TB6557FLG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB6557FLG
DC Motor Driver
The TB6557FLG is a driver IC for driving DC motors. Its
employs LDMOS devices with low ON resistance for output drive
transistors. The TB6557FLG incorporates two constant
current-controlled H-bridge drivers and four voltage-controlled
H-bridge drivers, making it ideal for controlling Zoom/AF/IRIS
lens motors in digital still cameras and camcorders. It supports
three-wire serial data to control motors, thus reducing the
number of lines for interfacing the control IC.
Features
Motor power supply voltage: V
M
Output current: I
out
0.8 A (max)
(typ.)
5 V (max)
Weight: 0.08 g (typ.)
Control power supply voltage: V
CC
= 2.7 to 6 V
P-/N-ch LDMOS complementary output transistors
Output ON resistance: Ron (upper + lower) = .5
Independent standby (Power save) feature
Two 6-bit DACs for setting current value for constant-current H-SW
Thermal shutdown (TSD) protective circuit
Circuit for preventing malfunction at low voltage (shuts down internal circuits at UVLO: V
CC
Small QON-36 package (0.5-mm lead pitch)
Supports Pb-free reflow mounting
2.2 V (typ.)).
High-speed PWM chopping control at 00 kHz or higher (constant-current H-SW)
Note: This product has a MOS structure and is sensitive to electrostatic discharge. When handling this product,
ensure that the environment is protected against electrostatic discharge by using an earth strap, a conductive
mat and an ionizer. Ensure also that the ambient temperature and relative humidity are maintained at
reasonable levels.
1
2003-07-16
TB6557FLG
Recommended Operating Conditions 2: Serial Data Controller
(Ta
Characteristics
Low-level clock pulse width
High-level clock pulse width
Clock rise time
Clock fall time
Data setup time
Data hold time
Load setup time
Load hold time
High-level load pulse width
Latch output settling time
CK (clock pulse) frequency
LD (load pulse) frequency
Symbol
t
CKL
t
CKH
t
Cr
t
Cf
t
DCH
t
CHD
t
CHL
t
LDC
t
LDH
t
LDD
f
CLK
f
LD
30
60
200
100
100
100
2.5
1.5
Rating
Min
200
200
50
50
Max
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
MHz
MHz
Unit
20 to 85°C)
t
Cr
CK
t
CKL
DA
t
CKH
t
Cf
t
CHD
t
LDC
t
DCH
LD
t
CHL
t
LDH
Latch
4
2003-07-16
TB6557FLG
Specifications and Operation of Each Circuit Block:
Bridge output block:
PWM control feature
While PWM control is applied, normal operation t , t5, and short brake t3 are repeated.
(Dead time t2 and t4 are inserted to prevent pass-through current.)
OUT1
M
OUT2
OUT1
M
OUT2
OUT1
M
OUT2
GND
<PWM ON>
t1
<PWM ON
t2
OFF>
GND
<PWM OFF>
t3
GND
V
M
V
M
OUT1
M
OUT2
OUT1
M
OUT2
GND
<PWM OFF
t4
ON>
<PWM ON>
t5
GND
V
M
t1
Output voltage waveform
(OUT1)
t3
t5
GND
t2
t4
5
2003-07-16
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
