Table of Contents
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Features
■
16 constant current output channels
■
Supply voltage: 3.3 V or 5 V
■
Two PWM selectable counters 12/16-bit of
grayscale
■
Selectable enhanced PWM for ghost effect
reduction
■
Open and short LED detection
■
8-bit current gain control by means of 256
steps in two selectable ranges
■
Single resistor to set the current from 3 mA to
60 mA
■
Programmable progressive output delay
■
Thermal protection and thermal flag
■
UVLO
■
Schmitt trigger input
■
Selectable 16-bit or 256-bit serial data-in
format
■
Max clock frequency: 30 MHz
■
ESD protection 2.5 kV HBM, 200 V MM
■
Drop-in compatible with STP16CP\S\DP05
series
■
Available in high thermal efficiency TSSOP
exposed pad
Applications
■
Video display LED panels
■
RGB backlighting
■
Special lighting
Table 1.
Device summary
Order code
STP1612PW05QTR
STP1612PW05MTR
STP1612PW05TTR
STP1612PW05XTTR
December 2009
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
16-channel LED driver with 16-bit PWM,
8-bit gain and full LED error detection
Description
The STP1612PW05 is a 16-channel constant
current sink LED driver. The maximum output
current value for all the 16 channels is set by a
single resistor from 3 mA to 60 mA. The device
features 8-bit gain (256 steps) for global LED
brightness adjustment with two selectable ranges.
This function is accessible via a serial interface.
The device has an individual adjustable PWM
brightness control for each output channel. The
PWM counters are selectable via a serial
interface with 4096 or 65536 steps (12 or 16 bit).
The STP1612PW05 also provides enhanced
pulse-width modulation counting algorithms called
e-PWM to reduce flickering effects (ghost visual
effects) improving the overall image quality. The
device has a dual size 16-bit or 256-bit shift
register. All the control and the shift register read
back data are accessible via serial interface. The
STP1612PW05 has the capability to detect open
and short LED failure and overtemperature,
reporting the status through SPI line. The device
guarantees a 20 V output driving capability,
allowing the user to connect more LEDs in series.
Package
QFN-24
SO-24
TSSOP24
TSSOP24 exposed pad
Doc ID 15819 Rev 4
STP1612PW05
QFN-24
SO-24
TSSOP24
TSSOP24
exposed pad
Packaging
4000 parts per reel
1000 parts per reel
2500 parts per reel
2500 parts per reel
Preliminary data
1/35
www.st.com
35
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Related Manuals for STMicroelectronics STP1612PW05
Summary of Contents for STMicroelectronics STP1612PW05
- Page 1 All the control and the shift register read back data are accessible via serial interface. The Applications STP1612PW05 has the capability to detect open and short LED failure and overtemperature, ■ Video display LED panels reporting the status through SPI line. The device ■...
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Page 2: Table Of Contents
Contents STP1612PW05 Contents Block diagram ..........4 Summary description . - Page 3 STP1612PW05 Contents Package mechanical data ........25 Revision history .
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Page 4: Block Diagram
Block diagram STP1612PW05 Block diagram Figure 1. Block diagram R-EXT UVLO & POR Dual range gain Serial interface 7-bit DAC 16-bit CTRL command Gradual outputs Configuration delay Register CTRL logic Open/short error detection Shift register PWM data buffer dual size mode... -
Page 5: Summary Description
STP1612PW05 Summary description Summary description Table 2. Typical current accuracy at 5 V Current accuracy Output voltage Output current temp. Between bits Between ICs ≥ 1.0 ± 1.5% ± 6% 15 to 60 25 °C ≥ 0,2 ± 1.5% ± 6% 3 to 15 Table 3. -
Page 6: Pin Connection And Description
Summary description STP1612PW05 Pin connection and description Figure 2. Pin connection 22 21 20 19 OUT15 OUT14 OUT0 OUT13 OUT1 OUT12 OUT2 OUT11 OUT3 OUT10 OUT4 9 10 11 12 Note: The exposed pad should be electrically connected to a metal land electrically isolated or connected to ground Table 4. -
Page 7: Electrical Ratings
STP1612PW05 Electrical ratings Electrical ratings Absolute maximum ratings Stressing the device above the rating listed in the Table 5 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. -
Page 8: Recommended Operating Conditions
Electrical ratings STP1612PW05 Recommended operating conditions Table 7. Recommended operating conditions at 25 °C, V = 5 V Symbol Parameter Test conditions Min. Typ. Max. Unit Supply voltage Output voltage Output current OUTn Output current SERIAL-OUT Output current SERIAL-OUT Input voltage 0.7 V... -
Page 9: Electrical Characteristics
STP1612PW05 Electrical characteristics Electrical characteristics = 25 °C (Unless otherwise specified) Table 8. Electrical characteristics (V = 5.0 V) Symbol Characteristics Test conditions Min. Typ. Max. Unit Supply voltage Maximum output OUT0 ~ OUT15 voltage = 1.2V Output current SDO, T = - 40 ~ 125 °C... - Page 10 Electrical characteristics STP1612PW05 Table 9. Electrical characteristics (V = 3.3 V) Symbol Characteristics Test conditions Min. Typ. Max. Unit Supply voltage Sustaining voltage at OUT0 ~ OUT15 OUT Ports = 1.2 V SDO, T = -40 ~ 125 °C Output current -1.0...
