27 26 25 24 23 22 21 20 19 18 17 16 15

Top view

A11950

Pin Assignment

Truth Table

F/R

Forward rotation Low 0 V to 1.5 V
Reverse rotation High V

CC

– 1.5 V to V

CC

FG output

Input Forward/reverse control Output FG output

IN1 IN2 IN3 F/R Source

→ Sink FG1 FG2

1 H L H

L OUT2 → OUT1

L L

H OUT1 →OUT2

2 H L L

L OUT3 → OUT1

L H

H OUT1 →OUT3

3 H H L

L OUT3 → OUT2

L L

H OUT2 →OUT3

4 L H L

L OUT1 → OUT2

H H

H OUT2 →OUT1

5 L H H

L OUT1 → OUT3

H L

H OUT3 →OUT1

6 L L H

L OUT2 → OUT3

H H

H OUT3 →OUT2

FG1
FG2