CATALYST CAT4016 Service Manual

16-Channel Constant Current LED Driver

t

CAT4016

FEATURES

 16 Constant current-sink channels
 Serial interface up to 25MHz clock frequency
 3V to 5.5V logic supply
 LED current range from 2mA to 100mA
 LED current set by external RSET resistor
 300mV LED dropout at 30mA
 Thermal shutdown protection
 Available in RoHS-compliant 24-lead SOIC,

TSSOP, QSOP, and 4 x 4mm TQFN packages

APPLICATION

 Billboard Display
 Marquee Display
 Instrument Display
 General Purpose Display

For Ordering Information details, see page 14.

DESCRIPTION

The CAT4016 is a 16 channel constant current driver
for LED billboard and other general display
applications. LED channel currents are programmed
together via an external RSET resistor. Low output
voltage operation on the LED channels as low as 0.4V
(for 2 to 100mA LED current) allows for more power
efficient designs.

A high-speed 4-wire serial interface of up to 25MHz
clock frequency controls each individual channel using
a shift register and latch configuration. A serial output
data pin (SOUT) allows multiple devices to be
cascaded and programmed via one serial interface.
The device also includes a blanking control pin
(BLANK) that can be used to disable all channels
independently of the interface.

Thermal shutdown protection is incorporated in the
device to disable the LED outputs if the die
temperature exceeds a set limit.

The device is available in the 24-lead SOIC, TSSOP,
QSOP and the compact TQFN 4 x 4mm packages.

TYPICAL APPLICATION CIRCUIT

VIN
3V to

5.5V

CONTROLLER

© Catalyst Semiconductor, Inc. 1 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

1µF

BLANK
LATCH
SIN
CLK

LED1VDD

LED2

CAT4016

GND

LED16

SOUT

RSET

20mA

to nex
device

3k

CAT4016

ORDERING INFORMATION

Part Number Package Quantity per Reel Package Marking

CAT4016W-T1 SOIC24

CAT4016Y-T2 TSSOP24

CAT4016VS-T2 QSOP24

CAT4016VSR-T2 QSOP24

CAT4016HV6-T2 TQFN24

CAT4016HV6-GT2 TQFN24

Notes:

(1) Matte-Tin Plated Finish (RoHS-compliant)
(2) NiPdAu Plated Finish (RoHS-compliant)

(1)

1,000 CAT4016W

(1)

2,000 CAT4016Y

(1)

2,000 4016VS

(1)

2,000 4016VSR

(1)

2,000 LAAA

(2)

2,000 LAAD

PIN CONFIGURATION

24-Lead SOIC (W),

TSSOP (Y), QSOP (VS)

24-Lead QSOP (VSR)

GND

SIN

CLK

LATCH

LED1

LED2

LED3

LED4

LED5

LED6

LED7

LED8

124

223

322

421

520

619

718

817

916

10 15

11 14

12 13

VDD

RSET

SOUT

BLANK

LED16

LED15

LED14

LED13

LED12

LED11

LED10

LED9

LED15

LED16

BLANK

SOUT

RSET

VDD

GND

SIN

CLK

LATCH

LED1

LED2

124

223

322

421

520

619

718

817

916

10 15

11 14

12 13

LED14

LED13

LED12

LED11

LED10

LED9

LED8

LED7

LED6

LED5

LED4

LED3

GND

24-Lead TQFN (HV6)

RSET

VDD

1

BLANK

LED16

SOUT

21222324

LED15

1920

LED14

18

2

SIN

CLK

LATCH

LED1

LED2

3

4

5

6

10987

LED3

LED4

LED5

LED7

LED6

1211

LED8

LED13

17

16

LED12

15

LED11

1413LED10

LED9

Doc. No. MD-5028 Rev. C 2 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT4016

