TC62D776CFG

TC62D776CFG
TOSHIBA CMOS Integrated Circuit Silicon Monolithic
TC62D776CFG
16-Channel Constant-Current LED Driver of the 3.3-V and 5-V Power Supply
The TC62D776CFG is a constant-current driver for LED and
LED display lighting applications.
The output current from each of the 16 outputs is programmable
via a single external resistor.
The TC62D776CFG contains a 16-channel shift register, a
16-channel latch, a 16-channel AND gate and a 16-channel
constant-current output.
Fabricated with a CMOS process, the TC62D776CFG allows
high-speed data transfer.
It operates with a 3.3- or 5-V power supply.
.
SSOP24-P-300-1.00B
Weight : 0.32g Typ.
Features
● Supply voltage
: VDD = 3.0 to 5.5 V
● 16-output built-in
● Output current setup range
: IOUT = 1.5 to 90 mA
● Constant current output accuracy (@ REXT = 1.2 kΩ, VOUT = 1.0 V, VDD = 3.3 V, 5.0 V)
: S rank; between outputs ± 1.5 % (max)
: S rank; between devices ± 1.5 % (max)
: N rank; between outputs ± 2.5 % (max)
: N rank; between devices ± 2.5 % (max)
●Output voltage
: VOUT = 17 V (max)
● I/O interface
: CMOS interfaces (Schmitt trigger input)
● Data transfer frequency
: fSCK = 25 MHz (max)
● Operation temperature range
: Topr = −40 to 85 °C
● 8-bit (256 steps) current correction function built-in.
1 bit (HC) by the MSB side: Selects the output current range.
7 bit by the LSB side: Output current is adjusted at 128 steps in the range of 11% to 45%. (In the case of HC=1)
Output current is adjusted at 128 steps in the range of 50% to 200%. (In the case of HC=0)
● Thermal shutdown function (TSD) built-in.
● Output error detection function built-in.
Auto-output error detection and manual-output error detection using commands
Output open detection function (OOD) and output short detection function (OSD) built-in.
● Power-on-reset function built-in. (When the power supply is turned on, internal data is reset)
● Stand-by function built-in. (IDD = 1μA at standby mode)
● Output delay function built-in. (Output switching noise is reduced)
● Package
: SSOP24-P-300-1.00B
For detailed part naming conventions, contact your local Toshiba sales representative or distributor.
1
2011-12-07
TC62D776CFG
Block Diagram
OUT0
OUT1
OUT15
Error detection
result data
register
Error detection circuit
TSD
circuit
Constant current output circuit
Reference
voltage
circuit
Output delay circuit
8bit DAC
ON/OFF data register
State
setting
register
ENABLE
16
Data transfer control circuit
Command
control
circuit
TRANS
16
SIN
R-EXT
16
16
SOUT
selection
circuit
16-bit shift registor
F/F
SOUT
VDD
POR
circuit
SCK
GND
Pin Assignment (top view)
GND
SIN
SCK
TRANS
OUT0
VDD
R-EXT
SOUT
ENABLE
OUT1
OUT15
OUT14
OUT2
OUT3
OUT13
OUT12
OUT4
OUT11
OUT5
OUT6
OUT9
OUT7
OUT8
OUT10
2
2011-12-07
TC62D776CFG
Terminal Description
Pin No.
Pin Name
Function
1
GND
GND terminal
2
SIN
Serial data input terminal
3
SCK
Serial data transfer clock input terminal
4
TRANS
Data transfer command input terminal
5
OUT0
Constant-current output terminal
6
OUT1
Constant-current output terminal
7
OUT2
Constant-current output terminal
8
OUT3
Constant-current output terminal
9
OUT4
Constant-current output terminal
10
OUT5
Constant-current output terminal
11
OUT6
Constant-current output terminal
12
OUT7
Constant-current output terminal
13
OUT8
Constant-current output terminal
14
OUT9
Constant-current output terminal
15
OUT10
Constant-current output terminal
16
OUT11
Constant-current output terminal
17
OUT12
Constant-current output terminal
18
OUT13
Constant-current output terminal
19
OUT14
Constant-current output terminal
20
OUT15
Constant-current output terminal
21
ENABLE
22
SOUT
Serial data output terminal.
23
R-EXT
An external resistance for an output current setup is connected between this terminal and ground.
24
VDD
An output current enable signal input terminal
In "H" level input, outputs are turned off compulsorily.
In "L" level input, outputs are ON/OFF controlled according to serial data.
Power supply terminal
3
2011-12-07
TC62D776CFG
Equivalent Circuits for Inputs and Outputs
ENABLE Terminal
VDD
TRANS Terminal
R (UP)
VDD
ENABLE
TRANS
GND
GND
SCK and SIN Terminals
R (DOWN)
SOUT Terminal
VDD
VDD
SCK
SIN
SERIAL-OUT
GND
GND
OUT0 to OUT15 Terminals
OUT0 to OUT15
GND
4
2011-12-07
TC62D776CFG
Timing Diagram
n=0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
H
SCK
L
H
SIN
L
H
TRANS
L
H
ENABLE
L
ON
OUT0
OFF
ON
OUT1
OFF
ON
OUT2
OFF
ON
OUT15
OFF
SOUT
H
L
The TC62D776CFG can operate with a 3.3- or 5.0-V power supply. The same voltage must be supplied to the power
and signal (SCK/SIN/TRANS/ ENABLE ) domains.
