TA84002F
2001-09-06
1
TOSHIBA BIPOLAR LINEAR INTEGRATED CIRCUIT MULTI-CHIP
TA84002F
PWM CHOPPER TYPE 2-PHASE BIPOLAR STEPPING MOTOR DRIVER
The TA84002F is designed to drive both windings of a two-phase
bipolar setpping motor.
FEATURES
l Internal PWM current control
l Wide range of operating supply voltage
V
M
(motor)
: 10 V to 30 V
V
CC
(control) : 4.5 V to 5.5 V
l Output current : 1.0 A (peak)
l Multichip IC consisting of four P-channel
MOSFETs and one main chip.
l Full-step and half-step are available
l Internal thermal-shutdown circuit
l Package :
HSOP20-P-450-1.00
Note1: This product has a multichip (MCP) structure utilizing Pch MOS technology. Take care when handling
because Pch MOS has low electrostatic resistance.
PIN ASSIGNMENT
Weight : 0.79 g (Typ.)
TA84002F
2001-09-06
2
BLOCK DIAGRAM
TRUTH TABLE
PHASE
ENABLE
OUT (+)
OUT (-)
X H
OFF
OFF
H L H L
L L L H
X: Don't
care
TA84002F
2001-09-06
3
OUTPUT STAGE
l The TA84002F is Multichip IC consisting of four
P-channel MOSFETs and one main chip.
l Four P-channel MOSETs are used as upper-side
power transistors.
l Output current is controlled by swiching
lower-side transistor.
l Durin CHOP ON, the current flows through
P-channel MOS, The motor winding, sink
transistor and sense resistor.
l During CHOP OFF, the current circulates the
motor winding, P-channel MOS and the diode of
P-channel MOS.
l Power dissipation is divided by the five chips.
: (1) CHOP ON
(Drive Mode)
Q1: ON, Q2: OFF
Q3: OFF, Q4: ON
: (2) CHOP OFF
(Slow Decay)
Q1: ON, Q2: OFF
Q3: OFF, Q4: OFF
: (3) ALL OFF
(Fast Decay)
TA84002F
2001-09-06
4
PWM CURRENT CONTROL
Output current is sensed and cotrolled independently in each bridge by an external sense resistor (RFN), internal
comparator, and mono-stable multi-vibrator.
When the bridge is turn ON, current increases in the motor winding and flows through the external sense resistor
until the sense voltage (VNF) reaches the level set at the comparator' s input: V
ref
/ 5
The comparator then triggers the mono-stable, which turn OFF the lower transistor of the bridge.
The OFF time is determined by the mono-stable' s external RC timing components.
t
OFF
1.1 CR
The value of the current limiting (I
O
) is approximated by
I
O
= (V
ref
/ 5) / RNF-0.05
TA84002F
2001-09-06
5
TIMING CHART
(1) Full Step
TA84002F
2001-09-06
6
(2) Half Step
TA84002F
2001-09-06
7
MAXIMUM RATINGS
(Ta = 25C)
CHARACTERISTIC SYMBOL RATING
UNIT
Supply Voltage (Motor)
V
M
35 V
Supply Voltage (Control)
V
CC
7 V
Output Current
I
O
1.0 A
/
ch
Input Voltage
V
IN
GND - 0.4 to V
CC
+ 0.4 V
V
Power Dissipation
P
D
2.5 (Note)
W
Operating Temperature
T
opr
-30 to 85
C
Storage Temperature
T
stg
-55 to 150
C
Note: This rating is obtained by mounting on 50 50 1.6 mm PCB that occupied above 60% of copper.
RECOMMENDED OPERATION CONDITION
(Ta = -30 to 85C)
CHARACTERISTIC SYMBOL
TEST
CIR-
CUIT
TEST CONDITION
MIN
TYP.
MAX
UNIT
Supply Voltage (Control)
V
CC
4.5
5.0
5.5
V
Supply Voltage (Motor)
V
M
10
24
30
V
Output Current
I
O
0.8 A
/
ch
Input Voltage
V
IN
PHASE,
ENABLE
GND
V
CC
V
Reference Voltage
V
ref
1.2
2.5
V
CC
- 0.5
V
PWM Frequency
f
PWM
15
30
50
kHz
TA84002F
2001-09-06
8
ELECTRICAL CHARACTERISTICS
(Ta = 25C, V
CC
= 5 V, V
M
= 24 V)
CHARACTERISTIC SYMBOL
TEST
CIR-
CUIT
TEST CONDITION
MIN
TYP.
