TA7774P/PG/F/FG
TOSHIBA Bipolar Linear Integrated Circuit
Silicon Monolithic
TA7774P/PG, TA7774F/FG, TA7774FAG
Stepping Motor Driver IC
The TA7774P/PG and TA7774F/FG/FAG are two-phase bipolar
stepping motor driver ICs designed especially for 3.5- or 5.25-inch
FDD head actuator drives.
The ICs have a dual-bridge driver supporting the bipolar driving of
induced loads, a power-saving circuit, and a standby circuit. They
are ideal for achieving reduced set size and lower power
consumption.
TA7774P/PG
Features
One-chip two-phase bipolar stepping motor driver
Power saving operation is available.
Standby operation is available.
Current consumption
≤
115
μA
Built-in punch-through current restriction circuit for system
reliability and noise suppression
TTL-compatible inputs INA, INB, and PS pins
High driving ability
TA7774P/PG/F/FG
: I
O
(START) 350 mA (MAX): V
S1
ENABLE
: I
O
(HOLD) 100 mA (MAX): V
S2
ENABLE
TA7774FAG
: I
O
(START) 100 mA (MAX): V
S1
ENABLE
: I
O
(HOLD) 50 mA (MAX): V
S2
ENABLE
Typical PKG DIP16 pin, HSOP16 pin, and SSOP16 pin
GND pin = heatsink
SSOP16-P-225-1.00A
TA7774FAG
TA7774F/FG
TA7774PG/FG-FAG:
The TA7774PG/FG/FAG is a lead-free (Pb-free) product.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-37Pb solder bath
*solder bath temperature = 230°C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
2. Use of Sn-3.0Ag-0.5Cu solder bath
*solder bath temperature = 245°C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
Weight
DIP16-P-300-2.54A: 1.11 g (typ.)
HSOP16-P-300-1.00: 0.50 g (typ.)
SSOP16-P-225-1.00A: 0.14 g (typ.)
1
2007-6-4
TA7774P/PG/F/FG
Block Diagram
TA7774P/PG/F/FG/FAG
Note:
Pins 2, 7, 12, and 13 of the TA7774F/FG are all NC; the heat fin is connected to GND.
Pin Description
Pin No.
1 / (1)
2 / (3)
3 / (4)
4 / (F)
5 / (F)
6 / (5)
7 / (6)
8 / (8)
9 / (9)
10 / (10)
11 / (11)
Symbol
V
S2 A
V
CC
IN A
GND
GND
IN B
PS
V
S2 B
V
S1 B
φB
φ
B
Functional Description
Low-voltage power supply terminal
Power voltage supply terminal for control
A-ch forward rotation / reverse rotation signal input terminal, Truth Table 1
GND terminal
GND terminal
B-ch forward rotation / reverse rotation signal input terminal, Truth Table 1
Power saving signal input terminal
Standby signal input terminal, Truth Table 2
High-voltage power supply terminal
Output B
Output B
GND terminal
GND terminal
Output
Α
Output A
High-voltage power supply terminal.
12 / (F)
13 / (F)
14 / (14)
15 / (15)
16 / (16)
GND
GND
φΑ
φA
V
S1 A
(
):
TA7774F/FG
2
2007-6-4
TA7774P/PG/F/FG
Truth Table 1
Input
Output
PS
L
L
H
H
IN
L
H
L
H
φ
L
H
L
H
φ
H
L
H
L
Enable V
S1
Enable V
S1
Enable V
S2
(power saving)
Enable V
S2
(power saving)
Truth Table 2
V
S2 B
L
H
Power off (standby)
Operation
Note: Apply 5 V to V
S2A
as a supply terminal.