5
2011-12-07
TC62D776CFG
The explanation of the function (Basic data input pattern)
Data is serially loaded into the TC62D776CFG using the SIN and SCK inputs. Command selection is
done via the SCK and TRANS inputs.
About the operation of each command
Symbol
Num of SCK at
TRANS=”H”
(Note2)
Operation
S0
0,1
Input of output ON/OFF data.
S1
5,6
Executes output open/short detection manually. (Note1)
Transfers the result of open/short detection to the 16-bit Shift Register. (Note1)
S2
S3
7,8
9,10
Input of state setting data (1).
Input of state setting data (2).
Note 1: When output open/short detection is enabled.
Note 2: SCK pulse trains other than those shown above are not recognized as commands.
•S0 command (Input of output ON/OFF data.)
SCK
TRANS
SIN
１
The number of SCK pulses at TRANS="H" is 0 or 1.
OUTPUT ON/OFF DATA
•S1 command (Output open/short detection function manual operation is executed.)
The number of SCK pulses at TRANS="H" is 5 or 6
•S2 command (Input of state setting data (1).)
The number of SCK pulses at TRANS="H" is 7 or 8
•S3 command (Input of state setting data (2).)
The number of SCK pulses at TRANS="H" is 9 or 10
6
2011-12-07
TC62D776CFG
About the operation of each command
S0 command (Input of output ON/OFF data.)
Description
If SCK pulses High zero or one time while TRANS is High, it is interpreted as the S0 command, which
acts as follows.
Basic input pattern of S0 command
Input form of output ON/OFF data
MSB
D15
D14
D13
D12
D11
LSB
D10
D9
OUT15 OUT14 OUT13 OUT12 OUT11 OUT10 OUT9
D8
D7
D6
D5
D4
D3
D2
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT2
D1
D0
OUT1 OUT0
Input in MSB first.
Output ON/OFF data setting
Input Data
1
0
Default after power-on
Setting
Output turn on
Output turn off
Data
Setting
0
Output turn off
Automatic Error Detection Mode
If output open/short detection is enabled, its result is automatically transferred from the Error Detection
Result register to the 16-bit Shift Register, which can be shifted out from the SOUT pin.
Output open/short detection can be enabled with the S3 command.
Open/short errors can be detected only for output channels that are enabled for at least 800 ns (Note 1) and
are configured to be turned on. For the disabled output channels, the detection result will be 1 (normal). If the
output channels stay on for no longer than 800 ns, the automatic error detection result will be invalid; in this
case, the detection results of all channels will be 1 (normal).
Note 1: Automatic error detection is triggered by the falling edge of the ENABLE signal. Thus, this feature can
not be used when ENABLE is tied Low.
In the figure shown below, the outputs are enabled for over 800 ns during the Terr2 period, but the automatic
error detection result is invalid; thus, it should be kept in mind that the detection results will be 1 (normal) for
all channels.
7
2011-12-07
TC62D776CFG
Output form of output opening/short detection result data
The result of output open/short detection is transferred to the 16-bit Shift Register in the format shown
below.
MSB
LSB
E15 E14 E13 E12 E11 E10 E9
E8
E7
E6
E5
E4
E3
E2
E1
E0
OUT15 OUT14 OUT13 OUT12 OUT11 OUT10 OUT9
OUT8
OUT7
OUT6
OUT5
OUT4
OUT3
OUT1 OUT0
OUT2
Error code (when output open detection function is effective)
Judging in error detection
Error code
Condition of output terminal
VOOD≥VOUT
VOOD<VOUT
0
1
Open
Normal
Error code (when output short detection function is effective)
Judging in error detection
Error code
Condition of output terminal
VOSD≤VOUT
VOSD>VOUT
0
1
short-circuit
Normal
Error code (when output open/short detection function is effective)
Judging in error detection
Error code
Condition of output terminal
VOOD≥VOUT or VOSD≤VOUT
0
Open or short-circuit
VOOD<VOUT or VOSD>VOUT
1
Normal
*When both output error detection function is effective, Open and short-circuit are undistinguishable.
Basic input pattern of S0 command（When output opening/short detection is effective.）
After the S0 command is loaded, the first SCK pulse (marked X above) is used to transfer an error detection
result to the 16-bit Shift Register. At this time, the TC62D776CFG ignores the SIN input.
8
2011-12-07
TC62D776CFG
S1 command (Output open/short detection function manual operation is executed.)
Description
If SCK pulses High five or six times while TRANS is High, it is interpreted as the S1 command, which acts as
follows.
If output open/short detection is enabled, a current of approximately 60 μA is forced to flow to all the outputs
during the tON(S1) period in order to perform open/short detection. tON(S1) is approximately 800 ns long.
Its result is immediately transferred to the 16-bit Shift Register, which can be shifted out from the SOUT pin.
The format used to transfer the detection result is the same as for the S0 command.
Output open/short detection can be enabled with the S3 command.
Note: The S1 command should be loaded when the outputs are off. The S1 command is not executed if it is
loaded when ENABLE = Low.The S1 command is not also executed when output open/short detection
is disabled.
