NCP1840Q8A6MNTWG ON Semiconductor, NCP1840Q8A6MNTWG Datasheet - Page 3
NCP1840Q8A6MNTWG
Manufacturer Part Number
NCP1840Q8A6MNTWG
Description
LED Lighting Drivers PRGRM MULTI LED DRIVER
Manufacturer
ON Semiconductor
Datasheet
1.NCP1840Q8A6MNTWG.pdf
(19 pages)
Specifications of NCP1840Q8A6MNTWG
Rohs
yes
PIN DESCRIPTION
16, 17, 19, 20
2−5, 11−14
6, 15, 21
Pin
10
18
1
7
8
9
Pin 10− R
Pin 15− GND
Pin 7− DV
Pin 9− SDA
Pin 6− GND
Pin 8− SCL
C2−, C1−, C2+,
LED1 − LED8
Name
DV
R
CPO
GND
V
SDA
BIAS
SCL
C1+
BIAS
BAT
CC
CC
Bandgap & Bias
Logic Serial
Control Logic
Interface
Oscillator
Charge pump output used as power supply to the LEDs. Should have a 2.2 mF ceramic
capacitor (X5R or X7R) connected to ground.
Current sink outputs for driving LEDs. Output current level and PWM duty cycle can be
programmed through the I
Ground connection (Pin 21 is the exposed paddle and should be connected to ground)
Supply input for digital circuitry. Should have a 1 mF ceramic capacitor (X5R or X7R)
connected to ground.
I
I
An external resistor connected to ground defines the full−scale current for the LED outputs.
Charge pump flying capacitor connections. A 1 mF ceramic capacitor (X5R or X7R) should be
connected from C1+ to C1− and C2+ to C2−.
Supply input for the charge pump and analog circuitry. Should have a 2.2 mF low ESR
ceramic capacitor connected to ground.
Registers
Generator
2
2
C clock input
C serial data input/output
Over Temp Detect
Figure 3. NCP1840 Block Diagram
POR
http://onsemi.com
3
2
C interface.
Charge Pump
Output DAC
Output DAC
Output DAC
Output DAC
Output DAC
Output DAC
Output DAC
Output DAC
Function
Pin 1− CPO
Pin 2− LED1
Pin 3− LED2
Pin 4− LED3
Pin 5− LED4
Pin 11− LED5
Pin 12− LED6
Pin 13− LED7
Pin 14− LED8