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CAT4004 Datasheet(PDF) 1 Page - ON Semiconductor |
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CAT4004 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 10 page © Semiconductor Components Industries, LLC, 2010 March, 2010 − Rev. 2 1 Publication Order Number: CAT4004/D CAT4004 4-Channel Constant Current LED Driver with EZDimt Description The CAT4004 provides four matched low dropout current sources to drive LEDs. An external resistor on RSET sets 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 current setting of all LEDs. Six different current dimming ratios are available. The device is aimed at “direct drive” battery applications. It is required that the battery or voltage source have enough headroom to drive the LED forward voltage and current sink (>150 mV). The device is available in a tiny 8−lead TDFN 2 mm x 3 mm package with a max height of 0.8 mm. Features • Four LED Current Sinks with Tight Matching • Low Dropout Driver 130 mV at 30 mA • No Switching Noise • Shutdown Current < 1 mA • LED Current set by External Resistor • Dimming via 1−wire EZDimt Interface • Thermal Shutdown Protection • 8−lead 2 mm x 3 mm TDFN Package • These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant Applications • LCD Display Backlight • Cellular Phones • Digital Still Cameras • Handheld Devices Figure 1. Typical Application Circuit CAT4004 VIN EN/DIM RSET GND LED1 LED2 LED3 LED4 RSET 3.8 kW One wire programming 20 mA 1 mF 2.4 V to 5.5 V CIN VIN http://onsemi.com PIN CONNECTIONS MARKING DIAGRAMS FX = CAT4004VP2−T3 HA = CAT4004VP2−GT3 A = Assembly Location XXX = Last Three Digits of Assembly Lot Number Y = Production Year (Last Digit) M = Production Month (1−9, A, B, C) (Top View) Device Package Shipping ORDERING INFORMATION CAT4004VP2−T3 (Note 1) TDFN−8 (Pb−Free) 3,000/ Tape & Reel 1. Matte−Tin Plated Finish (RoHS−compliant). 2. NiPdAu Plated Finish (RoHS−compliant). TDFN−8 VP2 SUFFIX CASE 511AK CAT4004VP2−GT3 (Note 2) TDFN−8 (Pb−Free) 3,000/ Tape & Reel LED3 RSET VIN LED2 LED1 GND EN/DIM LED4 1 FXA XXX YM HAA XXX YM |
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