SCK should not be applied during the tON(S1) period.
Basic input pattern of S1 command
After the S1 command is loaded, the first SCK pulse (marked X above) is used to transfer an error detection
result to the 16-bit Shift Register. At this time, the TC62D776CFG ignores the SIN input.
9
2011-12-07
TC62D776CFG
S2 command (Input of state setting data (1).)
Description
If SCK pulses High seven or eight times while TRANS is High, it is interpreted as the S0 command, which
acts as follows.
The TC62D776CFG transfers the state control data (1) from the 16-bit Shift Register to the State Control
register.
The states that can be programmed with the S2 command are shown below.
Basic input pattern of S2 command)
Input form of state setting data (1)
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
A7
A6
A5
A4
A3
A2
A1
A0
R0
S0
T0
U0
-
-
H0
L0
*Input in MSB first.
*Please input "L" data to D7 to D2.
State setting data (1) setting
Setting bit
A7
A6 to A0
R0 to U0
H0
L0
Input data
Outline of command
0
1
Setting of
High set mode
Low set mode
current correction range
50% to 200%
11% to 45%
Setting of
Refer to attached table.
current correction data
TEST Mode setting. Please input "L" data.
Data Initialization
Normal
Initialization
Setting of
Normal
Active
standby mode (1)
10
Default after
power-on
High set mode
50% to 200%
100%
"L"
Normal
Normal
2011-12-07
TC62D776CFG
Details of each setting
A setting (setting of current correction data)
1. In the case of a high setting mode (50% to 200%)
A[6]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A[5]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A[4]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
A[3]
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
A[2]
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A[1]
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
A[0]
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Current gain(%)
200.00
198.82
197.64
196.46
195.28
194.09
192.91
191.73
190.55
189.37
188.19
187.01
185.83
184.65
183.46
182.28
181.10
179.92
178.74
177.56
1
1
0
1
0
1
1
176.38
0
1
0
1
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
175.20
174.02
172.83
171.65
170.47
169.29
168.11
166.93
165.75
164.57
163.39
162.20
161.02
159.84
158.66
157.48
156.30
155.12
153.94
152.76
151.57
150.39
149.21
148.03
146.85
145.67
144.49
143.31
142.13
140.94
139.76
138.58
137.40
136.22
135.04
133.86
132.68
131.50
130.31
129.13
127.95
126.77
125.59
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
11
A[6]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[5]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A[4]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
A[3]
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
A[2]
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
A[1]
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
A[0]
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Current gain(%)
124.41
123.23
122.05
120.87
119.69
118.50
117.32
116.14
114.96
113.78
112.60
111.42
110.24
109.06
107.87
106.69
105.51
104.33
103.15
101.97
100.79
(Default)
99.61
98.43
97.24
96.06
94.88
93.70
92.52
91.34
90.16
88.98
87.80
86.61
85.43
84.25
83.07
81.89
80.71
79.53
78.35
77.17
75.98
74.80
73.62
72.44
71.26
70.08
68.90
67.72
66.54
65.35
64.17
62.99
61.81
60.63
59.45
58.27
57.09
55.91
54.72
53.54
52.36
51.18
50.00
2011-12-07
TC62D776CFG
2. In the case of a low setting mode (11% to 45%)
A[6]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
A[5]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[4]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[3]
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
A[2]
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
A[1]
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
A[0]
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Current gain(%)
45.00
44.73
44.46
44.20
43.93
43.66
43.39
43.13
42.86
42.59
42.32
42.06
41.79
41.52
41.25
40.98
40.72
40.45
40.18
39.91
39.65
39.38
39.11
38.84
38.57
38.31
38.04
37.77
37.50
37.24
36.97
36.70
36.43
36.17
35.90
35.63
35.36
35.09
34.83
34.56
34.29
34.02
33.76
33.49
33.22
32.95
32.69
32.42
32.15
31.88
31.61
31.35
31.08
30.81
30.54
30.28
30.01
29.74
29.47
29.20
28.94
28.67
28.40
28.13
12
A[6]
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[5]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[4]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
A[3]
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
A[2]
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
A[1]
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
A[0]
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
Current gain(%)
27.87
27.60
27.33
27.06
26.80
26.53
26.26
25.99
25.72
25.46
25.19
24.92
24.65
24.39
24.12
23.85
23.58
23.31
23.05
22.78
22.51
22.24
21.98
21.71
21.44
21.17
20.91
20.64
20.37
20.10
19.83
19.57
19.30
19.03
18.76
18.50
18.23
17.96
17.69
17.43
17.16
16.89
16.62
16.35
16.09
15.82
15.55
15.28
15.02
14.75
14.48
14.21
13.94
13.68
13.41
13.14
12.87
12.61
12.34
12.07
11.80
11.54
11.27
11.00
2011-12-07
TC62D776CFG
R, S, T, U setting (Setting of Test Mode)
R, S, T, U[0]
0
1
Setting of Test Mode
Normal operation mode. (Default after power-on)
Test Mode.
H setting (Setting of Initialization）
H[0]
0
1
Setting of Initialization
Normal operation mode (Default after power-on)
Initializes all the internal data of the IC.
After initialization, the TC62D776CFG returns to normal operation mode.
