LED sink driver with auto power-saving
Features
■ Low voltage power supply down to 3 V
■ 16 constant current output channels
■ Adjustable output current through external
resistor
■ Serial data IN/parallel data OUT
■ Auto power-saving
■ 3.3 V MCU-driving capability
■ Output current: 3 to 40 mA
■ 30 MHz clock frequency
■ Available in high thermal efficiency TSSOP
exposed pad
■ ESD protection: 2 kV HBM, 200 V MM
Description
The STP16CPPS05 is a monolithic, low voltage,
low current power 16-bit shift register designed for
LED panel displays. The device features a 16-bit
serial-in, parallel-out shift register that feeds a
16-bit D-type storage register. In the output stage,
sixteen regulated current sources are designed to
provide 3 to 40 mA of constant current to drive the
LEDs.
Table 1. Device summary
STP16CPPS05
Low voltage 16-bit constant current
Preliminary data
QSOP-24
TSSOP24
The STP16CPPS05 output current can be
adjusted through an external resistor to control
the light intensity of the LEDs.
LED brightness is adjustable from 0% to 100% via
the
OE pin.
The auto power-shutdown and auto power-ON
feature allows the device to save power with no
external intervention.
The STP16CPPS05 guarantees a 20 V output
driving capability, allowing users to connect more
LEDs in series. The high 30 MHz clock frequency
makes the device suitable for high data rate
transmission. The 3.3 V supply is well suited for
applications which interface a 3.3 V MCU.
Compared to a standard TSSOP package, the
TSSOP with exposed pad increases heat
dissipation capability by a factor of 2.5
SO-24
TSSOP24
(exposed pad)
Order codes Package Packaging
STP16CPPS05MTR SO-24 1000 parts per reel
STP16CPPS05TTR TSSOP24 2500 parts per reel
STP16CPPS05XTTR TSSOP24 exposed pad 2500 parts per reel
STP16CPPS05PTR QSOP-24 2500 parts per reel
October 2009 Doc ID 16536 Rev 1 1/29
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
www.st.com
29
Contents STP16CPPS05
Contents
1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.3 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Equivalent circuit and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5 Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1 Auto power-saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
2/29 Doc ID 16536 Rev 1
STP16CPPS05 Summary description
1 Summary description
Table 2. Typical current accuracy
Current accuracy
Output voltage
Between bits Between ICs
≥ 1.3 V ± 1% ± 2% 5 to 40 mA 3.3 V to 5 V 25 °C
1.1 Pin connection and description
Figure 1. Pin connection
Output current
V
DD
Temper ature
Note: The exposed pad should be electrically connected to a metal land electrically isolated or
connected to ground.
Doc ID 16536 Rev 1 3/29
Summary description STP16CPPS05
Table 3. Pin description
Pin n° Symbol Name and function
1 GND Ground terminal
2 SDI Serial data input terminal
3 CLK Clock input terminal
4 LE Latch input terminal - detect mode 1 (see operation principle)
5-20 OUT 0-15
Output terminal
21 OE
Input terminal of output enable (active low) - detect mode 1
(see operation principle)
22 SDO Serial data out terminal
23 R-EXT
24 V
DD
Input terminal for an external resistor for constant current
programming
Supply voltage terminal
4/29 Doc ID 16536 Rev 1
STP16CPPS05 Electrical ratings
2 Electrical ratings
2.1 Absolute maximum ratings
Stressing the device above the ratings listed in the “absolute maximum ratings” table may
cause permanent damage to the device. These are stress ratings only and operation of the
device at these or any other condition above those indicated in the operating sections of this
specification is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
Table 4. Absolute maximum ratings
Symbol Parameter Value Unit
V
DD
V
I
O
V
I
GND
f
CLK
T
1. Such absolute value is based on the thermal shutdown protection.
Supply voltage 0 to 7 V
Output voltage -0.5 to 20 V
O
Output current 50 mA
Input voltage -0.4 to V
I
GND terminal current 800 mA
Clock frequency 50 MHz
Junction temperature range
J
2.2 Thermal data
Table 5. Thermal data
Symbol Parameter Value Unit
T
J-OPR
T
R
T
STG
thJA
Operating free-air temperature range -40 to +125 °C
A
Operating thermal junction temperature range -40 to +150 °C
Storage temperature range -55 to +150 °C
Thermal resistance junctionambient
(1)
(1)
DD
-40 to +170 °C
SO-24 42.7 °C/W
TSSOP24 55 °C/W
(2)
