LP3164-QVF POWER [Lowpower Semiconductor inc], LP3164-QVF Datasheet

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LP3164-QVF

Manufacturer Part Number
LP3164-QVF
Description
4-Channel Current Source White LED Driver
Manufacturer
POWER [Lowpower Semiconductor inc]
Datasheet
General Description
The LP3164 is a low-dropout bias supply for white LEDs is
a high-performance alternative to the simple ballast
resistors used in conventional white LED designs. It
supports 4 white LEDs with regulated constant current for
uniform intensity. The LP3164 maintains low dropout
current regulators. The LP3164 requires a 50mV dropout
at a 20mA load on each output to match the LED brightness.
The brightness of LEDs can be tuned through a pulse width
modulated signal at the PWM pin.
The LP3164 is available in a QFN-16 package.
Order Information
Applications
LP3164 – Ver. 1.0 Datasheet
LP3164 -
LCD Panel
Cellular and Smart mobile phone
PDA/DSC
PMP
□ □ □
4-Channel Current Source White LED Driver
Feb.-2008
QV: QFN-16
Package Type
Preliminary Datasheet
F: Pb-Free
Typical Application Circuit
PWM
Features
Marking Information
Please see website.
2.7V to 6V Input Voltage
20mA maxim sink current
PWM tuned LED brightness through PWM
pin(2KHz)
Soft Start Function
Built-in Thermal Protection
I
QFN-16 Package
RoHS Compliant and 100% Lead (Pb)-Free
Q
<1uA in Shutdown
14
15
16
8
1
2
3
4
9
EN
NC
NC
NC
NC
NC
NC
NC
NC
LP3164
PGND
LED1
LED2
LED3
LED4
GND
VIN
Page 1 of 5
7
13
12
11
10
6
5
LP3164
1uF
VBATT

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LP3164-QVF Summary of contents

Page 1

... Current Source White LED Driver General Description The LP3164 is a low-dropout bias supply for white LEDs is a high-performance alternative to the simple ballast resistors used in conventional white LED designs. It supports 4 white LEDs with regulated constant current for uniform intensity. The LP3164 maintains low dropout current regulators ...

Page 2

... VIN 8 EN/PWM 10 LED4 11 LED3 12 LED2 13 LED1 Function Block Diagram LP3164 – Ver. 1.0 Datasheet Feb.-2008 Preliminary Datasheet LED1 DESCRIPTION NC No Internal Connection. Power Supply. Chip Enable(active High).and connects to a GPIO of MCU,the GPIO supply a PWM singal dimming method to control the brightness(0-20mA) of white LEDs and the PWM frequency from 200Hz to 10KHz,the duty from 0% to 100% ...

Page 3

... I Q Shutdown Current I SHDN LED Current Accuracy I LED-ERR LED Channel Matching I LED-LED-ERR Enable Threshold Low V EN(L) V Enable Threshold High EN(H) LP3164 – Ver. 1.0 Datasheet Feb.-2008 Preliminary Datasheet V ---------------------------------------------------------------------------- 6V INA, INB) ) ---------------------------------------------------------- 0. en/LED ) ---------------------------------------------------- QFN-16 ---------------------------------------------------------------- 1.5W D ------------------------------------------------------------------------------------50 Conditions No Load,1X mode ENB = GND 3mA< I 30mA LED< ...

Page 4

... Typical Operating Characteristics LP3164 – Ver. 1.0 Datasheet Feb.-2008 Preliminary Datasheet LP3164 Page ...

Page 5

... Packaging Information LP3164 – Ver. 1.0 Datasheet Feb.-2008 Preliminary Datasheet LP3164 Page ...

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