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ZXLD1350

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Description

The ZXLD1350 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 7V and 30V and provides an externally adjustable output current of up to 350mA. Depending upon supply voltage and external components, this can provide up to 8 watts of output power. The ZXLD1350 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Output current can be adjusted above, or below the set value, by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. Depending upon the control frequency, this will provide either a continuous or a gated output current. The PWM filter components are contained within the chip. The PWM filter provides a soft-start feature by controlling the rise of input/output current. The soft-start time can be increased using an external capacitor from the ADJ pin to ground. Applying a voltage of 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state. The device is assembled in a TSOT25 pin package.

Feature(s)

  • Simple low parts count
  • Internal 30V NDMOS switch
  • 350mA output current
  • Single pin on/off and brightness control using DC voltage or PWM
  • Internal PWM filter
  • Soft-start
  • High efficiency (up to 95%)
  • Wide input voltage range: 7V to 30V
  • 40V transient capability
  • Output shutdown
  • Up to 1MHz switching frequency
  • Inherent open-circuit LED protection
  • Typical 4% output current accuracy

Application(s)

  • Low voltage halogen replacement LEDs
  • Automotive lighting
  • Low voltage industrial lighting
  • LED back-up lighting
  • Illuminated signs

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Topologies (Charge Pump) No
Minimum Input Voltage (V) 7
Maximum Output Voltage (V) 30
Maximum LED Current (A) 0.38
LED Current Accuracy (%) 5
Switching Frequency Maximum (kHz) 1000
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 95
Operating Temperature Range (°C) -40 to 105
Sense Voltage (mV) 100
AEC-Q100 Grade No

Related Content

Packages

Orderable Part Number Buy from Distributor / Contact Sales Request Samples
ZXLD1350ET5TA

ZXLD1350ET5TA

Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
RS Components - Spain 165 6/30/2022 Spain Contact Sales
RS Components - UK 165 6/30/2022 England Buy Now
Request Sample

Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2312 2018-04-11 2018-07-11 Qualification of Additional Bill of Materials (BOM), Top Marking, and Fab Source for Select Products