TSSOP24
Exposed Pad
37.5 °C/W
V
QSOP-24 55 °C/W
1. According with JEDEC standard 51-7B
2. The exposed pad should be soldered directly to the PCB to obtain the thermal benefits.
Doc ID 16536 Rev 1 5/29
Electrical ratings STP16CPPS05
2.3 Recommended operating conditions
Table 6. Recommended operating conditions
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
I
I
V
V
t
wLAT
t
wCLK
t
wEN
t
SETUP(D)
t
HOLD(D)
t
SETUP(L)
f
CLK
Supply voltage 3.0 5.5 V
DD
Output voltage 20 V
O
Output current OUTn 3 40 mA
I
O
Output current SERIAL-OUT +1 mA
OH
Output current SERIAL-OUT -1 mA
OL
Input voltage 0.7 V
IH
Input voltage -0.3 0.3 V
IL
LE pulse width
DD
20 ns
CLK pulse width 10 ns
OE pulse width 100 ns
VDD = 3.0 V to 5.0 V
Setup time for DATA 8 ns
Hold time for DATA 5 ns
Setup time for LATCH 8 ns
Clock frequency Cascade operation
(1)
V
DD
30 MHz
1. If the device is connected in cascade, it may not be possible achieve the maximum data transfer.
Please consider the timings carefully.
DD
V
V
6/29 Doc ID 16536 Rev 1
STP16CPPS05 Electrical characteristics
3 Electrical characteristics
VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified.
Table 7. Electrical characteristics
Symbol Parameter Test conditions Min. Typ. Max. Unit
V
V
I
OH
V
V
I
OL1
OL2
I
OL3
ΔI
OL1
OL2
ΔI
OL3
R
SIN(up)
R
SIN(down)
I
DD(OFF1)
Input voltage high level 0.7 V
IH
Input voltage low level GND 0.3 V
IL
DD
Output leakage current VOH = 20 V 1 μA
Output voltage
OL
(serial-OUT)
Output voltage
OH
(serial-OUT)
Output current
Output current error
between bit
(All output ON)
= 1 mA 0.4 V
I
OL
= -1 mA VDD-0.4V V
I
OH
= 0.3 V, R
V
O
VO = 0.3 V, R
VO = 1.3 V, R
VO = 0.3 V, IO = 5 mA
= 4 kΩ
R
EXT
VO = 0.3 V, IO = 20 mA
R
= 980 Ω
EXT
VO = 1.3 V, IO = 40 mA
R
= 490 Ω
EXT
= 4 kΩ 4.75 5 5.25
ext
= 1 kΩ 19 20 21
ext
= 497 Ω 38 40 42
ext
± 1 ± 5
± 0.5 ± 3
± 0.5 ± 3
Pull-up resistor 150 300 600 kΩ
Pull-down resistor 100 200 400 kΩ
R
= 1 kΩ,
EXT
I
= 20 mA,
OUT
5.4 7.5
V
DD
DD
V
V
mAI
%ΔI
OUT 0 to 15 = OFF
Supply current (OFF)
R
= 497 Ω,
I
DD(OFF2)
EXT
= 40 mA OUT 0 to
I
OUT
8.0 9.5
15 = OFF
mA
R
= 1 kΩ,
I
DD(ON1)
I
OUT
EXT
= 20 mA,
5.5 7.5
OUT 0 to 15 = ON
Supply current (ON)
R
= 497 Ω,
I
DD(ON2)
EXT
I
= 40 mA OUT 0 to
OUT
8.1 9.5
15 = ON
I
DD(SH)
Thermal Thermal protection 170 °C
Shut-down current all
latched data = L
VDD = 3.3V 160 200 µA
VDD = 5V 190 240 µA
Doc ID 16536 Rev 1 7/29
Electrical characteristics STP16CPPS05
VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified.
