TLC59116 Datasheet, PDF (18/30 Pages) Texas Instruments – 16-CHANNEL Fm+ I2C-BUS CONSTANT-CURRENT LED SINK DRIVER

TLC59116
SLDS157B – FEBRUARY 2008 – REVISED JULY 2008 .................................................................................................................................................... www.ti.com
1.00
CM = 0 (Low Current Multiplier)
0.75
CM = 1 (High Current Multiplier)
HC = 0 (Low
HC = 1 (High
HC = 0 (Low
0.50 ^{Voltage SubBand) Voltage SubBand) Voltage SubBand)}
HC = 1 (High
Voltage SubBand)
0.25
0.00
Configuration Code (CM, HC, CC[0:5]) in Binary Format
Figure 9. Current Gain vs Configuration Code
Error Flags Registers (EFLAG1, EFLAG2)
Table 12 describes Error Flags Registers 1 and 2.
Table 12. EFLAG1, EFLAG2 – Error Flags Registers (Address 1Dh and 1Eh) Bit Description
ADDRESS REGISTER
BIT
SYMBOL ACCESS⁽¹⁾ VALUE⁽²⁾
DESCRIPTION ⁽³⁾
1Dh
EFLAG1
7:0
EFLAG1[7:0]
R
1111 1111
Error flags 1. Upper 8-bit channel error
status.
1Eh
EFLAG2
7:0
EFLAG2[7:0]
R
1111 1111
Error flags 2. Lower 8-bit channel error
status.
(1) R = read, W = write
(2) Default value
(3) At power up, in order to initialize the Error Flags registers, the host must write 1 to bit 7 of the MODE2 register and then write 0 to bit 7
of the MODE2 register.
Open-Circuit Detection
The TLC59116 LED open-circuit detection compares the effective current level I_OUT with the open load detection
threshold current I_OUT,Th. If I_OUT is below the threshold I_OUT,Th the TLC59116 detects an open load condition. This
error status can be read out as an error flag through the registers EFLAG1 and EFLAG2.
For open-circuit error detection, a channel must be on.
Table 13. Open-Circuit Detection
STATE OF OUTPUT PORT
Off
On
CONDITION OF OUTPUT
CURRENT
I_OUT = 0 mA
I_OUT < I_OUT,Th ⁽¹⁾
I_OUT ≥ I_OUT,Th ⁽¹⁾
ERROR STATUS CODE
0
0
Channel n error status bit 1
(1) I_OUT,Th = 0.5 × I_OUT,target (typical)
MEANING
Detection not possible
Open circuit
Normal
18
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