LSD9016 16ch Constant Current LED Driver
1. Features
16 channels constant current output.
Constant output current is to set up external resister.
I out = 5mA ~ 90mA
Constant current output voltage : Vo = 17V(Max)
Excellent output current accuracy :
between outputs : +/- 1%(typ)
between devices : +/- 3%(typ)
Control data method : serial-in, parallel out.
Data transfer frequency : fmax = 25Mhz
Operating voltage range : Vdd = 4.5~5.5V
Operating temperature range : Top = -40 ~85℃
20ns delay of output to lower bouncing noise.
Schmitt trigger input.
Pb free Package : LSD9016-X24T
SSOP24-150 - 0.64
LSD9016-X24S SOP24L- 300 - 1.0
LSD9016-X24W SOP24 - 375- 1.27
2. Description
The LSD9016 is a constant current LED driver for lighting application.
It has sixteen regulated current ports to provide uniform and constant current sink for
driving LEDs within a large range of Vf variations.
A user may adjust the output current from 5mA to 90mA through an external resister
and can control LED brightness via OEB input, too.
Th d
The
duty
t cycle
l off OEB can decide
d id the
th brightness
b i ht
intensity
i t
it from
f
0% tto 100%
100%.
3. Application
Automotive interior LED lighting driver.
Decoration lighting.
Traffic sign
Video wall
A signboard
i b d
Advanced Material on Silicon1 2010
TEL; 82-70-8832-9685 FAX;822-2051-9685
140-3 Samsung-dong Gangnam-gu Seoul Korea.
LSD9016 16ch Constant Current LED Driver
4. Pin Description
PIN
NO
PAD NAME
1
GND
2
4
CLOCK
STROBE
GND terminal for logic and current sink.
Serial data input terminal for Internal shift register.
Clock input terminal for internal shift register.
Serial data is captured at rising edge of this input.
Data strobe terminal for internal data latch.
GND
1
24
VDD
DIN
2
23
R-EXT
CLOCK
3
22
DOUT
STROBE
4
21
OEB
OUT0
5
20
QUT15
OUT1
6
19
OUT14
OUT2
7
18
OUT13
OUT3
8
17
OUT12
OUT4
9
16
OUT11
LS
SD9016
3
DIN
DESCRIPTION
24
VDD
Power supply terminal( 4.5V ~ 5.5V)
5~20
OUTn
Output terminal for External LED.
OUT5
10
15
OUT10
OUT6
11
14
OUT9
OUT7
12
13
OUT8
21
OEB
Output enable input terminal.
OUTn pin outputs when this input at “L” level
22
DOUT
Serial data output terminal for external device.
device
R-EXT
Input terminal for external RESISTER
The resister which connects between R-EXT and
GND
sets a output current on OUTn terminal.
23
Top View
SSOP24-150-0.64
SOP24L -300-1.0
SOP24 - 375-1.27
5. Equivalent Circuit of input and output
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
6. Block Diagram
**
** 20ns delay
This is designed for high speed switching between outputs and is intended to have the effect of
reducing switching noise when all outputs are ON or OFF at the same time.
There is a switching time delay (20 ns typ.) between adjacent outputs.
< Truth Table >
CLOCK
STROBE
OEB
DIN
OUT0~15
DOUT
↑
H
L
Dn
Dn Dn-1 ------ Dn-14 Dn-15
Dn-15
↑
L
L
Dn+1
No Change
Dn-14
↑
H
L
Dn+2
Dn+2 Dn+1 …….. Dn-12 Dn-13
Dn-13
↓
X
L
Dn+3
Dn+2 Dn+1 …….. Dn-12 Dn-13
Dn-13
↓
X
H
Dn+3
All output s are off
Dn-13
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
7. Timing Diagram
0
1
2
13
14
15
CLOCK
DIN
STROBE
Output hold
OEB
OFF
OUT0
ON
OFF
OUT1
ON
.
.
.
.
OUT2
OFF
ON
OFF
OUT15
DOUT
ON
Previous Data
STROBE are level sensitive ( not edge triggered).
triggered)
STROBE = “H” level, become transparent STROBE =“L” level hold data
OEB = “H” level , all ouput are off. DOUT is to change on the rising edge of clock..
