tb62778fng Marktech Optoelectronics, tb62778fng Datasheet - Page 17

• Manufacturer Part Number: tb62778fng
• Description: 8-channel Constant-current Led Driver Of The 3.3-v And 5-v Power Supply Voltage Operation
• Manufacturer: Marktech Optoelectronics

Output current vs. Dirating (lighting rate) graph
PCB Conditions: 76.2 × 114.3 × 1.6 mm, Cu = 30%, 35- µ m Thick, SEMI-Compliant
Output Current vs. External Resistor
characteristics of the device. Each product design should be fully evaluated in the real-world environment.
The above graphs are presented merely as a guide and does not constitute any guarantee as to the performance or
100
50
45
40
35
30
25
20
15
10
90
80
70
60
50
40
30
20
10
5
0
0
100
0
All outputs ON
Ta = 25°C
V
ON PCB
All outputs ON
Ta = 85°C
V
V
OUT
DD
OUT
= 5.0 V
= 0.7 V
= 1.0 V
20
Duty − Turn-ON rate (%)
I
OUT
I
OUT
40
− Duty ON PCB
R
I
OUT
EXT
1000
− R
- R
( Ω )
EXT
60
EXT
80
10000
100
(typ.)
TENTATIVE
17
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
50
Pd-Ta
T
a
(°C)
100
(Ver.0.0) 08-02-07
TB62778FNG
150