ABSOLUTE MAXIMUM RATINGS

Parameter Rating Units

VDD Supply Voltage 6 V
Logic input/output voltage (SIN, SOUT, CLK, BLANK, LATCH) -0.3V to VDD+0.3V V
LEDn voltage 6 V
DC output current on LED1 to LED16 150 mA
Storage Temperature Range -55 to +160
Junction Temperature Range -40 to +150
Lead Soldering Temperature (10sec.) 300

°C
°C
°C

RECOMMENDED OPERATING CONDITIONS

Parameter Range Units

VDD 3.0 to 5.5 V
Voltage applied to LED1 to LED16 0.4 to 5.5 V
LED current RSET control range up to 100 mA
Ambient Temperature Range -40 to +85

°C

ELECTRICAL OPERATING CHARACTERISTICS

DC Characteristics

V

= 5.0V, T

DD

= 25 ºC, over recommended operating conditions unless specified otherwise.

AMB

Symbol Name Conditions Min Typ Max Units

V

= 1V, R

LED

I

LED Current (any channel)

LED-ACC

I

LED-MAT

ΔI

VDD

ΔI

VLED

I

DDOFF

I

DDON

I

LKG

R

LATCH

R

BLANK

V

VIL

V

HYS

IIL

V

OH

VOL

V

RSET

LED Current Matching

- I

(I

LED

LEDAVR

) / I

LEDAVR

LED current regulation vs. V
LED current regulation vs. V

DD

LED

Supply Current (all outputs off)

Supply Current (all outputs on)

LEDn output Leakage V

LATCH Pull-down Resistance 100 180 300 k
BLANK Pull-up Resistance 100 180 300 k

Logic high input voltage

IH

Logic low input voltage

Logic input hysteresis voltage

Logic Input leakage current
(CLK, SIN)

SOUT logic high output voltage
SOUT logic low output voltage

RSET Regulated Voltage 1.17 1.20 1.23 V

V

= 1V, R

LED

= 1V, R

V

LED

V

= 1V, R

LED

V

= 1V, R

LED

V

= 1V, R

LED

within 4.5V and 5.5V

V

DD

LED current 30mA

within 1V and 3V

V

LED

LED current 30mA
R

= 3k 3 8 mA

SET

R

= 750 8.5 mA

SET

R

= 3k 4 9 mA

SET

R

= 750 10 mA

SET

= 5V, outputs off -1 1 µA

LED

VI = VDD or GND -5 0 5 µA

= -1mA

I

OH

I

= 1mA

OL

TSD Thermal Shutdown 160 ºC

T

Thermal Hysteresis 20 ºC

HYST

= 3k 18 20 22

SET

= 1.5k 36 40 44

SET

= 750 80

SET

= 3k ±1.5

SET

= 1.5k -6.0 ±1.5 +6.0

SET

= 750 ±2.0

SET

±0.1 % / V
±0.05 % / V

0.7xV

V

CC

DD

-0.3V

0.1xVDD V

0.3xVDD V V

0.3

mA

%

V

© Catalyst Semiconductor, Inc. 3 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

V

Timing Characteristics

For 3.0V ≤ V

≤ 5.5V, T

DD

= 25 ºC, unless specified otherwise.

AMB

Symbol Name Conditions Min

(1)

Typ

(2)

Max

CLK

f

CLK Clock Frequency 25 MHz

clk

t

CLK Pulse Width High 20 ns

cwh

t

CLK Pulse Width Low 20 ns

cwl

SIN

t

Setup time SIN to CLK 4 ns

ssu

tsh Hold time SIN to CLK 4 ns

LATCH

t

LATCH Pulse width 20 ns

lwh

Tlh Hold time LATCH to CLK 4 ns

T

Setup time LATCH to CLK Channel Stagger Delay 800 ns

lsu

LEDn

tld LED1 Propagation delay LATCH to LED1 off/on 40 300 ns
tls LED Propagation delay stagger LED(n) to LED(n+1) 17 40 ns

t

lst

LED Propagation delay stagger
total

LED1 to LED16 250 ns

tbd BLANK Propagation delay BLANK to LED(n) off/on 60 300 ns

tlr LED rise time (10% to 90%) Pull-up resistor = 5 0 to 3 . 0V 40 200 ns
tlf LED fall time (90% to 10%) Pull- up resistor = 50 t o 3 . 0 V 30 250 ns