L setting (Setting of standby mode (1))
L[0]
0
1
Setting of standby mode (1)
Normal operation mode (Default after power-on)
Standby mode
Disables all circuits except digital logic, reducing the supply current of the IC.
(All data in the TC62D776CFG is retained, and data can be loaded into the
TC62D776CFG.)
Loading the S0 command in Standby mode causes the TC62D776CFG to return to
normal operation mode.
13
2011-12-07
TC62D776CFG
S3 command (Input of state setting data (2).)
Description
If SCK pulses High nine or ten times while TRANS is High, it is interpreted as the S3 command, which acts
as follows.
The TC62D776CFG transfers the state control data (2) from the 16-bit Shift Register to the State Control
register.
The states that can be programmed with the S3 command are shown below.
Basic input pattern of S3 command)
SCK
１
2
3
4
5
6
7
8
D8
K0
D7
M0
D6
N0
D5
O0
D4
P0
D3
Q0
D2
-
9
10
TRANS
SIN
SOUT
D15 D14 D13 D12 D11 D10
C0 D0 E0 F0 G0 I0
D9
J0
D1
-
D0
-
Previous Data
D15
D14 D13 D12
Previous Data
D15
D14 D13
(In case of J0=0)
SOUT
(In case of J0=1)
Command execution
Input form of state setting data (2)
MSB
LSB
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
C0
D0
E0
F0
G0
I0
J0
K0
M0
N0
O0
D4
P0
D3
Q0
D2
-
D1
-
D0
-
*Input in MSB first.
*Please input "L" data to D8 to D0.
State setting data (2) setting
Setting bit
C0
D0
E0
F0
G0
I0
J0
K0 to Q0
Input data
Outline of command
0
Setting of
Active
thermal shutdown function (TSD)
Setting of
Not Active
output open detection function (OOD)
Setting of
Not Active
output short detection function (OSD)
Setting of
Normal
standby mode (2)
Operation
Setting of
VOSD1
output short detection voltage
Setting of
Active
output deLay function of output terminal
Setting of
Up↑
SCK trigger of SOUT
TEST Mode setting. Please input "L" data.
14
1
Default after
power-on
Not Active
Active
Active
Not Active
Active
Not Active
Active
Normal
Operation
VOSD2
VOSD1
Not Active
Active
Down↓
Up↑
"L"
2011-12-07
TC62D776CFG
Details of each setting
C setting (Setting of thermal shutdown function (TSD))
C[0]
Setting of thermal shutdown function
Enables thermal shutdown. (Default after power-on)
Disables thermal shutdown.
0
1
D setting (Setting of output open detection function (OOD))
D[0]
Setting of output open detection function
0
1
Disables output error detection. (Default after power-on)
Enables output error detection.
E setting (Setting of output short detection function (OSD))
E[0]
Setting of output short detection function
0
1
Disables output error detection. (Default after power-on)
Enables output error detection.
F setting (Setting of standby mode (2))
F[0]
Setting of standby mode (2)
0
Normal operation mode. (Default after power-on)
Pre standby mode.
Condition 1: Enters Standby mode when the contents of the Latch become all-0s
in normal operation mode.
This disables all circuits except digital logic, reducing the supply current
of the IC.(All data in the TC62D776CFG is retained, and data
1
can be loaded into the TC62D776CFG.)
Condition 2: Other than Condition 1
The TC62D776CFG operates the same way as normal
operation mode.
G setting (Setting of output short detection voltage)
G[0]
Setting of output short detection voltage
0
1
VOSD1 (Default after power-on)
VOSD2
I setting (Setting of output delay function of output terminal)
I[0]
Setting of output delay function of output terminal
0
1
Disables output delay function. (Default after power-on)
Enables output delay function.
J setting (Setting of SCK trigger of SOUT)
J[0]
Setting of SCK trigger of SOUT
0
1
Data output trigger of SOUT is up edge of SCK (Default after power-on)
Data output trigger of SOUT is down edge of SCK
K,M,N,O,P,Q setting (Setting of Test Mode)
K,M,N,O,P,Q[0]
0
1
Setting of Test Mode
Normal operation mode. (Default after power-on)
Test Mode.
15
2011-12-07
TC62D776CFG
Thermal shutdown function (TSD)
If the internal temperature of the IC exceeds 150°C, the thermal shutdown (TSD) circuitry trips, turning off all
constant-current outputs. When the temperature drops below the TSD release threshold, the TC62D776CFG
restarts constant-current output.
Since TSD is not intended to protect the IC against permanent damage. it should not be employed actively to
monitor chip temperature.
Output delay function
In order to reduce di/dt caused by simultaneously switching outputs, the TC62D776CFG allows for delays
(tDLY (ON), tDLY (OFF)) between contiguous outputs.
Switching time difference between outputs are provided in order as follows;
OUT0 → OUT15 → OUT7 → OUT8 → OUT1 → OUT14 → OUT6 → OUT9 → OUT2 → OUT13 →
OUT5 → OUT10 → OUT3 → OUT12 → OUT4 → OUT11
Power on reset function (POR)
The TC62D776CFG provides a power-on reset to reset all internal data in order to prevent malfunctions.
The POR circuitry works properly only when VDD rises from 0 V. To re-activate the POR circuitry, VDD must be
brought to less than 0.1 V. Internal data is guaranteed to be retained after VDD exceeds 3.0 V.
