16-channel LED Constant

Current Drive TM3100

Characterization

TM3100 is a driver IC designed for LED display panel. It features built-in CMOS shift register and
latch that can convert serial input data into parallel output data. TM3100 has 16 current sources that
can provide 5 ~ 35mA constant current at each output port to drive LEDs. Each OUT driver channel
output, if shorted circuited, will output greater current, and environment changes hardly affect its
output current. Besides, users may use external resistors of different resistance values (REXT) to
adjust the current at each output of TM3100, therefore, they can accurately control LED brightness,
because of which, the device is applicable to display driver module of high-quality white balance. This
product is excellent and reliable quality.

Features

 16 constant-current source output channels

 Withstanding voltage 30.0V at OUT port
 The current output does not vary with load valtage at output
 Range of constant current: 5 ~ 35mA @ VDD = 5V
 Extremely accurate current output
Maximum error (channel to channel) : ≤ ± 2.5%
Maximum error (chip and chip) : ≤ ± 2.5%
 Set precise current output by adjusting external resistors
 Clock frequency Up to 25MHz
 Operating voltage: 4.5V ~ 5.5V
 Applicable to indoor, outdoor, single, double, full-color (dynamic and static) LED display,
lighting, and energy efficient lighting.
 Package type: SSOP24, QSOP24

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 16-channel LED Constant
Current Drive TM3100
Diagram of internal structure

VDD
VDD

SDI LSB MSB

16-bit shift register

CLK SDO
module
0 15
● ● ●

LSB MSB
LE Output ON/OFF data latch

module ● ● ●

Constant-current-sourc
OE e current output module
● ● ●

R-EXT Current

regulation

Constant current
GND
GND
source control

circuit
● ● ●

OUT0 OUT1 OUT14 OUT15

.

Figure 1

Pin Information

GND 1 24 VDD
SDI 2 23 R-EXT
CLK 3 22 SDO
LE 4 21 OE
OUT0 5 20 OUT15
OUT1 6 Top View 19 OUT14
OUT2 7 18 OUT13
OUT3 8 17 OUT12
OUT4 9 16 OUT11
OUT5 10 15 OUT10
OUT6 11 14 OUT9
OUT7 12 13 OUT8

Figure 2

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 16-channel LED Constant
Current Drive TM3100
Pin Function

Pin Name Pin No. I/O Function Description

SDI 2 I Serial data input, featuring Schmitt input buffer

Serial-data shift-clock input, featuring Schmitt input buffer. Shift data at rising
CLK 3 I
edge of the clock
Data latch control port,featuring Schmidt buffered input. When LE is high, serial
LE 4 I
data is transmitted to the input latch;when LE is low, the data is latched.
Output enable control port. Wheen OE is low, OUT0 ~ OUT15 are enabled.
OE 21 I Output; when OE is high, OUT0 ~ OUT15 are disabled. This pin has a built-in
pull-up resistor to VDD.
This is where users set constant current of OUT0 ~ OUT15. An external resistor
R-EXT 23 I/O
may be connected bwteeen GND and it.
This port outputs serial data at rising edge of the CLK. It may be connected to the
SDO 22 O
SDI port of next chip.
Constant current source output. Each output can be shorted to improve constant
OUT0 5 O
current.
OUT1 6 O Constant current source output
OUT2 7 O Constant current source output
OUT3 8 O Constant current source output
OUT4 9 O Constant current source output
OUT5 10 O Constant current source output
OUT6 11 O Constant current source output
OUT7 12 O Constant current source output
OUT8 13 O Constant current source output
OUT9 14 O Constant current source output
OUT10 15 O Constant current source output
OUT11 16 O Constant current source output
OUT12 17 O Constant current source output
OUT13 18 O Constant current source output
OUT14 19 O Constant current source output
OUT15 20 O Constant current source output
VDD 24 - Chip power
GND 1 - This pin provides ground cconnection for control logic and drive current circuit.

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 16-channel LED Constant
Current Drive TM3100
Output and input equivalent circuit

VDD VDD VDD VDD

CLK SDO
LE OE
SDI OUTn

GND GND GND GND

Figure 3
Since a considerable amount of static electricity is likely to be generated in a dry season or a dry
environment and electrostatic discharge will damage integrated circuits, it is the advice of Titan that
preventive measures should be taken for all appropriate ICs are. Improper operation and welding may cause
ESD damage or performance degradation, and put the chip out of service.