SOUT

tor SOUT rise time (10% to 90%) CL = 15pF 5 ns
tof SOUT fall time (90% to 10%) CL = 15pF 5 ns

tod Propagation delay time SOUT CLK to SOUT 8 15 25 ns

(1)

Units

Test Circuit for AC Characteristics

DD

CONTROLLER

Notes:

(1) All min and max values are guaranteed by design.
(2) V

Doc. No. MD-5028 Rev. C 4 © Catalyst Semiconductor, Inc.

= 5V, LED current 30mA.

DD

1µF

BLANK
LATCH
SIN
CLK

RSET

VDD

RSET

CAT4016

GND

LED1

LED16

SOUT

Rp 50

Rp 50

Cl
15pF

V1

3V

Characteristics subject to change without notice

CAT4016

1/f

clk

CLK

t

ssu

t

sh

t

cwl

t

cwh

SIN

t

od

SOUT

t

lh

t

lsu

LATCH

t

lwh

Figure 1. Serial Input Timing Diagram

LATCH

BLANK

t

ld

t

bd

LED1

LED2

LED16

t

ls

t

= 15 t

lst

ls

Figure 2. LED Output Timing Diagram

© Catalyst Semiconductor, Inc. 5 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

TYPICAL PERFORMANCE CHARACTERISTICS

V

= 5.0V, LED current 30mA, all LEDs On, T

DD

LED Current vs. LED Pin Voltage

70
60
50
40
30
20

LED CURRENT [mA]

10

0

0.0 0.3 0.6 0.9 1.2 1.5

LED PIN [V]

LED Current vs. VDD Pin Voltage

31.5

31.0

= 25°C unless otherwise specified.

AMB

Supply Current vs. VDD Pin Voltage

6.0

All LED's ON

5.5

5.0

4.5

4.0

3.5

SUPPLY CU RRENT [mA]

All LED's OFF

3.0

3.0 3.5 4.0 4.5 5.0 5.5

VDD [V]

Supply Current vs. RSET Current

12

All LED's ON

10

30.5

30.0

29.5

LED CURRENT [mA]

29.0

28.5

3.0 3.5 4.0 4.5 5.0 5.5
VDD [V ]

RSET Voltage vs. VDD Pin Voltage

1.30

1.25

1.20

RSET PIN [V]

1.15

1.10

3.0 3.5 4.0 4.5 5.0 5.5

VDD [V]

8
6
4

All LED's OFF

2

SUPPLY CURRENT [mA]

0

0.0 0.5 1.0 1.5 2.0

RSET CURRENT [mA]

LED Current vs. RSET Resistor

100

80

60

40

20

LED CURRENT [mA]

0

0.1 1.0 10.0 100.0

RSET [kΩ]

Doc. No. MD-5028 Rev. C 6 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT4016

TYPICAL PERFORMANCE CHARACTERISTICS

V

= 5.0V, LED current 30mA, all LEDs On, T

DD

RSET Voltage vs. Temperature

1.30

1.25

= 25°C unless otherwise specified.

AMB

LED Current vs. Temperature

31.5

31.0

30.5

1.20

RSET PIN [V]

1.15

1.10

-50 0 50 100 150
TEMPERATURE [°C]

Internal Pull-Down Current (LATCH pin)

30
25

20
15
10

5

PULL -DO WN CURRENT [A] .

0

012345

LATCH VOLTAGE [ V]

PWM Dimming on BLANK pin (f = 10kHz)

30.0

29.5

LED CURRENT [mA]

29.0

28.5

-50 0 50 100 150
TEMP ERA TURE [°C]

Internal Pull-Up Current (BLANK pin)

30
25
20

15
10

5

PULL-UP CURRENT [A] .

