CAT4026V-T1 ON Semiconductor, CAT4026V-T1 Datasheet

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CAT4026V-T1

Manufacturer Part Number
CAT4026V-T1
Description
LED Drivers LED DRIVER 6CH CONTROLLER
Manufacturer
ON Semiconductor
Series
-r
Datasheet

Specifications of CAT4026V-T1

Constant Current
Yes
Constant Voltage
-
Topology
PWM
Number Of Outputs
6
Internal Driver
No
Type - Primary
Backlight, General Purpose
Type - Secondary
-
Frequency
-
Voltage - Supply
4.5 V ~ 5.5 V
Voltage - Output
-
Mounting Type
*
Package / Case
*
Operating Temperature
-40°C ~ 85°C
Led Driver Application
Backlighting
No. Of Outputs
6
Output Voltage
1.8V
Input Voltage
4.5V To 5.5V
Dimming Control Type
Analogue / PWM
Operating Temperature Range
-40°C To +85°C
Rohs Compliant
Yes
Lead Free Status / Rohs Status
 Details

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CAT4026
6-Channel LED Controller
with Fault Diagnostics for
Large Panel LED
Backlighting
Description
designed to control six constant current high voltage LED strings.
Added control circuitry monitors the lowest cathode voltage and
generates a feedback control signal to an external Switch Mode Power
Supply (SMPS) to provide a low cost and efficient solution for large
panel high voltage LED backlighting.
sensing an external resistor in series with a low cost bipolar power
transistor. This allows current and heat dissipation concerns to be
mitigated from the CAT4026 device package.
and Shorted−Cathode−Anode (SCA) fault detection circuitry has been
included along with independent Fault flag logic outputs for
diagnostic purposes.
by either a Pulse Width Modulation signal via the PWM input pin or
by an analog dimming voltage applied at the ANLG pin. In addition
the ANLG pin provides a convenient method for limiting the overall
maximum power dissipation in the event of excessive LED shorting
within any LED string.
taking the PWM pin low for an extended length of time.
Features
Typical Applications
© Semiconductor Components Industries, LLC, 2011
May, 2011 − Rev. 5
The CAT4026 is a high performance, large panel LED controller
Each LED channel current is accurately matched and controlled by
For added system reliability, both Open−Cathode−Anode (OCA)
LED current dimming in all six channels can be precisely controlled
The device will automatically enter low current shutdown mode by
Compliant
6 Channel LED Controller
Adaptive Feedback Control to External SMPS for Better Efficiency
PWM and Analog Mode Dimming
Short Cathode−Anode (SCA) Fault Protection
Open Cathode−Anode (OCA) Fault Protection
Over−V oltage Protection
Thermal Shutdown Protection
Automatic Inactivity Power Down Mode
SOIC−28L Package
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS
LCD−TV LED Backlighting
LED General Lighting
1
L
3
A
CAT4026V = Specific Device Code
YY
WW
XXXX
1. Matte Tin Plated Finish (RoHS−compliant)
CAT4026V−T1
(Note 1)
BASE1
RSET1
BASE2
RSET2
BASE3
RSET3
ANLG
Device
PWM
OCA
VDD
N.C.
N.C.
C1
VA
ORDERING INFORMATION
= Assembly Location Code
= Mark “3” for (lead finish Matte−Tin)
= Product Revision: Fixed as “A”
= Production Year (Last Two Digits)
= Production Week (Two Digits)
= Last Four Digits of Assembly Lot Number
MARKING DIAGRAM
PIN CONNECTIONS
http://onsemi.com
CASE 751BM
2
3
4
5
6
7
8
9
10
11
12
13
14
L3A
CAT4026V
YYWWXXXX
(Top View)
V SUFFIX
SOIC−28
1
(Pb−Free)
Package
SOIC−28
Publication Order Number:
28
27
26
25
24
23
22
21
20
19
18
17
16
15
Tape & Reel
Shipping
GND
SCA
VCS
BASE6
RSET6
BASE5
RSET5
BASE4
RSET4
FLT−OCA
C3
FLT−SCA
IFB
VC
1,000/
CAT4026/D

Related parts for CAT4026V-T1

CAT4026V-T1 Summary of contents

Page 1

... CAT4026V YYWWXXXX L = Assembly Location Code 3 = Mark “3” for (lead finish Matte−Tin Product Revision: Fixed as “A” CAT4026V = Specific Device Code YY = Production Year (Last Two Digits Production Week (Two Digits) XXXX = Last Four Digits of Assembly Lot Number ORDERING INFORMATION Device Package CAT4026V− ...

