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October 2009 Doc ID 15817 Rev 2 1/34

STP16DPPS05

Low voltage 16-bit constant current

LED sink driver with output error detection and auto power-saving

Features

■ Low voltage power supply down to 3 V

■ 16 constant current output channels

■ Adjustable output current through external

resistor

■ Short and open output error detection

■ 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 STP16DPPS05 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. The STP16DPPS05 features open and

short LED detection on the outputs. The detection

circuit checks for 3 different conditions that can

occur on the output line: short to GND, short to V

or open line.

The data detection results are loaded in the shift

registers and shifted out via the serial line output.

The detection functionality is implemented without

increasing the pin count, through a secondary

function of the output enable and latch pin (DM1

and DM2 respectively). A dedicated logic

sequence allows the device to enter or exit from

detection mode. The STP16DPPS05 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/DM2

pin.

The auto power-shutdown and auto power-ON

feature allows the device to save power with no

external intervention.

The STP16DPPS05 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)

QSOP-24

Table 1. Device summary

Order codes Package Packaging

STP16DPPS05MTR SO-24 (tape and reel) 1000 parts per reel

STP16DPPS05TTR TSSOP24 (tape and reel) 2500 parts per reel

STP16DPPS05XTTR

TSSOP24 exposed pad

(tape and reel)

2500 parts per reel

STP16DPPS05PTR QSOP-24 2500 parts per reel

www.st.com

Summary of content (34 pages)

