Document
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.
Features
z One-chip two-phase bipolar stepping motor driver z Power saving operation is available. z Standby operation is available.
Current consumption ≤ 115 μA z Built-in punch-through current restriction circuit for system
reliability and noise suppression z TTL-compatible inputs INA, INB, and PS pins z High driving ability
TA7774P/PG/F/FG : IO(START) 350 mA (MAX): VS1 ENABLE : IO(HOLD) 100 mA (MAX): VS2 ENABLE
TA7774FAG : IO(START) 100 mA (MAX): VS1 ENABLE : IO(HOLD) 50 mA (MAX): VS2 ENABLE
z Typical PKG DIP16 pin, HSOP16 pin, and SSOP16 pin z GND pin = heatsink
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
TA7774P/PG
TA7774F/FG
TA7774FAG
SSOP16-P-225-1.00A
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
Block Diagram
TA7774P/PG/F/FG
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.
Symbol
1 / (1) 2 / (3) 3 / (4) 4 / (F) 5 / (F) 6 / (5) 7 / (6) 8 / (8) 9 / (9) 10 / (10) 11 / (11) 12 / (F) 13 / (F) 14 / (14) 15 / (15) 16 / (16)
VS2 A VCC IN A GND GND IN B PS VS2 B VS1 B φB φB GND GND φΑ φA VS1 A
( ): TA7774F/FG
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.
2 2007-6-4
Truth Table 1
Input
Output
PS IN φ φ
L L L H Enable VS1
L H H L Enable VS1
H L L H Enable VS2 (power saving)
H H H L Enable VS2 (power saving)
Truth Table 2
VS2 B
L Power off (standby) H Operation
Note: Apply 5 V to VS2A as a supply terminal.
TA7774P/PG/F/FG
3 2007-6-4
Output Circuit
TA7774P/PG/F/FG
Input Circuit IN A, IN B
Input Circuit VS2 A or VS2 B
TA7774P/PG/F/FG/FAG
Absolute Maximum Ratings (Ta = 25°C)
Characteristic Supply voltage
Output current
TA7774P/PG TA7774F/FG
TA7774FAG
Input voltage
TA7774P/PG Power dissipation
TA7774F/FG TA7774FAG Operating temperature Storage temperature
Symbol VCC VS1 VS2
IO (PEAK) IO (START) IO (HOLD) IO (PEAK) IO (START) IO (HOLD)
VIN
PD
Topr Tstg
Rating
Unit
7.0
Note 1: IC only
17.0
V
≤VCC
Note 2: This value is obtained if mounting is on a 50 × 50
±400
× 0.8 mm PCB, 60% or
±350 ±100 ±200
more of which is occupied by copper.
mA Note 3: This value is obtained if mounting is on a 60 × 30
±100
× 1.6 mm PCB, 50% or
±50 more of which is occupied
by copper.
≤VCC
V
1.4 (Note 1)
Note 4: This value is obtained if mounting is on a 50 × 50
2.7 (Note 2) 1.4 (Note 3) 0.78 (Note 4)
W
× 1.6 mm PCB, 40% or more of which is occupied by copper.
−30 to 75
°C
−55 to 150
°C
4 2007-6-4
TA7774P/PG/F/FG
Electrical Characteristics
(Unless otherwise specified, Ta = 25°C, VCC = 5 V, VS1 = 12 V, VS2A = 5 V)
Characteristic Supply current
Input voltage
Input current
TA7774P/PG TA7774F/FG Output saturation voltage TA7774FAG
Diode forward voltage Delay time Operating voltage
Symbol
ICC1 ICC2 ICC3 VIN H VIN L VPS H VPS L VS2 BH VS2 BL IIN IPS VSAT 1H1 VSAT 1H2 VSAT 2H1 VSAT 2H2 VSAT L1 VSAT L2 VSAT L3 VSAT 1H1 VSAT 1H2 VSAT 2H1 VSAT 2H2 VSAT L1 VSAT L2 VSAT L3 VF U VF L tpLH tpHL VCC (opr.)
Test Cir− cuit
Test Condition
PS: H, VS2B: H 1 PS: L, VS2B: H
VS2B: L
Tj = 25°C VS2B: H ―
Pin 3, 6 Pin 7
Min
― ― 70 2.0 GND 2.0 GND
Tj = 25°C
Pin 8
3.5 GND
1
Tj = 25°C, VS2B: H
Pin 3, 6
VIN / PS (2 V): sink current Pin 7
― ―
2 PS: L, VS2B: H 3 PS: H, VS2B: H 2 VS2B: H 2 PS: L, VS2B: H 3 PS: H, VS2B: H 2 VS2B: H 4 IF = 350 mA
IOUT = 100 mA IOUT = 400 mA IOUT = 20 mA IOUT = 100 mA IOUT = 20 mA IOUT = 100 mA IOUT = 400 mA IOUT = 100 mA IOUT = 200 mA IOUT = 20 mA IOUT = 50 mA IOUT = 20 mA IOUT = 100 mA IOUT = 200 mA
― ― ― ― ― ― ― ― ― ― ― ― ― ― ― ―
― IN − φ
― ―
― VCC = ST
4.5
Typ.
9 8.5 90 ― ― ― ― ― ― 2.6 2.6 0.9 1.2 1.6 1.8 0.03 0.15 0.