TB62710P/F/FN
TOAHIBA Bi-CMOS Integrated Circuit Silicon Monolithic
TB62710P,TB62710F,TB62710FN
8-Bit Constant-Current LED Driver for Cathode Common LED
The TB62710P, TB62710F and TB62710FN are specifically
designed for use as LED and LED display (cathode-common)
Constant-current drivers.
The constant-current output circuits can be set up using an
external resistor (IOUT =
−90
mA max).
These ICs are monolithic integrated circuits have been
designed using the Bi-CMOS process.
The devices consist of an 8-bit shift register, a latch, an
ANDgate and constant-current drivers.
TB62710P
FEATURES
•
Constant-current output:
A single resistor can be used to set any output current in the
range
−5~−90
mA.
•
•
•
Maximum clock frequency: f
CLK
= 15 MHz
(operating while connected in cascade, T
opr
= 25°C)
5-V CMOS compatible input
Packages:
P-type: DIP20-P-300-2.54A
F-type: SSOP24-P-300-1.00
FN-type: SSOP20-P-225-0.65A
•
Constant-output-current accuracy:
Output
−
GND
Voltage
≥
2.0 V (min)
≥
1.5 V (min)
Current accuracy
between bits
between ICs
±6%
±15%
Output Current
(max)
−5~−90
mA
−5~−40
mA
TB62710F
TB62710FN
Weight
DIP20-P-300-2.54A: 2.25 g (typ.)
SSOP24-P-300-1.00: 0.33 g (typ.)
SSOP20-P-225-0.65A: 0.10 g (typ.)
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2006-06-14
TB62710P/F/FN
Pin Assignment
(top view)
P- & FN-types
GND
SERIAL-IN
CLOCK
LATCH
NC
V
CC
OUT0
OUT1
OUT2
OUT3
V
DD
R-EXT
SERIAL-OUT1
ENABLE
SERIAL-OUT2
V
CC
OUT7
OUT6
OUT5
OUT4
GND
SERIAL-IN
CLOCK
NC
LATCH
NC
V
CC
NC
OUT0
OUT1
OUT2
OUT3
F-type
V
DD
R-EXT
SERIAL-OUT1
ENABLE
SERIAL-OUT2
NC
V
CC
NC
OUT7
OUT6
OUT5
OUT4
Block Diagram
OUT0
OUT1
OUT7
R-EXT
I-REG
V
CC
V
CC
V
CC
ENABLE
Q
ST
LATCH
D
CK
SERIAL-OUT1
SERIAL-IN
D
CK
Q
D
CK
Q
D
CK
Q
Q
SERIAL-OUT2
D
ST
Q
D
ST
Q
D
CLOCK
Truth Table
CLOCK
LATCH
ENABLE
L
L
L
L
H
SERIAL-IN
Dn
Dn
+
1
Dn
+
2
Dn
+
3
Dn
+
3
OUT0
…
OUT5
…
OUT7
Dn
…
Dn
−
5
…
Dn
−
7
No Change
Dn
+
2
…
Dn
−
3
…
Dn
−
5
Dn
+
2
…
Dn
−
3
…
Dn
−
5
OFF
SERIAL-OUT
Dn
−
7
Dn
−
6
Dn
−
5
Dn
−
5
Dn
−
5
H
L
H
X
X
Note 1: OUT0~OUT7
=
ON when Dn
=
“H”; OUT0~OUT7
=
OFF when Dn
=
“L”.
In order to ensure that the level of the power supply voltate is correct, an external resistor must be
connected between R-EXT and GND.
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2006-06-14
TB62710P/F/FN
Timing Diagram
n
=
1
CLOCK
0V
5V
SERIAL-IN
0V
5V
LATCH
0V
5V
ENABLE
0V
2
3
4
5
6
7
8
5V
OUT0
OFF
OUT1
OFF
ON
OFF
OUT6
OFF
OUT7
OFF
ON
OFF
5V
SERIAL-OUT1
0V
5V
SERIAL-OUT2
0V
Note 2: The latches circuit holds data by pulling the
LATCH
terminal Low.