PAGE 1
STP16DPPS05 Low voltage 16-bit constant current LED sink driver with output error detection and auto power-saving Features ■ Low voltage power supply down to 3 V ■ 16 constant current output channels ■ Adjustable output current through external resistor ■ Short and open output error detection ■ Serial data IN/parallel data OUT ■ Auto power-saving ■ 3.
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Contents STP16DPPS05 Contents 1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 2 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.1 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Thermal data . . . . . . . . . . . . . . . . .
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STP16DPPS05 1 Summary description Summary description Table 2. Typical current accuracy Current accuracy Output voltage ≥ 1.3 V 1.1 Between ICs ± 1% ± 2% Output current VDD Temperature 5 to 40 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 ground.
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Summary description Table 3.
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STP16DPPS05 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.
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Electrical ratings 2.3 STP16DPPS05 Recommended operating conditions Table 6. Symbol Recommended operating conditions Parameter Test conditions Min. Typ. Max. Unit 3.0 - 5.5 V - 20 V - 40 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 0.7 VDD - VDD V VIL Input voltage -0.3 - 0.
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STP16DPPS05 3 Electrical characteristics Electrical characteristics VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified. Table 7. Electrical characteristics Symbol Parameter Test conditions VIH Input voltage high level VIL Input voltage low level IOH Output leakage current VOL VOH Max. Unit 0.7 VDD VDD V GND 0.3 VDD V VOH = 20 V 1 μA Output voltage (serial-OUT) IOL = 1 mA 0.4 V Output voltage (serial-OUT) IOH = -1 mA IOL1 Min. Typ. VDD-0.4V V VO = 0.
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Electrical characteristics STP16DPPS05 VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified. Table 8. Symbol Switching characteristics Parameter Test conditions Min Typ Max 53.5 86.5 VDD = 5 V 32 46.5 tPLH1 Propagation delay time, CLK-OUTn, LE/DM1 = H, OE/DM2 = L Propagation delay time, LE/DM1-OUTn, OE/DM2 = L VDD = 3.3 V 48 75.5 tPLH2 VDD = 5 V 30 43 Propagation delay time, OE/DM2-OUTn, LE = H VDD = 3.3 V 71.5 118 tPLH3 43 62 Propagation delay time, CLK-SDO VDD = 3.
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STP16DPPS05 4 Equivalent circuit and outputs Equivalent circuit and outputs Figure 2. OE/DM2 terminal Figure 3. LE/DM1 terminal Figure 4.
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Equivalent circuit and outputs Figure 5. SDO terminal Figure 6. Block diagram STP16DPPS05 %. & %.
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STP16DPPS05 5 Timing diagrams Table 9. CLOCK Note: Truth table LE/DM1 OE/DM2 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 OUTn = ON when Dn = H OUTn = OFF when Dn = L Figure 7.
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Timing diagrams Table 10. CLOCK STP16DPPS05 Enable IO: shutdown truth table LE/DM1 SDI0 ........... SDI7 ............ SDI15 SH Auto Power-up OUTn H All = L Active Not active (1) OFF L No change No change No change No change H One or more = H Not active Active X (2) 1. At power-up, the device starts in shutdown mode. 2. Undefined. Figure 8.
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STP16DPPS05 Timing diagrams Figure 9. Clock, serial-in, latch, enable, outputs LE/DM1 OE/DM2 OUTn Figure 10.
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Typical characteristics 6 STP16DPPS05 Typical characteristics Figure 11. Output current vs. R-EXT resistor 25000 R external (Ohm) 20000 15000 10000 5000 0 0 10 20 30 40 50 60 70 Current (mA) Table 11. 14/34 Output current vs.
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STP16DPPS05 Typical characteristics Conditions: Temperature = 25 °C, VDD = 3.3 V; 5.0 V, ISET = 3 mA; 5 mA; 10 mA; 20 mA; 50 mA; 60 mA. Figure 12. ISET vs. dropout voltage (Vdrop) 1200 Min Drop Voltage (mV) 1000 800 Avg @ 3.3V Avg @ 5.0V 600 400 200 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 Current (mA) Table 12. ISET vs. dropout voltage (Vdrop) Iout (mA) Avg (mV) @ 3.3 V Avg (mV)@ 5.
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Typical characteristics STP16DPPS05 TA = 25 °C, Vdd = 3.3 V; 5 V Figure 13. Output current vs. ± ΔIOL(%) Figure 14. Idd ON/OFF 12 11 10 9 Idd (mA) 8 AVG IDD ON @ 5.0V 7 AVG IDD ON @ 3.3V 6 AVG IDD OFF @ 5.0V 5 AVG IDD OFF @ 3.
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STP16DPPS05 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/DM2, Ch2 (Blue) = SDI, Ch3 (Purple) = VOUT, Ch4 (Green) = OUT 1.
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Error detection mode functionality STP16DPPS05 7 Error detection mode functionality 7.1 Phase one: entering error detection mode From the “normal mode” condition the device can switch to “error mode” by a logic sequence on the OE/DM2 and LE/DM1 pins, as shown in the following table and diagram: Table 13. Entering error detection mode - truth table CLK 1° 2° 3° 4° 5° OE/DM2 H L H H H LE/DM1 L L L H L Figure 18.
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STP16DPPS05 7.2 Error detection mode functionality Phase two: error detection The 16 data bits must be set to “1” in order for all the outputs to be ON during error detection. The data are latched by LE/DM1, after which the outputs are ready for the detection process. When the microcontroller switches the OE/DM2 to LOW, the device drives the LEDs to analyze if an OPEN or SHORT condition has occurred. Figure 19.
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Error detection mode functionality STP16DPPS05 D.U.T. D.U.T. D.U.T. D.U.T. D.U.T. Figure 20.
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STP16DPPS05 7.3 Error detection mode functionality Phase three: resuming normal mode The sequence for reentering normal mode is shown in the following table: Figure 21. Resuming normal mode - timing diagram CLK 1° 2° 3° 4° 5° OE/DM2 H L H H H LE/DM1 L L L L L Note: For proper device operation, the “entering error detection” sequence must be followed by a “resume mode” sequence, it is not possible to insert consecutive equal sequences. 7.4 Error detection conditions Table 14.
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Error detection mode functionality STP16DPPS05 Figure 23. Error detection sequence This LE/DM1 pulse latch the data to the outputs Feeding 16 bit of CLK signal af ter entering the EDM, the SDI signal, set to 1, is loaded in the shif t register OE/DM2 and LE/DM1 sequence signals to start the error detection sequence Ignore On the rising edge of f irst CLK pulse af ter the detection, the SDO provides the Output status f eedback with the sequence Out 15; Out 14…Out 0.
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STP16DPPS05 7.5 Error detection mode functionality 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 24. Auto power-saving feature Conditions: Temp. = 25 °C, Vdd = 3.3 V, Vin = Vdd, VLed = 3.0 V, Iset = 20 mA Ch1 (Yellow) = CLK, Ch2 (Blue) = SDI, Ch3 (Purple) = LE/DM1, Ch4 (Green) = IDD Idd consumption: Idd (normal operation) = 2.
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Error detection mode functionality STP16DPPS05 Figure 25. Auto power-saving feature Conditions: Temp. = 25°C, Vdd = 3.3 V, Vin = Vdd, VLed = 3.0 V, Iset = 20 mA Ch1 (Yellow) = CLK, Ch2 (Blue) = SDI, Ch3 (Purple) = LE/DM1, Ch4 (Green) = IDD Note: 24/34 When the device goes from auto power-saving to normal operating condition, the first output that switches ON shows the TON condition as seen in the plot above.
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STP16DPPS05 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 15. 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 STP16DPPS05 Figure 26.
PAGE 27
STP16DPPS05 Package mechanical data Table 16. QSOP-24 tape and reel mm. Inches Dim. R1 Min Typ Max Min Typ Max 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 27. QSOP-24 tape and reel dimensions 4.0+/-0.1 1.5+1/0 0.3+/-0.05 2.0+/-0.1 7.5+/-0.1 10.3 +/-0.1 8 +/-0.1 2.1 +/-0.1 1.75+/-0.1 16 +/-0.3 1.6 +1/-0.1 6.5 +/- 0.
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Package mechanical data Table 17. STP16DPPS05 TSSOP24 mechanical data mm. Inches Dim. Min Typ A A1 Max 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 28.
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STP16DPPS05 Package mechanical data Table 18. TSSOP24 exposed pad mechanical data mm Inches 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.
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Package mechanical data Table 19. STP16DPPS05 Tape and reel TSSOP24 and TSSOP24 exposed pad mm. Inches Dim. Min A Typ Max Min Typ 330 12.992 C 12.8 D 20.2 0.795 N 60 2.362 T 13.2 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 30.
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STP16DPPS05 Package mechanical data Table 20. SO-24 mechanical data mm. Inches 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 31.
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Package mechanical data Table 21. STP16DPPS05 Tape and reel SO-24 mm. Inches 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 32.
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STP16DPPS05 9 Revision history Revision history Table 22. Document revision history Date Revision Changes 05-Jun-2009 1 Initial release.
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STP16DPPS05 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.