Datasheet

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This is information on a product in full production.

January 2013 Doc ID 18469 Rev 4 1/26

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

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).

SO-24

TSSOP-24

(exposed pad)

QSOP24

Table 1. Device summary

Order codes Package Packaging

STP16CPC26MTR SO-24 1000 parts per reel

STP16CPC26TTR TSSOP24 2500 parts per reel

STP16CPC26XTR TSSOP24 exposed pad 2500 parts per reel

STP16CPC26PTR QSOP24 2500 parts per reel

www.st.com

Summary of content (26 pages)

PAGE 1
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 QSOP24 ■ 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.
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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 2. Pin connection $0 Y Note: The exposed-pad (if present) should be electrically connected to a metal land electrically isolated or connected to ground. Table 2.
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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. Table 3.
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STP16CPC26 3 Electrical characteristics Electrical characteristics VDD = 3.3 V - 5 V, TA = 25°C, unless otherwise specified Table 5. Symbol Electrical characteristics Parameter Test conditions Min. Typ. Vdd Supply voltage VIH Input voltage high Level 0.8*Vdd - Vdd VIL Input voltage low Level GND - 0.2*Vdd VOL Serial data output voltage (SDO) (1) IOH =- 1mA IOL =+ 1mA - - 0.4 VDD -0.4 - - Output leakage current Vo = 20V, Outn = OFF - - 0.
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Electrical characteristics STP16CPC26 VDD = 3.3 V - 5 V, Tj = 25°C, unless otherwise specified Table 6. Switching characteristics Symbol Parameter fclk Clock frequency tPLH1 CLK - OUTn tPLH2 LE - OUTn tPLH3 OE – OUTn Conditions Min. Typ. Max. Unit - - 30 MHz - 100 - - 100 - - 100 - VDD=3.3V - 30 - VDD=5V - 20 - - 28 - - 28 - - 25 - VDD=3.
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STP16CPC26 4 Simplified internal block diagram Simplified internal block diagram Figure 3. 2( /( 6', STP16CPC26 simplified block diagram 287 287 7KHUPDO VKXWGRZQ $QDORJ VWDJH &RQWURO ORJLF /DWFK DQG (QDEOH ELW VKLIW UHJLVWHU 287 5 ( ;7 6'2 &/. ".
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Typical application circuit 5 STP16CPC26 Typical application circuit Figure 4. Typical application circuit /('ĆFRPPRQĆUDLOĆYROWDJH « 6XSSO\ĆYROWDJH 9'' 287 287 287 6', &/.
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STP16CPC26 6 Equivalent circuits for inputs and outputs Equivalent circuits for inputs and outputs Input terminals LE and OE have pull-down and pull-up connection respectively. CLK and SDI must be connected to external circuit to fix the logic level. Figure 5. OE terminal 9'' Nȍ 2( Nȍ $0 Y Figure 6.
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Equivalent circuits for inputs and outputs Figure 7. STP16CPC26 CLK, SDI terminal 9'' Nȍ &/. 6', $0 Y Figure 8.
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STP16CPC26 7 Typical test circuits Typical test circuits Figure 9 and Figure 10 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.). The resistor RL and capacitor CL in parallel connected to each output in Figure 9 simulate a LED behavior. Figure 9.
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Timing diagrams 8 STP16CPC26 Timing diagrams The timing diagram shown in Figure 11 and the truth table in Table 7 explain how to send data to the device.
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STP16CPC26 Timing diagrams Table 7. CLOCK Truth table Serial-IN OUT0 ........... OUT7 .............. OUT15(1) 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 1. OUTn = ON when Dn = H, OUTn = OFF when Dn = L Figure 12.
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Timing diagrams STP16CPC26 Figure 13. Timing for clock signal serial-in data, latch enable, output enable and outputs $0 Y Figure 14.
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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 15. The curve in Figure 16 describes the relation between the current and the resistor connected to R-EXT pin, whereas the Table 8 shows how to set some typical current values. Figure 15. Resistor for current programming 5H[W 5 (;7 $0 Y 5H[W >ȍ @ Figure 16.
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Current generators characteristics 9.2 STP16CPC26 Current accuracy A typical current accuracy of ±1% (±3% maximum) between channels is guaranteed at 22 mA and 55 mA output current (refer to Table 6) and ± 6% (maximum) current accuracy between ICs. 9.3 Generators voltage drop In order to correctly regulate the current, a minimum dropout voltage must be assured across the current generators. Figure 17 and Table 9 provides just an indicative idea about the dropout voltage to assure over the current range.
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STP16CPC26 10 Thermal shutdown Thermal shutdown The STP16CPC26 is featured with a thermal shutdown. This protection is triggered if the junction temperature reaches 170°C. When the thermal shutdown is activated, all outputs are turned off independently on the data latched. Once the temperature decreases (thermal shutdown hysteresis is typically 15°C), the outputs are enabled again and the device keeps on working.
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Package mechanical data 11 STP16CPC26 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 10. 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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STP16CPC26 Figure 18.
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Package mechanical data Table 11. STP16CPC26 TSSOP24 mechanical data mm. inch 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 19.
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STP16CPC26 Package mechanical data Table 12. Tape and reel TSSOP24 mm. inch Dim. Min A Typ Max - 330 13.2 Min Typ Max - 12.992 0.504 - 0.519 C 12.8 - 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 20.
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Package mechanical data Table 13. STP16CPC26 SO-24 mechanical data mm. inch Dim. Min Typ A a1 Max Min 2.65 0.1 Max 0.104 0.2 a2 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 21.
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STP16CPC26 Package mechanical data Table 14. Tape and reel SO-24 mm. inch Dim. Min A Typ Max - 330 13.2 Min Typ Max - 12.992 0.504 - 0.519 C 12.8 - 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 22.
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Package mechanical data Table 15. STP16CPC26 TSSOP24 exposed pad mm inch Dim. Min Typ Max A 1.2 A1 0.15 A2 0.8 b Max 0.047 0.004 0.006 0.039 0.041 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 0.65 K 0° L 0.45 0.60 0.0256 8° 0° 0.75 0.018 Figure 23.
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STP16CPC26 12 Revision history Revision history Table 16. Document revision history Date Revision Changes 04-Mar-2011 1 First release 05-Apr-2011 2 Updated Table 6 19-Jul-2012 3 Updated Table 7. 29-Jan-2013 4 Updated characteristics in Table 5: Electrical characteristics and Table 6: Switching characteristics. Minor text changes.
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STP16CPC26 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.