Catalyst Introduces New High Power LED Drivers for LCD Panel Market
The LCD panel market expands its high-power LED drivers. The CAT4139 boost converter delivers up to 750mA switching current and can drive LED strings up to 22V, making it ideal for digital photo frames and other emerging applications that require up to 40 LEDs for backlighting.
Most high output voltage boost converters use a simple frequency variable switching circuit architecture. This architecture produces spectrum-wide redundant harmonics, designers
Difficult to filter or eliminate; the CAT4139 uses a fixed frequency (1MHz) switching circuit architecture, ideal for low noise applications. In addition, the device features a high-voltage CMOS output stage that accurately drives five series-connected LEDs (output voltages up to 22V) at low input voltages with conversion efficiencies as high as 87%. The CAT4139 complements Catalyst's CAT4240 high-power boost converter, which was launched at the beginning of the year. The CAT4240 can drive up to 10 LEDs in series with an output voltage of up to 38V.
To suppress the in-rush current generated during power-up, the CAT4139 integrates a soft-start control circuit. In the case of open LED damage, the on-chip overvoltage protection circuit forces the chip into a low-power mode by limiting the chip's output voltage without any additional components. The above two features have been fully integrated into the chip, eliminating the need for external components and associated costs, and saving board space.
Designers can control the brightness of the LED by controlling the CAT4139 with a DC voltage, logic signal, or PWM (Pulse Width Modulation) signal.
Features
Switching current up to 750mA
Drives high voltage LED strings with output voltages up to 22V
1MHz fixed frequency low noise architecture
Complete protection
5-pin TSOT23 thin package (maximum height is 1mm)
Supply and price
The CAT4139 LED driver is priced at $0.64 in 10,000 units. Samples are available now. The production delivery time is 6-8 weeks after the order is received.
Most high output voltage boost converters use a simple frequency variable switching circuit architecture. This architecture produces spectrum-wide redundant harmonics, designers
Difficult to filter or eliminate; the CAT4139 uses a fixed frequency (1MHz) switching circuit architecture, ideal for low noise applications. In addition, the device features a high-voltage CMOS output stage that accurately drives five series-connected LEDs (output voltages up to 22V) at low input voltages with conversion efficiencies as high as 87%. The CAT4139 complements Catalyst's CAT4240 high-power boost converter, which was launched at the beginning of the year. The CAT4240 can drive up to 10 LEDs in series with an output voltage of up to 38V.
To suppress the in-rush current generated during power-up, the CAT4139 integrates a soft-start control circuit. In the case of open LED damage, the on-chip overvoltage protection circuit forces the chip into a low-power mode by limiting the chip's output voltage without any additional components. The above two features have been fully integrated into the chip, eliminating the need for external components and associated costs, and saving board space.
Designers can control the brightness of the LED by controlling the CAT4139 with a DC voltage, logic signal, or PWM (Pulse Width Modulation) signal.
Features
Switching current up to 750mA
Drives high voltage LED strings with output voltages up to 22V
1MHz fixed frequency low noise architecture
Complete protection
5-pin TSOT23 thin package (maximum height is 1mm)
Supply and price
The CAT4139 LED driver is priced at $0.64 in 10,000 units. Samples are available now. The production delivery time is 6-8 weeks after the order is received.
LED Lighting Aluminum Alloy Die Casting
Led Lighting Aluminum Alloy Die Casting,Oem Aluminium Alloy Die,Led Zinc Die Casting,Aluminium Led Light Housing
Dongguan Metalwork Technology Co., LTD. , https://www.dgdiecastpro.com