3
2007-6-4
TA7774P/PG/F/FG
Output Circuit
Input Circuit
IN A, IN B
Input Circuit
V
S2 A
or V
S2 B
TA7774P/PG/F/FG/FAG
Absolute Maximum Ratings
(Ta = 25
°C
)
Characteristic
Symbol
Rating
Unit
V
CC
Supply voltage
V
S1
V
S2
TA7774P/PG
TA7774F/FG
Output current
TA7774FAG
I
O (PEAK)
I
O (START)
I
O (HOLD)
I
O (PEAK)
I
O (START)
I
O (HOLD)
Input voltage
TA7774P/PG
Power dissipation
TA7774F/FG
TA7774FAG
Operating temperature
Storage temperature
T
opr
T
stg
P
D
V
IN
7.0
17.0
≤
V
CC
V
Note 1: IC only
Note 2: This value is obtained if
mounting is on a 50 × 50
× 0.8 mm PCB, 60% or
more of which is occupied
by copper.
±400
±350
±100
±200
±100
±50
≤
V
CC
mA
V
Note 3: This value is obtained if
mounting is on a 60 × 30
× 1.6 mm PCB, 50% or
more of which is occupied
by copper.
Note 4: This value is obtained if
mounting is on a 50 × 50
× 1.6 mm PCB, 40% or
more of which is occupied
by copper.
1.4 (Note 1)
2.7 (Note 2)
1.4 (Note 3)
0.78 (Note 4)
−30
to 75
−55
to 150
°C
°C
W
4
2007-6-4
TA7774P/PG/F/FG
Electrical Characteristics
(Unless otherwise specified, Ta = 25°C, V
CC
= 5 V, V
S1
= 12 V, V
S2A
= 5 V)
Characteristic
Symbol
Test
Cir−
cuit
Test Condition
Min
Typ.
Max
Unit
I
CC1
Supply current
I
CC2
I
CC3
V
IN H
V
IN L
Input voltage
V
PS H
V
PS L
V
S2 BH
V
S2 BL
Input current
I
IN
I
PS
V
SAT 1H1
V
SAT 1H2
TA7774P/PG
TA7774F/FG
V
SAT 2H1
V
SAT 2H2
V
SAT L1
V
SAT L2
Output
saturation
voltage
V
SAT L3
V
SAT 1H1
V
SAT 1H2
V
SAT 2H1
TA7774FAG
V
SAT 2H2
V
SAT L1
V
SAT L2
V
SAT L3
Diode forward voltage
V
F U
V
F L
t
pLH
t
pHL
V
CC (opr.)
4
2
2
2
1
―
1
PS: H, V
S2B
: H
PS: L, V
S2B
: H
V
S2B
: L
Pin 3, 6
T
j
= 25°C
V
S2B
: H
Pin 7
―
―
70
2.0
GND
2.0
GND
3.5
GND
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
―
4.5
9
8.5
90
―
―
―
―
―
―
2.6
2.6
0.9
1.2
1.6
1.8
0.03
0.15
0.35
0.9
1.0
1.6
1.7
0.03
0.15
0.2
1.5
1.0
7
2
5.0
14
13
115
V
CC
0.8
V
CC
0.8
V
CC
0.4
30
30
―
1.5
―
2.1
―
―
0.6
―
1.3
―
2.0
―
―
0.4
―
―
―
―
5.5
mA
μA
V
T
j
= 25°C
Pin 8
Pin 3, 6
T
j
= 25°C, V
S2B
: H
V
IN
/ PS (2 V): sink current Pin 7
PS: L, V
S2B
: H
I
OUT
= 100 mA
I
OUT
= 400 mA
I
OUT
= 20 mA
I
OUT
= 100 mA
I
OUT
= 20 mA
V
S2B
: H
I
OUT
= 100 mA
I
OUT
= 400 mA
PS: L, V
S2B
: H
I
OUT
= 100 mA
I
OUT
= 200 mA
I
OUT
= 20 mA
I
OUT
= 50 mA
I
OUT
= 20 mA
V
S2B
: H
I
OUT
= 100 mA
I
OUT
= 200 mA
I
F
= 350 mA
μA
2
3
PS: H, V
S2B
: H
V
3
PS: H, V
S2B
: H
V
Delay time
Operating voltage
―
―
IN
− φ
V
CC
= ST
μs
V
Recommended operating voltage
V
S1 (opr.)
12 V ± 10%
V
S2A (opr.)
5 V ± 10%
Operating voltage restriction V
S1
≥
V
S2A
5
2007-6-4
