16-bit Constant Current LED Driver with Error Detection

DM137
Version
: A.001
Issue Date : 2007/01/01
File Name : SP-DM137-A.001.doc
Total Pages : 32
16-bit Constant Current LED Driver
with Error Detection
新竹市科學園區展業一路 9 號 7 樓之 1
SILICON TOUCH TECHNOLOGY INC.
9-7F-1, Prosperity Road I, Science Based Industrial Park,
Hsin-Chu, Taiwan 300, R.O.C.
Tel：886-3-5645656
Fax：886-3-5645626
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137
16-bit Constant Current LED Driver
with Error Detection
General Description
DM137 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. Its built-in open/short detection and thermal alarm circuits help users detect LED failures
and overheating. There are two methods to communicate the error messages to the system. One is
through serial output data to indicate which channel has failure. The other is by means of dedicated
Alarm pin.
Features
z
Constant-current outputs: 5mA to 90mA adjustable by one external resistor
z
Maximum output voltage: 17V
z
Maximum clock frequency: 25MHz
z
Built-in LED open/short detection: real-time monitor or smart detection modes
z
Fast detecting response: 0.1us (min.)
z
Over temperature protection:
Alarm (junction temperature > 110°C)
Shutdown (junction temperature > 180°C)
z
Power supply voltage: 3.3V to 5.5V
Applications
z
LED Variable Message Signs (VMS) System
z
Indoor/Outdoor LED Video Display
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 1
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Block Diagram
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 2
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Pin Connection
SSOP28
HSOP28
1
2
3
4
5
6
7
VCC
EN
LAT
CLK
DAI
OS
OUT0
28
27
26
25
24
23
22
Thermal Pad
GND
8
9
10
11
12
13
14
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
OUT7
21
20
19
18
17
16
15
GND
RESERVED
REXT
SDO
ALARM
DAO
OUT15
GND
OUT14
OUT13
OUT12
OUT11
OUT10
OUT9
OUT8
QFN32
OUT8
OUT7
OUT6
OUT5
OUT4
GND
VCC
EN
GND
GND
GND
RESERVED
OUT10
GND
OUT9
OUT11
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 3
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Pin Description
PIN No.
PIN NAME
SSOP28/HSOP28: 1
QFN32: 5
VCC
FUNCTION
Supply voltage terminal.
SSOP28/HSOP28: 2
QFN32: 6
EN
Output enable terminal:
‘H’ for all outputs are turned off ,
‘L’ for all outputs are active.
SSOP28/HSOP28: 3
QFN32: 9
LAT
Input terminal of data strobe. Data on shift register goes through at the rising
edge of LAT (edge trigger). Otherwise, data is latched.
SSOP28/HSOP28: 4
QFN32: 10
CLK
Synchronous clock input terminal for serial data transfer. Data is sampled at the
rising edge of CLK.
SSOP28/HSOP28: 5
QFN32: 11
DAI
Serial data input terminal.
OS
Input open/short detection selection:
‘H’ for LED short detection mode,
‘L’ for LED open detection mode,
‘Edge’*1 for smart detection mode.
OUT0~15
Sink constant-current outputs (open-drain).
SSOP28/HSOP28: 6
QFN32: 12
SSOP28/HSOP28:
7~22
QFN32: 13~28
SSOP28/HSOP28: 23
QFN32: 29
DAO
Serial data output terminal.
Output open drain terminal: (connected to a pull-high resistor)
‘H’ for normal conditions,
‘L’ for LED open/short or chip overheated.
SSOP28/HSOP28: 24
QFN32: 30
ALARM
SSOP28/HSOP28: 25
QFN32: 31
SDO
Serial data output trigger mode selection:
‘H’ means data is shifted out on synchronization to falling edge of CKO,
‘L’ means data is shifted out on synchronization to rising edge of CKO.
SSOP28/HSOP28: 26
QFN32: 32
REXT
External resistors connected between REXT and GND for output current value
setting.
SSOP28/HSOP28: 27
RESERVED Terminal for testing, user should leave this pin open.
QFN32: 3
SSOP28/HSOP28: 28
Thermal pad
QFN32: 1, 2, 4, 7, 8
Thermal pad
*1
GND
Ground terminal.
Rising edge or falling edge. See detailed description (page 14~16).