Table 8. Switching characteristics
Symbol Parameter Test conditions Min Typ Max Unit
t
PLH1
Propagation delay time,
CLK-OUTn
, LE = H, OE = L
Propagation delay time,
t
PLH2
t
PLH3
t
LE-OUTn,
= L
OE
Propagation delay time,
OE-OUTn, LE = H
Propagation delay time,
PLH
CLK-SDO
Propagation delay time,
t
PHL1
t
PHL2
CLK-OUTn
OE = L
Propagation delay time,
LE-OUTn,
OE = L
, LE = H,
= V
V
IH
DD
VIL = GND CL = 10 pF
= 20 mA VL = 3.0 V
I
O
R
= 1 KΩ RL = 60 Ω
EXT
Propagation delay time,
t
PHL3
OE-OUTn,
LE = H
t
Propagation delay time,
PHL
CLK-SDO
Output rise time
t
10~90% of voltage
ON
waveform
Output fall time
t
90~10% of voltage
OFF
waveform
CLK rise time
t
r
t
CLK fall time
f
1. In order to achieve high cascade data transfer, please consider tr/tf timings carefully.
(1)
(1)
VDD = 3.3 V 53.5 86.5
= 5 V 32 46.5
V
DD
V
= 3.3 V 48 75.5
DD
= 5 V 30 43
V
DD
= 3.3 V 71.5 118
V
DD
= 5 V 43 62
V
DD
= 3.3 V 15 21 31
V
DD
= 5 V 11 15 21
V
DD
V
= 3.3 V 27.5 39
DD
= 5 V 22 30.5
V
DD
VDD = 3.3 V 11.5 17.5
= 5 V 8 11.5
V
DD
VDD = 3.3 V 24 33.5
= 5 V 21 28.5
V
DD
= 3.3 V 17.5 24 36
V
DD
= 5 V 12.5 17 25
V
DD
VDD = 3.3 V 29 54
= 5 V 10 17
V
DD
VDD = 3.3 V 4.5 6
= 5 V 3.5 5
V
DD
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5000 ns
5000 ns
8/29 Doc ID 16536 Rev 1
STP16CPPS05 Equivalent circuit and outputs
4 Equivalent circuit and outputs
Figure 2. OE terminal
Figure 3. LE terminal
Figure 4. CLK, SDI terminal
Doc ID 16536 Rev 1 9/29
Equivalent circuit and outputs STP16CPPS05
Figure 5. SDO terminal
Figure 6. Block diagram
&
10/29 Doc ID 16536 Rev 1
STP16CPPS05 Timing diagrams
5 Timing diagrams
Table 9. Truth table
CLOCK LE OE SERIAL-IN 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
X L Dn + 3 Dn + 2 ..... Dn - 5 ..... Dn -13 Dn - 13
X H Dn + 3 OFF Dn - 13
Note: OUTn = ON when Dn = H OUTn = OFF when Dn = L
Figure 7. Timing diagram
Note: 1 Latch and output enable terminals are level-sensitive and are not synchronized with rising or
falling edge of CLK signal.
2 When LE terminal is low level, the latch circuit holds previous set of data.
3 When LE terminal is high level, the latch circuit refreshes new set of data from SDI chain.
4 When
5 When
OE terminal is at low level, the output terminals Out 0 to Out 15 respond to data in the
latch circuits, either ‘1’ for ON or ‘0’ for OFF.
OE terminal is at high level, all output terminals are switched OFF.
Doc ID 16536 Rev 1 11/29
Timing diagrams STP16CPPS05
Table 10. Enable IO: shutdown truth table
CLOCK LE SDI0 ........... SDI7 ............ SDI
H All = L Active Not active
L No change No change No change No change
H One or more = H Not active Active X
1. At power-up, the device starts in shutdown mode.
2. Undefined.
Figure 8. Clock, serial-in, serial-out
15
SH
Auto
Power-up
(1)
OUTn
OFF
(2)
12/29 Doc ID 16536 Rev 1
STP16CPPS05 Timing diagrams
Figure 9. Clock, serial-in, latch, enable, outputs
LE
OE
OUTn
Figure 10. Outputs
OUTn
Doc ID 16536 Rev 1 13/29
Typical characteristics STP16CPPS05
6 Typical characteristics
Figure 11. Output current vs. R-EXT resistor
25000
20000
15000
10000
R external (O hm)
5000
0
0 1020304050 6070
Current (mA)
Table 11. Output current vs. R-EXT resistor
R-EXT (Ω) Output current (mA)
23700 1
11730 2
6930 3
4090 5
2025 10
1000 20
667 30
497 40
331 60
14/29 Doc ID 16536 Rev 1
STP16CPPS05 Typical characteristics
)
Conditions:
Temperature = 25 °C, V
= 3.3 V; 5.0 V, I
DD
= 3 mA; 5 mA; 10 mA; 20 mA; 50 mA; 60 mA.
