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Teilenummer | STP08DP05 |
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Beschreibung | Low voltage 8-Bit constant current Led sink | |
Hersteller | STMicroelectronics | |
Logo | ||
Gesamt 30 Seiten STP08DP05
Low voltage 8-Bit constant current
Led sink with full outputs error detection
Features
■ Low voltage power supply down to 3V
www.DataSheet4U■.com8 constant current output channels
■ Adjustable output current through external
resistor
■ Short and open output error detection
■ Serial Data IN/Parallel data OUT
■ 3.3V micro driver-able
■ Output current: 5-100mA
■ 30MHz clock frequency
■ Available in high thermal efficiency TSSOP
exposed pad
■ ESD protection 2.5kV HBM, 200V MM
Description
The STP08DP05 is a monolithic, low voltage, low
current power 8-bit shift register designed for LED
panel displays. The STP08DP05 contains a 8-bit
serial-in, parallel-out shift register that feeds a 8-
bitD-type storage register. In the output stage,
eight regulated current sources were designed to
provide 5-100mA constant current to drive the
LEDs.
The STP08DP05 is backward compatible in the
functionality and footprint with STP8C/L596 and
extends its functionality with open and short
detection on the outputs. The detection circuit
checks 3 different conditions that can occur on the
output line: short to GND, short to VO or open line.
The data detection results are loaded in the shift
register and shifted out via the serial line output.
Dip-16
TSSOP16
(Exposed pad)
TSSOP16
SO-16
The detection functionality is implemented without
increasing the pin number, 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 leave from
detection mode. Through an external resistor,
users can adjust the STP08DP05 output current,
controlling in this way the light intensity of LEDs,
in addition, user can adjust LED’s brightness
intensity from 0% to 100% via OE/DM2 pin.
The STP08DP05 guarantees a 20V output driving
capability, allowing users to connect more LEDs in
series. The high clock frequency, 30MHz, also
satisfies the system requirement of high volume
data transmission. The 3.3V of voltage supply is
well useful for applications that interface any
micro from 3.3V. Compared with a standard
TSSOP package, the TSSOP exposed pad
increases heat dissipation capability by a 2.5
factor..
Table 1. Device summary
Part Number
Package
Packaging
STP08DP05B1R
STP08DP05MTR
STP08DP05TTR
STP08DP05XTTR
DIP-16
SO-16 (Tape & Reel)
TSSOP16 (Tape & Reel)
TSSOP16 Exposed-Pad (Tape & Reel)
25 parts per tube
2500 parts per reel
2500 parts per reel
2500 parts per reel
May 2007
Rev 2
1/30
www.st.com
30
Maximum rating
STP08DP05
3.3 Recommended operating conditions
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Table 6. Recommended operating conditions
Symbol
Parameter
Test conditions
Min Typ Max Unit
VDD Supply voltage
VO Output voltage
IO Output current
IOH Output current
IOL Output current
VIH Input voltage
VIL Input voltage
twLAT LE/DM1 pulse width
twCLK CLK pulse width
twEN OE/DM2 pulse width
tSETUP(D) Setup time for DATA
tHOLD(D) Hold time for DATA
tSETUP(L) Setup time for LATCH
fCLK Clock frequency
OUTn
SERIAL-OUT
SERIAL-OUT
VDD = 3.0 to 5.0V
Cascade operation (1)
3.0
5
0.7VDD
-0.3
20
20
200
7
4
15
5.5 V
20 V
100 mA
+1 mA
-1 mA
VDD+0.3
0.3VDD
V
V
ns
ns
ns
ns
ns
ns
30 MHz
1. If the device is connected in cascade, it may not be possible achieve the maximum data transfer. Please
consider the timings carefully.
6/30
6 Page Truth table and timing diagram
7.2 Timing diagram
Figure 7. Timing diagram - normal mode
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STP08DP05
Figure 8. Clock, serial-in, serial-out
12/30
12 Page | ||
Seiten | Gesamt 30 Seiten | |
PDF Download | [ STP08DP05 Schematic.PDF ] |
Teilenummer | Beschreibung | Hersteller |
STP08DP05 | Low voltage 8-Bit constant current Led sink | STMicroelectronics |
STP08DP05 | Low voltage 8-Bit constant current Led sink | STMicroelectronics |
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