8. Electrical Characteristics
8-1. Absolute Maximum Ratings( Ta = 25℃ )
PARAMETER
SYMBOL
RATING
UNIT
Supply Voltage
VDD
0~6
V
Output Voltage
VOUT
-0.3 ~ 17
V
Input Voltage
VIN
-0.4 ~ Vdd + 0.4
V
Output Current
Iout
90
mA
Clock Frequency
FCK
25
MHz
GND Terminal Current
IGND
1440
mA
PD
1.56(X24W)/1.31(X24S ) / 1.136(X24T )
W
Power Dissipation
( 2 Layer PCB, Ta = 25℃)
LSD9016-X24W = 80
Thermal resistance
( 2 Layer PCB,
PCB Ta = 25℃ )
RTH
LSD9016-X24S = 95
℃ /W
LSD9016-X24T = 110
Operating Temperature
TOP
-40 ~ 85
℃
Storage Temperature
TST
-55 ~ 150
℃
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
8-2. Recommended Operating Ratings( Ta = 25℃ )
PARAMETER
SYMBOL
Condition
MIN
MAX
UNIT
VDD
-
3.5
5.5
V
Output Voltage when LED off
VOUT(OFF)
-
-
-
17
V
Output Voltage when LED on
VOUT(ON)
-
0.7
-
4
V
High level logic Input Voltage
VIH
-
2.0
Vdd
V
Low level logic Input Voltage
VIL
-
GND
0.8
V
High level DOUT output current
IOH
-
-1
mA
Low level DOUT output current
IOL
-
1
mA
Output Current LSD9016-X24S
Iout
-
5
90
mA
Output Current LSD9016-X24T
Iout
-
5
50
mA
Operating Temperature
TOP
-
-40 ~ 85
℃
Storage Temperature
TST
-
-55 ~ 150
℃
STROBE Pulse Width
twSTROBE
50
-
-
ns
twCLOCK
20
-
-
ns
twOEB
100
-
-
ns
5
-
-
ns
Supply Voltage
CLOCK Pulse Width
OEB Pulse Width
Vdd = 4.5~5.5V
4 5 5 5V
TYP
DIN S
Setup
t Time
Ti
t DIN
tsDIN
DIN Hold Time
thDIN
10
-
-
ns
STROBE Setup Time
tsSTROBE
50
-
-
ns
STROBE Hold Time
thSTROBE
50
-
-
ns
CLOCK Frequency
FCK
-
-
25
MHz
Cascade
Operation
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
8-3. DC Characteristics
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNIT
High level logic output voltage
VOH
DOUT
IOH = -1mA
VDD -
-
-
V
Low level logic output voltage
VOL
DOUT
IOL = 1mA
-
-
0.4
V
High level logic input current
IIH
OEB, DIN, CLOCK
VIN = VDD
-
-
1
µA
Low level logic input current
IIL
STROBE, DIN, CLOCK
VIN = GND
-
-
-1
µA
-
0.1
0.5
mA
0.4
IDD1
Vout = 16V, No REXT,
IDD2
REXT = 1.56kΩ, All output off.
-
-
7.0
mA
IDD3
REXT = 500Ω, All output off.
-
-
14.0
mA
IDD4
REXT = 1.56kΩ, All output on.
-
-
7.0
mA
IDD5
REXT = 500Ω, All output on.
-
-
14.0
mA
IO1
VDD = 5.0V, Vout = 1.5V,
REXT = 1.56kΩ
11.28
12.0
12.72
mA
IO2
VDD = 5.0V, Vout = 1.5V,
REXT = 500Ω
34.78
37.0
39.22
mA
Output off leak current
IOK
Vout = 1.0V, REXT = 1.56kΩ,
All output off.
-
-
0.5
µA
Constant current error
ΔIO
OUT0 to OUT15
VDD = 5.0V, Vout = 1.5V,
REXT = 1.56kΩ
-
±1
±3
%
%VDD
OUT0 to OUT15
VDD = 4.5~5.5V, Vout = 1.5V,
REXT = 1.56kΩ
-
±1
±4
%/V
%Vout
OUT0 to OUT15
VDD = 5.0V, Vout = 1.0~3.0V,
REXT = 1.56kΩ
±1
±4
%/V
Power supply current
Constant current output
Constant current power supply
voltage regulation
Constant current output
voltage regulation
Pull-up resistor
Pull-down resistor
RUP
RDOWN
CLOCK = Low, OEB = High
OEB
250
500
800
kΩ
STROBE
250
500
800
kΩ
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
8-4. AC Characteristics ( Unless otherwise specified, Ta = 25 ℃ VDD = 5V )
PARAMETER
Propagation
Delay time
SYMBOL
CONDITIONS
MIN
TYP
MAX
CLOCK-OUT0
tpLH1
STROBE = “H”, OEB = “L”
-
25
100
STROBE-OUT0
tpLH2
OEB = “L”
-
25
100
OEB – OUT0
tpLH3
STROBE = “H”
-
25
100
CLOCK - DOUT
tpLH
20
-
-
UNIT
ns
CLOCK -OUT0
tpHL1
STROBE = “H”, OEB = “L”
-
50
100
STROBE-OUT0
tpHL2
OEB = “L”
-
50
100
OEB – OUT0
tpHL3
STROBE = “H”
-
50
100
CLOCK –DOUT
tpHL
20
-
-
Output rise time
tor
10 to 90% of voltage wave form
-
30
150
ns
Output fall time
tof
90 to 10% of voltage wave form
-
70
150
ns
Output delay time
tDLY(on)
OUTn – OUT(n+1)
Between adjacent outputs
-
20
-
ns
Output delay time
tDLY(off)
OUTn – OUT(n+1)
Between adjacent outputs
-
20
-
ns
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
9. Application Information
< Constent Current >
To keep supply constant current, LSD9016 provides minimum variation in current from channel
to channel and chip to chip. The maximum current skew in each channel is less than 3% and
less than 6% between ICs
where, Ta = 25℃ Vout = 1.5V Vdd = 5V Rext = 1.56k
Constant current ouput vs Rext
100
90
80
Iout [mA]
70
60
50
40
30
20
10
150
300
460
620
780
930
1100
1250
1400
1560
Rext [Ohm]
Conditions : Vout=1.5V , Vdd=5.0V, Ta=25’C
This data is provided for reference only.
