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Low voltage 16-bit, constant current LED sink driver

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Last Updated: 19/06/2008

Pages: 26

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STP16CP596
Low voltage 16-Bit, constant current LED sink driver
Features

Low voltage power supply down to 3V 16 constant current output channels Adjustable output current through external resistor Serial data IN/parallel data OUT Serial OUT changes state on the falling edges of clock 3.3V micro driver-able Output current: 3-50 mA 25MHz clock frequency Available in high thermal efficiency TSSOP exposed pad
TSSOP24 TSSOP24 (exposed pad) DIP-24 SO-24

Description
The STP16CP596 is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The STP16CP596 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 were designed to provide 3-50mA constant current to drive the LEDs. Compared with the STPIC6C595, the device provides great flexibility and improved performance in LED panel system design. Users can adjust the STP16CP596 output current with an external resistor, controlling the LEDs' light intensity. The STP16CP596 guarantees a 16V output driving capability, allowing users to connect more LEDs in series. The high clock frequency (25MHz) also satisfies the high volume data transmission system requirement. The 3.3V voltage supply is useful for applications that interface any microprocessor from 3.3V. Compared with a standard TSSOP package, the TSSOP exposed pad increases heat dissipation capability by a factor of 2:5.

Order codes
Part number STP16CP596B1R STP16CP596M STP16CP596MTR STP16CP596TTR STP16CP596XTTR May 2006 Package DIP-24 SO-24 (Tube) SO-24 (Tape & Reel) TSSOP24 (Tape & Reel) TSSOP24 Exposed-Pad (Tape & Reel) Rev 4 Packaging 15 parts per tube 40 parts per tube 1000 parts per reel 2500 parts per reel 2500 parts per reel 1/26
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STP16CP596

Contents
1 Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2

Equivalent circuit of inputs and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 2.2 Truth table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 4

Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.1 4.2 Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 6 7 8 9 10

Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Switching characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

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STP16CP596

1 Summary description

1

Summary description
Table 1. Current accuracy
Current accuracy Output Voltage Output Current 0.1V 0.15V 0.25V 0.5V 1.2V 1.4V 3mA/VCC = 5V 5mA/VCC = 5V 10mA/VCC = 5V 20mA/VCC = 5V 40mA/VCC = 5V 50mA/VCC = 5V Between bits 3% 2% 2% 1% 1% 1% 6% 6% 6% 6% 6% 6% Between ICs

1.1

Pin connection and description
Figure 1. Connections diagram

Note:

The Exposed-Pad is electrically not connected

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1 Summary description

STP16CP596
Pin description
Symbol GND SDI CLK LE OUT 0-15 OE SDO R-EXT VDD Ground Terminal Serial data input terminal Clock input terminal Latch input terminal Output terminal Input terminal of output enable (active low) Serial data out terminal Input terminal of an external resistor for constant current programing Supply voltage terminal Name and function

Table 2.
PIN N 1 2 3 4 5-20 21 22 23 24

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STP16CP596

2 Equivalent circuit of inputs and outputs

2

Equivalent circuit of inputs and outputs
Figure 2. OE Terminal

Figure 3.

LE Terminal

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2 Equivalent circuit of inputs and outputs

STP16CP596

Figure 4.

CLK, SDI Terminal

Figure 5.

SDO Terminal

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STP16CP596
Figure 6. Block diagram - normal mode

2 Equivalent circuit of inputs and outputs

2.1

Truth table
Table 3.
Clock

Truth table
LE H L H X X OE L L L L L SERIAL-IN OUT0 . . .. . .. . .... OUT7 . . .. . .. . .... OUT15 Dn Dn + 1 Dn + 2 Dn + 3 Dn + 3 Dn . . . Dn -7 . . . Dn -15 No Change Dn -2 . . . Dn -5 . . . Dn -13 Dn -2 . . . Dn -5 . . . Dn -13 ON SDO Dn -15 Dn -14 Dn -13 Dn -13 Dn -13

No te :

OUT0 to OUT15 = ON when Dn = H; OUT0 to OUT15 = OFF when Dn = L.

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2 Equivalent circuit of inputs and outputs

STP16CP596

2.2

Timing diagram
Figure 7. Timing diagram - normal mode

Note:

Note: The latches circuit holds data when the LE terminal is Low. When the LE terminal is at High level, latch circuit doesn't hold the data it passes from the input to the output. When the OE terminal is at Low level, output terminals OUT0 to OUT15 respond to the data, either ON or OFF. When the OE terminal is at High level, it switches off all the data on the output terminal.

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STP16CP596

3 Waveforms

3

Waveforms
Figure 8. Clock, Serial-IN, Serial-OUT

Figure 9.

