ncp5623b ON Semiconductor, ncp5623b Datasheet - Page 3

• Manufacturer Part Number: ncp5623b
• Description: Triple Output I2c Controlled Rgb Led Driver
• Manufacturer: ON Semiconductor

1. Using low ESR ceramic capacitor, X5R type, is mandatory to optimize the Charge Pump efficiency and to reduce the EMI.
2. The peak current is 37 mA for each LED, the total charge pump output DC current being limited to 75 mA
PIN ASSIGNMENT
PIN
10
11
12
1
2
3
4
5
6
7
8
9
AGND
VOUT
Name
LED3
LED2
LED1
VBAT
GND
SDA
C1N
C1P
I
SCL
REF
GROUND
OUTPUT,
ANALOG
ANALOG
DIGITAL
DIGITAL
POWER
POWER
POWER
POWER
POWER
POWER
POWER
POWER
INPUT,
INPUT,
INPUT,
INPUT,
INPUT,
INPUT,
INPUT,
Type
One side of the external charge pump capacitor (C
pin 12 (Note 1).
This pin is the GROUND signal for the analog and digital blocks and must be connected to the system
ground. This pin is the GROUND reference for the DC/DC converter and the output current control.
The pin must be connected to the system ground, a ground plane being strongly recommended.
This pin sinks to ground and monitors the current flowing into the LED3, intended to be used in illu-
mination application (Note 2). The Anode of the associated LED shall be connected to the Vout pin.
This pin sinks to ground and monitors the current flowing into the LED2, intended to be used in illu-
mination application (Note 2). The Anode of the associated LED shall be connected to the Vout pin.
This pin sinks to ground and monitors the current flowing into the LED1, intended to be used in illu-
mination application (Note 2).
This pin copies the Analog Ground and must be connected to the system ground plane.
This pin carries the data provided by the I2C protocol. The content of the SDA byte is used to pro-
gram the mode of operation and to set up the output current (Note 1).
This pin provides the reference current, based on the internal band−gap voltage reference, to control
the output current flowing in the LED. A 1% tolerance, or better, resistor shall be used to get the
highest accuracy of the LED biases. An external current mirror can be used to bias this pin to dynam-
ically set up the I−LED peak current.
In no case shall the voltage at I
the internal reference.
This pin carries the I2C clock to control the Charge Pump converter and to set up the output current.
The SCL clock is associated with the SDA signal.
This pin provides the output voltage supplied by the Charge Pump converter. The Vout pin must be
bypassed by 1 mF ceramic capacitor located as close as possible to the V
the output voltage to ground. The circuit shall not operate without such bypass capacitor connected
across the Vout pin and Ground (Note 1).
The output voltage is internally clamped to 5.5 V maximum in the event of a no load situation. On the
other hand, the output current is limited to 40 mA (typical) in the event of a short circuit to ground.
This pin is the input Battery voltage to supply the analog and digital blocks. The pin must be de-
coupled to ground by a 1mF or higher ceramic capacitor (Note 1).
One side of the external charge pump capacitor (C
pin 1 (Note 1)
http://onsemi.com
REF
3
pin be forced either higher or lower than the 600 mV provided by
Description
FLY
FLY
) is connected to this pin, associated with C1N,
) is connected to this pin, associated with C1P,
OUT
pin to properly bypass