VDD waveform
VDD=3.0V
VDD voltage for guaranteed data
VDD=2.8 V
VDD voltage for end of reset
VDD=0.1 V
End of POR
VDD=0 V
POR working range
Beyond POR working range
16
POR working range
2011-12-07
TC62D776CFG
Absolute Maximum Ratings (Ta = 25°C)
Symbol
Rating
Unit
Supply voltage
VDD
6.0
V
Output current
IOUT
95
mA
Logic input voltage
VIN
−0.3 to VDD + 0.3 (Note 1)
V
Output voltage
VOUT
−0.3 to 17
V
Operating temperature
Topr
−40 to 85
°C
Storage temperature
Thermal resistance
Power dissipation
Tstg
−55 to 150
°C
Rth(j-a)
PD
94 (Note 2)
1.32 (Notes 2 and 3)
°C/W
W
Characteristics
Note 1: However, do not exceed 6.0 V.
Note 2: When mounted on a PCB (76.2 × 114.3 × 1.6 mm; Cu = 30%; 35-μm-thick; SEMI-compliant)
Note 3: Power dissipation is reduced by 1/Rth (j-a) for each °C above 25°C ambient.
Operating Ranges (unless otherwise specified, VDD = 3.0 to 5.5 V, Ta = −40°C to 85°C)
Characteristics
Symbol
Test Conditions
Min
Typ.
Max
Unit
Supply voltage
VDD
⎯
3.0
⎯
5.5
V
High level logic input voltage
VIH
Test terminal are
SIN, SCK, TRANS, ENABLE
0.7×VDD
⎯
VDD
V
Low level logic input voltage
VIL
Test terminal are
SIN, SCK, TRANS, ENABLE
GND
⎯
0.3×VDD
V
High level SOUT output current
IOH
⎯
⎯
⎯
−1
mA
Low level SOUT output current
IOL
⎯
⎯
⎯
1
mA
Constant current output
IOUT
1.5
⎯
90
mA
Test terminal is OUTn
17
2011-12-07
TC62D776CFG
AC Characteristics (Unless otherwise noted, VDD = 5.0 V, Ta = 25 °C)
Characteristics
Symbol
Serial data transfer frequency
fSCK
SCK pulse width
twSCK
TRANS pulse width
ENABLE pulse width
Serial data setup time
Serial data hold time
twTRANS
twENA
Test Conditions
Min
Typ.
Max
Unit
Cascade connect
⎯
⎯
25
MHz
SCK=“H” or “L”
20
⎯
⎯
ns
TRANS=“H”
20
⎯
⎯
ns
25
⎯
⎯
ns
ENABLE =“H”
or “L”
REXT =200 Ω to 12 kΩ
tSETUP1
Test terminal are SIN-SCK
1
⎯
⎯
tSETUP2
Test terminal are TRANS-SCK
5
⎯
⎯
tHOLD1
Test terminal are SIN-SCK
3
⎯
⎯
tHOLD2
Test terminal are TRANS-SCK
7
⎯
⎯
Min
Typ.
Max
Unit
ns
ns
AC Characteristics (Unless otherwise noted, VDD = 3.3 V, Ta = 25 °C)
Characteristics
Symbol
Serial data transfer frequency
fSCK
Cascade connect
⎯
⎯
25
MHz
SCK pulse width
twSCK
SCK=“H” or “L”
20
⎯
⎯
ns
TRANS=“H”
20
⎯
⎯
ns
25
⎯
⎯
ns
TRANS pulse width
ENABLE pulse width
Serial data setup time
Serial data hold time
twTRANS
twENA
Test Conditions
ENABLE =“H”
or “L”
REXT =200 Ω to 12 kΩ
tSETUP1
Test terminal are SIN-SCK
1
⎯
⎯
tSETUP2
Test terminal are TRANS-SCK
5
⎯
⎯
tHOLD1
Test terminal are SIN-SCK
3
⎯
⎯
tHOLD2
Test terminal are TRANS-SCK
7
⎯
⎯
18
ns
ns
2011-12-07
TC62D776CFG
Electrical Characteristics (Unless otherwise specified, VDD = 5.0 V ,Ta = 25°C)
Symbol
Test
Circuit
High level
SOUT output voltage
VOH
1
Low level
SOUT output voltage
VOL
1
High level logic input
current
IIH
2
Low level logic input
current
IIL
Characteristics
Min
Typ.