And, when
LATCH
terminal is a “H” level, latch circuit doesn’t hold data, and it passes from the input to the
output.
When
ENABLE
terminal is a “L” level, output terminal OUT0~ OUT7 respond to the data, and on & off does.
And, when
ENABLE
terminal is a “H” level, it offs with the output terminal regardless of the data.
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2006-06-14
TB62710P/F/FN
Terminal Description
Pin No.
P/FN-Type
1
2
3
4
6, 15
7~14
F-Type
1
2
3
5
7, 18
9~16
GND
SERIAL-IN
CLOCK
LATCH
V
CC
OUT0~OUT7
GND terminal for control logic
Input terminal for serial data for data shift register
Input terminal for clock for data shift on rising edge
Input terminal for data strobe
When the LATCH input is driven High, data is latched. When it is pulled Low, data
is hold.
0 V~17 V supply voltage terminal for LED
Output terminals
Input terminal for output enable.
17
21
ENABLE
All outputs (OUT0~OUT7) are turned off, when the ENABLE terminal is driven
High.
And are turned on, when the terminal is driven Low.
16
18
19
20
5
20
22
23
24
4, 6, 8,
17, 19
SERIAL-OUT2 Output terminal for serial data input on SERIAL-IN terminal
SERIAL-OUT1 Output terminal for serial data input on SERIAL-IN terminal
R-EXT
V
DD
NC
Input terminal used to connect an external resistor. This regulated the output current.
5-V supply voltage terminal
Not connected
Pin Name
Function
Equivalent Circuits For Inputs and Outputs
ENABLE terminal
V
DD
R (UP)
LATCH terminal
V
DD
300 k
ENABLE
LATCH
GND
GND
R (DOWN)
CLOCK, SERIAL-IN terminal
V
DD
SERIAL-OUT1 and SERIAL-OUT2 terminals
V
DD
CLOCK,
SERIAL-IN
200 k
SERIAL-OUT1, 2
GND
GND
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2006-06-14
TB62710P/F/FN
Absolute Maximum Ratings
(T
opr
=
25°C)
Characteristic
Supply voltage
Supply voltage for LED
Input voltage
Output current
Output voltage
Clock frequency
V
CC
terminal current
P-type
(when not mounted)
Power
Dissipation
F-type
(when not mounted)
Symbol
V
DD
V
LED
V
IN
I
OUT
V
OUT
f
CLK
IV
CC
P
d1
Rating
0~7.0
0~17.0
Unit
V
V
V
mA
V
MHz
mA
−
0.4~V
DD
+
0.4
−
90
−
0.4~17
15
1440
1.47
0.59
0.83
P
d2
(Note 3) F-type (on PCB)
FN-type
(when not mounted)
FN-type (on PCB)
P-type
(when not mounted)
Thermal
Resistance
(Note 3)
F-type
(when not mounted)
F-type (on PCB)
FN-type
(when not mounted)
FN-type (on PCB)
Operating Temperature
Storage Temperature
T
opr
T
stg
R
th (j-a) 3
R
th (j-a) 1
P
d3
W
0.71
0.96
85
210
150
175
130
°C/W
R
th (j-a) 2
−
40~85
−
55~150
°C
°C
Note 3: P-Type: Powes dissipation is derated by 12.5 mW/°C if device is mounted on PCB and ambient temperature
is above 25°C.
F-Type: Powes dissipation is derated by 6.7 mW/°C if device is mounted on PCB and ambient temperature is
above 25°C.
With device mounted on PCB of 60% Cu and of dimensions 50 mm
×
50 mm
×
1.6 mm
FN-Type: Powes dissipation is derated by 7.7 mW/°C if device is mounted on PCB and ambient temperature
is above 25°C.
With device mounted on PCB of 40% Cu and of dimensions 50 mm
×
50 mm
×
1.6 mm
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2006-06-14
Embedded System
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