Range of absolute maximum ratings (1) (2)

Parameter Name Parameter Symbol Limit Unit

Voltage drain drain Vdd -0.4～6.0 V
Input voltage range Vin -0.4～VDD+0.4V V
Output current (DC) Iout 5～35 mA
Output voltage range Vout -0.4～+6.0 V
Clock frequency Fclk 25 MHZ
Operating temperature -40～+85 ℃
Topr
range
Storage temperature -55～+150 ℃
Tstg
range
ESD Sensitivity HBM 3000 V
(1) The ratings contained in the table above do not indicate the chip may operate wiith limit parameters over time,
otherwise, it might give permanent damage to the chip and reduce device reliability. Titan Micro Electronics does not
recommend the chip to operate exceed these parameter limits under any other conditions.
(2) All voltage values are taken relative to network ground test.

Recommended operating conditions

Tested at -45 ℃ ~ + 85 ℃ , unless otherwise stated TM3100

Parameter Parameter Maximu Unit
Test Conditions Minimum Typical
Name Symbol m
Voltage drain
VDD 4.5 5.0 5.5 V
drain
Range of
VO OUT0~OUT15 30 V
withstanding

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 16-channel LED Constant
voltage at output Current Drive TM3100
High-level input
VIH 0.7×VDD 5.0 VDD+0.7 V
voltage
Low-level input
VIL GND-0.7 0 0.3×VDD V
voltage
High-level output
IOH VDD=5V,SDO=4.5V -8 mA
current
Low-level output
IOL VDD=5V,SDO=0.5V 16 mA
current
Constant output OUT0~OUT15
IOLC 5 35 mA
sink current 4.5V≤VDD≤5.5V
Operating
temperature TA -40 +85 ℃
range
Operating
junction
TJ -40 +125 ℃
temperature
range
Data shift clock
FCLK CLK 25 MHZ
frequency
TWH0 CLK 15 ns
TWH0 CLK 15 ns
Pulse duration TWH1 LE 25 ns
TWH2 OE 60 ns
TWL2 OE 30 ns
TSU0 SDI – CLK↑ 5 ns
Setup time
TSU1 LE↓– CLK↑ 12 ns
TH0 SDI – CLK↑ 5 ns
Time holding
TH1 LE↓– CLK↑ 12 ns

Electrical Characteristics

At the test conditions of VDD = 5V and TA = + 25 ℃ TM3100

Parameter Parameter Maximu Unit
Test Conditions Minimum Typical
Name Symbol m
High-level output
VOH IOH=-6mA：SDO VDD-0.4 VDD V
voltage
Low-level output
VOL IOL=10mA：SDO 0.4 V
voltage
VIN = connected to VDD
Input current IIN 0.5 1.0 2 mA
or GND SDI, CLK, LE, OE
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 16-channel LED Constant
SDI/CLK/LE=0,OE=1,Current Drive TM3100
ICC0 9 mA
Riref=open
SDI/CLK/LE=0,OE=1,
ICC1 10 mA
Riref=1.2K
Supply Current
OUT0~OUT15=ON,SDI,C
(IDD) ICC2 12 mA
LK,LE,OE=0, Riref =600Ω
OUT0~OUT15==ON,SDI,
ICC3 CLK,LE,OE=0, Riref 10 mA
=1.2K
OUT0~OUT15==ON,VOU
Constant output Tn=
IOLC 29.25 30 30.75 mA
current 1V=VOUTfix=1V,Riref=60
0Ω,VDD=5V，TA=25℃
OUTn=OFF,VOUTn=VOU
Output leakage
IOLKG Tfix=5.5V,OE=1,Riref=1.5 0.1 uA
current
K,
Constant current OUT0~OUT15=ON,VOUT
error n
ΔIOLC0 ±2.0 ±2.5 %
(Channel to =1V=VOUTfix=1V,Riref=4
channel) 70Ω
OUT0~OUT15=ON,VOUT
Constant current
n=
error ΔIOLC1 ±2.0 ±2.5 %
1V=VOUTfix=1V,Riref=1.5
(chip to chip)
K,VDD=5V，TA=25℃
OUT0~OUT15=ON,VOUT
Linear n=
ΔIOLC2 ±0.5 ±1 %/V
adjustment 1V=VOUTfix=1V,Riref=47
0Ω,VDD=5 V
OUT0~OUT15=ON,VOUT
n=
Load regulation ΔIOLC3 ±1 ±3 %/V
1V~3V,VOUTfix=1V,Riref=
470Ω
Reference
VIREF Riref=470Ω,TA=25℃ 1.16 1.20 1.24 V
voltage output
Pull-up resistor RPUP OE 32 40 48 kΩ
Pull-down
RPDWN LE 32 40 48 kΩ
resistor

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 16-channel LED Constant
Switching characteristics Current Drive TM3100

