TOSHIBA TB6551F Technical data

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TOSHIBA Bi-CM OS Integrated Circ uit Silicon Monolithic

TB6551F

3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller

Features

· Sine-wave PWM control

· Built-in triangular-wave generator

(carrier cycle = f

· Built-in lead angle control function (0° to 58° in 32 steps)

· Built-in dead time function (setting 2.6 µs or 3.8 µs)

· Supports bootstrap circuit

· Overcurrent protection signal input pin

· Built-in regulator (V

· Operating supply voltage range: V

/252 (Hz))

osc

= 5 V (typ.), 30 mA (max))

ref

CC

= 6 V to 10 V

Weight: 0.33 g (typ.)

TB6551F

1

2002-12-24

TB6551F

2002-12-24

V

Y

W

Td
10

Comparator

U

5

8

6

9

time

dead

Setting

Comparator

Comparator

Z
4

7

Switching

120°/180°

120/180

V

U

Phase

Phase

W

Phase

and

gate

Charger

OS
12

block

protection

HUHVHW

PWM

on/off

120°-

matrix

turn-on

LA

23

6-bit triangular

wave generator

Data

select

Comparator

2

Output

4 bits

Counter

5-bit AD

generator

System clock

Position detector

generator

waveform

Phase

matching

voltage

Internal

reference

Regulator

Rotating

direction

FG

Power-on

ST/SP

CW/CCW

ERR

GB

&

reset

Protection

reset

Block Diagram

1

V

CC

3

13

24

refout

V

S-GND

P-GND

14

15

21

20

19

22

in

out

X

HV

HU

X

HW

e

V

11

RES

3

18

17

16

dc

I

FG

REV

CW/CCW

Pin Description

Pin No. Symbol Description Remarks

TB6551F

21 HU

20 HV

19 HW

18 CW/CCW

11 RES Reset-signal-input pin

22 Ve

23 LA

12 OS

3 Idc

14 Xin Inputs clock signal
15 X

24 V

17 FG FG signal output pin Outputs 3PPR of positional signal

16 REV

9 U Outputs turn-on signal
8 V Outputs turn-on signal
7 W Outputs turn-on signal
6 X Outputs turn-on signal
5 Y Outputs turn-on signal
4 Z Outputs turn-on signal
1 VCC Power supply voltage pin VCC = 6 V~10 V

10 Td Inputs setting dead time L: 3.8 ms , H or Open: 2.6 ms

2 P-GND Ground for power supply Ground pin

13 S-GND Ground for signals Ground pin

refout

Positional signal
input pin U

Positional signal
input pin V

Positional signal
input pin W

Rotation direction
signal input pin

Inputs voltage instruction
signal

Lead angle setting signal
input pin

Inputs output logic select
signal

Inputs overcurrent­protection-signal

Outputs clock signal

out

Outputs reference voltage
signal

Reverse rotation detection
signal

When positional signal is HHH or LLL, gate block
protection operates.

With built-in pull-up resistor

L: Forward
H: Reverse
L: Reset (Output is non-active)
Operation/Halt operation
Also used for gate block protection

With built-in pull-down resistor

Sets 0° to 58° in 32 steps

L: Active low
H: Active high
Inputs DC link current.
Reference voltage: 0.5 V
With built-in filter (

With built-in feedback resistor

5 V (typ.), 30 mA (max)

Detects reverse rotation.

Select active high or active low using the output logic select pin.

~

-

1 ms)

3

2002-12-24

Input/Output Equivalent Circuits

Pin Description Symbol Input/Output Signal Input/Output Internal Circuit

TB6551F

Positional signal input pin U

Positional signal input pin V

Positional signal input pin W

Forward/reverse switching
input pin

L: Forward (CW)
H: Reverse (CCW)

Reset input

L: Stops operation (reset).
H: Operates.

Voltage instruction signal
input pin

Turn on the lower transistor
at 0.2 V or less.

(X, Y, Z pins: On duty of 8%)

Lead angle setting signal
input pin

0 V: 0°
5 V: 58°

(5-bit AD)

HU

HV

HW

CW/CCW

RES

V

e

LA

Digital

With Schmitt trigger
Hysteresis 300 mV (typ.)

L : 0.8 V (max)
H: V
Digital

With Schmitt trigger
Hysteresis 300 mV (typ.)

L : 0.8 V (max)
H: V

Digital

With Schmitt trigger
Hysteresis 300 mV (typ.)

L : 0.8 V (max)
H: V

Analog

Input range 0 V to 5.0 V
Input voltage of Vrefout or higher is

clipped to Vrefout.

Analog

Input range 0 V to 5.0 V
Input voltage of V

clipped to V

- 1 V (min)

refout

- 1 V (min)

refout

- 1 V (min)

refout

refout

refout

.

or higher is

V

V

V

refout

refout

refout

VCC

VCC

V

refout

refout

240 k9

2.4 kW

V

120 k9

2.4 kW

2.4 kW

120 k9

120 W

240 k9

120 W

240 k9

4

2002-12-24

Pin Description Symbol Input/Output Signal Input/Output Internal Circuit

V

refout

Setting dead time input pin
L : 3.8 ms
H or Open: 2.6 ms

Td

Digital

L : 0.8 V (max)

refout

- 1 V (min)

H: V

V
Output logic select signal
input pin

L: Active low
H: Active high

Overcurrent protection
signal input pin

Clock signal input pin Xin

Clock signal output pin X

OS

I

dc

out

Digital

L : 0.8 V (max)

refout

- 1 V (min)

H: V

Analog

Gate block protected at 0.5 V or higher
(released at carrier cycle)

Operating range

2 MHz to 8 MHz (crystal oscillation)

X

refout

VCC

240 kW

5 pF

V

V

refout

in

360 kW

refout

1.2 kW

refout

2.4 kW

0.5 V

VCC

V

120 k9

V

120 k9

refout

TB6551F

Comparator

X

out

V

V

CC

CC

Reference voltage signal
output pin

Vrefout 5 ± 0.5 V (max 30 mA)

5

2002-12-24

Pin Description Symbol Input/Output Signal Input/Output Internal Circuit

refout

Digital

Reverse-rotation-detection
signal output pin

FG signal output pin FG

REV

Push-pull output: ± 1 mA (max)

Digital

Push-pull output: ± 1 mA (max)

120 W

refout

120 W

TB6551F

V

V

refout

V

V

refout

Turn-on signal output pin U
Turn-on signal output pin V
Turn-on signal output pin W
Turn-on signal output pin X
Turn-on signal output pin Y
Turn-on signal output pin Z

U

V

W

X
Y
Z

Analog

Push-pull output: ± 2 mA (max)

L : 0.78 V (max)
H: V

- 0.78 V (min)

refout

V

refout

120 W

6

2002-12-24