0

012345

BLANK VOLTAGE [V]

BLANK Transient Response

100

80

60

40

DUTY CYCLE [%]

20

0

0 5 10 15 20 25 30

LED CURRE NT [ m A]

© Catalyst Semiconductor, Inc. 7 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

PIN DESCRIPTION

Name Function

GND Ground
SIN Serial data input pin
CLK Serial clock input pin
LATCH Latch serial data to output registers
LED1-LED16 LED channel 1 to 16 cathode terminals
BLANK Enable / disable all channels
SOUT Serial data output pin.
RSET LED current set pin
VDD Positive supply Voltage

TAB (TQFN
package only)

Connect to GND on the PCB

PIN FUNCTION

GND is the ground reference pin for the device. This

pin must be connected to the ground plane on the
PCB.

SIN is the serial data input. Data is loaded into the
internal register on each rising edge of CLK.

CLK is the serial clock input. On each rising CLK
edge, data is transferred from SIN to the internal 16­bit serial shift register.

LATCH is the latch data input. On the rising edge of
LATCH, data is loaded from the 16-bit serial shift
register into the output register latch. On the falling
edge, this data is latched in the output register and
isolated from the state of the serial shift register.

LED1 - LED16 are the LED current sink channels.
These pins are connected to the LED cathodes. The
current sinks drive the LEDs with a current equal to 50
times RSET pin current. For the LED sink to operate
correctly, the voltage on the LED pin must be above

0.4V.

BLANK is the LED channel enable and disable input
pin. When low, LEDs are enabled according to the
output latch register content. When high, all LEDs are
off, while preserving the data in the output latch
register.

SOUT is the serial data output of the 16-bit serial shift
register. This pin is used to cascade several devices
on the serial bus. The SOUT pin is then connected to
the SIN input of the next device on the serial bus to
cascade.

RSET is the LED current setting pin. A resistor is
connected between this pin and ground. Each LED
channel current is set to 50 times the current pulled
out of the pin. The RSET pin voltage is regulated to

1.2V.
VDD is the positive supply pin voltage for the entire

device. A small 1µF ceramic is recommended close
to pin.

Doc. No. MD-5028 Rev. C 8 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT4016

BLOCK DIAGRAM

LED1 LED2 LED3 LED16

VDD

VIN

BLANK

LATCH

SIN

CLK

+

L1 L2 L3

S1 S2 S3

CURRENT

LATCHES

REGISTER

Figure 2. CAT4016 Functional Block Diagram

BASIC OPERATION

The CAT4016 uses 16 tightly matched current sinks to
accurately regulate the LED current in each channel.
The external resistor, R
channel current to 50 times the current in R

Tight current regulation for all channels is possible
over a wide range of input and LED voltages due to
independent current sensing circuitry on each
channel. The LED channels have a maximum dropout
of 0.4V for most current and supply voltage
conditions. This helps improve the heat dissipation
and efficiency of the LED driver.

Upon power-up, an under-voltage lockout circuit
clears all latches and shift registers and sets all
outputs to off. Once the under-voltage lockout
threshold has been reached the device can be
programmed.

The driver delays the activation of each consecutive
LED output channel by 17ns (typical). Relative to
LED1, LED2 is delayed by 17ns, LED3 by 34ns and
LED16 by 250ns typical. The delay is introduced when
LATCH is activated. The delay minimizes the inrush
current on the LED supply by staggering the turn on
and off current spikes over a period of time and
therefore allowing usage of smaller bypass capacitors.

, is used to set the LED

SET

.

SET

50 current LED ×=

2.1

R

SET

+

SINKS

SHIFT

Current

Setting

1.2V Ref

L16

S16

RSET

GND

SOUT

Pull-up and pull-down resistors are internally provided
to set the state of the BLANK and LATCH pins to the
off-state when not externally driven.