At the test conditions of VDD = 5V and TA = + 25 ℃ TM3100

Paramete Parameter Maximu Unit
Test Conditions Minimum Typical
r Symbol Name m
TR0 SDO 50 100 nS
Rise Time
TR1 OUTn 80 160 nS
TF0 SDO 50 100 nS
Fall Time
TF1 OUTn 80 160 nS
TD0 CLK ↑ to SDO ↑ ↓ 60 120 nS
LE↑ or OE ↑ ↓ to
TD1 100 150 nS
OUT0/OUT7/OUT8/OUT15 On/Off
LE ↑ or OE ↑ ↓ to
Transmissio TD2 120 170 nS
OUT1/OUT6/OUT9/OUT14 On/Off
n delay time
LE ↑ or OE ↑ ↓ to
TD3 140 190 nS
OUT2/OUT5/OUT10/OUT13 On/Off
LE ↑ or OE ↑ ↓ to
TD4 160 210 nS
OUT3/OUT4/OUT11/OUT12 On/Off
Output Error
TON_ERR -50 50 nS
Time

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 16-channel LED Constant
Current Drive TM3100
Timing chart

TWH0,TWL0,TWH1,TWH2,TWL2:
VCC

INPUT (1)
50%

GND
TWH TWH

TSU0,TSU1,TH0,TH1:
VCC
CLOCK
INPUT (1)
50%

GND
TSU TH

VCC
DATA/CONTROL
INPUT 50%(1)

tR0,tR1,tF0,tF1,tD0,tD1,tD2,tD3,tD4:
VCC

INPUT (1)
50%

GND
tD

VOH or VOUTn
90%
OUTPUT 50%
10%
VOL or VOUTn
tR or tF
Figure 4

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 16-channel LED Constant
Current Drive TM3100
Logic Diagram

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
CLK
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
SDI

LE

OE

OUT0 OFF
ON
OUT1 OFF
ON
OUT2 OFF
ON
OUT3 OFF
ON

● ● ●
● ● ●
● ● ●

OUT15 OFF
ON

SDO Don't Csre

Figure 5

CLK LE OE SDI OUT0…OUT7…OUT15 SDO

↑ H L Dn Dn…Dn – 7…Dn – 15 Dn – 15

↑ L L Dn + 1 No change Dn – 14

↑ H L Dn + 2 Dn + 2…Dn – 5…Dn – 13 Dn – 13

↓ — L Dn + 3 Dn + 2…Dn – 5…Dn – 13 Dn – 13

↓ — H Dn + 3 Off Dn – 13

Application Information

As shown below, the output current (IOUT) may be adjusted with an external resistor (Rext). The
following formula will help calculate the output current value:
1.20V
I out   15
Riref

Figure 6
wherein Riref refers to the resistance of R-EXT. When the resistance value is 600Ω, it can be
calculated by the formula that the output current value is 30mA; when the resistance value is 1KΩ,
the output current is 18mA.
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 16-channel LED Constant
Current Drive TM3100

Figure 7
Different resistance between R-EXT and GND will give different constant current at the OUT
pin, but the voltage at the turning point of constant current varies with constant current. As shown
by the figure, constant current voltage point ≈0.8V when the constant current is 30mA, and it drops
to ≈0.5V when the constant current is 15mA. The voltage drop at OUTx should be taken into full
consideration in the design of the circuit for fear the drive current is below the pre-set value.
In addition, when they are on, it is not appropriate for the OUTx pins work with a high voltage
drop for a long time, because this would increase power dissipation produce a lot of heat on the
chip, and affect system performance and stability.
In practical application, electromagnetic interference may result from signal traces or other
factors. To avoid such faults, it is recommended that TM3100 module should be placed as close as
possible to the LED display module.

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 16-channel LED Constant
Schematic diagram of packaging:SSOP24 Current Drive TM3100

A2

C
A

θ
L

A1
D
b
e

E1
E

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 1.75 2.10 0.068 0.082
A1 0.05 0.20 0.001 0.007
A2 1.70 1.90 0.066 0.074
b 0.4TYP 0.015TYP
0c 0.09 0.2 0.003 0.007
D 12.9 13.1 0.507 0.515
E 5.9 6.1 0.232 0.240
E1 7.6 8.2 0.299 0.322
e 1.00TYP 0.039TYP
L 0.33 0.73 0.012 0.028
θ 0° 8° 0° 8°

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 16-channel LED Constant
Schematic diagram of packaging:SSOP24 Current Drive TM3100

A2
A

C
θ
L

A1
D
b e

E1
E

Dimensions In Millimeters Dimensions In Inches

Symbol
Min Max Min Max
A 1.50 1.80 0.059 0.070
A1 0.102 0.249 0.004 0.009
A2 1.40 1.55 0.055 0.061
b 0.2 0.3 0.007 0.011
c 0.2TYP 0.007TYP
D 8.585 8.738 0.337 0.344
E 3.86 3.998 0.151 0.157
E1 5.842 6.198 0.23 0.244
e 0.635TYP 0.025TYP
L 0.406 0.889 0.015 0.035
θ 4°TYP 4°TYP

All specs and applications shown above are subject to change without prior notice.

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