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FAN5607HMPX Datasheet

  • FAN5607HMPX

  • LED Driver with Adaptive Charge Pump DC/DC Converter

  • 13頁(yè)

  • FAIRCHILD

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www.fairchildsemi.com
FAN5607
LED Driver with Adaptive Charge Pump DC/DC
Converter
Features
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Parallel LED Driver Supports all Forward Voltages
Adaptive V
OUT
Adjustment to the Highest Diode Voltage
Internally Matched LED Current Sources
Built-in Charge Pump has Three Modes of Operation:
鈥?1X, 1.5X, and 2X Mode
Up to 93% Ef鏗乧iency
Low EMI, Low Ripple
Up to 120mA Output Current ( 4
脳
30
mA )
External Resistor to Set Maximum (100%) LED Current
Enable Input Can be Duty-Cycle-Modulated to Control
LED Current Level Between 0 and 100%
2.4V to 5.5V Input Voltage Range
I
CC
< 1碌A(chǔ) in Shutdown Mode
1MHz Operating Frequency
Shutdown Isolates Output from Input
Soft-Start Limits Inrush Current
Short Circuit Protection
Minimal External Components Needed
Available in a 4x4mm 16-lead MLP Package
Description
The FAN5607 generates regulated output current from a bat-
tery with input voltage varying between 2.7V to 5.5V.
Switch recon鏗乬uration and fractional switching techniques
are utilized to achieve high ef鏗乧iency over the entire input
voltage range. A proprietary internal circuitry continuously
monitors each LED current loop and automatically adjusts
the generated output DC voltage to the lowest minimum
value required by the LED having the highest forward volt-
age. This adaptive nature of the FAN5607 eliminates the
need for LED pre-selection (matching) and ensures opera-
tion at high ef鏗乧iency. When the input voltage is suf鏗乧iently
high to sustain the programmed current level in the LEDs,
the FAN5607 re-con鏗乬ures itself to operate as a linear regu-
lator, and the DC-DC converter is turned off. Only two 0.1碌F
to 1碌F bucket capacitors and two 4.7碌F input/output capaci-
tors are needed for proper operation. LED current can be
programmed using an external resistor. The resistor sets the
maximum LED current and a PWM signal applied to the
enable pin can modulate that current level between 0mA
(off) and the maximum level.
Soft-start circuitry prevents excessive current draw during
power on. The device has built-in short circuit protection.
The device is available in 4x4mm 16-lead MLP package.
Applications
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Cell Phones
Handheld Computers
PDA, DSC, MP3 Players
Keyboard Backlight
LED Displays
Typical Application
V
OUT
C
OUT
V
IN
C
IN
V
OUT
V
IN
EN
R
SET
R
SET
LED-
LED-
LED-
LED-
CAP-
CAP2
CAP+
CAP+
CAP1
FAN5607
GND
CAP-
REV. 1.0.0 6/22/04

FAN5607HMPX 產(chǎn)品屬性

  • 3,000

  • 集成電路 (IC)

  • PMIC - LED 驅(qū)動(dòng)器

  • -

  • -

  • -

  • 4

  • 是

  • 背光

  • 白色 LED

  • 800kHz ~ 1.2MHz

  • 2.4 V ~ 5.5 V

  • 3.62V

  • 表面貼裝

  • 16-MLP

  • 16-MLP

  • 帶卷 (TR)

  • -40°C ~ 85°C

  • FAN5607HMPXTRFAN5607HMPX_NLFAN5607HMPX_NLTRFAN5607HMPX_NLTR-ND

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