L16B06 [UTC]
16-BIT CONSTANT CURRENT LED DRIVER;
| 型号： | L16B06 |
| 厂家： | 
Unisonic Technologies |
| 描述： | 16-BIT CONSTANT CURRENT LED DRIVER 驱动 |
| 文件： | 总13页 (文件大小：339K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L16B06
CMOS IC
16-BIT CONSTANT CURRENT
LED DRIVER
DESCRIPTION
The L16B06 is a constant-current sink driver specifically
designed for LED display applications. The device incorporates shift
registers, data latches, and constant current circuitry on the silicon
CMOS chip. The maximum output current value of all 16 channels is
adjustable by a single external resistor.
SSOP-24 (209mil)
FEATURES
*Constant-current outputs: 3mA to 60mA adjustable by one external
resistor
*Maximum output voltage: 17V
*Maximum clock frequency: 25MHz
*Power supply voltage: 3.3V to 5V
*In-rush current control
*Bit-to-bit skew: ±3% Chip-to-chip skew: ±6%
*Package and pin assignment compatible to conventional LED
drivers
APPLICATIONS
*Indoor/Outdoor LED Video Display
*LED Variable Message Signs (VMS) System
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
L16B06L-R24-T
L16B06L-R24-R
L16B06G-R24-T
L16B06G-R24-R
SSOP-24
SSOP-24
Tube
Tape Reel
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Copyright © 2013 Unisonic Technologies Co., Ltd
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L16B06
CMOS IC
PIN CONNECTION
PIN DESCRIPTION
PIN No.
PIN NAME
GND
FUNCTION
1
2
Ground terminal.
DAI
Serial data input terminal.
Synchronous clock input terminal for serial data transfer. Data is sampled at the rising
edge of DCK.
3
DCK
Input terminal of data strobe. Data on shift register goes through at the high level of LAT
(level trigger). Otherwise, data is latched.
Sink constant-current outputs (open-drain).
Output enable terminal:
4
LAT
5-20
OUT0-15
21
‘H’ for all outputs are turned off,
EN
‘L’ for all outputs are active.
22
23
24
DAO
REXT
VDD
Serial data output terminal.
External resistors connected between REXT and GND for output current value setting.
Supply voltage terminal.
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L16B06
CMOS IC
BLOCK DIAGRAM
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L16B06
CMOS IC
EQUIVALENT CIRCUIT OF INPUTS AND OUTPUTS
1. DCK, DAI, LAT, EN TERMINALS
2. DAO TERMINALS
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L16B06
MAXIMUM RATINGS (TA=25C, TJ=150C)
CHARACTERISTIC
Supply Voltage
CMOS IC
SYMBOL
VDD
RATING
-0.3 ~ 7.0
-0.3 ~ VDD+0.3
70
UNIT
V
Input Voltage
VIN
V
Output Current
IOUT
mA
V
Output Voltage
VOUT
FDCK
TOPR
TSTG
-0.3 ~ 17
25
Input Clock Frequency
Operating Temperature
Storage Temperature
MHz
C
C
-40 ~ 85
-55 ~ 150
RECOMMENDED OPERATING CONDITION
CHARACTERISTIC
Supply Voltage
SYMBOL
VDD
CONDITION
MIN
3.3
TYP
5.0
MAX
UNIT
V
5.5
0.5×VDD
Output Voltage
Output Voltage
Output Current
VOUT
VOUT
IO
Driver On
1.0
V
Driver Off
OUTn
17
60
V
5
mA
0.8×VDD
VIH
VDD
0.2×VDD
Input Voltage
VDD=3.3V ~ 5.5V
V
VIL
0.0
ELECTRICAL CHARACTERISTICS (VDD=5.0 V, TA=25C, unless otherwise specified)
CHARACTERISTIC
SYMBOL
VIH
CONDITION
CMOS logic level
CMOS logics2 level
VOH=17V
MIN
0.8×VDD
GND
TYP
MAX
VDD
UNIT
V
Input Voltage “H” Level
Input Voltage “L” Level
Output Leakage Current
VIL
0.2×VDD
±1
V
IOL
µA
V
VOL
IOL=1.5mA
0.2
Output Voltage (DAO)
VOH
IOH=1.4mA
VDD-0.2
V
Output Current Skew
(Channel-to-Channel)
Output Current Skew
(Chip-to-Chip)
IOL1
IOL2
±3
±6
%
%
VOUT=1.0V,
RREXT=2.2KΩ
R
REXT =2.2KΩ,
Output Voltage Regulation
Supply Voltage Regulation
% / VOUT
% / VDD
±0.1
±1
±0.5
±4
VOUT=1V ~ 3V
%/V
RREXT =2.2KΩ
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L16B06
CMOS IC
ELECTRICAL CHARACTERISTICS(Cont.)