- Page 11 STP1612PW05 Electrical characteristics Figure 3. Test circuit for electrical characteristics OUT0 Function Generator OUT15 PWCLK Logic input waveform =GND = -40 ~ 125 °C Table 10. Switching characteristics (V = 5.0 V) T Symbol Characteristics Conditions Min. Typ. Max. Unit SDI - CLK ↑...
- Page 12 Electrical characteristics STP1612PW05 Table 11. Switching characteristics (V = 3.3 V) Symbol Characteristics Conditions Min. Typ. Max. Unit SDI - DCLK ↑ LE ↑ – DCLK ↑ Setup time LE ↓ – DCLK ↑ CLK ↑ - SDI Hold time CLK ↑...
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Page 13: Timing Waveform
STP1612PW05 Timing waveform Timing waveform Figure 5. Timing waveform PWCLK PWCLK PWCLK Doc ID 15819 Rev 4 13/35... -
Page 14: Principle Of Operation
Principle of operation STP1612PW05 Principle of operation Table 12. Control command Signals combination Description Number of CLK Command name rising edge when The action after a falling edge of LE LE is asserted Data latch High Serial data are transferred to the buffers... - Page 15 STP1612PW05 Principle of operation Figure 6. Timing diagram Doc ID 15819 Rev 4 15/35...
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Page 16: Definition Of Configuration Register
Definition of configuration register STP1612PW05 Definition of configuration register Configuration register Default value 8’b10101011 Table 13. Configuration register Attribute Definition Value Function Shift register Read/Write 0 (default) Shift register length 0 = 16-bit,1 = 256-bit length 0 (default) Safe (OK) -
Page 17: Grey Scales Data Loading
Grey scales data loading Grey scales data loading The STP1612PW05 is able to manage a gray-scale depth of 12 or 16 bits for each output, exploiting an e-PWM algorithm. The bit D of the configuration register is used to select the grey-scale loading. Its value can be set to “0”... -
Page 18: Setting The Pwm Gray Scale Counter
Setting the PWM gray scale counter STP1612PW05 Setting the PWM gray scale counter STP1612PW05 provides a 12-bit or 16-bit PWM color depth. Each serial data input will be implemented according to the e-PWM algorithm. PWM data synchronization STP1612PW05 defines the different counting algorithms that support e-PWM, technology, (scrambled PWM). -
Page 19: Synchronization For Pwm Counting
STP1612PW05 Setting the PWM gray scale counter Synchronization for PWM counting The data synchronization between the incoming data flow and the output channels is managed through the bit A within the configuration register. If the bit A is set to “0” the device performs itself the data synchronization: when all the new data are loaded with a “global latch”, the device wait until all the PWM counter completes... -
Page 20: Error Detection Conditions
STP1612PW05 Error detection conditions The STP1612PW05 can detect open channels (OD) and LED short-circuits (SD). The detection circuitry performs open- and short-circuit detection simultaneously and the image quality will not be impacted since the test duration is short (0.5 µs typ). -
Page 21: Setting Output Current
STP1612PW05 Setting output current Setting output current The output current (I ) is set by an external resistor, R It is calculated from the equation: = 1.24 x G; I = (V ) x 560 R-EXT R-EXT Whereas R is the resistance of the external resistor connected to R-EXT terminal and V is its voltage. -
Page 22: Current Gain Adjustment
Current gain adjustment STP1612PW05 Current gain adjustment Figure 13. Gain vs DA6 - DA0 The bit 9 to bit 2 of the configuration register set the gain of output current, i.e., G. Being 8- bit in total, ranging from 8’b00000000 to 8’b11111111, these bits allow the user to set the output current gain up to 256 levels. -
Page 23: Delay Time Of Staggered Output
STP1612PW05 Delay time of staggered output For example, HC = 1, G = 1.25, D = (256x1.25-128)/3 = 64 the D in binary form would be: D = 64 = 1x2 +0x2 +0x2 +0x2 +0x2 +0x2 +0x2 The bit 9 to bit 2 of the configuration register are set to 8’b1100,0000. -
Page 24: Time-Out Alert Of Gclk Disconnection
Time-out alert of GCLK disconnection STP1612PW05 Time-out alert of GCLK disconnection When the PWCLK signal is disconnected for around 1 second, all output ports will be turned off automatically. This function will protect the LED display system from staying ON indefinitely and prevent excessive current from damaging the power system. - Page 25 STP1612PW05 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.
