Datasheet

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April 2017

DocID18469 Rev 6

1/28

This is information on a product in full production.

www.st.com

STP16CPC26

Low voltage 16-bit constant current LED sink driver

Datasheet - production data

Features

 16 constant current output channels

 Adjustable output current through external

resistor

 Output current: 5 mA to 90 mA

 ±1% typical current accuracy bit to bit

 Max clock frequency: 30 MHz

 20 V current generators rated voltage

 3 - 5.5 V power supply

 Thermal shutdown for overtemperature

protection

Applications

 Video display panel LED driver

 Special lighting

Description

The STP16CPC26 is a monolithic, low voltage,

16-bit constant current LED sink driver. The

device contains a 16-bit shift register and data

latches, which convert serial input data into

parallel output format. In the output stage sixteen

regulated current generators provide 5 mA to

90 mA constant current to drive LEDs. The

current is externally adjusted through a resistor.

LED brightness can be adjusted from 0% to

100% via OE pin.

The STP16CPC26 guarantees a 20 V driving

capability, allowing users to connect more LEDs

in series to each current source.

The high 30 MHz clock frequency makes the

device suitable for high data rate transmission.

The thermal shutdown (170 °C with about 15 °C

hysteresis) assures protection from

overtemperature events.

The STP16CPC26 is housed in four different

packages: QSOP24, SO-24, TSSOP-24 and

HTSSOP-24 (with exposed pad).

Table 1: Device summary

Order code

Package

Packing

STP16CPC26MTR

SO-24

1000 parts per reel

STP16CPC26TTR

TSSOP24

2500 parts per reel

STP16CPC26XTR

TSSOP24 exposed pad

2500 parts per reel

STP16CPC26PTR

QSOP-24

2500 parts per reel

Summary of content (28 pages)