CHARACTERISTIC
SYMBOL
CONDITION
power on all pins are
open unless VDD and
GND
MIN
TYP
3
MAX
UNIT
mA
IDD(OFF)
4
6
input signal is static
Rrext=2.9KΩall
outputs turn off
IDD(OFF)
IDD(ON)
IDD(OFF)
IDD(ON)
5
5
9
9
mA
mA
mA
mA
input signal is static
Rrext=2.9KΩall
outputs turn on
Supply Current
6
input signal is static
Rrext=1.05KΩall
outputs turn off
10
10
input signal is static
Rrext=1.05KΩall
outputs turn on
SWITCHING CHARACTERISTICS (VDD=5.0V, TA=25C, unless otherwise specified)
CHARACTERISTIC
SYMBOL
CONDITION
MIN
TYP
52
MAX
UNIT
ns
EN-to-OUT0
LAT-to-OUT0
DCK-to-DAO
EN-to-OUT0
LAT-to-OUT0
DCK-to-DAO
Propagation Delay
(‘L’ to ‘H’)
tPLH
49
ns
20
ns
22
ns
Propagation Delay
(‘H’ to ‘L’)
tPHL
75
ns
VIH=VDD, VIL=GND
REXT=2.2kΩ,
19.5
ns
R
VL=5.0V, CL=13pF
tOR
tOF
33.5
6
ns
ns
Output Current Rise Time
Output Current Fall Time
Output Delay Time
tOD
5
ns
(OUT(n)-to-OUT(n+1))
SWITCHING CHARACTERISTICS (VDD=3.3V, TA=25C, unless otherwise specified)
CHARACTERISTIC
SYMBOL
CONDITION
MIN.
TYP.
51
MAX.
UNIT
ns
EN-to-OUT0
LAT-to-OUT0
DCK-to-DAO
EN-to-OUT0
LAT-to-OUT0
DCK-to-DAO
Propagation Delay
(‘L’ to ‘H’)
tPLH
21.5
12
ns
ns
23
ns
Propagation Delay
(‘H’ to ‘L’)
VIH=VDD, VIL=GND
REXT =2.2KΩ
VL=5.0V, CL=13pF
tPHL
49
ns
R
11.5
35
ns
Output Current Rise Time
Output Current Fall Time
Output Delay Time
tOR
tOF
ns
10
ns
tOD
10
ns
(OUT(n)-to-OUT(n+1))
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L16B06
CMOS IC
SWITCHING CHARACTERISTICS(Cont.)
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L16B06
CMOS IC
TIMING DIAGRAM
1. DCK-DAI, DAO
tWDCK
tWDCK
50
%
50
%
50
%
50
%
DCK
DAI
tSEPUP(D) tHOLD(D)
50
%
50
%
50
%
50
%
DAO
tPLH
tPHL
2. DCK-LAT
3. LAT-OUT0
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L16B06
CMOS IC
TIMING DIAGRAM(Cont.)
4. EN -OUT0
5. OUTn+1-OUTn
CONSTANT-CURRENT OUTPUT
Constant-current value of each output channel is set by an external resistor connected between the REXT pin
an GND. Varying the resistor value can adjust the current scale ranging from 3mA to 60mA. The reference voltage of
REXT terminal (Vrext) is approximately 1.2V. The output current value is calculated roughly by the following
equation:
V
REXT(V)
I
OUT(mA)
M
RREXT(KΩ)
Iout(mA)
M
3
5
10
50
20
46.6
30
45
40
50
55
54.1
43.3
41.6s
In order to obtain a good performance of constant-current output, a suitable output voltage is necessary.
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L16B06
CMOS IC
SERIAL DATA INTERFACE
The serial-in data (DAI) will be clocked into 16 bit shift register synchronized on the rising edge of the clock
(DCK). The data ‘1’ represents the corresponding current output ‘ON’, while the data ‘0’ stands for ‘OFF’. The data
will be transferred into the 16 bit latch register when the strobe signal (LAT) is ‘H’ (level trigger); otherwise, the data
will be held. The trigger timing of the serial-out data (DAO) will be shifted out on synchronization to the rising edge of
the clock. All outputs are turned off while enable terminal (EN) is kept at high level. And they are active when EN
shifts to low.
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L16B06
CMOS IC
OUTPUTS DELAY
Large in-rush currents will occur when the system activates all the outputs at once. To reduce this effect, L16B06
is designed to have a constant unit of delay (around 5ns) between outputs. The delay sequence for every output
goes like this: OUT0 (no delay) → OUT15 → OUT1 → OUT14 → OUT2 → OUT13 → OUT3 → OUT12 → OUT4 →
OUT11 → OUT5 → OUT10 → OUT6 → OUT9 → OUT7 → OUT8 (the largest delay).
GLOBAL BRIGHTNESS CONTROL
L16B06 has no built-in global brightness control feature. In order to obtain a lower resolution of global brightness
control effect, two methods could be utilized. One is providing PWM signal synchronized on latch pulse to modulate
the output enable terminal (EN pin). The other is to adjust the RREXT value or voltage drop across the external
resistor. Please see the reference circuit below:
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L16B06
CMOS IC
POWER DISSIPATION
The power dissipation of a semiconductor chip is limited to its package and ambient temperature, in which the
device requires the maximum output current calculated for given operating conditions. The maximum allowable
power consumption can be calculated by the following equation:
TJ (Junction temperature)(max)(°C) – TA(Ambient Temperature)
PD(max)(watt)=
R
TH (Junction - to – air thermal resistance)(°C/watt)
The power consumption of IC can be determined by the following equation an should be less than the maximum
allowable power dissipation:
PD(W) = VCC(V) × IDD(A) + VOUT 0 × IOUT 0 × DUTY 0 + ….. + VOUT 15 × IOUT 15 × DUTY 15 ≤ PD (max)(W)
TYPICAL APPLICATION
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L16B06
CMOS IC
TYPICAL APPLICATION(Cont.)
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
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