datasheetbank_Logo
búsqueda de Hoja de datos y gratuito Fichas de descarga

P/N + Descripción + Búsqueda de contenido

Consulta
componentes Descripción : High-Efficiency, 36V Step-Up Converters with TA Derating Option for 2 to 9 White LEDs

General Description
The MAX8595X/MAX8596X drive up to nine White LEDs with constant current and high efficiency to provide LCD backlighting in cell phones, PDAs, and other handheld devices. The series connection allows the LED currents to be identical for uniform brightness and minimizes the number of traces to the LEDs. The MAX8595X regulates constant LED current over the entire temperature range. The MAX8596X features an ambient-temperature Derating function to avoid overdriving the White LEDs during high ambient temperatures, enabling higher drive current below +42°C.

Features
♦ Up to Nine LEDs at 25mA
♦ Temperature Derating Function to Allow Fewer LEDs for Same Light (MAX8596X)
♦ 86% Efficiency (PLEDs / PIN)
♦ 1.7% Current-Regulation Accuracy
♦ Output Overvoltage Protection
♦ Flexible Dimming Control
   Analog
   Direct-PWM Internal Filter
♦ 1MHz PWM Switching Frequency
♦ 0.1µF Output Capacitor
♦ 12mVP-P Low Input Ripple
♦ Soft-Start Eliminates Inrush Current
♦ 2.6V to 5.5V Input Range
♦ 0.3µA Shutdown Current
♦ Pin Compatible with the MAX1561 and MAX1599
♦ TDFN 3mm x 3mm x 0.8mm Package with Exposed Paddle

Applications
   Cell Phones and Smart Phones
   PDAs, Palmtops, and Wireless Handhelds
   e-Books and Subnotebooks
   White LED Display Backlighting

MaximIC
Maxim Integrated
componentes Descripción : High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs

General Description
The MAX1561/MAX1599 Step-Up Converters drive up to six White LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The Step-Up converter topology allows series connection of the White LEDs so the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration.

Features
♦ Accurate Current Regulation for Uniform Illumination
♦ High Efficiency Up to 87%
♦ Flexible Analog or PWM Dimming Control
♦ Up to 900mW Output Power with Internal 30V MOSFET Switch
♦ Fast 1MHz (MAX1561) or 500kHz (MAX1599) PWM Operation
♦ Small, Low-Profile External Components
♦ 2.6V to 5.5V Input Range
♦ 26V (max) Output with Overvoltage Protection
♦ Optimized for Low 15mVP-P Input Ripple
♦ Soft-Start with Zero Inrush Current
♦ 0.3µA Shutdown Current
♦ Tiny 8-Pin 3mm x 3mm Thin DFN Package

Applications
    Cell Phones and Smart Phones
    PDAs, Palmtops, and Wireless Handhelds
    e-Books and Subnotebooks
    White LED Display Backlighting

Número de pieza(s) : EUP2561 EUP2561JIR1 EUP2561JIR0
EUTECH
Eutech Microelectronics Inc
componentes Descripción : 26V Step-Up Converters for Two to Six White LEDs

DESCRIPTION
The EUP2561 is a constant current Step-Up converter specially designed for driving White LEDs. The Step-Up converter topology allows series connection of the White LEDs so the LED currents are identical for uniform brightness. The EUP2561 can drive 6 LEDs in series. The brightness of the LEDs can be adjusted through a voltage level on the CTRL pin or by applying a PWM signal to CRTL pin.

FEATURES
● 2.6V to 5.5V Input Range
● 26V (max) Output with Overvoltage Protection
● Up to 87% Efficiency
● Flexible Analog or PWM Dimming Control
● Internal High Power 30V MOSFET Switch
● < 1µA shutdown Current
● Fast 1MHz PWM Operation
● Small, Low-Profile Inductors and Capacitors
● 3mm× 3mm DFN-8 Package
● RoHS Compliant and 100% Lead (Pb)-Free

APPLICATIONS
● Cell Phones and Smart Phones
● PDAs, Palmtops, and Wireless Handhelds
● e-Books and Subnotebooks
White LED Display Backlighting

Número de pieza(s) : LTC1876 LTC1876EG
Linear
Linear Technology
componentes Descripción : High Efficiency, 2-Phase, Dual Synchronous Step-Down Switching Controller and Step-Up Regulator

DESCRIPTION
The LTC®1876 is a high performance triple output switching regulator. It incorporates a dual step-down switching controller that drives all N-channelsynchronous power MOSFET stages. A Step-Up regulator with an internal 1A, 36V switch provides the third output.