SET
Figure 12. I
vs. dropout voltage (V
SET
drop
)
1200
1000
800
600
400
Min Drop Voltage (mV
200
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65
Current (mA)
Avg @ 3.3V
Avg @ 5.0V
Table 12. I
vs. dropout voltage (V
SET
drop
)
Iout (mA) Avg (mV) @ 3.3 V Avg (mV)@ 5.0 V
33637
57172
10 163 163
20 346 347
40 724 726
60 1080 1110
Doc ID 16536 Rev 1 15/29
Typical characteristics STP16CPPS05
TA = 25 °C, Vdd = 3.3 V; 5 V
Figure 13. Output current vs. ± ΔI
Figure 14. Idd ON/OFF
12
11
10
9
8
7
6
Idd (mA)
5
4
3
2
1
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65
(%)
OL
Iset (mA)
AVG IDD ON @ 5.0 V
AVG IDD ON @ 3.3 V
AVG IDD OFF @ 5.0V
AVG IDD OFF @ 3.3V
16/29 Doc ID 16536 Rev 1
STP16CPPS05 Typical characteristics
Figure 15. Power dissipation vs. package temperature
Note: The exposed pad should be soldered to the PCB to obtain the thermal benefits.
Figure 16. Turn ON output current
characteristics
(1)
Figure 17. Turn OFF output current
characteristics
(2)
Electrical conditions:
Vdd = 3.3 V, Vin = Vdd, Vled = 3.0 V, RL = 60 Ω, CL = 10 pF
Ch1 (Yellow) = OE
, Ch2 (Blue) = CLK, Ch3 (Purple) = VOUT, Ch4 (Green) = OUT
1. The reference level for the TON characteristics is 50% of OE signal and 90% of output current
2. The reference level for the T
characteristics is 50% of OE signal and 10% of output current
OFF
Doc ID 16536 Rev 1 17/29
Typical characteristics STP16CPPS05
6.1 Auto power-saving
The auto power-saving feature minimizes the quiescent current if no active data is detected
on the latches and auto powers-up the device as the first active data is latched.
Figure 18. Auto power-saving feature
Electrical conditions: Temp. = 25 °C, Vdd = 3.3 V, Vin = Vdd, Vled = 3.0 V, RL = 60 Ω, CL = 10 pF
Ch1 (Yellow) = OE
, Ch2 (Blue) = CLK, Ch3 (Purple) = LE, Ch4 (Green) = idd
Idd consumption:
Idd (normal operation) = 4.2 mA
Idd (shut down condition) = 190 µA
18/29 Doc ID 16536 Rev 1
STP16CPPS05 Typical characteristics
Figure 19. First output ON after switching from auto power saving to normal
operating condition
Electrical conditions: temp. = 25 °C, Vdd = 3.3 V, Vin = Vdd, Vled = 3.0 V, Iset = 20 mA
Ch1 (Yellow) = SDI, Ch2 (Blue) = CLK, Ch3 (Purple) = LE, Ch4 (Green) = first output ON
Note: When the device goes from AUTO power saving to normal operative condition, the first
output that switch ON shows TON condition as seen in the plot above.
Doc ID 16536 Rev 1 19/29
Package mechanical data STP16CPPS05
7 Package mechanical data
In order to meet environmental requirements, ST offers these devices in different grades of
ECOPACK
specifications, grade definitions and product status are available at: www.st.com.
ECOPACK
®
packages, depending on their level of environmental compliance. ECOPACK®
®
is an ST trademark.
Table 13. QSOP-24 mechanical data
mm. inch
Dim.
Min Typ Max Min Typ Max
A 1.54 1.62 1.73 0.061 0.064 0.068
A1 0.1 0.15 0.25 0.004 0.006 0.010
A2 1.47 0.058
b 0.31 0.2 0.012 0.008
c 0.254 0.17 0.010 0.007
D 8.56 8.66 8.76 0.337 0.341 0.345
E 5.8 6 6.2 0.228 0.236 0.244
E1 3.8 3.91 4.01 0.150 0.154 0.158
e 0.635 0.025
L 0.4 0.635 0.89 0.016 0.025 0.035
h 0.25 0.33 0.41 0.010 0.013 0.016
< 8° 0°
20/29 Doc ID 16536 Rev 1
STP16CPPS05 Package mechanical data
Figure 20. QSOP-24 package dimensions
Doc ID 16536 Rev 1 21/29
Package mechanical data STP16CPPS05
Table 14. QSOP-24 tape and reel
mm. Inches
Dim.
Min Typ Max Min Typ Max
R1 12.8 13 13.5 5.039 5.118 5.315
R2 330 129.921
R3 100 39.37
eint 16.4 6.457
e1 1.5 2 2.5 0.591 0.787 0.984
Figure 21. QSOP-24 tape and reel dimensions
0.3+/-0.05
0.3+/-0.05
1
1
0
0
.
