ST STP16CP05 User Manual

STP16CP05

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

■Can be driven by a 3.3V microcontroller

■Output current: 5-100mA

■Max clock frequency 30MHz

■ESD protection 2.5kV HBM, 200V MM

Description

The STP16CP05 is a monolithic, low voltage, low current power 16-bit shift register designed for LED panel displays. The STP16CP05 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 provide from 5mA to 100mA constant current to drive the LEDs.

The output current setup time is 40ns (typ), thus improving the system performance.

The LEDs' brightness can be controlled by using an external resistor to adjust the STP16CP05 output current.

SO-24

TSSOP24	TSSOP24
	(exposed pad)

The STP16CP05 guarantees a 20V output driving capability, allowing users to connect more LEDs in series.The high clock frequency, 30MHz, makes the device suitable for high data rate transmission. The 3.3V voltage supply is useful in applications that interface with a 3.3V micro controller.

Table 1.	Device summary
	Order codes	Package	Packaging
	STP16CP05MTR	SO-24	1000 parts per reel
	STP16CP05TTR	TSSOP24	2500 parts per reel
	STP16CP05XTTR	TSSOP24 Exposed Pad	2500 parts per reel

July 2007

Rev 4

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www.st.com

Contents	STP16CP05

Contents

1	Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		. 3
	1.1	Pin connection and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	3
2	Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		4
	2.1	Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
	2.2	Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	4
	2.3	Recommended operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	5
3	Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		6
4	Equivalent circuit and outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		8
5	Timing diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		10
6	Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		13
7	Test circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		16
8	Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		18
9	Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .		24

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STP16CP05	Summary description

1 Summary description

	Table 2.	Typical current accuracy
	Output voltage		Current accuracy		Output current	VDD	temp.
			Between bits	Between ICs
	≥ 1.3V		±1.5%	±5%	≥20 to 100 mA	3.3V to 5V	25°C

1.1Pin connection and description

Figure 2. Pin connection

Note:

The exposed pad is electrically not connected

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

5-20

OUT 0-15

Output terminal

21

Input terminal of output enable (active low)

OE

22

SDO

Serial data out terminal

23

R-EXT

Input terminal of an external resistor for constant current programing

24

VDD

Supply voltage terminal

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Electrical ratings	STP16CP05

2 Electrical ratings

2.1Absolute 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. Refer also to the STMicroelectronics SURE Program and other relevant quality documents.

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	100	mA
VI	Input voltage	-0.4 to VDD+0.4	V
IGND	GND terminal current	1600	mA
fCLK	Clock frequency	50	MHz

2.2Thermal data

Table 5.	Thermal data
Symbol	Parameter		Value	Unit
TOPR	Operating temperature range		-40 to +125	°C
TSTG	Storage temperature range		-55 to +150	°C
		DIP-24	60	°C/W
		TSSOP24	85	°C/W
RthJC	Thermal resistance junction-case
		TSSOP24(1)	37.5	°C/W
		Exposed Pad
		SO-24	75	°C/W

1. The exposed pad should be soldered directly to the PCB to realize the thermal benefits.

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STP16CP05	Electrical ratings

2.3Recommended operating conditions

Table 6.		Recommended operating conditions at 25°C
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		100	mA
IOH		Output current		SERIAL-OUT			+1	mA
IOL		Output current		SERIAL-OUT			-1	mA
VIH		Input voltage			0.7VDD		VDD+0.3	V
VIL		Input voltage			-0.3		0.3VDD	V
twLAT		LE pulse width			20			ns
twCLK		CLK pulse width			16			ns
twEN			pulse width		200			ns
		OE		VDD = 3.3V to 5.0V
tSETUP(D)		Setup time for DATA			20			ns
tHOLD(D)		Hold time for DATA			15			ns
tSETUP(L)		Setup time for LATCH			15			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 considered the timings carefully.

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Electrical characteristics	STP16CP05

3 Electrical characteristics

Table 7.	Electrical characteristics
	(VDD = 3.3V to 5V, T = 25°C, unless otherwise specified.)
Symbol	Parameter	Test conditions	Min		Typ	Max	Unit
VIH	Input voltage high level		0.7VDD			VDD	V
VIL	Input voltage low level		GND			0.3VDD	V
IOH	Output leakage current	VOH = 20V				10	µA
VOL	Output voltage	IOL = 1mA				0.4	V
	(Serial-OUT)
VOH	Output voltage	IOH = -1mA	VDD-0.4V				V
	(Serial-OUT)
IOL1		VO = 0.3V, Rext = 3.9kΩ	4.25		5	5.75
IOL2	Output current	VO = 0.3V, Rext = 970Ω	19		20	21	mA
IOL3		VO = 1.3V, Rext = 190Ω	96		100	104
∆IOL1	Output current error	VO = 0.3VREXT = 3.9kΩ			± 5	± 8
∆IOL2	between bit	VO = 0.3VREXT = 970Ω			± 1.5	± 3	%
	(All Output ON)
∆IOL3		VO = 1.3VREXT =190Ω			± 1.2	± 3
RSIN(up)	Pull-up resistor		150		300	600	KΩ
RSIN(down)	Pull-down resistor		100		200	400	KΩ
IDD(OFF1)		REXT = 970			4
	Supply current (OFF)	OUT 0 to 15 = OFF
IDD(OFF2)		REXT = 240			11.2
		OUT 0 to 15 = OFF					mA
IDD(ON1)		REXT = 970			4.5
	Supply current (ON)	OUT 0 to 15 = ON
IDD(ON2)		REXT = 240			11.7
		OUT 0 to 15 = ON
Thermal	Thermal protection				170		°C

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STP16CP05

Electrical characteristics

Table 8.

Switching characteristics (VDD = 5V, T = 25°C, unless otherwise specified.)

Symbol

Parameter

Test conditions

Min

Typ

Max

Unit

tPLH1

Propagation delay time,

VDD = 3.3V

62

90

ns

CLK-

OUTn,

LE = H,

OE

= L

VDD = 5V

39

55

tPLH2

Propagation delay time,

VDD = 3.3V

60

88

ns

LE-

OUTn,

OE

= L

VDD = 5V

41

57

tPLH3

Propagation delay time,

VDD = 3.3V

65

95

ns

OE

-

OUTn,

LE = H

VDD = 5V

43

60

tPLH

Propagation delay time,

VDD = 3.3V

8

12

ns

CLK-SDO

VDD = 5V

5

7

Propagation delay time,

VDD = 3.3V

18

25

tPHL1

CLK-

OUTn,

LE = H,

VIH = VDD

ns

VDD = 5V

16

22

OE = L

VIL = GND

CL = 10pF

VDD = 3.3V

19

25

tPHL2

Propagation delay time,

IO = 20mA

VL = 3.0 V

ns

REXT = 1KΩ

RL = 60 Ω

LE-OUTn, OE = L

VDD = 5V

15

21

tPHL3

Propagation delay time,

VDD = 3.3V

23

31

ns

OE

-

OUTn,

LE = H

VDD = 5V

20

27

tPHL

Propagation delay time,

VDD = 3.3V

8.5

13

ns

CLK-SDO

VDD = 5V

5.5

8

tON

Output rise time

VDD = 3.3V

100

130

10~90% of voltage

ns

VDD = 5V

22

35

waveform

tOFF

Output fall time

VDD = 3.3V

13

18

90~10% of voltage

ns

VDD = 5V

18

25

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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Equivalent circuit and outputs	STP16CP05

4 Equivalent circuit and outputs

Figure 3. OE terminal

Figure 4. LE terminal

Figure 5. CLK, SDI terminal

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