PBL 3770A
3
GND
2
GND
1
GND
28
GND
4
V
MM
27
N/C
T
2
VMM
3
GDN
4
GDN
5
GDN
6
GDN
7
VCC
8
I1
9
Phase
10
19
M
A
T
2
V
MM 3
GND
4
GND
5
V
CC 6
I
1 7
Phase
8
15
M
A
14
V
MM
N/C
5
M
A 6
N/C
7
E
8
18
VMM
17
GDN
26
N/C
M
B
1
20
E
M
B 1
16
E
25
N/C
24
V
R
PBL
3770A
16
GDN
15
GDN
14
GDN
13
VR
12
C
11
I
0
PBL
3770A
13
GND
12
GND
11
V
R
10
C
9
I
0
GND
9
M
B 10
T
11
PBL
3770A
23
C
22
N/C
21
I
0
20
Phase
19
I
1
V
MM 12
GND
13
GND
14
GND
15
GND
16
GND
17
Figure 3. Pin configurations.
Pin Description
SO
DIP
PLCC
Symbol
Description
1
2
3
4-7,
14-18
8
9
10
11
12
13
19
20
1
2
3,14
4,5,
12,13
6
7
8
9
10
11
15
16
10
11
12,4
1-3,9,
13-17,28
18
19
20
21
23
24
6
8
Motor output B, Motor current flows from M
A
to M
B
when Phase is high.
Clock oscillator. Timing pin connect a 56 kΩ resistor and a 820 pF in
parallel between T and Ground.
V
MM
Motor supply voltage, 10 to 40 V. Pin 3(12) and pin 14(4) should be wired together.
GND
Ground and negative supply. Note these pins are used for heatsinking.
Make sure that all ground pins are soldered onto a suitable large copper
ground plane for efficient heat sinking.
V
CC
Logic voltage supply normally +5 V.
I
1
Logic input. It controls, together with the I0 input, the current level in the output stage.
The controlable levels are fixed to 100, 60, 20, 0%.
Phase Controls the direction of the motor current of M
A
and M
B
outputs.
Motor current flows from M
A
to M
B
when the phase input is high.
I
0
Logic input. It controls, together with the I1 input, the current level in the output stage.
The controlable levels are fixed to 100, 60, 20, 0%.
C
Comparator input. This input senses the instaneous voltage across the sensing
resistor, filtered through a RC Network.
V
R
Reference voltage. Controls the threshold voltage of the comparator and hence
the output current. Input resistance: typically 6.8 kΩ
±
20%.
M
A
Motor output A, Motor current flows from M
A
to M
B
when Phase is high.
E
Common emitter. Connect the Sence resistor between this pin and ground.
M
B
T
4
V
CC 18
ERICSSON [ ERICSSON ]
