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ZXLD1352

Features: • Simple low parts count• Internal 30V NDMOS switch• 350mA output current• Single pin on/off and brightness control using DC voltage or PWM• 1000:1 PWM dimming range• Soft-start• High efficiency (up to 95%(*))• Wide input voltage range: 7V ...

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SeekIC No. : 004552410 Detail

ZXLD1352: Features: • Simple low parts count• Internal 30V NDMOS switch• 350mA output current• Single pin on/off and brightness control using DC voltage or PWM• 1000:1 PWM dimmin...

ZXLD1352 Data Sheet

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Part Number:
ZXLD1352
Supply Ability:
5000

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

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Product Details

Description



Features:

• Simple low parts count
• Internal 30V NDMOS switch
• 350mA output current
• Single pin on/off and brightness control using DC voltage or PWM
• 1000:1 PWM dimming range
• 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
(*) Using standard external components as specified under electrical characteristics. Efficiency is dependent upon the
number of LEDs driven and on external component types and values.




Application

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




Pinout

Connection Diagram




Specifications

Part Number ZXLD1352
Min.- Max. Input Voltage (V) 7 ~ 30
Output Voltage (V) 30
Typ Peak Output Current (A) 0.35
Max Output Current (mA) -
LED Current Accuracy (%) 5
Frequency (kHz) typ 1000
Efficiency (%) 97
Operating Temperature (C) -40 to +105
Quiescent Current (mA) typ -
Standby Quiescent Current (uA) typ 20


Input voltage (VIN) ...................................-0.3V to +30V (40V for 0.5 sec)
ISENSE voltage (VSENSE) .......+0.3V to -5V (measured with respect to VIN)
LX output voltage (VLX) .............................-0.3V to +30V (40V for 0.5 sec)
Adjust pin input voltage (VADJ) ..............................................-0.3V to +6V
Switch output current (ILX)............................................................. 500mA
Power dissipation (Ptot)..................................................................450mW
(Refer to package thermal de-rating curve on page 18)
Operating temperature (TOP) .................................................-40 to 105
Storage temperature (TST)..................................................... -55 to 150
Junction temperature (Tj MAX)............................................................ 150

These are stress ratings only. Operation above the absolute maximum rating may cause device failure. Operation at
the absolute maximum ratings, for extended periods, may reduce device reliability.




Description

The ZXLD1352 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 currentof up to 350mA. Depending upon supply voltage and external components, this can provide up to 8 watts of output power.

The ZXLD1352 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. DC voltages between 0.3V and 2.5V allow adjustment of output current from 25% to 200% of nominal. 1000:1 adjustment of output current is possible using PWM control.

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 TSOT23-5 pin package.






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