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 4
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Equivalent Circuit of Inputs and Outputs
1. CLK, DAI, LAT, SDO, EN, OS terminals
2. DAO terminals
3. ALARM terminal
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 5
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Maximum Ratings (Ta=25°C, Tj(max) = 150°C)
CHARACTERISTIC
SYMBOL
RATING
UNIT
Supply Voltage
VCC
-0.3 ~ 7.0
V
Input Voltage
VIN
-0.3 ~ VCC+0.3
V
Output Current
IOUT
100
mA
Output Voltage
VOUT
-0.3 ~ 17
V
Input Clock Frequency
FCKI
25
MHz
GND Terminal Current
IGND
1600
mA
1.1 ( SSOP28 : Ta=25°C)
Power Dissipation
(4 layer PCB)
W
2.11 ( HSOP28 : Ta=25°C)
PD
3.18 ( QFN32 : Ta=25°C)
113.3 (SSOP28 )
Thermal Resistance
Rth(j-a)
°C/W
59.1 (HSOP28 )
39.3 ( QFN32 )
Operating Temperature
Top
-40 ~ 85
°C
Storage Temperature
Tstg
-55 ~ 150
°C
Recommended Operating Condition
CHARACTERISTIC
SYMBOL
CONDITION
MIN.
TYP.
MAX.
UNIT
Supply Voltage
VCC
⎯
3.3
5.0
5.5
V
Output Voltage
VOUT
Driver On
1.0
⎯
0.5VCC
Output Voltage
VOUT
Driver Off
⎯
⎯
17
Output Current
*2
IO
OUTn
5
⎯
90
IOH
VOH = VCC – 0.2 V
⎯
⎯
+1.6
IOL
VOL = 0.2 V
VIH
Input Voltage
*1
VIL
VCC = 3.3 V ~ 5.5V
⎯
⎯
-1.5
0.8VCC
⎯
VCC
0.0
⎯
0.2VCC
Single Chip Operation
Input Clock Frequency
FCKI
Cascade Operation
(SDO=’H’, CL=13pF)
⎯
⎯
15
tw LAT
15
⎯
⎯
CLK Pulse Width
tw CLK
15
⎯
⎯
EN Pulse Width
tw EN
15
⎯
⎯
tw OS
15
⎯
⎯
Set-up Time for DAI
tsetup(D)
10
⎯
⎯
Hold Time for DAI
thold(D)
10
⎯
⎯
Set-up Time for LAT
tsetup(L)
10
⎯
⎯
Hold Time for LAT
thold(L)
10
⎯
⎯
Set-up Time for OS
tsetup(O)
25
⎯
⎯
tdet
100
⎯
⎯
Open/Short Detection Response
*1
*2
V
MHz
25
LAT Pulse Width
VCC = 5.0V
mA
25
Cascade Operation
(SDO=’L’, CL=13pF)
OS Pulse Width
V
ns
Notice that the power dissipation is limited to its package and ambient temperature.
The driver output voltage including any overshoot stress has to be compliant with the maximum voltage (17V).
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 6
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Electrical Characteristics (VCC = 5.0 V, Ta = 25°C unless otherwise noted)
CHARACTERISTIC
SYMBOL
CONDITION
MIN.
TYP.
MAX.
