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January 2010 Doc ID 12569 Rev 6 1/27

STP16CPS05

Low voltage 16-bit constant current 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 feature minimizes the

quiescent current if no active data is detected

on the latches

■ Can be driven by a 3.3 V microcontroller

■ Output current: 5-100 mA

■ Max clock frequency 30 MHz

■ ESD protection 2.5 kV HBM, 200 V MM

Description

The STP16CPS05 is a monolithic, low voltage,

low current power 16-bit shift register designed for

LED panel displays. The STP16CPS05 contains 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

provide from 5 mA to 100 mA constant current to

drive the LEDs.

The auto power shut-down and auto power-ON

feature allows the device to save power without

any external intervention.

The output current setup time is 40 ns (typ), thus

improving the system performance.

The LEDs' brightness can be controlled by using

an external resistor to adjust the STP16CPS05

output current.

The STP16CPS05 guarantees a 20 V output

driving capability, allowing users to connect more

LEDs in series. The high clock frequency,

30 MHz, makes the device suitable for high data

rate transmission. The 3.3 V voltage supply is

useful in applications that interface with a 3.3 V

microcontroller.

SO-24

TSSOP24

(exposed pad)

QSOP-24

Table 1. Device summary

Order codes Package Packaging

STP16CPS05MTR SO-24 1000 parts per reel

STP16CPS05TTR TSSOP24 2500 parts per reel

STP16CPS05XTTR TSSOP24 Exposed Pad 2500 parts per reel

STP16CPS05PTR QSOP-24 2500 parts per reel

www.st.com

Summary of content (27 pages)

