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Description

The ZXSC300 is a single or multi cell LED driver designed for applications where step-up voltage conversion from very low input voltages is required. These applications mainly operate from single 1.5V or 1.2V battery cells. The circuit generates constant current pulses that are ideal for driving single or multiple LEDs over a wide range of operating voltages. The ZXSC300 is a PFM controller IC that drives an external Zetex switching transistor with a very low saturation resistance. These transistors are the best switching devices available for this type of switching conversion enabling high efficiency conversion with input voltages below 1V. The drive output of the ZXSC controller generates a dynamic drive signal for the switching transistor. The circuit can start up under full load and operates down to an input voltage of 0.8 volts. The solution configuration ensures optimum efficiency over a wide range of load currents, several circuit configurations are possible depending on battery life versus brightness considerations. The ZXSC300 is offered in the SOT25 package which, when combined with a SOT23 switching transistor, generates a high efficiency small size circuit solution. The IC and discrete combination offers the ultimate cost vs performance solution for single cell LED driving applications.

Application(s)

  • LED flashlights and torches
  • LED backlights
  • White LED driving
  • Multiple LED driving
  • Solar Equipment

Feature(s)

  • 94% efficiency
  • Minimum operating input voltage 0.8V
  • Fixed output current
  • Low saturation voltage switching transistor
  • SOT25 package

Product Specifications

Product Parameters

Topology Boost
MinimumInput Voltage 0.8 V
MaximumInput Voltage 8 V
Maximum Output Voltage Ext BJT V
LED Current Ext BJT A
Switching Frequency 200 kHz
Efficiency 94 %
OperatingTemperatureRange -40 to 85 °C
Quiescent Current Typ 0.2 mA

Related Content

Quality Documentation

Technical Documents

Application Notes

Design tool model software

ICP Reports

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Orderable Part Number Buy from Distributor / Contact Sales Request Samples
ZXSC300E5TA

ZXSC300E5TA

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics 2747 4/22/2021 United States Buy Now
Arrow Electronics Central EU 3000 4/22/2021 Europe Buy Now
Avnet 15000 4/22/2021 United States Buy Now
Digi-Key Electronics 3990 4/22/2021 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 6990 4/22/2021 South America, North America, Asia, Europe, Middle East Buy Now
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