ST STP16CPPS05 User Manual

STP16CPPS05

Low voltage 16-bit constant current LED sink driver with auto power-saving

Preliminary data

Features

■Low voltage power supply down to 3 V

■16 constant current output channels

■Adjustable output current through external resistor

■Serial data IN/parallel data OUT

■Auto power-saving

■3.3 V MCU-driving capability

■Output current: 3 to 40 mA

■30 MHz clock frequency

■Available in high thermal efficiency TSSOP exposed pad

■ESD protection: 2 kV HBM, 200 V MM

Description

The STP16CPPS05 is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The device features 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 are designed to provide 3 to 40 mA of constant current to drive the LEDs.

QSOP-24

SO-24

TSSOP24	TSSOP24
	(exposed pad)

The STP16CPPS05 output current can be adjusted through an external resistor to control the light intensity of the LEDs.

LED brightness is adjustable from 0% to 100% via the OE pin.

The auto power-shutdown and auto power-ON feature allows the device to save power with no external intervention.

The STP16CPPS05 guarantees a 20 V output driving capability, allowing users to connect more LEDs in series. The high 30 MHz clock frequency makes the device suitable for high data rate transmission. The 3.3 V supply is well suited for applications which interface a 3.3 V MCU. Compared to a standard TSSOP package, the TSSOP with exposed pad increases heat dissipation capability by a factor of 2.5

Table 1.	Device summary
	Order codes	Package	Packaging
	STP16CPPS05MTR	SO-24	1000 parts per reel
	STP16CPPS05TTR	TSSOP24	2500 parts per reel
STP16CPPS05XTTR		TSSOP24 exposed pad	2500 parts per reel
	STP16CPPS05PTR	QSOP-24	2500 parts per reel

October 2009	Doc ID 16536 Rev 1	1/29
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to		www.st.com
change without notice.

Contents	STP16CPPS05

Contents

1	Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 3
	1.1	Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
2	Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		5
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
	2.2	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
	2.3	Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	6
3	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		7
4	Equivalent circuit and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		9
5	Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		11
6	Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		14
	6.1	Auto power-saving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	18
7	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		20
8	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		28

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STP16CPPS05	Summary description

1 Summary description

	Table 2.	Typical current accuracy
	Output voltage		Current accuracy		Output current	VDD	Temperature
			Between bits	Between ICs
	≥ 1.3 V		± 1%	± 2%	5 to 40 mA	3.3 V to 5 V	25 °C

1.1Pin connection and description

Figure 1. Pin connection

Note:	The exposed pad should be electrically connected to a metal land electrically isolated or
	connected to ground.

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Summary description								STP16CPPS05
	Table 3.	Pin description
	Pin n°			Symbol				Name and function
	1			GND				Ground terminal
	2			SDI				Serial data input terminal
	3			CLK				Clock input terminal
	4				LE			Latch input terminal - detect mode 1 (see operation principle)
	5-20							Output terminal
				OUT 0-15
								Input terminal of output enable (active low) - detect mode 1
	21				OE
								(see operation principle)
	22			SDO				Serial data out terminal
	23			R-EXT				Input terminal for an external resistor for constant current
								programming
	24			VDD				Supply voltage terminal

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STP16CPPS05	Electrical ratings

2 Electrical ratings

2.1Absolute maximum ratings

Stressing the device above the ratings 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 condition 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 4.	Absolute maximum ratings
Symbol	Parameter	Value	Unit
VDD	Supply voltage	0 to 7	V
VO	Output voltage	-0.5 to 20	V
IO	Output current	50	mA
VI	Input voltage	-0.4 to VDD	V
IGND	GND terminal current	800	mA
fCLK	Clock frequency	50	MHz
T	Junction temperature range (1)	-40 to +170	°C
J

1. Such absolute value is based on the thermal shutdown protection.

2.2Thermal data

Table 5.	Thermal data
Symbol	Parameter			Value	Unit
TA	Operating free-air temperature range			-40 to +125	°C
TJ-OPR	Operating thermal junction temperature range			-40 to +150	°C
TSTG	Storage temperature range			-55 to +150	°C
			SO-24	42.7	°C/W
	Thermal resistance junction-		TSSOP24	55	°C/W
RthJA
			TSSOP24(2)
	ambient (1)			37.5	°C/W
			Exposed Pad
			QSOP-24	55	°C/W

1.According with JEDEC standard 51-7B

2.The exposed pad should be soldered directly to the PCB to obtain the thermal benefits.

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Electrical ratings	STP16CPPS05

2.3Recommended operating conditions

Table 6.		Recommended operating conditions
Symbol			Parameter	Test conditions	Min.	Typ.	Max.	Unit
VDD		Supply voltage			3.0		5.5	V
VO		Output voltage					20	V
IO		Output current		OUTn	3		40	mA
IOH		Output current		SERIAL-OUT			+1	mA
IOL		Output current		SERIAL-OUT			-1	mA
VIH		Input voltage			0.7 VDD		VDD	V
VIL		Input voltage			-0.3		0.3 VDD	V
twLAT		LE pulse width			20			ns
twCLK		CLK pulse width			10			ns
twEN			pulse width		100			ns
		OE		VDD = 3.0 V to 5.0 V
tSETUP(D)		Setup time for DATA			8			ns
tHOLD(D)		Hold time for DATA			5			ns
tSETUP(L)		Setup time for LATCH			8			ns
fCLK		Clock frequency		Cascade operation (1)			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.