PAGE 1
STP16CPS05 Low voltage 16-bit constant current 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 feature minimizes the quiescent current if no active data is detected on the latches ■ Can be driven by a 3.3 V microcontroller ■ Output current: 5-100 mA ■ Max clock frequency 30 MHz ■ ESD protection 2.
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Contents STP16CPS05 Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.2 Thermal data . . . . . . . . . . . . . . . . .
PAGE 3
STP16CPS05 1 Summary description Summary description Table 2. Typical current accuracy Current accuracy Output voltage ≥ 1.3 V 1.1 Between ICs ± 1.5 % ±5% Output current VDD Temperature ≥ 20 to 100 mA 3.3 V to 5 V 25 °C Pin connection and description Figure 1. Note: Between bits Pin connection The exposed pad should be electrically connected to a metal land electrically isolated or connected to GND Table 3.
PAGE 4
Electrical ratings STP16CPS05 2 Electrical ratings 2.1 Absolute maximum ratings Stressing the device above the rating 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 conditions 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.
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STP16CPS05 2.3 Electrical ratings Recommended operating conditions Table 6. Symbol Recommended operating conditions at 25 °C Parameter Test conditions Min 3.0 Typ Max Unit 5.5 V 20 V 100 mA VDD Supply voltage VO Output voltage IO Output current OUTn IOH Output current SERIAL-OUT +1 mA IOL Output current SERIAL-OUT -1 mA VIH Input voltage 0.7VDD VDD V VIL Input voltage -0.3 0.
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Electrical characteristics 3 STP16CPS05 Electrical characteristics Table 7. Symbol Electrical characteristics (VDD = 3.3 V to 5 V, T = 25 °C, unless otherwise specified) Parameter Test conditions Min Typ Max Unit VIH Input voltage high level 0.7VDD VDD V VIL Input voltage low level GND 0.3VDD V IOH Output leakage current VOH = 20 V 10 μA VOL Output voltage (Serial-OUT) IOL = 1 mA 0.
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STP16CPS05 Table 8. Electrical characteristics Switching characteristics (VDD = 3.3 to 5 V, T = 25 °C) Symbol Parameter tPLH1 Propagation delay time, CLK-OUTn, LE = H, OE = L tPLH2 Propagation delay time, LE-OUTn, OE = L tPLH3 Propagation delay time, OE-OUTn, LE = H tPLH Propagation delay time, CLK-SDO tPHL1 Propagation delay time, CLK-OUTn, LE = H, OE = L Test conditions Min Typ Max 35 55 VDD = 5 V 17.5 26 VDD = 3.3 V 33.5 52 17 20 VDD = 3.3 V 53.5 84.5 VDD = 5 V 28.5 40.
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Equivalent circuit and outputs 4 8/27 STP16CPS05 Equivalent circuit and outputs Figure 2. OE terminal Figure 3. LE terminal Figure 4.
PAGE 9
STP16CPS05 Equivalent circuit and outputs Figure 5. SDO terminal Figure 6.
PAGE 10
Timing diagrams 5 Timing diagrams Table 9. CLOCK Note: 10/27 Truth table SERIALOUT0 ............. OUT7 ................ OUT15 IN LE OE 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 OUTn = ON when Dn = H OUTn = OFF when Dn = L Figure 7.
PAGE 11
STP16CPS05 Timing diagrams Table 10. CLOCK Note: Enable IO: shut-down truth table LE SDI0 ........... SDI7 ............ SDI15 SH Auto Power-up OUTn H All = L Active Not active OFF L No change No change No change No change H One or more = H Not active Active X At the power-up the device starts in shut-down mode. Figure 8.
PAGE 12
Timing diagrams Figure 9. STP16CPS05 Clock, serial-in, latch, enable, outputs Figure 10.
PAGE 13
STP16CPS05 6 Typical characteristics Typical characteristics Figure 11. Output current-REXT resistor Table 11.
PAGE 14
Typical characteristics STP16CPS05 Figure 12. Output current vs ± ΔIOL(%) Figure 13.
PAGE 15
STP16CPS05 Typical characteristics Figure 14. IDD ON\OFF 14 12 10 Idd ON @3.3V 8 Idd ON @ 5.0V Idd OFF @3.3V 6 Idd OFF @5.0V 4 Electrical Condition: Ta = 25°C VDD = 3.3V; 5.0V VIN = VDD 2 0 0 20 40 60 80 100 Figure 15. Auto power saving Note: Auto power-saving feature minimizes the quiescent current if no active data is detected on the latches and auto-power-up the device at fist active data latched.
PAGE 16
Typical characteristics STP16CPS05 Figure 16. First output ON after switching from auto power saving to normal mode operating condition Note: 16/27 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.
PAGE 17
STP16CPS05 7 Test circuit Test circuit Figure 17. DC characteristic Figure 18.
PAGE 18
Test circuit STP16CPS05 Figure 19. Typical application schematic + C = 10μF Note: VL will be determined by the VF of the LEDs Table 12. Turn ON output current characteristics (1) Table 13. Turn OFF output current characteristics (2) 1. Reference level for the TON characteristics is 50% of OE signal to 90% of output current 2.
PAGE 19
STP16CPS05 8 Package mechanical data Package mechanical data In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. Table 14. 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.
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Package mechanical data STP16CPS05 Figure 20.
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STP16CPS05 Package mechanical data Table 15. TSSOP24 mechanical data mm. inch Dim. Min Typ A A1 Max Min Typ 1.1 0.05 A2 0.15 Max 0.043 0.002 0.9 0.006 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 21.
PAGE 22
Package mechanical data Table 16. STP16CPS05 Tape and reel TSSOP24 mm. inch Dim. Min A Typ Max 330 13.2 Typ Max 2.992 C 12.8 D 20.2 0.795 N 60 2.362 T 0.504 22.4 0.519 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 22.
PAGE 23
STP16CPS05 Package mechanical data Table 17. SO-24 mechanical data mm. inch Dim. Min Typ A a1 Max Min Typ 2.65 0.1 0.104 0.2 a2 Max 0.004 0.008 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 23.
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Package mechanical data Table 18. STP16CPS05 Tape and reel SO-24 mm. inch Dim. Min A Typ Max 330 13.2 Typ Max 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 0.504 30.4 0.519 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 24.
PAGE 25
STP16CPS05 Package mechanical data Table 19. TSSOP24 exposed pad mm inch Dim. Min Typ Max A 1.2 A1 0.15 A2 0.8 b Typ Max 0.047 0.004 0.006 0.039 0.041 1.05 0.031 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 1 Min 0.65 K 0° L 0.45 0.60 0.0256 8° 0° 0.75 0.018 8° 0.
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Revision history 9 STP16CPS05 Revision history Table 20.
PAGE 27
STP16CPS05 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.