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CAT4002BSD-GT3 Datasheet(PDF) 1 Page - ON Semiconductor |
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CAT4002BSD-GT3 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 11 page © Semiconductor Components Industries, LLC, 2010 January, 2010 − Rev. 2 1 Publication Order Number: CAT4002B/D CAT4002B, CAT4003B, CAT4004B Constant Current Programmable LED Driver with 32 Dimming Levels Description The CAT4002B, CAT4003B and CAT4004B provide respectively two, three and four matched low dropout current sources to drive LEDs. The CAT400XB requires no external RSET resistor; the LED current is internally set to 25 mA when the device is first enabled. 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 input supports the 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 (75 mV at 20 mA) current sinks. Package options are available including the 4−channel tiny 8−pad UDFN 2 mm x 2 mm with a max height of 0.55 mm, and 2 or 3− channel in the 6−lead TSOT−23 and SC−70. Features • 2, 3, 4 LED Current Sinks with Tight Matching • 32 Dimming Levels • Low Dropout Driver 75 mV at 20 mA • No Switching Noise • Shutdown Current less than 1 mA • 25 mA Max LED Current per Channel • Dimming via 1−wire EZDimt Interface • Thermal Shutdown Protection • RoHS Compliant • 6−lead TSOT−23, SC−70, and 8−pad UDFN 2 mm x 2 mm Packages Typical Applications • LCD Display Backlight • Cellular Phones • Digital Still Cameras http://onsemi.com See detailed ordering information on page 2 of this data sheet. ORDERING INFORMATION SC70−6 SD SUFFIX CASE 419AD TSOT23−6 TD SUFFIX CASE 419AF UDFN−8 HU2 SUFFIX CASE 517AW TYPICAL APPLICATION CIRCUIT GND VIN 2.4 V to 5.5 V EN/DIM CAT4002B VIN 1 mF LED1 LED2 One Wire Programming 32 Steps CIN |
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