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STP16CPPS05	Electrical characteristics

3 Electrical characteristics

VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified.
Table 7.	Electrical characteristics
Symbol	Parameter	Test conditions	Min.	Typ.	Max.	Unit
VIH	Input voltage high level		0.7 VDD		VDD	V
VIL	Input voltage low level		GND		0.3 VDD	V
IOH	Output leakage current	VOH = 20 V			1	μA
VOL	Output voltage	IOL = 1 mA			0.4	V
	(serial-OUT)
VOH	Output voltage	IOH = -1 mA	VDD-0.4V			V
	(serial-OUT)
IOL1		VO = 0.3 V, Rext = 4 kΩ	4.75	5	5.25
IOL2	Output current	VO = 0.3 V, Rext = 1 kΩ	19	20	21	mA
IOL3		VO = 1.3 V, Rext = 497 Ω	38	40	42
IOL1		VO = 0.3 V, IO = 5 mA		± 1	± 5
		REXT = 4 kΩ
	Output current error
IOL2		VO = 0.3 V, IO = 20 mA		± 0.5	± 3	%
	between bit
		REXT = 980 Ω
	(All output ON)
IOL3		VO = 1.3 V, IO = 40 mA		± 0.5	± 3
		REXT = 490 Ω
RSIN(up)	Pull-up resistor		150	300	600	kΩ
RSIN(down)	Pull-down resistor		100	200	400	kΩ
		REXT = 1 kΩ,
IDD(OFF1)		IOUT = 20 mA,		5.4	7.5
	Supply current (OFF)	OUT 0 to 15 = OFF
IDD(OFF2)		REXT = 497 Ω,
		IOUT = 40 mA OUT 0 to		8.0	9.5
		15 = OFF				mA
IDD(ON1)		REXT = 1 kΩ,
		IOUT = 20 mA,		5.5	7.5
	Supply current (ON)	OUT 0 to 15 = ON
IDD(ON2)		REXT = 497 Ω,
		IOUT = 40 mA OUT 0 to		8.1	9.5
		15 = ON
IDD(SH)	Shut-down current all	VDD = 3.3V		160	200	µA
	latched data = L	VDD = 5V		190	240	µA
Thermal	Thermal protection			170		°C

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Electrical characteristics

STP16CPPS05

VDD = 3.3 V to 5 V, TA = 25 °C, unless otherwise specified.

Table 8.

Switching characteristics

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

tPLH1

Propagation delay time,

VDD = 3.3 V

53.5

86.5

ns

CLK-

OUTn,

LE = H,

OE

= L

VDD = 5 V

32

46.5

Propagation delay time,

VDD = 3.3 V

48

75.5

tPLH2

LE-

OUTn,

ns

VDD = 5 V

30

43

OE

= L

tPLH3

Propagation delay time,

VDD = 3.3 V

71.5

118

ns

OE

-

OUTn,

LE = H

VDD = 5 V

43

62

tPLH

Propagation delay time,

VDD = 3.3 V

15

21

31

ns

CLK-SDO

VDD = 5 V

11

15

21

tPHL1

Propagation delay time,

VDD = 3.3 V

27.5

39

CLK-

OUTn,

LE = H,

VIH = VDD

ns

VDD = 5 V

22

30.5

OE

= L

VIL = GND

CL = 10 pF

Propagation delay time,

VDD = 3.3 V

11.5

17.5

IO = 20 mA

VL = 3.0 V

tPHL2

LE-OUTn,

ns

REXT = 1 KΩ

RL = 60 Ω

VDD = 5 V

8

11.5

OE

= L

Propagation delay time,

VDD = 3.3 V

24

33.5

tPHL3

OE

-

OUTn,

ns

VDD = 5 V

21

28.5

LE = H

tPHL

Propagation delay time,

VDD = 3.3 V

17.5

24

36

ns

CLK-SDO

VDD = 5 V

12.5

17

25

tON

Output rise time

VDD = 3.3 V

29

54

10~90% of voltage

ns

VDD = 5 V

10

17

waveform

tOFF

Output fall time

VDD = 3.3 V

4.5

6

90~10% of voltage

ns

VDD = 5 V

3.5

5

waveform

t

CLK rise time (1)

5000

ns

r

tf

CLK fall time (1)

5000

ns

1. In order to achieve high cascade data transfer, please consider tr/tf timings carefully.

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STP16CPPS05	Equivalent circuit and outputs

4 Equivalent circuit and outputs

Figure 2. OE terminal

Figure 3. LE terminal

Figure 4. CLK, SDI terminal

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