Input Voltage “H” Level
VIH
CMOS logic level
0.8VCC
⎯
VCC
Input Voltage “L” Level
VIL
CMOS logic level
GND
⎯
0.2VCC
IIH
VIH = VCC
⎯
⎯
1.0
IIL
VIL = GND
⎯
⎯
1.0
IOL
VOH = 17 V
⎯
⎯
±1.0
VOL
IOL = 1.5 mA
⎯
⎯
0.2
VOH
IOH= 1.6 mA
VCC-0.2
⎯
⎯
⎯
⎯
±3
%
23.5
25
26.5
mA
Rrext = 2.2 KΩ
VOUT = 1 V ~ 3 V
⎯
±0.1
±0.5
Rrext = 2.2 KΩ
⎯
±1
±4
⎯
0.3
⎯
⎯
0.5VCC
⎯
⎯
110
⎯
⎯
180
⎯
Input Leakage Current
Output Leakage Current
Output Voltage (S-OUT)
Output Current Skew
(Channel-to-Channel)
IOL1
*1
IOL2
*2
Output Voltage Regulation
% / VOUT
Supply Voltage Regulation
% / VCC
LED Open Detection Threshold
V(od)
LED Short Detection Threshold
V(sd)
Thermal Alarm Threshold
T(alm)
Thermal Shutdown Threshold
*3
uA
uA
V
all outputs turn on
%/V
T(sht)
V
°C
junction temperature
Supply Current
V
VOUT = 1.0 V
Rrext = 2.2 KΩ
Output Current Skew
(Chip-to-Chip)
UNIT
IDD(off)
power on
all pins are open
unless VCC and GND
⎯
3.0
⎯
IDD(off)
input signal is static
Rrext = 2.9 KΩ
all outputs turn off
⎯
4.8
⎯
IDD(on)
input signal is static
Rrext = 2.9 KΩ
all outputs turn on
⎯
6.5
⎯
IDD(on)
input signal is static
Rrext = 560 Ω
all outputs turn off
⎯
12.5
⎯
IDD(on)
input signal is static
Rrext = 560 Ω
all outputs turn on
⎯
14.7
⎯
mA
*1
Channel-to-channel skew is defined as the ratio between (any Iout – average Iout) and average Iout, where average
Iout = (Imax + Imin) / 2.
*2
Chip-to-Chip skew is defined as the range into which any output current of any IC falls.
*3
IO excluded.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 7
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Switching Characteristics (VCC = 5.0V, Ta = 25°C unless otherwise noted)
CHARACTERISTIC
SYMBOL
CONDITION
EN-to-OUT15
Propagation Delay
(‘L’ to ‘H’)
LAT-to-OUT15
tpLH
CLK-to-DAO (SDO = ‘L’)
CLK-to-DAO (SDO = ‘H’)
EN-to-OUT15
Propagation Delay
(‘H’ to ‘L’)
tpHL
CLK-to-DAO (SDO = ‘L’)
MAX.
⎯
18
⎯
⎯
20
⎯
⎯
22
⎯
VIL = GND
⎯
15
⎯
⎯
22
⎯
⎯
15
⎯
⎯
20
⎯
⎯
14
⎯
⎯
4.0
⎯
VL = 5.0 V
*1
CLK-to-DAO (SDO = ‘H’)
TYP.
VIH = VCC
Rrext = 2.9 KΩ
LAT-to-OUT15
MIN.
CL
= 13 pF
Output Current Rise Time
tor
Output Current Fall Time
tof
⎯
6.0
⎯
Output Delay Time (OUT(n)-to-OUT(n+1))
tod
⎯
2.0
⎯
Ra = 470 Ω
UNIT
ns
Switching Characteristics (VCC = 3.3V, Ta = 25°C unless otherwise noted)
CHARACTERISTIC
SYMBOL
CONDITION
EN-to-OUT15
Propagation Delay
(‘L’ to ‘H’)
LAT-to-OUT15
CLK-to-DAO (SDO = ‘L’)
tpLH
CLK-to-DAO (SDO = ‘H’)
EN-to-OUT15
Propagation Delay
(‘H’ to ‘L’)
LAT-to-OUT15
CLK-to-DAO (SDO = ‘L’)
*1
MAX.
⎯
35
⎯
⎯
27
⎯
⎯
20
⎯
VIL = GND
⎯
18
⎯
⎯
24
⎯
⎯
31
⎯
⎯
18
⎯
⎯
19
⎯
⎯
43
⎯
VL = 5.0 V
*1
CLK-to-DAO (SDO = ‘H’)
TYP.
VIH = VCC
Rrext = 2.9 KΩ
tpHL
MIN.