MAX
UNIT
V
IN
(H) 2.0
V
CC
+
0.3 V
Input Voltage
V
IN
(L)
1 PHASE,
ENABLE
GND
- 0.3 V
0.8
V
I
IN
(H) PHASE,
ENABLE,
V
IN
= 5 V
2 20
I
IN
(L) PHASE,
V
IN
= GND
0 1
Input Current
I
IN
(L)
2
ENABLE, V
IN
= GND
55 100
A
I
CC1
3
ENABLE A / B = Low
2-Phase 100% ON
110 180
I
CC2
4
ENABLE A / B = Low
2-Phase 100% OFF
6 14
I
CC3
3
ENABLE A = Low,
B = High
1-Phase 100% ON
55 90
I
CC4
4
ENABLE A = Low,
B = High
1-Phase 100% OFF
6 14
I
CC5
3
ENABLE A / B = High
2-Phase OFF
6 14
IM1
ENABLE A / B = Low
2-Phase ON
5 13
IM2
ENABLE A = Low,
B = High
1-Phase ON
4.5 11
Supply Current
IM3
5
ENABLE A / B = High
2-Phase OFF
4 9
mA
V
SAT
1 I
O
= 0.5 A
0.35 0.8
Output Saturation Voltage
(Lower-side)
V
SAT
2
6
I
O
= 1.0 A
0.65 2.0
V
ON Resistor (Upper-side) Ron1
7
I
O
= 0.5 A
0.6 1.0
Diode Forward Voltage (Lower-side) VF(L) 8
I
F
= 1.0 A
1.4 2.0 V
Diode Forward Voltage (Upper-side) VF(H) 9
I
F
= 1.0 A
0.95 1.8 V
Reference Voltage Range
V
ref
1.0 2.5 V
CC
-
0.5
V
Reference Current
I
ref
10 V
ref
= 2.5 V
0.2 5 A
Reference Divider Ratio
GAIN
11
VNF / Vref
0.17
0.2
0.23
Setting Current
I
set
V
ref
= 2.5 V, RNF = 1 0.35
0.45
0.55
A
Thermal Shutdown Temperature
TSD
T
j
165 C
Thermal Shutdown Hysteriesis
T
15 C
IL (H)
P-channel MOS
0 100
Output Leakage Current
IL (L)
12
0 50
A
Pch MOS Drive Current
I
G
13
330
530
730
A
TA84002F
2001-09-06
9
TEST CIRCUIT
1. V
IN
(H), V
IN
(L)
2. I
IN
(H), I
IN
(L)
TA84002F
2001-09-06
10
3. I
CC
1, I
CC
3, I
CC
5
4. I
CC
2, I
CC
4
TA84002F
2001-09-06
11
5. I
M
1, I
M
2, I
M
3
6. V
SAT
1, V
SAT
2
TA84002F
2001-09-06
12
7. R
on
1
8. VF
(L)
TA84002F
2001-09-06
13
9. VF
(H)
10. I
ref
TA84002F
2001-09-06
14
11. I
set
12. I
L
(H), I
L
(L)
TA84002F
2001-09-06
15
13. I
G
TA84002F
2001-09-06
16
APPLICATION CIRCUIT
In case of I
OUT
= 0.5 A
Note 1: Capacitor for noise suppression to be connected between the Power Supply (V
CC
, V
M
, V
ref
) and GND to
stabilize the operation.
Note 2: Utmost care is necessary in the design of the output line, V
M
and GND line since IC may be destroyed due
to short-circuit between outputs, air contamination fault, or fault by improper grounding.
TA84002F
2001-09-06
17
PACKAGE DIMENSIONS
HSOP20-P-450-1.00
Unit : mm
Weight : 0.79 g (Typ.)
TA84002F
2001-09-06
18
TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the "Handling Guide for Semiconductor Devices," or "TOSHIBA Semiconductor Reliability
Handbook" etc..
The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.). These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury ("Unintended Usage"). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in this
document shall be made at the customer's own risk.
The products described in this document are subject to the foreign exchange and foreign trade laws.
The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA CORPORATION for any infringements of intellectual property or other
rights of the third parties which may result from its use. No license is granted by implication or otherwise under
any intellectual property or other rights of TOSHIBA CORPORATION or others.
The information contained herein is subject to change without notice.
000707EBA
RESTRICTIONS ON PRODUCT USE
PDF 
ZIP