FEATURES
Step-Down Controller
■ Out-of-Phase Controllers Reduce Required Input Capacitance and Power Supply Induced Noise
■ Power Good Output Voltage Indicator
■ OPTI-LOOPTM Compensation Minimizes COUT
■ DC Programmed Fixed Frequency 150kHz to 300kHz
■ Wide VIN Range: 3.5V to 36V Operation
■ Very Low Dropout Operation: 99% Duty Cycle
■ Adjustable Soft-Start Current Ramping
■ Latched Short-Circuit Shutdown with Defeat Option
■ Remote Output Voltage Sense and OV Protection
■ 5V and 3.3V Standby Regulators
■ Selectable Const. Freq. or Burst ModeTM Operation

Step-Up Regulator
■ High Operating Switching Frequency of 1.2MHz
■ Low Internal VCESAT Switch: 400mV @ 1A, VIN = 3V
■ Wide VIN Range: 2.6V to 16V Operation
■ High Output Voltage: Up to 34V

APPLICATIONS
■ 3.3V Input Step-Down Converter
■ Notebook and Palmtop Computers, PDAs
■ Battery-Operated Digital Devices

 

Número de pieza(s) : NJU6050
JRC
Japan Radio Corporation
componentes Descripción : High Efficiency White LED Driver

GENERAL DESCRIPTION
The NJU6050 is a high-efficiency White LED driver. It contains a high-efficiency Step-Up DC/DC converter and an output driver. The IC ensures a 28V maximum capacity which allows series connection of 8 White LEDs with a constant current so that the LED currents are identical for uniform brightness.
The high frequency of the Step-Up converter permits the use of small, low-profile inductors and capacitors to minimize the footprint in space-conscious applications. And additional features are a low operating voltage of 2.5V and the small package SOT-23 (MTP-5).
All of these benefits make the NJU6050 suitable for the battery-powered portable applications such as a cellular phone, a camcorder, PDA, etc.

FEATURES
● Drives Up to 8 White LEDs in Series
                           VSW = 28V, IOUT = 20mA
● Uses Small Inductor and Capacitors
● 2.5V to 6.5V Operating Voltage for Step-Up Circuits (VDD)
● CMOS Technology
● Package           : SOT-23 5 pin (MTP-5)

MPS
Monolithic Power Systems
componentes Descripción : High-Efficiency, Fast-Transient, 5A, 36V Synchronous, Step-Down Converter AEC-Q100 Qualified

DESCRIPTION
The MPQ4470/4470A is a fully-integrated, high frequency, synchronous, rectified, step-down, switch-mode converter. It offers a very compact solution to achieve a 5A, continuous-output
current over a wide input-supply range with excellent load and line regulation. It also provides fast transient response and good stability for wide input-supply and load range. The MPQ4470/4470A operates at high efficiency over a wide output current load range.

FEATURES
• Wide 4.5V-to-36V Operating Input Range
• Guaranteed 5A, Continuous Output Current
•Internal 40mΩHigh-Side, 20mΩ Low-Side Power MOSFETs
•Proprietary Switching-Loss-Reduction Technology
• 1% Reference Voltage
• Programmable Soft-Start Time
• Low Drop-out Mode
• 200kHz-to-1MHz Switching Frequency
• SCP, OCP, OVP Latch (MPQ4470 only), UVP, and Thermal Shutdown
• Output Adjustable from 0.8V to 0.9×VIN
• Available in a 3mm×4mm 20-pin QFN Package
• Available in AEC-Q100 Grade 1

Número de pieza(s) : NJU6048 NJU6048F
JRC
Japan Radio Corporation
componentes Descripción : High Efficiency White LED Driver

GENERAL DESCRIPTION
The NJU6048 is a high-efficiency White LED driver. It contains a high-efficiency Step-Up DC/DC converter and an output driver. The IC can output max.18V and drive as many as 4 White LEDs in series with a constant current, which guarantees the LEDs with uniform brightness.
The high frequency of the Step-Up converter permits the use of small, low-profile inductors and capacitors to minimize the footprint in space-conscious applications. The NJU6048 also features low operating voltage of 1.7V and the small package SOT-23 (MTP-5).
All of these benefits make the NJU6048 suitable for the battery-powered portable applications such as cellular phones, camcorders, PDAs, etc.

