TB62269FTG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB62269FTG
PWM method CLK-IN bipolar stepping motor driver
The TB62269FTG is a two-phase bipolar stepping motor driver using a PWM chopper.
Fabricated with the BiCD process, the TB62269FTG is rated at 40 V/1.8 A .
The internal voltage regulator allows control of the motor with a single
VM power supply.
Features
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Drive control is possible in a bipolar stepping motor at 1 chip.
Allows full, half and quarter ,1/8,1/16,1/32 step resolutions.
Low on-resistance of output stage transistor is low by using BiCD process.
High Voltage and current (For specification, please refer to absolute
maximum ratings and operation ranges)
Thermal shutdown (TSD)、over-current shutdown (ISD),
and power-on reset of VM power supply (POR)
Built-in regulator allows the TB62269FTG to function with only VM power supply.
Able to customize PWM signal frequency by external resistance/capacitor.
Packages
TB62269FTG : (P-WQFN48-0707-0.50-003)
PWM controlled constant-current drive
P-WQFN48-0707-0.50-003
Weight:0.14g(Typ.)
Note) Please be careful about thermal conditions during use.
1
2014-3-18
TB62269FTG
Pin assignment
(Top View)
OUT_B1
OUT_B2
OUT_A2
RS_B1
RS_B2
VCC
VM
NC
NC
NC
NC
36 35 34 33 32 31 30 29 28 27 26 25
NC
L_OUT
D_MODE0
GND
VREF_B
VREF_A
OSCM
CW/CCW
37
38
39
40
41
42
43
44
TB62269FTG
24 NC
23 NC
22 GND
21 OUT_B1-
20 OUT_B2-
19 GND
18 GND
17 OUT_A2-
16 OUT_A1-
15 GND
14 NC
13 NC
1
NC
2
CLK_IN
3
ENABLE
4
RESET
5
GND
6
NC
7
RS_A1
8
RS_A2
9 10 11 12
OUT_A1
NC
NC
MO_OUT 45
D_MODE1 46
D_MODE2 47
NC 48
※
Please mount the four corner pins of the QFN package and the exposed pad to the GND area of the PCB.
NC
2
NC
2014-3-18
TB62269FTG
Block Diagram
L_OUT
D_MODE0
VCC Voltage
Regulator
CW/CCW
D_MODE1
D_MODE2
CLK_IN
ENABLE
RESET
MO_OUT
VMR Detect
Step Decoder
(Input Logic)
VCC
Chopper OSC
OSCM
OSC
Current Level Set
VREF
Torque Control
5bit D/A
(Angle Control)
CR-CLK
Converter
Current Feedback (×2)
VM
V
RS
1
R
S
COMP1
RS
Output Control
(Mixed Decay Control)
ENABLE
Output
(H-Bridge×2)
VM
ISD
VMR
Detect
TSD
Detection Circuit
Stepping Motor
Functional blocks/circuits/constants in the block chart etc. may be omitted or simplified for
explanatory purposes.
Application Notes
All the grounding wires of the TB62269FTG must run on the solder mask on the PCB and be externally
terminated at only one point. Also, a grounding method should be considered for efficient heat dissipation.
Careful attention should be paid to the layout of the output, VDD (VM) and GND traces, to avoid short circuits
across output pins or to the power supply or ground. If such a short circuit occurs, the TB62269FTG may be
permanently damaged.
Also, the utmost care should be taken for pattern designing and implementation of the TB62269FTG since it has
power supply pins (VM, RS, OUT, GND) through which a particularly large current may run. If these pins are
wired incorrectly, an operation error may occur or the TB62269FTG may be destroyed.
The logic input pins must also be wired correctly. Otherwise, the TB62269FTG may be damaged owing to a
current running through the IC that is larger than the specified current.
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TB62269FTG
Pin Function
TB62269FTG (QFN48)
Function explanation of terminal number 1 to 48
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Pin Name
NC
CLK_IN
ENABLE
RESET
GND
NC
RS_A1*
RS_A2*
NC
OUT_A1*
OUT_A2*
NC
NC
NC
GND
OUT_A1-*
OUT_A2-*
GND
GND
OUT_B2-*
OUT_B1-*
GND
NC
NC
No-connect
An electrical angle leads on the rising edge of
the clock input. A motor rotation count depends 26
on the input frequency.
A/B channel output enable
Electric angle reset
Logic ground
No-connect
Motor Ach current sense pin
No-connect
Ach positive driver output
No-connect
No-connect
No-connect
Motor power ground
Ach negative driver output
Motor power ground
Motor power ground
Bch negative driver output
Motor power ground
No-connect
No-connect
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
OUT_B1*
NC
RS_B2*
RS_B1*
NC
VM
NC
VCC
NC
NC
NC
L_OUT
D_MODE0
GND
VREF_B
VREF_A
OSCM
CW/CCW
MO_OUT
D_MODE1
D_MODE2
NC
No-connect
Motor Bch current sense pin
No-connect
Motor Power supply
No-connect
Internal VCC regulator monitor pin
No-connect
No-connect
No-connect
Error detect signal output
Step resolution mode control 0
Logic ground
Tunes the current level for Bch motor drive.
Tunes the current level for Ach motor drive.
Oscillator pin for PWM chopper
Motor rotation: forward/reverse
Electric angle monitor
Step resolution mode control 1
Step resolution mode control 2
No-connect
OUT_B2*
Bch positive driver output
Function
Pin
No.
25
Pin Name
NC
No-connect
Function
・Please
use the pin of NC with Open.
*Please connect the pins with the same names, at the nearest point of the device.
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2014-3-18
TB62269FTG
CLK Function
The electrical angle leads one by one in the manner of the clocks. The clock signal is reflected to the electrical angle
on the rising edge.
CLK Input
Rise
Fall
Function
The electrical angle leads one by one on the rising edge.
Remains at the same position.
ENABLE Function
The ENABLE pin controls whether the current is allowed to flow through a given phase for a stepper motor drive.
This pin selects whether the motor is stopped in Off mode or activated. The pin must be fixed to Low at power-on or
power-down of the TB62269FTG.
ENABLE Input
H
L
Function
Output transistors are enabled (normal operation mode).
Output transistors are disabled (high impedance state).
CW/CCW Function
The CW/CCW pin controls the rotation direction of the motor. When set to ‘Clockwise’, the current of OUTA is
output first, with a phase difference of 90°. When set to ‘Counter clockwise”, the current of OUTB is output first with
a phase difference of 90°.
CW/CCW Input
H
L
Function
Clock-wise
OUT (+)
H
L
OUT (-)
L
H
Counter clock-wise
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2014-3-18
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