CL
= 13 pF
Output Current Rise Time
tor
Output Current Fall Time
tof
⎯
9.0
⎯
Output Delay Time (OUT(n)-to-OUT(n+1))
tod
⎯
2.8
⎯
Ra = 470 Ω
UNIT
ns
CL means the probe capacitance of oscilloscope.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 8
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Timing Diagram
1. CLK-DAI, DAO
2. CLK-LAT
3. LAT-OUT15
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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DM137
4. EN-OUT15
5. OUTn+1-OUTn
6. OS-LAT, CLK (EN=’L’)
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 10
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DM137
Constant-Current Output
Constant-current value of each output channel is set by an external resistor connected between
the REXT pin and GND. The current scale ranging can be adjusted from 5mA to 90mA by varying
the resistor value. The reference voltage of REXT terminal (Vrext) is approximately 0.6V. The
output current value is calculated by the following equation:
Iout(mA)
5
10
20
30
40
50
60
70
80
90
M
99.7
98.1
96.0
94.2
92.5
90.8
89.1
87.1
85.1
84.4
Output Current as a Function of Rrext value
100
90
80
Iout (mA) ~
Iout (mA)
70
Vrext (V)
× M
Rrext (KΩ)
60
50
40
30
20
10
0
0
1
2
3
4
5
6
7
8
9
10
11
12
Rrext (KΩ)
Output Current as a Function of Output Voltage
100
90
80
Iout (mA)
70
60
50
40
30
20
10
0
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
Vout (V)
In order to obtain a good performance of constant-current output, a suitable output voltage is
necessary. Users can get related information about the minimum output voltage above.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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DM137
Serial Data Interface
The serial-in data (DAI) will be clocked into 16 bit shift register synchronized on the rising
edge of the clock (CLK). 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 synchronized on the rising
edge of the strobe signal (LAT); otherwise, the data will be latched. The latch pulse should be sent
after the falling edge of the last clock within a frame data.
The trigger timing of the serial-out data (DAO) can be selected by the SDO pin. When SDO is
set to ‘H’, the data will be shifted out on synchronization to the falling edge of the clock (CLK). And
when SDO is set to ‘L’, the data will be shifted out on synchronization to the rising edge of the
clock.
16-bit Constant Current LED Driver with Error Detection
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DM137
Alarm Function
It can detect the operating status by connecting a pull-high resistor to the open-drain ALARM
pin. The ALARM pin is kept ‘H’ for normal conditions, and shifted to ‘L’ if there is any failure like
LED open/short, overheating or both occurrence. User can determine the different status from the
truth table below:
ALARM
EN
OS
Status
H
L
don’t care
Normal Operation
HÆL
L
L
LED Open or Thermal issue
HÆL
L
H
LED Short or Thermal issue
HÆL
H
don’t care
Thermal Alarm or Shutdown
When the latch is at its rising edge, the ALARM pin will reset to high level and start to detect
once again. It will send out the test result after the next clock pulse. The detection cycle of the alarm
signal will continue until it reaches the rising edge of the latch pulse again. Please see the timing
diagram below:
For actual application, the controller could connect all the ALARM pins with one pull-high
resistor to simplify circuit designs and feedback loops.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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DM137
Thermal Alarm and Shutdown
During operation, when the junction temperature of the IC will reach about 110℃, the ALARM
pin will shift to low level and produce a warning signal. Suggested cooling measures is to start the
fan, lower the output currents and etc. If no cooling measures were activated, the junction
temperature might continue to rise. Once it reaches approximately above 180℃, it will cause the
driver to shutdown all the outputs. Basically, the IC will cool down and return to the safe operating
temperature which is approximately below 110℃. The ALARM pin will reset to high level, disable
the warning, and restart all the outputs at the same time. Operation in the thermal situation for a long
time may cause chip damage permanently.
LED Open/Short Detection
Test result of DM137’s open/short detection could be retrieved from ALARM pin or serial-out
(DAO) data. Setting the OS pin to low level (L) will activate OPEN detection; which identifies a
LED open failure when there is a current passing through the output but the voltage is below 0.3V.
Setting the OS pin to high level (H) will activate SHORT detection; which identifies a LED short
failure when there is a current passing through the output but the voltage is above 1/2 VCC.
DM137 will execute LED open/short detection then save the result within the particular shift
register with the following conditions: 1) the shift register corresponding the particular output
channel saves an image data of ‘1’, 2) the output enable terminal is activated (EN=’L’), and 3) the
rising edge of the latch pulse takes place. By using the error message sent by serial-out, the
controller can identify the status of every LED driven by each channel. For the process of either
16-bit Constant Current LED Driver with Error Detection
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DM137
open or short detection, the image data of the particular channel is always sent as ‘1’ , however, if ‘0’
is retrieved, there must be a LED failure. If the input of image data is ‘0’ or the output enable
terminal is inactive (EN=’H’), it will not execute any detection for the particular channel. The
original image data will be retrieved by serial-out.
