TB6561FG,8,EL Datasheet TB6561FG,8,EL | P4-P6

TB6561FG

2010-08-17

4

Electrical Characteristics

(V

CC

=

24 V, T

a

=

25°C)

Characteristics Symbol

Test

Circuit

Test Condition Min Typ. Max Unit

I

CC1

Stop mode ⎯ 5.5 10

I

CC2

Forward/Reverse mode ⎯ 5.0 9

I

CC3

Short brake mode ⎯ 5.5 10

Supply current

I

CC4

⎯

Standby mode ⎯ 1.5 3

mA

V

INH

⎯ 2.3 ⎯ 5.5

Input voltage

V

INL

⎯

⎯ −0.2 ⎯ 0.8

Hysteresis voltage V

IN (HYS)

⎯ (Design guarantee) ⎯ 0.4 ⎯

V

I

INH

V

IN

= 5 V 30 50 75

Control

circuit

Input current

I

INL

⎯

V

IN

= 0 V ⎯ ⎯ 5

μA

V

PWMH

⎯ 2.3 ⎯ 5.5

Input voltage

V

PWML

⎯

⎯ −0.2 ⎯ 0.8

Hysteresis voltage

V

PWM (HYS)

⎯ (Design guarantee) ⎯ 0.4 ⎯

V

I

PWMH

V

PWM

= 5 V 30 50 75

Input current

I

PWML

⎯

V

PWM

= 0 V ⎯ ⎯ 5

μA

PWM frequency

f

PWM

Duty: 50 % ⎯ ⎯ 100 kHz

PWM input

circuit

Minimum clock pulse

width

t

w(PWM)

⎯

⎯ 2.0 ⎯ ⎯ μs

V

INSH

⎯ 2.3 ⎯ 5.5

Input voltage

V

INSL

⎯

⎯ −0.2 ⎯ 0.8

Hysteresis voltage

V

IN (HYS)

⎯ (Design guarantee) ⎯ 0.4 ⎯

V

I

INSH

V

IN

= 5 V 30 50 75

Standby

circuit

Input current

I

INSL

⎯

V

IN

= 0 V ⎯ ⎯ 5

μA

I

O

= 0.2 A ⎯ 1.5 2.0

Output ON resistance R

on (U+L)

⎯

I

O

= 1.5 A ⎯ 1.5 2.0

Ω

I

L (U)

V

CC

= 40 V ⎯ ⎯ 10

Output leakage current

I

L (L)

⎯

V

CC

= 40 V ⎯

⎯

10

μA

V

F (U)

I

O

= 1.5 A ⎯ 1.3 2.0

Diode forward voltage

V

F (L)

⎯

I

O

= 1.5 A ⎯ 1.3 2.0

V

Internal reference voltage V

reg

⎯ I

reg

= 1mA 4.75

5

5.25 V

V

CLD(H)

⎯ 4.25 ⎯ V

reg

Output signal of current limiter

detection

V

CLD(L)

⎯

I

O

= 50μA

⎯ ⎯ 0.5

V

Offset time for current limiter I

SD (OFF)

⎯ (Design guarantee) ⎯

50

⎯ μs

Thermal shutdown circuit operating

temperature

T

SD

⎯ (Design guarantee) ⎯ 160 ⎯ °C

TB6561FG

2010-08-17

5

Input/Output Function

Input Output

IN1 IN2 SB PWM OUT1 OUT2 Mode

H H H

H

L

L L Short brake

L H H

H

L

H

L

CW/CCW

Short brake

H L H

H

L

H

L

CCW/CW

Short brake

L L H

H

L

OFF

(high-impedance)

Stop

H/L H/L L

H

L

OFF

(high-impedance)

Standby

Current Limiter Detection Circuit (CLD)

The CLD pin outputs the states of the current limiter and thermal shutdown circuits. If the current limiter

for either channel A or B or the thermal shutdown circuit (shared for both channels) operates, the CLD pin

state changes from low (normal state) to high.

The CLD circuit supports automatic recovery; its output returns to low once the current decreases to a

value below the limit or once the thermal shutdown state is released.

Mode CLD Output

Under TSD operation and

current detection

H

Normal L

＜When current limiter operated＞

I

LIM

50 μs

(typ.)

0

10 μs

(typ.)

Not detected

50 μs

(typ.)

10 μs

(typ.)

Output current

CLD output

H

L

OFF time

160°C (typ.)

Chip temperature

CLD output

H

L

120°C (typ.)

TSD

TB6561FG

2010-08-17

6

• PWM control function

Applying a PWM signal of 0/5 V to the PWM pin allows motor speed control.

The IC enters CW (CCW) mode and short brake mode alternately in PWM current control.

To prevent shoot-through current caused by simultaneous conduction of upper and lower transistors in

the output stage, a dead time is internally generated for 300 ns (target spec) when switching the upper

and lower transistors.

Therefore, synchronous rectification for high efficiency in PWM current control can be achieved without

an off-time that is generated via an external input.

Even when toggling between CW and CCW modes, and CW (CCW) and short brake modes, the off-time

is not required due to the internally generated dead time.

Thermal Shutdown Circuit (TSD)

The IC incorporates a thermal shutdown circuit. When the junction temperature (T

j

) reaches 160°C (typ.), the

output transistors are turned off.

After 50 μs (typ.), the output transistors are turned on automatically.

The IC has 40°C of temperature hysteresis.

T

SD

= 160°C (target spec)

ΔT

SD

= 40°C (target spec)

P-GND

V

CC

Output voltage

waveform

(OUT1)

t1

t2

t3

t5

t4

V

CC

M

P-GND

PWM ON

t1

OUT1

PWM ON

t5

V

CC

M

OUT1

P-GND

V

CC

M

PWM ON → OFF

t2 = 500 ns (typ.)

OUT1

P-GND

V

CC

M

PWM OFF

t3

OUT1

P-GND

V

CC

M

PWM OFF → ON

t4 = 500 ns (typ.)

OUT1

P-GND

TB6561FG,8,EL

TB6561FG,8,EL

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