SERIAL INTERFACE

A high-speed serial 4-wire interface is provided to
program the state of each LED on or off. The
interface contains a 16-bit serial to parallel shift
register (S1-S16) and a 16-bit latch (L1-L16).
Programming the serial to parallel register is
accomplished via SIN and CLK input pins. On each
rising edge of the CLK signal, the data from SIN is
moved through the shift register serially. Data is also
moved out of SOUT which can be connected to a next
device if programming more then one device on the
same interface.

On the rising edge of LATCH, the data contents of the
serial to parallel shift register is reflected in the
latches. On the falling edge of LATCH, the state of the
serial to parallel register at that particular time is
saved in the latches and does not change irrespective
of the contents of the serial to parallel register.

BLANK is used to disable all LEDs (turn off)
simultaneously while maintaining the same data in the
latch register. When low, the LED outputs reflect the
data in the latches. When high, all outputs are high
impedance (zero current).

© Catalyst Semiconductor, Inc. 9 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

PACKAGE OUTLINE DRAWINGS

SOIC 24-Lead 300mils (W)

b

PIN#1 IDENTIFICATION

(1)

e

E1 E

SYMBOL MIN NOM MAX

A2.35 2.65
A1 0.10 0.30
A2 2.05 2.55

b0.31 0.51

c0.20 0.33

D 15.20 15.40

E 10.11 10.51
E1 7.34 7.60

e1.27 BSC

h0.25 0.75

L0.40 1.27

 0° 8°
15° 15°

TOP VIEW

D

A

SIDE VIEW END VIEW

A2

A1

h



h

L

1

1



c

For current Tape and Re el infor mation, do wnload the P DF fil e fro m:
http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MS-013.

Doc. No. MD-5028 Rev. C 10 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT4016

A

(1)

TSSOP 24-Lead 4.4mm (Y)

b

SYMBOL MIN NOM MAX

A1.20
A1 0.05 0.15
A2 0.80 1.05

b 0.19 0.30

E1 E

c 0.09 0.20
D 7.70 7.80 7.90
E 6.25 6.40 6.55

E1 4.30 4.40 4.50

e 0.65 BSC

L 1.00 REF

L1 0.50 0.60 0.70

10° 8°

A2

e

TOP VIEW

D

A

1

1

SIDE VIEW END VIEW

c

L1

L

For current Tape and Re el infor mation, do wnload the P DF fil e fro m:
http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-153.

© Catalyst Semiconductor, Inc. 11 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

(1)

QSOP 24-Lead (VS, VSR)

e

D

b

SYMBOL MIN NOM MAX

A1.37 1.73

A1 0.10 0.25

b0.20 0.31
c0.19 0.25

D8.56 8.74

E

1

E

E5.82 6.19

E1 3.81 3.98

e 0.635 BSC
h0.28 0.48

L0.41 0.86

L2 0.254 BSC

10º 8º

27º BSC

TOP VIEW

h

2

L

END VIEW

SIDE VIEW



2

A

1

A

c

For current Tape and Re el infor mation, do wnload the P DF fil e fro m:
http://www.catsemi.com/documents/tapeandreel.pdf.

1



L

Notes:

(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-137.

Doc. No. MD-5028 Rev. C 12 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

CAT4016

TQFN 24-Pad 4 x 4mm (HV6)

D

PIN#1 INDEX AREA

(1

A

DETAIL A

E

A1

SIDE VIEWTOP VIEW BOTTOM VIEW

E2

PIN#1 ID

D2

b

e

SYMBOL MIN NOM MAX

L

A 0.70 0.75 0.80
A1 0.00 0.02 0.05
A3 0.20 REF

DETAIL A

b 0.18 0.25 0.30

D 3.90 4.00 4.10
D2 2.40 – 2.90

E 3.90 4.00 4.10
E2 2.40 – 2.90

A

e0.50 BSC

L 0.30 0.40 0.50

FRONT VIEW

A3

)

For current Tape and Re el infor mation, do wnload the P DF fil e fro m:
http://www.catsemi.com/documents/tapeandreel.pdf.