With the above operating principle, the controller could continuously retrieve data from
serial-out and compare it with the frame data which have been sent and kept in the memory one by
one. Therefore, once any discrepancy occurs (‘1’Æ’0’), any fail LED of a particular channel can be
clearly identified. Since the detection is now a continuous action, and is able to exist without
shifting between image and detection modes, it does not interrupt the image data flow and the output
display. This is known as “real-time monitor”.
The above mentioned detection method is more suitable for LED Variable Message Signs(VMS)
system. However, for large LED display applications, there could be an additional load to the system
since the frame data that needs to be compared and retrieved is greater within the memory.
Therefore, DM137 provides two alternative solutions for LED open/short detection: The first
solution is to activate the output enable terminal (EN=’L’) and send image data of ‘1’ to all channels.
Failures will be identified when any data of ‘0’ is retrieved from serial-out. By counting the number
of clock pulse, failure channels can be pointed out accurately. With this solution the load and
memory resource of the system can be greatly minimized.
The second method, which is also known as DM137’s “smart” detection, is triggered by using
any change of edge (including rising edge, falling edge, low-high-low, high-low-high) produced by
OS pin. It is recommended placing the signal between strobe signal (LAT) and the first clock (CLK)
of one frame data will activate the detection. LED’s open or short failure is determined by the final
kept level of the OS pin. Turn on all output channels (EN=‘L’) simultaneously, DM137 will
complete the following two actions automatically:
1) Resetting all image data stored within latch registers to’1’. This will save the system
resources and the time of sending at least one frame containing all image data of ‘1’ mentioned
before.
2) Lowering the maximum output current at the same time to about 1/10 of its original value
until the next rising edge of the latch pulse. This is to prevent a glitch perceived when all outputs are
turned on. Finally, counting again the clock to identify the locations of any channels with fail LED.
The impression of “invisible failure detection” is achievable.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 15
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Timing Diagram for LED Open/Short Detection
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Threshold for Short Detection
The default threshold voltage for LED short detection of DM137 is 1/2 VCC. One could
change the default voltage by switching or setting a new voltage of VLED during short detection is
going on. Please see the example below for reference:
Note that the VSHORT should be satisfied with the following inequality:
The new threshold voltage of short detection will be equivalent to:
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Outputs Delay
Large in-rush currents will occur when the system activates all the outputs at once. To reduce
this effect, DM137 is designed to have a constant unit of delay (around 2ns) between outputs. The
delay for every output goes like this: there is no delay for OUT15 and OUT7, 1 unit of delay for
OUT14 and OUT6, 2 units of delay for OUT13 and OUT5 and so on.
Global Brightness Control
DM137 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:
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 18
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
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:
Pd(max)(Watt) =
Tj(junction temperature)(max)(°C)– Ta(ambient temperature)(°C)
Rth(junction-to-air thermal resistance)(°C/Watt)
The relationship between power dissipation and operating temperature can be refer to the figure
below:
Power Dissipation Pd(W)
4.0
3.5
Tj(max)=150°C
QFN32
3.0
Rth(QFN32)=39.3°C/Watt
2.5
Rth(HSOP28)=59.1°C/Watt
HSOP28
Rth(SSOP28)=113.3°C/Watt
2.0
1.5
SSOP28
1.0
0.5
0.0
0
20
40
60
80
100
120
140
160
Ambient Temperature Ta(°C)
The power consumption of IC can be determined by the following equation and should be less than
the maximum allowable power dissipation:
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 19
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Package Outline Dimension
DM137-SSOP
D
h x 45
E
E1
DETAIL A
C
ZD
θ2
0.25 MM
A
C
e
B
R1
R
A1
GAUGE PLANE
0.1MM
θ1
DETAIL A
L
θ
SEATING PLANE
NOTES: DIMENSION D DOES NOT INCLUDE MODE PROTRUSIONS
OR GATE BURRS.
MOLD PROTRUSIONS AND GATE BURRS SHALL NOT EXCEED
0.006 INCH PER SIDE
SYMBOL
A
A1
A2
B
C
e
D
E
E1
L
h
ZD
R1
R
θ
θ1
θ2
JEDEC
DIMENSION IN MM
DIMENSION IN INCH
MIN. NOM. MAX. MIN. NOM. MAX.