Max
Unit
IOH=−1mA
VDD −
0.3
⎯
VDD
V
IOL=+1mA
GND
⎯
0.3
V
VIN = VDD
Test terminal are
ENABLE , SIN, SCK
⎯
⎯
1
μA
3
VIN = GND
Test terminal are
SIN, SCK, TRANS
⎯
⎯
-1
μA
IDD1
4
Stand-by mode, VOUT=1.0V,
SCK=“L”
⎯
⎯
1.0
μA
IDD2
4
VOUT=1.0V, REXT=1.2kΩ,
All output off
⎯
⎯
7.0
mA
Constant current error
(IC to IC) (S rank)
ΔIOUT(IC)
5
⎯
±1.0
±1.5
%
Constant current error
(Ch to Ch) (S rank)
ΔIOUT(Ch)
5
⎯
±1.0
±1.5
%
Constant current error
(IC to IC) (N rank)
ΔIOUT(IC)
5
⎯
±1.0
±2.5
%
Constant current error
(Ch to Ch) (N rank)
ΔIOUT(Ch)
5
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±1.0
±2.5
%
IOK
5
VOUT=17V, REXT=1.2kΩ, OUTn off
⎯
⎯
0.5
μA
%VDD
5
VDD=4.5 to 5.5V, VOUT=1.0V,
REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±1
±5
%/V
%VOUT
5
VOUT=1.0 to 3.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±0.1
±0.5
%/V
R (Up)
3
Test terminal is
ENABLE
240
300
360
kΩ
R (Down)
2
Test terminal is TRANS
240
300
360
kΩ
VOOD
7
REXT=200Ω to 12kΩ
0.2
0.3
0.4
V
VOSD1
7
REXT=200Ω to 12kΩ
VDD −
1.3
VDD −
1.4
VDD −
1.5
0.525 0.55 ×
× VDD
VDD
Ta=-40 to +85°C
Power supply current
Output OFF leak
current
Constant current
output power supply
voltage regulation
Constant current
output output voltage
regulation
Pull-up resistor
Pull-down resistor
OOD voltage
Test Conditions
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
OSD voltage
V
VOSD2
7
REXT=200Ω to 12kΩ
0.5 ×
VDD
TSD start temperature
TTSD(ON)
⎯
Junction temperature
150
⎯
⎯
°C
Return time of normal
mode
from SHDN
mode
tON
⎯
Time until output current after it
becomes the Normal mode from
SHDN mode flows
⎯
⎯
30
μs
19
2011-12-07
TC62D776CFG
Electrical Characteristics (Unless otherwise specified, VDD = 3.3 V ,Ta = 25°C)
Symbol
Test
Circuit
High level
SOUT output voltage
VOH
1
Low level
SOUT output voltage
VOL
1
High level logic input
current
IIH
2
Low level logic input
current
IIL
Characteristics
Min
Typ.
Max
Unit
IOH=−1mA
VDD −
0.3
⎯
VDD
V
IOL=+1mA
GND
⎯
0.3
V
VIN = VDD
Test terminal are
ENABLE , SIN, SCK
⎯
⎯
1
μA
3
VIN = GND
Test terminal are
SIN, SCK, TRANS
⎯
⎯
-1
μA
IDD1
4
Stand-by mode, VOUT=1.0V,
SCK=“L”
⎯
⎯
1.0
μA
IDD2
4
VOUT=1.0V, REXT=1.2kΩ,
All output off
⎯
⎯
7.0
mA
Constant current error
(IC to IC) (S rank)
ΔIOUT(IC)
5
⎯
±1.0
±1.5
%
Constant current error
(Ch to Ch) (S rank)
ΔIOUT(Ch)
5
⎯
±1.0
±1.5
%
Constant current error
(IC to IC) (N rank)
ΔIOUT(IC)
5
⎯
±1.0
±2.5
%
Constant current error
(Ch to Ch) (N rank)
ΔIOUT(Ch)
5
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±1.0
±2.5
%
IOK
5
VOUT=17V, REXT=1.2kΩ, OUTn off
⎯
⎯
0.5
μA
%VDD
5
VDD=3.0 to 3.6V, VOUT=1.0V,
REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±1
±5
%/V
%VOUT
5
VOUT=1.0 to 3.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
⎯
±0.1
±0.5
%/V
R (Up)
3
Test terminal is ENABLE
240
300
360
kΩ
R (Down)
2
Test terminal is TRANS
240
300
360
kΩ
VOOD
7
REXT=200Ω to 12kΩ
0.2
0.3
0.4
V
VOSD1
7
REXT=200Ω to 12kΩ
VDD −
1.3
VDD −
1.4
VDD −
1.5
0.525 0.55 ×
× VDD
VDD
Ta=-40 to +85°C
Power supply current
Output OFF leak
current
Constant current
output power supply
voltage regulation
Constant current
output output voltage
regulation
Pull-up resistor
Pull-down resistor
OOD voltage
Test Conditions
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
VOUT=1.0V, REXT=1.2kΩ,
OUT0 to OUT15 , 1ch output on
OSD voltage
V
VOSD2
7
REXT=200Ω to 12kΩ
0.5 ×
VDD
TSD start temperature
TTSD(ON)
⎯
Junction temperature
150
⎯
⎯
°C
Return time of normal
mode
from SHDN
mode
tON
⎯
Time until output current after it
becomes the Normal mode from
SHDN mode flows
⎯
⎯
30
μs
20
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TC62D776CFG
Switching Characteristics (Unless otherwise specified, VDD = 5.0V ,Ta = 25°C)
Characteristics
Symbol
Test
Circ
Test Condition
uit
6 Up edge trigger mode
Min
Typ.