Notes:

(1) All dimensions are in millimeters. Angles in degrees.
(2) Complies with JEDEC MO-220.

© Catalyst Semiconductor, Inc. 13 Doc. No. MD-5028 Rev. C
Characteristics subject to change without notice

CAT4016

,

EXAMPLE OF ORDERING INFORMATION

Prefix

CAT 4016 HV6 – G T2

Optional

Company ID

Device # Suffix

Product Number

4016

Package

W: SOIC
Y: TSSOP
VS: QSOP
VSR: QSOP

HV6: TQFN

(1)

Tape & Reel

T: Tape & Reel
1: 1,000/Reel

000/Reel

2: 2

Lead Finish

Blank: Matte-Tin

(4)

G: NiPdAu

(5)

For Product Top Mark Codes, click here:
http://www.catsemi.com/techsupport/producttopmark.asp

Notes:

(1) All packages are RoHS-compliant (Lead-free, Halogen-free).
(2) The device used in the above example is a CAT4016HV6–GT2 (TQFN, NiPdAu, Tape & Reel, 2,000/Reel).
(3) For additional package and temperature options, please contact your nearest Catalyst Semiconductor Sales office.
(4) Different pin outs, see page 2.
(5) SOIC package availability in 1,000/Reel. All other packages are 2,000/Reel.

Doc. No. MD-5028 Rev. C 14 © Catalyst Semiconductor, Inc.

Characteristics subject to change without notice

REVISION HISTORY

Date Rev. Reason

09/26/2007 A Initial Issue

10/17/2007 B Update Absolute Maximum Ratings

Update Ordering Information table, added TQFN in NiPdAu plated finish.

04/09/2008 C

Copyrights, Trademarks and Patents

© Catalyst Semiconductor, Inc.
Trademarks and registered trademarks of Catalyst Semiconductor include each of the following:

Adaptive Analog™, Beyond Memory™, DPP™, EZDim™, LDD™, MiniPot™, Quad-Mode™ and Quantum Charge Programmable™
Catalyst Semiconductor has been issued U.S. and foreign patents and has patent applications pending that protect its product s.

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PRODUCTS FOR ANY PARTICULAR PURPOSE, NOR THAT THE USE OF ITS PRODUCTS WILL NOT INFRINGE ITS INTELLECTUAL PROPERTY RIGHTS OR
THE RIGHTS OF THIRD PARTIES WITH RESPECT TO ANY PARTICULAR USE OR APPLICATION AND SPECIFICALLY DISCLAIMS ANY AND ALL LIABILITY
ARISING OUT OF ANY SUCH USE OR APPLICATION, INCLUDING BUT NOT LIMITED TO, CONSEQUENTIAL OR INCIDENTAL DAMAGES.

Catalyst Semiconductor products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other
applications intended to support or sustain life, or for any other application in which the failure of the Catalyst Semiconductor product could create a situation where
personal injury or death may occur.

Catalyst Semiconductor reserves the right to make changes to or discontinue any product or service described herein without notice. Products with data sheets labeled
"Advance Information" or "Preliminary" and other products described herein may not be in production or offered for sale.

Catalyst Semiconductor advises customers to obtain the current version of the relevant product information before placing orders. Circuit diagrams illustrate typical
semiconductor applications and may not be complete.

Update Package Outline Drawings
Update Example of Ordering Information
Add Top Mark Codes link

Catalyst Semiconductor, Inc.
Corporate Headquarters
2975 Stender Way
Santa Clara, CA 95054
Phone: [phone] Document No: MD-5028
Fax: [phone] Revision: C
www.catsemi.com Issue date: 04/09/08