1.35
1.63
1.75
0.053 0.064 0.069
0.1
0.15
0.25
0.004 0.006
0.01
1.5
0.059
0.2
0.3
0.008
0.012
0.18
0.25
0.007
0.01
0.635 BASIC
0.025 BASIC
9.80
9.91
10.01 0.386
0.39
0.394
5.79
5.99
6.20
0.228 0.236 0.244
3.81
3.91
3.99
0.150 0.154 0.157
0.41
0.635
1.27
0.016 0.025
0.05
0.25
0.5
0.01
0.02
0.838 REF
0.033 REF
0.2
0.33
0.008
0.013
0.2
0.008
0
8
0
8
0
0
5
10
15
5
10
15
MO - 137 (AF)
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 20
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Package Outline Dimension
DM137-HSOP
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 21
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Package Outline Dimension
DM137-QFN
TOP VIEW
BOTTOM VIEW
0.25 C
D2
D
25
32
25
24
8
17
24
1
17
8
L
E
E2
e
1
32
0.25 C
9
16
16
9
e
b
0.10
M
C AB
A
0.10 C
A3
A1
SEATING PLANE
SYMBOL
A
A1
A3
b
D
D2
E
E2
e
L
y
MIN.
0.70
0
0.18
1.25
1.25
0.30
DIMENSION
(mm)
NOM.
0.75
0.02
0.25 REF
0.23
5.00 BSC
2.70
5.00 BSC
2.70
0.50 BSC
0.40
0.10
yC
MAX.
0.80
0.05
MIN.
27.6
0
0.30
7.09
3.25
49.21
3.25
49.21
0.50
11.81
DIMENSION
(MIL)
NOM.
29.5
0.79
9.84 REF
9.06
196.85 BSC
106.30
196.85 BSC
106.30
19.69 BSC
15.75
3.94
MAX.
31.5
1.97
11.81
127.95
127.95
19.69
Note: 1.DIMENSIONING AND TOLERANCING CONFORM TO ASME Y145.5M-1994.
2. REFER TO JEDEC STD. MO-220 WHHD-2 ISSUE A
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 22
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-SSOP Package and Weight（4 Boxes Set）
SSOP28 - 150 - 0.65
IC
SSOP
50 pcs ICs per Tube
Tube
53cm
Box
100 Tubes per Box
11cm
10cm
61cm
4 Boxes per Carton
Carton
24cm
24cm
64cm
Weight
Item
1
2
3
4
Description
50 pcs DM137-SSOP per Tube
Net Weight of one Box
Net Weight of one Carton
Per Carton Set ( 4 Boxes, 20,000 pcs )
16-bit Constant Current LED Driver with Error Detection
Weight ( Kg )
0.016±5%
0.40±5%
1.24±5%
9.24±5%
Version:A.001
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Page 23
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-SSOP Package and Weight（6 Boxes Set）
SSOP28 - 150 - 0.65
IC
SSOP
50 pcs ICs per Tube
Tube
53cm
Box
100 Tubes per Box
11cm
10cm
61cm
Carton
6 Boxes per Carton
24cm
34cm
64cm
Weight
Item
1
2
3
4
Description
50 pcs DM137-SSOP per Tube
Net Weight of one Box
Net Weight of one Carton
Per Carton Set ( 6 Boxes, 30,000 pcs )
16-bit Constant Current LED Driver with Error Detection
Weight ( Kg )
0.016±5%
0.40±5%
1.44±5%
13.44±5%
Version:A.001
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Page 24
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-SSOP Package and Weight
SSOP28 - 150 - 0.65
IC
SSOP
2,500 pcs ICs per Reel
Reel
1 Reel per Box
35cm
Box
5cm
35cm
5 Boxes per Carton
36cm
Carton
29cm
37cm
38cm
Weight
Item
1
2
3
4
Description
2,500 pcs DM137-SSOP per Reel
Net Weight of one Box
Net Weight of one Carton
Weight (Kg)
0.96±5%
0.24±5%
0.90±5%
Per Carton Set ( 5 Boxes, 12,500 pcs )
16-bit Constant Current LED Driver with Error Detection
6.9±5%
Version:A.001
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Page 25
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-HSOP Package and Weight（4 Boxes Set）
HSOP28 - 300 - 1.25
IC
HSOP
25 pcs ICs per Tube
Tube
53cm
100 Tubes per Box
Box
11cm
10cm
61cm
4 Boxes per Carton
Carton
24cm
24cm
64cm
Weight
Item
1
2
3
4
Description
25 pcs DM137-HSOP per Tube
Net Weight of one Box
Net Weight of one Carton
Per Carton Set ( 4 Boxes, 10,000 pcs )
16-bit Constant Current LED Driver with Error Detection
