CAT4002A, CAT4004A Constant Current LED Driver with 32 Dimming Levels and Rset
■The CAT4002A and CAT4004A provide respectively two and four matched low dropout current sources to drive LEDs. The CAT400XA uses an external resistor RSET to set the current in the LED channels. Each LED channel includes an individual control loop allowing the device to handle a wide range of LED forward voltages while still maintaining tight current matching. The EN/DIM logic inputs supports device enable and a digital dimming interface for setting the LED channel current with 32 linear dimming levels. LEDs can be powered directly from a Lithium−ion battery due to the low dropout (50 mV at 20 mA) current sinks. The device is available in the tiny 8−pad UDFN 2 mm x 2 mm package with a max height of 0.55 mm, as well as the 6−lead TSOT−23 and SC−70.
●Features
■2 and 4 LED Current Sinks with Tight Matching
■32 Dimming Levels
■Low Dropout Driver 50 mV at 20 mA
■No Switching Noise
■Shutdown Current less than 1 μA
■LED Current set by ExternalTM
■Dimming via 1−wire EZDim
■Thermal Shutdown Protection Interface
■6−lead TSOT−23, SC−70, and 8−pad UDFN 2 mm x 2 mm Packages
■These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
| 世强硬创平台www.sekorm.com | |
| 世强硬创平台电子商城www.sekorm.com/supply/ | |
| 世强硬创平台www.sekorm.com | |
| 世强硬创平台www.sekorm.com |
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