Page 2

... OPEN FLT−OCA PWM PWM ANLG ANLG GND Notes NPN power transistor MJD340 from ON Semiconductor. External power−derating circuit not shown. Table 1. ABSOLUTE MAXIMUM RATINGS Rating VDD Voltage Range PWM, ANLG, FLT−OCA, FLT−SCA Voltage Range RSET[x], BASE[x] Maximum Junction Temperature ...

Page 3

... SCA fault detection threshold sink current SCA fault cleared threshold sink current FLT−SCA pin pull−down voltage FLT−SCA fault delay FLT−SCA open−drain leakage 5. The quiescent current depends on the external bipolar transistors used (ON Semiconductor MJD340) and more specifically of its DC cur- rent gain ( ...

Page 4

Table 4. ELECTRICAL CHARACTERISTICS values T = −40°C to +85°C; unless otherwise noted.) (continued) A Parameter TIMING PWM Enable Time PWM Disable Time Turn−off Shutdown Time, PWM falling to shutdown Channel to channel turn on and turn off delay (staggering) ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS ( PWM 1.4 VIH 1.2 1.0 VIL 0.8 0.6 0.4 0.2 0 −40 − TEMPERATURE (°C) Figure 3. PWM Threshold Voltage vs. Temperature 1.1 1.0 0.9 0.8 0.7 ...

Page 6

TYPICAL PERFORMANCE CHARACTERISTICS ( PWM 1.00 0.99 0.98 0.97 0.96 0.95 4.50 4.75 5.00 VDD VOLTAGE (V) Figure 9. OCA Threshold Voltage vs. Temperature 110 100 90 Dropout Normal 20 Regulation ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS ( PWM Figure 13. LED Current Transient During PWM Dimming Figure 15. Open Cathode−Anode Waveform = 3 25°C unless otherwise specified.) ANLG AMB Figure 14. ANLG Transient, ...

Page 8

Table 5. PIN DESCRIPTION Pin # Name 1 VDD Supply Bias voltage input for controller 2 PWM Digital PWM input control to globally PWM all channels 3 ANLG ANLG input bias signal to globally adjust full scale brightness. (intended for ...

Page 9

Pin Functions VDD The VDD input is the positive supply to the devices. VDD should be nominally 5 V. PWM The PWM control input provides multiple functions. When the first rising edge is applied to PWM input, the CAT4026 will ...

Page 10

External adjustment of LED Anode supply voltage is controlled by the IFB current sink in conjunction with an external feedback circuit. The external circuit should be configured so that 1 mA drive signal will achieve the desired necessary dynamic adjustment ...

Page 11

Simplified Block Diagram ANLG − 100 SHUTDOWN PWM SHORT SCA DETECT + OCA − VCS VDD GND CH−BIAS (1 V−CLAMP) ENABLE TIMER CH−PWM OPEN FAULT DETECT SHORT 4.1 V CATHODE ...

Page 12

APPLICATION INFORMATION Operation with Open and Shorted LED The CAT4026 can detect both open and shorted LED strings through two diode−OR circuits connected respectively to the VCS and SCA pins, as shown in the application circuit in Figure 1. Open ...

Page 13

PIN #1 IDENTIFICATION TOP VIEW D SIDE VIEW Notes: (1) All dimensions are in millimeters. Angles in degrees. (2) Complies with JEDEC MS-013. PACKAGE DIMENSIONS SOIC−28, 300 mils CASE 751BM−01 ISSUE O SYMBOL ...

Page 14

... All packages are RoHS−compliant (Lead−free, Halogen−free). 8. The standard lead finish is Matte Tin. 9. The device used in the above example is a CAT4026V−T1 (SOIC−28L, Matte Tin, Tape & Reel, 1,000/Reel). 10. For additional package and temperature options, please contact your nearest ON Semiconductor Sales office. ...

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