< Adjusting Output Current >
All output CURRENT of LSD9016(Iout) are setting by one external resistor at pin R-EXT.
The relative curve between Iout and resistance R-EXT is shown as the above figure and under
table Iout vs R_EXT.
Also, the output current can be calculated from as below equation approximately.
Iout ≈ Vref / REXT * 14.8 ((IOUT < 60mA)) where , Vref = 1.22V
Iout ≈ Vref / REXT * 13.2 (IOUT ≥ 60mA)
where Rext in Ω is resistance of the external resister connected to R-EXT terminal.
< Table “Iout vs R_EXT” >
I out ( mA )
R_EXT( Ω )
I out ( mA )
R_EXT( Ω )
20
900
60
300
30
600
70
240
40
450
80
200
50
360
90
180
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
< Package Power Dissipation(Pd) >
The maximum allowable package power dissipation is determined as Pd(max) = (Tj-Ta)/Rth
When 16 output channels are turn on simultaneously, the operating package power dissipation
is Pd(op) = (Idd x Vdd) + (I out x duty x Vout x 16) therefore, to keep Pd(op) ≤ Pd(max) nomally
the allowable maximum output current “I out” is determinated
Iout = { [ (Tj- Ta)/Rth] – ( Idd x Vdd) } / Vout / duty / 16,
Where, the Tj of LSD9016 is 150 ℃
(A1) Iout = 90mA Vout = 1.0V 16 channel outputs
For SOP24L type package, the thermal resistance is Rth = 95(℃/W)
100
80
60
40
20
80%
85%
90%
95%
100%
85%
90%
95%
100%
75%
70%
65%
60%
55%
Ta = 55℃
80%
Ta = 25℃
50%
45%
40%
35%
30%
25%
20%
15%
10%
5%
0
Ta = 85℃
(A2) Iout = 90mA Vout = 1
1.0V
0V 16 channel outputs
For SSOP24 type package, the thermal resistance is Rth = 110(℃/W)
100
80
60
40
20
Ta = 25℃
Ta = 55℃
75%
70%
65%
60%
55%
50%
45%
40%
35%
30%
25%
20%
15%
10%
5%
0
Ta = 85℃
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
(A2) Iout =50mA Vout = 1.0V 16 channel outputs
For SSOP24 type package, the thermal resistance is Rth = 110(℃/W)
60
50
40
30
20
10
Ta = 25℃
Ta = 55℃
10
00%
95%
9
90%
9
85%
8
80%
8
75%
7
70%
7
65%
6
60%
6
55%
5
50%
5
45%
4
40%
4
35%
3
30%
3
25%
2
20%
2
15%
1
10%
1
5%
0
Ta = 85℃
Due to above curve, when SSOP24 type package in operating Iout(max) = 50mA
LSD9016-X24T is adviced to choice duty cycle, around 65%.
It should be sure to operate more safety.
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
10. Package Dimension
SOP24
All Unit : mm
SOP24L
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
10. Package Dimension
SSOP24
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Advanced Material on Silicon
LSD9016 16ch Constant Current LED Driver
Revision History
Date
Description
REV 0.0
2009/3/20
First Edition ( Preliminary )
REV 0.1
2009/4/20
“7-4 Constant Current Output Characteristics” is added.
2009/4/30
“810.Package dimension “ is added.
REV0.2
2009/6/30
SSOP Package is added and SOP Package elimination.
2009/7/1
Contents of Temp sensor elimination.
REV1.0
2009/8/14
9. Application imformation is added
8-4 AC Characteristics is added
REV1.2
2009/10/25
8-4 AC Characteristics is Changed.
REV1.3
2009/11/16
8-2 Recommended Operating Ratings is Changed.
REV1.4
2009/12/28
10. Package dimension is added “SOP24-375-1.27”
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