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MAX1554

Features: Constant-Current Regulation for Even LED IlluminationInternal 40V MOSFET Switch Capable of Driving 10 LEDsSmall, Low-Profile External Components2.7V to 5.5V Input RangeUp to 88% Efficiency Driving 6 LEDsUp to 82% Efficiency Driving 9 LEDs (20mA, VCC = 3.6V)Analog or PWM Control of LED In...

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SeekIC No. : 004409029 Detail

MAX1554: Features: Constant-Current Regulation for Even LED IlluminationInternal 40V MOSFET Switch Capable of Driving 10 LEDsSmall, Low-Profile External Components2.7V to 5.5V Input RangeUp to 88% Efficiency...

MAX1554 Data Sheet

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Part Number:
MAX1554
Supply Ability:
5000

Price Break

  • Qty
  • 1~5000
  • Unit Price
  • Negotiable
  • Processing time
  • 15 Days
Total Cost: $ 0.00

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Upload time: 2024/11/27

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Product Details

Description



Features:

Constant-Current Regulation for Even LED Illumination
Internal 40V MOSFET Switch Capable of Driving 10 LEDs
Small, Low-Profile External Components
2.7V to 5.5V Input Range
Up to 88% Efficiency Driving 6 LEDs
Up to 82% Efficiency Driving 9 LEDs (20mA, VCC = 3.6V)
Analog or PWM Control of LED Intensity
Optimized for Low Input Ripple
Soft-Start to Minimize Inrush Current
3mm x 3mm 8-Pin TDFN Package


Application

Cellular Phones
PDA, Palmtop, and Wireless Handhelds
Color Display Backlight


Pinout

Connection Diagram


Specifications

VCC, FB, OV to GND..............................................-0.3V to +6.0V
LX to GND ............................................................-0.3V to +45V
EN, BRT, SS to GND....................................-0.3V to (VCC + 0.3V)
ILX ................................................................................0.9ARMS
Continuous Power Dissipation (TA = +70°C)
  8-Pin 3mm x 3mm TDFN
  (derate 24.4mW/°C above +70°C) .............................1951mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature......................................................+150°C
Storage Temperature Range ............................-65°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C


Description

The MAX1553/MAX1554 drive white LEDs in series with a constant current to provide efficient display backlighting in cellular phones, PDAs, and other hand-held devices. The step-up converter includes an internal 40V, low RDSON, N-channel MOSFET switch for high efficiency and maximum battery life. The MAX1553 has a current limit of 480mA for driving two to six white LEDs, while the MAX1554 has a current limit of 970mA for driving up to 10 white LEDs.

A single analog/PWM Dual Mode™ input provides two simple means of brightness adjustment. A separate enable input provides on/off control. Soft-start minimizes inrush current during startup.

The MAX1553/MAX1554 are available in space-saving 8-pin TDFN 3mm x 3mm packages.




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