tb62725bpg Marktech Optoelectronics, tb62725bpg Datasheet - Page 12

• Manufacturer Part Number: tb62725bpg
• Description: 8?bit?constant ?current?led?driver?of?the?3.3?v?and?5?v?power?supply?voltage?operation
• Manufacturer: Marktech Optoelectronics

Application Circuit (example 3): When the condition of V
V
Surplus V
It is the one way of being effective to build in the r3 in this problem.
r3 can make a calculation to the formula r3 (ohms) = surplus V
Though the resistance parts increase, the fixed constant current performance is kept.
OUT
= V
C.U.
LED
OUT
- V
causes an IC fever and the useless consumption electric power.
f
= 0.7 to 1.0 V is the most suitable for V
SCAN
SERIAL­IN
ENABLE
LATCH
CLOCK
r2
O1
Constant­sink­current drivers
TB62725BPG/BFG/BFNG
8­bit SIPO, Latches and
O2
OUT
.
OUT
O5
/I
OUT
O6
.
LED
O7
r3
is V
SERIAL­OUT
12
f
+ 0.7 < V
SERIAL­IN
ENABLE
LED
LATCH
CLOCK
< 17 V.
Example)
TD62M8600: 8­bit multi­chip PNP transistor array,
which is not used in static lighting system.
Constant­sink­current drivers
TB62725BPG/BFG/BFNG
8­bit SIPO, Latches and
O1 O2
O5 O6 O7
TB62725BPG/BFG/BFNG
r3
SERIAL­OUT
2005­04­20
V
LED
= 15 V