FEATURES
● Drives Up to 4White LEDs in Series
                            IOUT = 20mA(typical)
● Uses Small Inductor and Capacitors
● 1.7V to 6.5V Operating Voltage for Step-Up Circuits (VDD)
● Low Switch RDS (ON)
                            VSW = 18V, RDS=0.8Ω (ISW=150mA)
● OVP Function
● CMOS Technology
● Package          : SOT-23 5 pin (MTP-5)

Anpec
Anpec Electronics
componentes Descripción : 1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs

General Description
The APW7136A/B/C is a current-mode and fixed frequency boost converter with an integrated N-FET to drive up to 8 White LEDs in series.
The series connection allows the LED current to be identical for uniform brightness. Its low on-resistance of N-FET and feedback voltage reduce power loss and achieve high efficiency. Fast 1MHz current-mode PWM operation is available for input and output capacitors and a small inductor while minimizing ripple on the input supply. The OVP pin monitors the output voltage and stops switching if exceeds the over-voltage threshold. An internal softstart circuit eliminates the inrush current during start-up.

Features
• Wide Input Voltage from 2.7V to 6V
• 0.25V Reference Voltage
• Fixed 1MHz Switching Frequency
• High Efficiency up to 87%
• 100Hz to 100kHz PWM Brightness Control Frequency
• Open-LED Protection
• Under-Voltage Lockout Protection
• Over-Temperature Protection
• <1μA Quiescent Current Dduring Shutdown
• SOT-23-6 Packages
• Lead Free and Green Devices Available (RoHS Compliant)

Applications
White LED Display Backlighting
• Cell Phone and Smart Phone
• PDA, PMP, MP3
• Digital Camera

Diodes
Diodes Incorporated.
componentes Descripción : HIGH EFFICIENCY LOW EMI WIDE ANALOG DIMMING RANGE 36V 1A/1.3A BUCK LED DRIVER

Description
The AL8807A is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 9 White high brightness LEDs in series from a voltage source of 6V to 36V.

Features
• LED Driving Current up to 1A/1.3A
• Better than 5% Accuracy
• High Efficiency Up to 96%
• Optimally Controlled Switching Speeds
• Operating Input Voltage from 6V to 36V
• Wide Analog Input Range for Dimming Control (>10:1)
• Built-in Protection Features:
   ◾ Open-Circuit LED protection
   ◾ LED Chain Short Circuited
   ◾ Over-Temperature Protection
• MSOP-8EP and SOT25: Available in “Green” Molding Compound
   (No Br, Sb) with lead Free Finish/ RoHS Compliant
   ◾ Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
   ◾ Halogen and Antimony Free. “Green” Device (Note 3)

Applications
• General Illumination Lamps
• 12V Powered LED Lamps
• Wide Analog Dimming Range LED Lamps

Número de pieza(s) : AL8806
Diodes
Diodes Incorporated.
componentes Descripción : HIGH EFFICIENCY 36V 1.5A BUCK LED DRIVER

The AL8806 is a step-down DC/DC converter designed to drive LEDs with a constant current. The device can drive up to 8 LEDs, depending on the forward voltage of the LEDs, in series from a voltage source of 6V to 36V. The AL8806 switches at frequencies up to 1MHz. This allows the use of small size external components, hence minimizing the PCB area needed.

Maximum output current of AL8806 is set via an external resistor connected between the VIN and SET input pins. Dimming is achieved by applying either a DC voltage or a PWM signal at the CTRL input pin. An input voltage of 0.4V or lower at CTRL switches off the output MOSFET simplifying PWM dimming.

12345678910 Next

All Rights Reserved© datasheetbank.com [ Política De Privacidad ]