NCP1840Q8A6MNG ON Semiconductor, NCP1840Q8A6MNG Datasheet

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NCP1840Q8A6MNG

Manufacturer Part Number
NCP1840Q8A6MNG
Description
LED Lighting Drivers PRGRM MULTI LED DRIVER
Manufacturer
ON Semiconductor
Datasheet

Specifications of NCP1840Q8A6MNG

Product Category
LED Lighting Drivers
Rohs
yes
Input Voltage
3 V to 5.5 V
Operating Frequency
400 kHz
Maximum Supply Current
0.75 mA
Output Current
30 mA
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
QFN-20
Minimum Operating Temperature
- 40 C

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Manufacturer
Quantity
Price
Part Number:
NCP1840Q8A6MNG
Manufacturer:
ON Semiconductor
Quantity:
82
NCP1840
8-Channel Programmable
LED Driver
programmability of eight separate LED channels through a simple I
serial communication interface. The current through each of the
channels can be up to 30 mA and is controlled via constant current
regulation. Each channel has programmable Pulse−Width Modulation
(PWM) control along with programmable current control, allowing
for very flexible, optimized LED brightness and color control.
Logarithmic output current levels are achieved to best accommodate
natural eye viewing.
LEDs and/or multiple LEDs in series per channel to be driven with a
low−voltage supply. This makes the NCP1840 capable of efficiently
driving LEDs in applications that are running off of low−voltage
processor supply levels along with battery−powered applications. Few
external components are required making this a very cost−effective
solution for multi−channel LED driving.
Features
Typical Applications
© Semiconductor Components Industries, LLC, 2013
February, 2013 − Rev. 3
The NCP1840 is a general purpose LED driver that allows for full
A QUAD−MODE® charge pump allows for higher forward voltage
Status or Diagnostic Indicators
Decorative Lighting
Individual Current Level Programmability (5−bit) per Channel
Individual PWM Programmability (6−bit) per Channel
I
Constant Current Regulated Outputs − 30 mA Maximum per Channel
Logarithmic Output Current Levels
External Resistor for Setting Full−Scale Current for all Channels
Low Noise QUAD−MODE Charge Pump Delivers > 90% Efficiency
High LED Forward−Voltage Compliant − up to 4.1 V
Soft−Start POR Reduces Noise
Registers are Write/Read
Fault and Thermal Protection
Small QFN Package
These are Pb−Free Devices
2
C Serial Communication Interface for Programming
Equipment Testers, etc.)
Portables (Notebook Battery Monitors, Handheld
Computing (Servers, Workstations, etc.)
Electronic Payment Systems
Toys and Gaming − “Fun Lighting”
1
2
Small−Format Display Drivers
“True Green” LED Applications
C
Electronic Musical Instruments
Aftermarket Automotive Trim
Keypad Lighting
Tablet PCs and PDAs
Smart Phones
†For information on tape and reel specifications,
NCP1840Q8A6MNG
NCP1840Q8A6MNTWG
including part orientation and tape sizes, please
refer to our Tape and Reel Packaging Specifications
Brochure, BRD8011/D.
(*Note: Microdot may be in either location)
NCP1840 = Specific Device Code
A
L
Y
W
G
Device
ORDERING INFORMATION
= Assembly Location
= Wafer Lot
= Year
= Work Week
= Pb−Free Package
http://onsemi.com
CASE 485E
4 x 4 mm
QFN20
Publication Order Number:
(Pb−Free)
(Pb−Free)
Package
QFN20
QFN20
1
MARKING
DIAGRAM
20
2500 / Tape &
Shipping
490 / Tray
NCP1840/D
ALYWG
1840
NCP
Reel
G

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NCP1840Q8A6MNG Summary of contents

Page 1

... Work Week G = Pb−Free Package (*Note: Microdot may be in either location) ORDERING INFORMATION Device NCP1840Q8A6MNG NCP1840Q8A6MNTWG †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. Electronic Musical Instruments ♦ ...

