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Product Variant Information section
Product Specification Section
Pricing Section

Stock: 45,000

On Order:Order inventroy details 12,000
Factory Stock:Factory Stock: 0
Factory Lead Time: 10 Weeks
Minimum Order: 3,000
Multiple Of: 3,000
Quantity Web Price
3,000+ $0.415


Attributes Table
Supply Voltage 2.8V to 5.5V
Output Current per Channel 20mA
Output Voltage 22V
Switching Frequency-Max 1.3MHz
Features and Applications

The CAT4139 is a 22 V High Current Boost White LED Driver.

The CAT4139 is a DC/DC step-up converter that delivers an accurate constant current ideal for driving LEDs. Operation at a fixed switching frequency of 1MHz allows the device to be used with small value external ceramic capacitors and inductor. LEDs connected in series are driven with a regulated current set by the external resistor R1. The CAT4139 is ideal for driving parallel strings of up to five white LEDs in series or up to 22V. LED dimming can be done by using a DC voltage, a logic signal, or a pulse width modulation (PWM) signal. The shutdown input pin allows the device to be placed in power-down mode with 'zero' quiescent current. In addition to thermal protection and overload current limiting, the device also enters a very low power operating mode during 'Open LED' fault conditions. The device is housed in a low profile (1mm max height) 5-lead TSOT-23 package for space critical applications.

Key Features:

  • Switch Current Limit 750 mA
  • Drives LED Strings up to 22 V
  • Up to 87% Efficiency
  • Low Quiescent Ground Current 0.6 mA
  • 1 MHz Fixed Frequency Low Noise Operation
  • Soft Start “In−rush” Current Limiting
  • Shutdown Current Less than 1 A
  • Open LED Overvoltage Protection
  • Automatic Shutdown at 1.9 V (UVLO)
  • Thermal Overload Protection
  • TSOT−23 5−Lead (1 mm Max Height)
  • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant


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