Clock, Serial-In, Latch, Enable, Outputs

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3 Waveforms

STP16CP596

Figure 10. Outputs

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STP16CP596

4 Maximum rating

4

Maximum rating
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. Refer also to the STMicroelectronics SURE Program and other relevant quality documents. Table 4.
Symbol VDD VO IO VI IGND fCLK TOPR TSTG Supply Voltage Output Voltage Output Current Input Voltage GND Terminal Current Clock Frequency Operating Temperature Range Storage Temperature Range

Absolute maximum ratings
Parameter Value 0 to 7 -0.5 to 16 50 -0.4 to VDD+0.4 800 25 -40 to +125 -65 to +150 Unit V V mA V mA MHz C C

4.1

Thermal data
Table 5.
Symbol RthJA

Thermal data
Parameter Thermal Resistance Junctionambient DIP-24 SO-24 TSSOP-24 TSSOP-24(1) (exposed pad) 37.5 Unit

60

75

85

C/W

1. The Exposed-Pad should be soldered to the PBC to realize the thermal benefits

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4 Maximum rating

STP16CP596

4.2

Recommended operating conditions
Table 6.
Symbol VDD VO IO IOH IOL VIH VIL twLAT twCLK twEN

Recommended operating conditions
Parameter Supply Voltage Output Voltage Output Current Output Current Output Current Input Voltage Input Voltage LE Pulse Width CLK Pulse Width OE Pulse Width VDD = 3.3V OUTn Serial OUT Serial OUT 0.7VDD -0.3 20 20 400 20 15 15 Cascade Operation(1) 25 3 Test conditions Min. 3.0 Typ. Max. 5.5 16.0 50 +1 -1 VDD+0.3 0.3VDD Unit V V mA mA mA V V ns ns ns ns ns ns MHz

tSETUP(D) Setup Time for DATA tHOLD(D) Hold Time for DATA tREM(L) fCLK
1.

Removal Time for LATCH Clock Frequency

If the device is connected in cascade, it may not be possible achieve the maximum data transfer. Please considered the timings carefully.

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STP16CP596

5 Electrical characteristics

5

Electrical characteristics
Table 7.
Symbol VIH VIL IOH VOL VOH IOL1A Output Current IOL2A IOL1A IOL2A IOL1B Output Current IOL2B IOL1B IOL2B RSIN(up) Output Current Error between bit (All Output ON)

Electrical characteristics (VDD = 3.3V to 5V, T = 25C, unless otherwise specified.)
Parameter Input Voltage High Level Input Voltage Low Level Output Leakage Current VOH = 16 V Test conditions Min. 0.7VDD GND Typ. Max. VDD 0.3VDD 10 0.4 VDD0.4V 2.85 3 3.15 Unit V V A V V mA

Output Voltage (Serial OUT) IOL = 1mA Output Voltage (Serial OUT) IOH = -1mA , VO = 0.2V, REXT = 6.2K VDD = 3.3V VO = 0.5V, REXT = 1K , VDD = 3.3V , VO = 0.2V, REXT = 6.2K VDD = 3.3V VO = 0.5V, REXT = 1K , VDD = 3.3V , VO = 0.2V, REXT = 6.2K VDD = 5V VO = 0.5V, REXT = 1K , VDD = 5V VO = 0.2V, REXT = 6.2K , VDD = 5V VO = 0.5V, REXT = 1K , VDD = 5V 150 100 REXT = OPEN OUT 0 to 15 = OFF Supply Current (OFF) REXT = 6.2K OUT 0 to 15 = OFF REXT = 1K OUT 0 to 15 = OFF REXT = 6.2K OUT 0 to 15 = ON Supply Current (ON) REXT = 1K OUT 0 to 15 = ON 2.9

19.6

20

20.4

mA

Output Current Error between bit (All Outputs ON)

4

6

%

2

3

%

3

3.1

mA

19.6

20

20.4

mA

2

3.5

%

1 300 200 0.3 1 3 1 3

2 600 400

% K K

Pull-up Resistor

RSIN(down) Pull-down Resistor IDD(OFF1) IDD(OFF2) IDD(OFF3) IDD(ON1) IDD(ON2)

mA

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6 Switching characteristics

STP16CP596

6

Switching characteristics
Table 8.
Symbol tPLH1 tPLH2 tPLH3 tPLH tPHL1 tPHL2 tPHL3 tPHL tON tOFF

Switching characteristics (VDD = 3.3V, T = 25C, unless otherwise specified.)
Parameter Propagation Delay Time, CLK-OUTn, LE = H, OE = L Propagation Delay Time, LE-OUTn, OE = L Propagation Delay Time, OE-OUTn, LE = H Propagation Delay Time, CLK-SDO VDD = 3.3V VIL = GND VIH = VDD CL = 13pF VL = 3 V RL = 65 Test conditions Min. Typ. 250 220 200 25 25 25 50 25 10 ~ 90% of voltage waveform 90 ~ 10% of voltage waveform 260 50 Max. 280 250 250 50 50 50 70 50 400 80 Unit ns ns ns ns ns ns ns ns ns ns

IO = 40mA Propagation Delay Time, CLK-OUTn, LE = H, OE = L REXT = 470 Propagation Delay Time, LE-OUTn, OE = L Propagation Delay Time, OE-OUTn, LE = H Propagation Delay Time, CLK-SDO Output Rise Time Output Fall Time

Note: 1 To prevent current overshoot, during the Outputs switching, the overhead output voltage must be less than 1V. 2 The Maximum suggested swithching frequency is up tp 10KHz.