Page 2

CPO LED1 LED2 LED3 LED4 C1+ C1− C2+ V BAT V BAT C BAT 2 BIAS R BIAS 10. SCL / SDA GND 1 mF Figure ...

Page 3

Pin 10− R Bandgap & Bias BIAS Control Logic Pin 8− SCL Logic Serial Pin 9− SDA Pin 7− Pin 6− GND Pin 15− GND PIN DESCRIPTION Pin Name 1 CPO 2−5, 11−14 LED1 − LED8 6, 15, ...

Page 4

ABSOLUTE MAXIMUM RATINGS Rating Battery Supply Voltage Range Digital Supply Voltage Range Charge Pump Output Voltage Range LED Outputs Voltage Range SCL Voltage Range SDA Voltage Range Thermal Resistance, Junction−to−Air (Note 1) Storage Temperature Range Lead Temperature, Soldering (Note 2) ...

Page 5

OPERATING RANGES Rating Battery Supply Voltage Digital Supply Voltage Ground LED Forward Voltage (Note 4) R External Resistor BIAS Ambient Temperature Junction Temperature 4. At full PWM, max current level. ELECTRICAL CHARACTERISTICS Parameter Digital Supply Current (Note 5) Digital Supply ...

Page 6

I C TIMING CHARACTERISTICS (T J Parameter SCL Clock Frequency SCL Low Time SCL High Time Start Hold Time Data Hold Time Start Setup Time Data Setup Time Stop Setup Time Bus Free Time (Stop and Start Conditions) Rise ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS I = 160 mA (8 LEDs at 20 mA/ch), C OUT 3 −2 −4 −6 2.0 2.5 3.0 3.5 4.0 VBAT VOLTAGE (V) Figure 6. LED Current Change vs. ...

Page 8

Constant Current Control The NCP1840 has 8 LED channels that are individually regulated constant current sources. The maximum current per channel but can be reduced by adjusting the resistor R , which is placed between the R ...

Page 9

Register Writes & Reads The ability of the NCP1840 to allow the internal registers to be both written and read provides the user with the benefit of being able to easily verify correct register writes and isolate system problem areas ...

Page 10

Control Bits The NCP1840 has 3 control bits that are used to dictate the function that will be performed by the part. The following CONTROL BITS DESCRIPTION CB2 CB1 CB0 Turn all LED Channels ON/OFF All channels ...

Page 11

REGISTER ADDRESS MAP Address − Binary ...

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CURRENT LEVEL REGISTER DESCRIPTION Data − Binary ...

Page 13

PWM REGISTER DESCRIPTION Data − Binary ...

Page 14

Output Control Register The Output Control Register on the NCP1840 is used to set the status, either ON or OFF, of all 8 channels. As shown in the following table, each bit in the register corresponds to one of the ...

Page 15

Soft Start−Up The NCP1840 has an on−chip power−on−reset (POR) circuitry that is used to provide soft start−up. As the supply voltage is applied, the POR will sense when the voltage reaches a level that will allow all circuitry to operate ...

Page 16

Step 4a. Set LEDs and immediately activate the change with settings loaded in Steps 1−3. 4a.1 Set the Part Address to 1B (hex). 4a.2 Set the Read/Write bit to 0. 4a.3 Set ...

Page 17

Step 6. Read back the LED1 PWM Register value. 6.1 Set the part address to 1B (hex). 6.2 Set the Read/Write bit to 0. 6.3 Set the Controls Bits to 001 in order to perform a Read operation. 6.4 Set ...

Page 18

Use good−quality X5R or X7R ceramic capacitors for C Figure 16. Schematic Showing Charge Pump and Decoupling Capacitors 5. Charge pump capacitors possible − see Figure 17. Figure 17 ...

Page 19

... NOTE 3 OUTLINE 20X 0.35 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. N. American Technical Support: 800−282−9855 Toll Free USA/Canada Europe, Middle East and Africa Technical Support: Phone: 421 33 790 2910 Japan Customer Focus Center Phone: 81− ...

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