Weight ( Kg )
0.03±5%
0.40±5%
1.24±5%
14.84±5%
Version:A.001
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Page 26
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-HSOP Package and Weight（6 Boxes Set）
HSOP28 - 300 - 1.25
IC
HSOP
25 pcs ICs per Tube
Tube
53cm
100 Tubes per Box
Box
11cm
10cm
61cm
6 Boxes per Carton
Carton
24cm
34cm
64cm
Weight
Item
1
2
3
4
Description
25 pcs DM137-HSOP per Tube
Net Weight of one Box
Net Weight of one Carton
Per Carton Set ( 6 Boxes, 15,000 pcs )
16-bit Constant Current LED Driver with Error Detection
Weight ( Kg )
0.03±5%
0.40±5%
1.44±5%
21.84±5%
Version:A.001
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Page 27
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-HSOP Package and Weight
HSOP28 - 300 - 1.25
IC
HSOP
1,000 pcs ICs per Reel
Reel
1 Reel per Box
35cm
Box
5cm
35cm
5 Boxes per Carton
36cm
Carton
29cm
37cm
38cm
Item
1
2
3
4
Weight
Description
1,000 pcs DM137-HSOP per Reel
Net Weight of one Box
Net Weight of one Carton
Weight (Kg)
1.48±5%
0.24±5%
0.90±5%
Per Carton Set ( 5 Boxes, 5,000 pcs )
16-bit Constant Current LED Driver with Error Detection
9.5±5%
Version:A.001
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Page 28
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
DM137-QFN Package and Weight
QFN32 - 5 × 5
IC
QFN
2,500 pcs ICs per Reel
Reel
1 Reel per Box
35cm
Box
5cm
35cm
5 Boxes per Carton
36cm
Carton
29cm
37cm
38cm
Item
1
2
3
4
Weight
Description
2,500 pcs DM137-QFN per Reel
Net Weight of one Box
Net Weight of one Carton
Per Carton Set ( 5 Boxes, 12,500 pcs )
16-bit Constant Current LED Driver with Error Detection
Weight (Kg)
0.76±5%
0.24±5%
0.90±5%
5.90±5%
Version:A.001
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Page 29
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
Product Ordering Information
Number / Weight ( typ.)
Part Number
Package Type
Tube / Tray
Reel ( Box included )
DM137-SSOP
SSOP28-150-0.65
50pcs / Tube
0.016kg ± 5%
2,500pcs / Reel
0.96kg ± 5%
DM137-HSOP
HSOP28-300-1.25
25pcs / Tube
0.03kg ± 5%
1,000pcs / Reel
1.48kg ± 5%
DM137-QFN
QFN32-5 × 5
－
2,500pcs / Reel
0.76kg ± 5%
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 30
點晶科技股份有限公司
SILICON TOUCH TECHNOLOGY INC.
DM137
The products listed herein are designed for ordinary electronic applications, such as
electrical appliances, audio-visual equipment, communications devices and so on. Hence,
it is advisable that the devices should not be used in medical instruments, surgical
implants, aerospace machinery, nuclear power control systems, disaster/crime-prevention
equipment and the like. Misusing those products may directly or indirectly endanger
human life, or cause injury and property loss.
Silicon Touch Technology, Inc. will not take any responsibilities regarding the misusage
of the products mentioned above. Anyone who purchases any products described herein
with the above-mentioned intention or with such misused applications should accept full
responsibility and indemnify. Silicon Touch Technology, Inc. and its distributors and all
their officers and employees shall defend jointly and severally against any and all claims
and litigation and all damages, cost and expenses associated with such intention and
manipulation.
16-bit Constant Current LED Driver with Error Detection
Version:A.001
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Page 31