Max
6
16
30
SCK↑-SOUT
tPD1U
SCK↓-SOUT
tPD1D
6
Down edge trigger mode
2
12
16
ENABLE - OUTn
tPD2
6
REXT = 1.2kΩ
⎯
30
40
TRANS- OUTn
tPD3
6
ENABLE =“L”
⎯
30
40
Output rise time
tor
6
10% to 90% points of
OUT0 to OUT15 voltage
waveforms
―
10
20
Output fall time
tof
6
90% to 10% points of
OUT0 to OUT15 voltage
waveforms
―
10
20
tDLY (ON)
6
Reference timing
waveforms
1
4
9
tDLY (OFF)
6
Reference timing
waveforms
1
4
9
Propagation
delay time
Output delay time
Unit
ns
Switching Characteristics (Unless otherwise specified, VDD = 3.3 V ,Ta = 25°C)
Characteristics
Propagation
delay time
Symbol
Test
Circ
Test Condition
uit
6 Up edge trigger mode
Min
Typ.
Max
SCK↑-SOUT
tPD1U
6
16
30
SCK↓-SOUT
tPD1D
6
Down edge trigger mode
2
14
18
ENABLE - OUTn
tPD2
6
REXT = 1.2kΩ
⎯
30
40
TRANS- OUTn
tPD3
6
ENABLE =“L”
⎯
30
40
tor
6
10% to 90% points of
OUT0 to OUT15 voltage
waveforms
―
10
20
tof
6
90% to 10% points of
OUT0 to OUT15 voltage
waveforms
―
10
20
tDLY (ON)
6
Reference timing
waveforms
REXT = 1.2kΩ
2
6
12
tDLY (OFF)
6
Reference timing
waveforms
REXT = 1.2kΩ
2
6
12
Output rise time
Output fall time
Output delay time
21
Unit
ns
2011-12-07
TC62D776CFG
Test Circuits
Test Circuit 1: High level SOUT output voltage / Low level SOUT output voltage
ENABLE
SCK
OUT0
TRANS
OUT15
SIN
SOUT
GND
CL = 10.5 pF
IO = −1 mA to 1 mA
R-EXT
V
VDD = 5 V, 3.3V
F.G
VDD
Test Circuit 2: High level logic input current / Pull-down resistor
VIN = VDD
A
A
A
ENABLE
SCK
VDD
OUT0
TRANS
SOUT
GND
CL = 10.5 pF
R-EXT
VDD = 5.5 V, 3.3V
OUT15
SIN
A
Test Circuit 3: Low level logic input current / Pull-up resistor
A
A
VDD
OUT0
SCK
TRANS
OUT15
SIN
R-EXT
GND
SOUT
22
VDD = 5V, 3.3V
A
ENABLE
CL = 10.5 pF
A
2011-12-07
TC62D776CFG
Test Circuit 4: Supply Current
VDD
OUT0
TRANS
GND
SOUT
CL = 10.5 pF
REXT = 1.2 kΩ
R-EXT
VDD = 5 V, 3.3V
OUT15
SIN
VOUT = 1.0V
F.G
ENABLE
SCK
A
Test Circuit 5: Constant current error(IC to IC) / Constant current error(ch to ch)
Output OFF leak current
Constant current output power supply voltage regulation
Constant current output voltage regulation
VDD
OUT0
A
OUT15
A
SIN
SOUT
GND
CL = 10.5 pF
REXT = 1.2 kΩ
R-EXT
VDD = 4.5 to 5.5 V, 3 to 3.6V
TRANS
VOUT = 1V to 3V, 17V
F.G
ENABLE
SCK
Test Circuit 6: Switching Characteristics
ENABLE
OUT0
SCK
CL
TRANS
IOUT
SIN
CL = 10.5 pF
R-EXT
SOUT
GND
CL = 10.5 pF
REXT = 1.2 kΩ
VIH = VDD
VIL = 0 V
tr = tf = 10 ns
(10 to 90%)
23
VDD = 5 V, 3.3V
OUT15
VL = 5 V
F.G
RL=300Ω
VDD
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TC62D776CFG
Test Circuit 7: ODD and OSD voltage
F.G
SCK
SIN
VDD
OUT0
V
TRANS
OUT15
ENABLE
V
VOUT2
VDD =5 V, 3.3V
SOUT
VOUT1 = 1V
GND
CL = 10.5 pF
REXT = 200Ω, 12 kΩ
REXT
All outputs are configured to be on. One output is connected to VDS2, and the other outputs are connected to
VDS1.VOOD and VOSD are measured by changing VDS2 and monitoring the other output voltages and error
detection results from SOUT.
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TC62D776CFG
Timing Waveforms
1. SCK, TRANS, SIN, SOUT
2. TRANS, ENABLE , OUTn
3. OUTn
OUTn are Voltage waveform.
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TC62D776CFG
4. ENABLE , OUTn
OUTn are Voltage waveform.
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TC62D776CFG
Reference data
The above data is for reference only, not guaranteed. Careful evaluation is required prior to creating a
production design.
Output Current vs. External Resistor
IOUT I−O R
-EXT
REXT
90
80
Theoretical formula
70
IOUT (A) = 1.03 (V) ÷ REXT (Ω)) × 16.5
IO (mA)
IOUT (mA)
60
50
40
30
20
Ta=25°C
VOUT=1V
10
0
100
1000
10000
REXT (Ω)
This graph shows the characteristics per channel when all the outputs are on.
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TC62D776CFG
Reference data
The above data is for reference only, not guaranteed. Careful evaluation is required prior to creating a
production design.
