TENTATIVE
TOSHIBA Bi-CMOS Integrated Circuit
Silicon Monolithic
TB62778FNG
TB62778FNG
8-Channel Constant-Current LED Driver of the 3.3-V and 5-V Power Supply Voltage
Operation
The TB62778FNG is comprised of constant-current drivers
designed for LEDs and LED panel displays.
The regulated current sources are designed to provide a constant
current, which is adjustable through one external resistor.
The TB62778FNG incorporates eight channels of shift registers,
latches, AND gates and constant-current outputs.
Fabricated using the Bi-CMOS process, the TB62778FNG
satisfies the system requirement of high-speed data transmission.
The TB62778FNG is RoHS.
Weight: 0.07 g (typ.)
Features
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Power supply voltages: V
DD
=
3.3 V/5 V
Output drive capability and output count: 50 mA
×
8 channels
Constant-current output range: 5 to 40 mA
Voltage applied to constant-current output terminals: 0.4 V (I
OUT
=
5 to 40 mA)
Current adjustment (via 7-bit serial data): The MSB, or the HC bit, selects the output current range:
25% to 50% range when HC
=
0 or 50% to 100% range when HC
=
1
The six LSB bits are used to adjust the current in 64 steps within the selected range.
Designed for common-anode LEDs
Thermal shutdown (TSD)
Power on reset (POR)
Output-open detection (OOD) and output-short detection (OSD)
Input signal voltage level: 3.3-V and 5-V CMOS interfaces (Schmitt trigger input)
Maximum output voltage: 25V
Serial data transfer rate: 25 MHz (max) @cascade connection
Operating temperature range: T
opr
= −40
to 85°C
Package: SSOP-P-225-0.65B
Constant-current accuracy
Output Voltage
0.4 V to 4 V
Current accuracy
Between Channels
±3%
Current Accuracy
Between ICs
±6%
Output Current
15 mA
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(Ver.0.0) 08-02-07
MARKTECH [ MARKTECH CORPORATE ]