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STP16CP596

7 Test circuit

7

Test circuit
Figure 11. DC Characteristics

Figure 12. AC Characteristics

15/26

8 Typical characteristics

STP16CP596

8

Typical characteristics
Figure 14. Power dissipation vs. temperature package

Figure 13. Output current-REXT resistor

Figure 15. Output current vs. drop voltage

Figure 16. Output current vs IOL(%)

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STP16CP596
Figure 17. Blue powerLED application circuit

8 Typical characteristics

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9 Package mechanical data

STP16CP596

9

Package mechanical data
In order to meet environmental requirements, ST offers these devices in ECOPACK packages. These packages have a Lead-free second level interconnect. The category of second Level Interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK specifications are available at: www.st.com.

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STP16CP596
Table 9.
Ref Min A A1 A2 B B1 c D E E1 e E1 L M 3.18 0 0.41 1.40 0.20 31.62 7.62 6.35 6.60 2.54 7.62 3.43 15 0.125 0 0.38 3.3 0.46 1.52 0.25 31.75 0.51 1.65 0.30 31.88 8.26 6.86 0.016 0.055 0.008 1.245 0.300 0.250 Typ Max 4.32 0.015 Min

9 Package mechanical data

Plastic DIP-24 (0.25) Mechanical data
mm inch Typ Max 0.170

0.130 0.018 0.060 0.010 1.250 0.020 0.065 0.012 1.255 0.325 0.260 0.100 0.300 0.135 15 0.270

Figure 18. Plastic DIP-24 (0.25) Package dimensions

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9 Package mechanical data

STP16CP596

Table 10.
Ref

TSSOP24 Mechanical data
mm Min Typ Max 1.1 0.05 0.9 0.19 0.09 7.7 4.3 0.65 BSC 6.25 0 0.50 6.5 8 0.70 0.246 0 0.020 0.30 0.20 7.9 4.5 0.0075 0.0035 0.303 0.169 0.0256 BSC 0.256 8 0.028 0.15 0.002 0.035 0.0118 0.0079 0.311 0.177 Min inch Typ Max 0.043 0.006

A A1 A2 b c D E e H K L

Figure 19. TSSOP24 Package dimensions

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STP16CP596
Table 11.
Ref Min A C D N T Ao Bo Ko Po P 6.8 8.2 1.7 3.9 11.9 12.8 20.2 60 22.4 7 8.4 1.9 4.1 12.1 0.268 0.323 0.067 0.153 0.468 Typ Max 330 13.2 0.504 0.795 2.362 Min

9 Package mechanical data

Tape & Reel TSSOP24
mm inch Typ Max 12.992 0.519

0.882 0.276 0.331 0.075 0.161 0.476

Figure 20. Reel dimensions

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9 Package mechanical data

STP16CP596

Table 12.
Ref

SO-24 Mechanical data
mm Min Typ Max 2.65 0.1 0.2 2.45 0.35 0.23 0.5 45(typ.) 15.20 10.00 1.27 13.97 7.40 0.50 7.60 1.27 (max.) 8 0.291 0.020 15.60 10.65 0.598 0.393 0.050 0.550 0.300 0.050 0.614 0.419 0.49 0.32 0.014 0.009 0.020 0.004 Min inch Typ Max 0.104 0.008 0.096 0.019 0.012

A a1 a2 b b1 C c1 D E e e3 F L S

Figure 21. SO-24 Package dimensions

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STP16CP596
Table 13.
Ref Min A C D N T Ao Bo Ko Po P 10.8 15.7 2.9 3.9 11.9 12.8 20.2 60 30.4 11.0 15.9 3.1 4.1 12.1 0.425 0.618 0.114 0.153 0.468 Typ Max 330 13.2 0.504 0.795 2.362 Min

9 Package mechanical data

Tape & Reel SO-24
mm inch Typ Max 12.992 0.519

1.197 0.433 0.626 0.122 0.161 0.476

Figure 22. Reel dimensions

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9 Package mechanical data

STP16CP596

Table 14.
Ref

TSSOP24 Exposed-pad
mm Min Typ Max 1.2 0.15 0.004 Min inch Typ Max 0.047 0.006

A A1

A2 b c D D1 E E1 E2 e K L

0.8 0.19 0.09 7.7

1

1.05 0.30 0.20

0.031 0.007 0.004 0.303 0.106

0.039

0.041 0.012 0.0089

7.8 2.7

7.9

0.307

0.311

6.2 4.3

6.4 4.4 1.5 0.65

6.6 4.5

0.244 0.169 0.059

0.252 0.173

0.260 0.177

0.0256 8 0 0.018 0.024 8 0.030

0 0.45 0.60

0.75

Figure 23. TSSOP24 dimensions

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STP16CP596

10 Revision history

10

Revision history
Table 15.
Date 08-Apr-2005 02-May-2005 25-Jul-2005 16-May-2006

Revision history
Revision 1 2 3 4 First Release. Typing Error on the description features. Add note on Fig. 1 and Table 5. New template, few updates Change

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10 Revision history

STP16CP596

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