.
3
3
+
+
/
/
-
0
0
.
.
1
1
2.1 +/-0.1
2.1 +/-0.1
6
6
.
.
5
5
+
+
/
/
-
-
22/29 Doc ID 16536 Rev 1
1.5+1/0
1.5+1/0
0
0
.
.
1
1
2.0+/-0.1
2.0+/-0.1
8 +/-0.1
8 +/-0.1
4.0+/-0.1
4.0+/-0.1
1.75+/-0.1
1.75+/-0.1
7.5+/-0.1
7.5+/-0.1
1.6 +1/-0.1
1.6 +1/-0.1
16 +/-0.3
16 +/-0.3
7217811_C
STP16CPPS05 Package mechanical data
Table 15. TSSOP24 mechanical data
mm. Inches
Dim.
Min Typ Max Min Typ Max
A 1.1 0.043
A1 0.05 0.15 0.002 0.006
A2 0.9 0.035
b 0.19 0.30 0.0075 0.0118
c 0.09 0.20 0.0035 0.0079
D 7.7 7.9 0.303 0.311
E 4.3 4.5 0.169 0.177
e 0.65 BSC 0.0256 BSC
H 6.25 6.5 0.246 0.256
K 0° 8° 0° 8°
L 0.50 0.70 0.020 0.028
Figure 22. TSSOP24 package dimensions
Doc ID 16536 Rev 1 23/29
Package mechanical data STP16CPPS05
Table 16. TSSOP24 exposed pad mechanical data
mm Inches
Dim.
Min Typ Max Min Typ Max
A 1.2 0.047
A1 0.15 0.004 0.006
A2 0.8 1 1.05 0.031 0.039 0.041
b 0.19 0.30 0.007 0.012
c 0.09 0.20 0.004 0.0089
D 7.7 7.8 7.9 0.303 0.307 0.311
D1 4.7 5.0 5.3 0.185 0.197 0.209
E 6.2 6.4 6.6 0.244 0.252 0.260
E1 4.3 4.4 4.5 0.169 0.173 0.177
E2 2.9 3.2 3.5 0.114 0.126 0.138
e 0.65 0.0256
K 0° 8° 0° 8°
L 0.45 0.60 0.75 0.018 0.024 0.030
Figure 23. TSSOP24 exposed pad dimensions
24/29 Doc ID 16536 Rev 1
STP16CPPS05 Package mechanical data
Table 17. Tape and reel TSSOP24 and TSSOP24 exposed pad
mm. Inches
Dim.
Min Typ Max Min Typ Max
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 22.4 0.882
Ao 6.8 7 0.268 0.276
Bo 8.2 8.4 0.323 0.331
Ko 1.7 1.9 0.067 0.075
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Figure 24. TSSOP24 and TSSOP24 exposed pad tape and reel dimensions
Doc ID 16536 Rev 1 25/29
Package mechanical data STP16CPPS05
Table 18. SO-24 mechanical data
mm. Inches
Dim.
Min Typ Max Min Typ Max
A 2.65 0.104
a1 0.1 0.2 0.004 0.008
a2 2.45 0.096
b 0.35 0.49 0.014 0.019
b1 0.23 0.32 0.009 0.012
C 0.5 0.020
c1 45°(typ.)
D 15.20 15.60 0.598 0.614
E 10.00 10.65 0.393 0.419
e 1.27 0.050
e3 13.97 0.550
F 7.40 7.60 0.291 0.300
L 0.50 1.27 0.020 0.050
S °(max.) 8
Figure 25. SO-24 package dimensions
26/29 Doc ID 16536 Rev 1
STP16CPPS05 Package mechanical data
Table 19. Tape and reel SO-24
mm. Inches
Dim.
Min Typ Max Min Typ Max
A 330 12.992
C 12.8 13.2 0.504 0.519
D 20.2 0.795
N 60 2.362
T 30.4 1.197
Ao 10.8 11.0 0.425 0.433
Bo 15.7 15.9 0.618 0.626
Ko 2.9 3.1 0.114 0.122
Po 3.9 4.1 0.153 0.161
P 11.9 12.1 0.468 0.476
Figure 26. SO-24 tape and reel dimensions
Doc ID 16536 Rev 1 27/29
Revision history STP16CPPS05
8 Revision history
Table 20. Document revision history
Date Revision Changes
23-Oct-2009 1 Initial release.
28/29 Doc ID 16536 Rev 1
STP16CPPS05
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Doc ID 16536 Rev 1 29/29
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