(China (Mainland))
Product Summary
The LM3519MKX-20 is a high frequency boost white LED driver with high speed PWM brightness control. The LED current is internally set to 20mA. The series connection allows the LED current to be identical for uniform brightness and minimizes the number of traces to the LEDs. Brightness control is achieved by applying a PWM aignal on enable with frequencies up to 30 KHZ. The LM3519MKX-20 features a proprietary PFM regulation architecture with awitching frequencies between 2 MHZ to 8MHZ, minimizing inductor size. Over voltage protection circuitry and high frequency operation permit the use of low cost small output capacitors. During shutdown, the output is disconnected from the input in order to avoid leakage current path through the LEDs to ground. The LM3519MKX-20 is available in a tiny 6 pin SOT23 package.
Parametrics
LM3519MKX-20 absolute maximum ratings: (1)VIN , En, & LED_rtn Pin: -0.3V to +6.5V; (2)VOUT , Sw Pin: -0.3V to +21V; (3)Maximum Junction Temperature (TJ-MAX): +150℃; (4)Storage Temperature Range: -65℃ to +150℃; (5)ESD Rating Human Body Model: 2kV; (6)Machine Model: 200V; (7)Operating Junction Temperature (TJ) Range: -40℃ to +125℃; (8)Ambient Temperature (TA) Range: -40℃ to +85℃; (9)Input Voltage Range: 2.7V to 5.5V.
Features
LM3519MKX-20 features: (1)drives 2 to 4 LEDs at 20mA; (2)up to 30khz PWM dimming control capability; (3)＞80% peak efficiency; (4)up to 8 mhz switching frequency; (5)small external components: 1μH-3.3μH inductor and 1μF output capacitor; (6)true shutdown isolation; (7)over voltage protection; (8)wide input voltage range: 2.7V to 5.5V; (9)small footprint SOT23-6 package.
Diagrams
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 LM3519MKX-20 |
National Semiconductor (TI) |
LED Lighting Drivers |
Data Sheet |
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LM3519MKX-20/NOPB |
National Semiconductor (TI) |
LED Lighting Drivers |
Data Sheet |
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