Ericsson PBL3775-1NS, PBL3775-1QNS, PBL3775-1QNT, PBL3775-1SOS, PBL3775-1SOT Datasheet

February 1999

28-pin PLCC package

22-pin plastic DIP package

24-pin SO package

Key Features

• Dual chopper driver in a single
package.

• Operation down to -40°C.

• 750 mA continuous output current
per channel.

• Low power dissipation, 2.0 W at
2 x 500 mA output current.

• Close matching between channels
for high microstepping accuracy.

• Digital filter on chip eliminates
external filtering components.

• Plastic 22-pin batwing DIL package,
24-pin SOIC batwing or 28-pin power
PLCC. All with lead-frame for
heatsinking through PC board
copper.

PBL 3775/1

Dual Stepper Motor Driver

Description

The PBL 3775/1 is a switch-mode (chopper), constant-current driver IC with two
channels, one for each winding of a two-phase stepper motor. The circuit is similar to
Ericsson´s PBL 3773/1. While several of Ericsson´s dual stepper motor drivers are
optimized for micro-stepping applications, PBL 3775/1 is equipped with a disable
input to simplify half-stepping operation.

The PBL 3775/1 contains a clock oscillator, which is common for both driver
channels, a set of comparators and flip-flops implementing the switching control, and
two output H-bridges, including recirculation diodes.

Voltage supply requirements are + 5 V for logic and + 10 to + 45 V for the motor.

The close match between the two driver channels guarantees consistent output
current ratios and motor positioning accuracy.

PBL3775/1

PBL

3775/1

RC

PBL 3775/1

M

A1

M

B1

M

B2

M

A2

GNDC

2

V

R2

Phase

2

V

CC

C

1

V

R1

Phase

1

E

1

E

2

V

CC

SRQ

Logic

S

R

Q

+

–

Logic

+
–

V

MM2

V

MM1

Dis

1

Dis

2

+
–

Figure 1. Block diagram

PBL 3775/1

PBL 3775/1

2

Maximum Ratings

Parameter Pin No. (DIP) Symbol Min Max Unit

Voltage

Logic supply 12 V

CC

07V

Motor supply 4, 19 V

MM

045V

Logic inputs 9, 10, 13, 14 V

I

-0.3 6 V

Analog inputs 7, 8, 15, 16 V

A

-0.3 V

CC

V

Current

Motor output current 1, 3, 20, 22 I

M

-850 +850 mA

Logic inputs 9, 10, 13, 14 I

I

-10 mA

Analog inputs 7, 8, 15, 16 I

A

-10 mA

Temperature

Operating junction temperature T

J

-40 +150 °C

Storage temperature T

S

-55 +150 °C

Power Dissipation (Package Data)

Power dissipation at T

BW

= +25°C, DIP and PLCC package P

D

5W

Power dissipation at T

BW

= +125°C, DIP package P

D

2.2 W

Power dissipation at T

BW

= +125°C, PLCC package P

D

2.6 W

Recommended Operating Conditions

Parameter Symbol Min Typ Max Unit

Logic supply voltage V

CC

4.75 5 5.25 V

Motor supply voltage V

MM

10 40 V

Output emitter voltage V

E

1.0 V

Motor output current I

M

-750 +750 mA

Operating junction temperature T

J

-20 +125 °C

Rise and fall time logic inputs t

r,

, t

f

2 µs

Oscillator timing resistor R

T

2 12 20 kohm

Figure 3. Definition of terms.

Figure 2. Definition of symbols.

V

R

t

d

t

50 %

t

on

t

off

| V – V |

MA MB

t

t

V

RC

t

b

V ( I )

E

M

f =

s

t

ontoff

+

1

D =

t

t

on

off

+

t

on

I I

M OL

I

CC

I I I

I IH IL

I

A

4 700 pF

V

CC

V
V
V

I

IH

IL

V
V

A

R

V
V
V

CH

C

A

I
I

C

A

V

E

V

MM

R

S

R

T

12 kW

I

MM

C

T

I

R

V

RC

I

RC

V

MA

V

M

RC

PBL 3775/1

19

11

12

M

A1

M

B1

M

B2

M

A2

GNDC2V

R2

Phase

2

V

CC

C

1VR1

Phase

1

E

1

E

2

V

CC

22
20

14

15

SRQ

16

5, 6, 17, 18

Logic

21

S

R

Q

+

–

Logic

+
–

4

1

3

2

87

9

V

MM2

V

MM1

Dis

1

10

Dis

13

2

+
–

PBL 3775/1

3

Electrical Characteristics

Electrical characteristics over recommended operating conditions, unless otherwise noted. - 20° C ≤ Tj ≤ + 125° C.

Ref.

Parameter Symbol fig. Conditions Min Typ Max Unit

General

Supply current I

CC

2 Note 4. 55 70 mA

Supply current I

CC

2 Dis1= Dis2= HIGH. 7 10 mA

Total power dissipation P

D

8VMM= 24 V, IM1= IM2= 500 mA. 2.0 2.3 W

Notes 2, 3, 4.

Total power dissipation P

D

8VMM= 24 V, IM1= 700 mA, IM2= 0 mA. 1.7 2.0 W

Notes 2, 3, 4.
Thermal shutdown junction temperature 160 °C
Turn-off delay t

d

3TA = +25°C, dVC/dt ≥ 50 mV/µs, 1.1 2.0 µs

I

M

= 100 mA. Note 3.

Logic Inputs

Logic HIGH input voltage V

IH

2 2.0 V

Logic LOW input voltage V

IL

2 0.6 V

Logic HIGH input current I

IH

2VI = 2.4 V 20 µA

Logic LOW input current I

IL

2VI = 0.4 V -0.2 -0.1 mA

Analog Inputs

Threshold voltage V

CH

2VR=5 V 480 500 520 mV

Input current I

A

2VR= 5 V 500 µA

|V

C1—VC2

| mismatch V

Cdiff

21mV

Motor Outputs

Lower transistor saturation voltage 10 I

M

= 500 mA 0.4 0.8 V

Lower transistor leakage current 2 V

MM

=41 V,TA = +25°C. Dis1= Dis2= HIGH. 100 µA

Lower diode forward voltage drop 11 I

M

= 500 mA 1.1 1.3 V

Upper transistor saturation voltage 12 I

M

= 500 mA. 1.1 1.4 V

Upper diode forward voltage drop 13 I

M

= 500 mA. 1.1 1.4 V

Upper transistor leakage current 2 V

MM

=41 V,TA = +25°C. Dis1= Dis2= HIGH.

.

100 µA

Chopper Oscillator

Chopping frequency f

s

3CT = 4 700 pF, RT = 12 kohm 21.5 23.0 24.5 kHz

Digital filter blanking time t

b

3CT = 4 700 pF. Note 3. 1.0 µs

Thermal Characteristics

Ref.

Parameter Symbol fig. Conditions Min Typ Max Unit

Thermal resistance Rth

J-BW

DIL package. 11 °C/W

Rth

J-A

14 DIL package. Note 2. 40 °C/W

Rth

J-BW

PLCC package. 9 °C/W

Rth

J-A

14 PLCC package. Note 2. 35 °C/W

Rth

j-c

SO package 13 °C/W

Rth

j-a

SO package 42 °C/W

Notes

1. All voltages are with respect to ground. Currents are positive into, negative out of specified terminal.

2. All ground pins soldered onto a 20 cm

2

PCB copper area with free air convection, T

A

= + 25° C.

3. Not covered by final test program.

4. Switching duty cycle D = 30 %, f

s

= 23.0 kHz.