- Page 26 Package mechanical data STP1612PW05 Table 17. TSSOP24 tape and reel inch Dim. Min. Max. Min. Typ. Max. 12.992 12.8 13.2 0.504 0.519 20.2 0.795 2.362 22.4 0.882 0.268 0.276 0.323 0.331 0.067 0.075 0.153 0.161 11.9 12.1 0.468 0.476 Figure 16. TSSOP24 reel dimensions...
- Page 27 STP1612PW05 Package mechanical data Table 18. SO-24 mechanical data inch Dim. Min. Max. Min. Typ. Max. 2.65 0.104 0.004 0.008 2.45 0.096 0.35 0.49 0.014 0.019 0.23 0.32 0.009 0.012 0.020 45°(typ.) 15.20 15.60 0.598 0.614 10.00 10.65 0.393 0.419 1.27...
- Page 28 Package mechanical data STP1612PW05 Figure 17. SO-24 package dimensions 28/35 Doc ID 15819 Rev 4...
- Page 29 STP1612PW05 Package mechanical data Table 19. SO-24 tape and reel inch Dim. Min. Max. Min. Typ. Max. 12.992 12.8 13.2 0.504 0.519 20.2 0.795 2.362 30.4 1.197 10.8 11.0 0.425 0.433 15.7 15.9 0.618 0.626 0.114 0.122 0.153 0.161 11.9 12.1...
- Page 30 Package mechanical data STP1612PW05 Table 20. TSSOP24 exposed pad inch Dim. Min. Typ. Max. Min. Typ. Max. 0.047 0.15 0.004 0.006 1.05 0.031 0.039 0.041 0.19 0.30 0.007 0.012 0.09 0.20 0.004 0.0089 0.303 0.307 0.311 0.185 0.197 0.209 0.244 0.252...
- Page 31 STP1612PW05 Package mechanical data Table 21. QFN24 (4x4) mechanical data mils Dim. Min. Max. Min. Typ. Max. 1.00 39.4 0.00 0.05 0.18 0.30 11.8 153.5 161.4 76.8 88.6 153.5 161.4 76.8 88.6 0.50 19.7 0.40 0.60 15.7 23.6 Doc ID 15819 Rev 4...
- Page 32 Package mechanical data STP1612PW05 Figure 20. QFN24 (4x4) mechanical drawing 32/35 Doc ID 15819 Rev 4...
- Page 33 STP1612PW05 Package mechanical data Tape & Reel QFNxx/DFNxx (4x4) MECHANICAL DATA inch DIM. MIN. MAX. MIN. TYP. MAX. 12.992 12.8 13.2 0.504 0.519 20.2 0.795 3.898 3.976 14.4 0.567 4.35 0.171 4.35 0.171 0.043 0.157 0.315 Doc ID 15819 Rev 4...
- Page 34 Revision history STP1612PW05 Revision history Table 22. Document revision history Date Revision Changes 17-Jun-2009 Initial release. 10-Aug-2009 Updated Section 9.2 on page 19 Table 12 on page 14 Updated: Figure 2 on page 6 Table 21 on page 31 29-Oct-2009...
- Page 35 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.
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