LED2001PHR

LED2001PHR is a 4A monolithic step-down current source with synchronous rectification. This is aN 850KHz fixed switching frequency monolithic step-down DC-DC converter designed to operate as precise constant current source with an adjustable current capability up to 4A DC. The embedded PWM dimming circuitry features LED brightness control. The regulated output current is set connecting a sensing resistor to the feedback pin. The embedded synchronous rectification and the 100mV typical RSENSE voltage drop enhance the efficiency performance. The size of the overall application is minimized due to the high switching frequency and ceramic output capacitor compatibility. Application includes high brightness LED driving, signage, halogen bulb replacement, general lighting.

• 3 to 18V operating input voltage range (TJ = 25°C, VCC = 12V)
• PWM dimming, ±7% output current accuracy, synchronous rectification
• 95mohm typical low-side switch on-resistance (ISW=750mA, TJ = 25°C, VCC = 12V)
• Peak current mode architecture, embedded compensation network
• Ceramic output capacitor compliant, internal current limiting
• Thermal shutdown
• 0.7 to 1MHz switching frequency range (TJ = 25°C, VCC = 12V)
• 0 to 100% duty cycle range (TJ = 25°C, VCC = 12V)
• 1.5mA typical quiescent current (TJ = 25°C, VCC = 12V)
• 8 pin HSOP package, operating junction temperature range from -40 to 150°C