Output current (IOUT) – Output voltage (VOUT)
IOUT - VOUT
VDD =3.3V,Ta=25℃,1chON
100
90
80
IOUT (mA)
70
60
50
40
30
20
10
0
0
0.5
1
1.5
VOUT (V)
2
2.5
3
2
2.5
3
IOUT - VOUT
VDD=5.0V,Ta=25℃,1chON
100
90
80
IOUT (mA)
70
60
50
40
30
20
10
0
0
0.5
1
1.5
VOUT (V)
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TC62D776CFG
Notes on design of ICs
1．Decoupling capacitors between power supply and GND
It is recommended to place decoupling capacitors between power supply and GND as close to the IC as
possible.
2．Output current setting resistors
When the output current setting resistors (REXT) are shared among multiple ICs, production design should
be evaluated carefully.
3．Board layout
Ground noise generated by output switching might cause the IC to malfunction if the ground line exhibits
inductance and resistance due to PC board traces and wire leads. Also, the inductance between the IC
output pins and the LED cathode pins might cause large surge voltage, damaging LEDs and the IC
outputs. To avoid this situation, PC board traces and wire leads should be carefully laid out.
4．Consult the latest technical information for mass production.
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TC62D776CFG
Package Dimensions
CFG Type
SSOP24-P-300-1.00B
Unit : mm
Weight : 0.32g Typ.
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TC62D776CFG
Notes on Contents
1. Block Diagrams
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for
explanatory purposes.
2. Equivalent Circuits
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory
purposes.
3. Timing Charts
Timing charts may be simplified for explanatory purposes.
4. Application Circuits
The application circuits shown in this document are provided for reference purposes only. Thorough
evaluation is required, especially at the mass production design stage.
Toshiba does not grant any license to any industrial property rights by providing these examples of
application circuits.
5. Test Circuits
Components in the test circuits are used only to obtain and confirm the device characteristics. These
components and circuits are not guaranteed to prevent malfunction or failure from occurring in the
application equipment.
IC Usage Considerations
Notes on handling of ICs
The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded,
even for a moment. Do not exceed any of these ratings.
Exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result
injury by explosion or combustion.
Use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of
over current and/or IC failure. The IC will fully break down when used under conditions that exceed
its absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise
occurs from the wiring or load, causing a large current to continuously flow and the breakdown can
lead smoke or ignition. To minimize the effects of the flow of a large current in case of breakdown,
appropriate settings, such as fuse capacity, fusing time and insertion circuit location, are required.
If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the design
to prevent device malfunction or breakdown caused by the current resulting from the inrush current at
power ON or the negative current resulting from the back electromotive force at power OFF. IC
breakdown may cause injury, smoke or ignition.
Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable,
the protection function may not operate, causing IC breakdown. IC breakdown may cause injury,
smoke or ignition.
Do not insert devices in the wrong orientation or incorrectly.
Make sure that the positive and negative terminals of power supplies are connected properly.
Otherwise, the current or power consumption may exceed the absolute maximum rating, and
exceeding the rating(s) may cause the device breakdown, damage or deterioration, and may result
injury by explosion or combustion.
In addition, do not use any device that is applied the current with inserting in the wrong orientation or
incorrectly even just one time.
Carefully select external components (such as inputs and negative feedback capacitors) and load
components (such as speakers), for example, power amp and regulator.
If there is a large amount of leakage current such as input or negative feedback condenser, the IC
output DC voltage will increase. If this output voltage is connected to a speaker with low input
withstand voltage, overcurrent or IC failure can cause smoke or ignition. (The over current can cause
smoke or ignition from the IC itself.) In particular, please pay attention when using a Bridge Tied Load
(BTL) connection type IC that inputs output DC voltage to a speaker directly.
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2011-12-07
TC62D776CFG
Points to remember on handling of ICs
(1)
Heat Radiation Design
In using an IC with large current flow such as power amp, regulator or driver, please design the device
so that heat is appropriately radiated, not to exceed the specified junction temperature (TJ) at any time
and condition. These ICs generate heat even during normal use. An inadequate IC heat radiation
design can lead to decrease in IC life, deterioration of IC characteristics or IC breakdown. In addition,
please design the device taking into considerate the effect of IC heat radiation with peripheral
components.
(2)
Back-EMF
When a motor rotates in the reverse direction, stops or slows down abruptly, a current flow back to the
motor’s power supply due to the effect of back-EMF. If the current sink capability of the power supply
is small, the device’s motor power supply and output pins might be exposed to conditions beyond
absolute maximum ratings. To avoid this problem, take the effect of back-EMF into consideration in
system design.
(3) Thermal Shutdown Circuit
Thermal shutdown circuits do not necessarily protect ICs under all circumstances. If the
thermal shutdown circuits operate against the over temperature, clear the heat generation
status immediately.
Depending on the method of use and usage conditions, such as exceeding absolute
maximum ratings can cause the thermal shutdown circuit to not operate properly or IC
breakdown before operation.
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TC62D776CFG
RESTRICTIONS ON PRODUCT USE
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in this document, and related hardware, software and systems (collectively “Product”) without notice.
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responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and
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injury or damage to property, including data loss or corruption. Before customers use the Product, create designs including the Product,
or incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of all
relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes for
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