PAGE 1
STP16CPC26 Low voltage 16-bit constant current LED sink driver Datasheet - production data Description The STP16CPC26 is a monolithic, low voltage, 16-bit constant current LED sink driver. The device contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. In the output stage sixteen regulated current generators provide 5 mA to 90 mA constant current to drive LEDs. The current is externally adjusted through a resistor.
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Contents STP16CPC26 Contents 1 Pin description ................................................................................ 3 2 Electrical ratings ............................................................................. 4 2.1 Absolute maximum ratings ................................................................ 4 2.2 Thermal data ..................................................................................... 4 3 Electrical characteristics .........................................
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STP16CPC26 1 Pin description Pin description Figure 1: Pin connection The exposed-pad (if present) should be electrically connected to a metal land electrically isolated or connected to ground.
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Electrical ratings STP16CPC26 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.
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STP16CPC26 3 Electrical characteristics Electrical characteristics VDD = 3.3 V - 5 V, TA = 25 °C, unless otherwise specified. Table 5: Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Vdd Supply voltage VIH Input voltage high level 0.8*Vdd - Vdd VIL Input voltage low level GND - 0.2*Vdd VOL VOH Serial data output voltage (SDO) (1) IOH = - 1 mA IOL = + 1 mA IOH Output leakage current ΔIOL1 Current accuracy channel to channel (2)(3) 3 5.5 - - 0.
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Electrical characteristics Symbol %/dVDD Tsd Tsd-hy STP16CPC26 Parameter Test conditions Output current vs. supply voltage regulation (4) Io = 22 mA; VDS = 0.3 V Io = 55 mA; VDS = 0.6 V Thermal shutdown Thermal shutdown hysteresis Min. Typ. Max. Unit - ±1 - %/V - 170 - - 15 20 °C (4) Notes: (1) Specification referred to TJ from -40 °C to +125 °C. Specification over the -40 to +125 °C TJ temperature range are assured by design, characterization and statistical correlation.
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STP16CPC26 VDD = 3.3 V - 5 V, Tj = 25 °C, unless otherwise specified. Electrical characteristics Table 6: Switching characteristics Symbol Parameter fclk Clock frequency tPLH1 CLK - OUTn tPLH2 LE - OUTn tPLH3 tPLHa tPLHb OE – OUTn CLK - OUTn tPHL2 LE - OUTn tPHL3 OE – OUTn tPHLb CLK tw(L) LE tw(OE) OE Typ. Max. Unit - - 30 MHz - 100 - - 100 - - 100 - VDD = 3.
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Simplified internal block diagram 4 STP16CPC26 Simplified internal block diagram Figure 2: STP16CPC26 simplified block diagram 5 Typical application circuit Figure 3: Typical application circuit 8/28 DocID18469 Rev 6
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STP16CPC26 6 Equivalent circuit and outputs Equivalent circuit and outputs Figure 4: OE terminal Figure 5: LE terminal Figure 6: CLK, SDI terminal DocID18469 Rev 6 9/28
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Equivalent circuit and outputs STP16CPC26 Figure 7: SDO terminal 10/28 DocID18469 Rev 6
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STP16CPC26 7 Typical test circuits Typical test circuits Figure 8: "Typical test circuit for electrical characteristics" and Figure 9: "Typical test circuit for switching characteristics" show respectively the typical test circuit used measuring electrical (e.g. input voltage high/low level, output leakage current, supply current, etc.) and switching characteristics (propagation delays, set-up and hold time, rise and fall time of VOUT, etc.).
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Timing diagrams 8 STP16CPC26 Timing diagrams The timing diagram shown in Figure 10: "Timing diagram" and the truth table in Table 7: "Truth table" explain how to send data to the device.
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STP16CPC26 Timing diagrams Figure 11: Timing for clock signal, serial-in and serial out data The correct sampling of the data depends on the stability of the data at SDI on the rising edge of the clock signal and it is assured by a proper data setup and hold time (tSETUP1 And tHOLD), as shown in Figure 11: "Timing for clock signal, serial-in and serial out data". The same figure shows the propagation delay from CLK to SDO (t PLH/tPHL).
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Timing diagrams STP16CPC26 Figure 12: Timing for clock signal serial-in data, latch enable, output enable and outputs Figure 13: Outputs 14/28 DocID18469 Rev 6
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STP16CPC26 Current generators characteristics 9 Current generators characteristics 9.1 Current setting The current of all outputs is programmed through an external resistor connected to R-EXT pin, as shown in Figure 14: "Resistor for current programming".
PAGE 16
Thermal shutdown 9.3 STP16CPC26 Generators voltage drop In order to correctly regulate the current, a minimum dropout voltage must be assured across the current generators. Figure 16: "Dropout voltage vs output current" and Table 9: "Dropout voltage vs output current" provides just an indicative idea about the dropout voltage to assure over the current range.
PAGE 17
STP16CPC26 11 Package information Package information 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.
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Package information 11.
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STP16CPC26 Package information Table 10: QSOP-24 mechanical data mm Dim. Min. Typ. Max. A 1.54 1.62 1.73 A1 0.10 0.15 0.25 A2 1.47 b 0.20 0.31 c 0.17 0.254 D 8.56 8.66 8.76 E 5.80 6.00 6.20 E1 3.80 3.91 4.01 e 0.635 L 0.40 0.635 0.89 h 0.25 0.33 0.
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Package information 11.
PAGE 21
STP16CPC26 Package information Table 11: SO-24 mechanical data mm Dim. Min. Typ. A 2.35 2.65 A1 0.10 0.30 B 0.33 0.51 C 0.23 0.32 D 15.20 15.60 E 7.40 e 7.60 1.27 H 10.00 10.65 h 0.25 0.75 L 0.40 1.27 k 0 8 ddd 11.3 Max. 0.
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Package information STP16CPC26 Table 12: TSSOP24 mechanical data mm Dim. Min. Typ. A A1 1.1 0.05 A2 0.15 0.9 b 0.19 0.30 c 0.09 0.20 D 7.7 7.9 E 4.3 4.5 e 22/28 Max. 0.65 BSC H 6.25 6.5 K 0° 8° L 0.50 0.
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STP16CPC26 11.
PAGE 24
Package information STP16CPC26 Table 13: TSSOP24 exposed pad mechanical data mm Dim. Min. Max. A 1.20 A1 0.15 A2 0.80 b 0.19 0.30 c 0.09 0.20 1.00 1.05 D 7.70 7.80 7.90 D1 4.80 5.00 5.2 E 6.20 6.40 6.60 E1 4.30 4.40 4.50 E2 3.00 3.20 3.40 e L 0.65 0.45 L1 k 060 075 1.00 0° aaa 24/28 Typ. 8° 0.
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STP16CPC26 11.5 Package information TSSOP24, TSSOP24 exposed pad and SO-24 packing information Figure 21: TSSOP24, TSSOP24 exposed pad and SO-24 reel outline Table 14: TSSOP24 and TSSOP24 exposed pad tape and reel mechanical data mm Dim. Min. A Typ. Max. - 330 13.2 C 12.8 - D 20.2 - N 60 - T - 22.4 Ao 6.8 - 7 Bo 8.2 - 8.4 Ko 1.7 - 1.9 Po 3.9 - 4.1 P 11.9 - 12.
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Package information STP16CPC26 Table 15: SO-24 tape and reel mechanical data mm Dim. Min. A Max. - 330 13.2 C 12.8 - D 20.2 - N 60 - T 26/28 Typ. - 30.4 Ao 10.8 - 11.0 Bo 15.7 - 15.9 Ko 2.9 - 3.1 Po 3.9 - 4.1 P 11.9 - 12.
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STP16CPC26 12 Revision history Revision history Table 16: Document revision history Date Revision 04-Mar-2011 1 First release 05-Apr-2011 2 Updated Table 6 19-Jul-2012 3 Updated Table 7. 19-Jul-2012 4 Updated characteristics in Table 5: Electrical characteristics and Table 6: Switching characteristics. Minor text changes. 1-Jun-2014 5 Updated template and value Table 13: TSSOP24 exposed pad mechanical data.
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STP16CPC26 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.