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SC604A

Semtech
Part Number SC604A
Manufacturer Semtech
Description Low Noise - High Efficiency Regulated White LED Driver
Published Apr 18, 2010
Detailed Description Low Noise, High Efficiency www.DataSheet4U.com Regulated White LED Driver POWER MANAGEMENT OBJECTIVE Description -NOVEMB...
Datasheet PDF File SC604A PDF File

SC604A
SC604A

Overview
Low Noise, High Efficiency www.
DataSheet4U.
com Regulated White LED Driver POWER MANAGEMENT OBJECTIVE Description -NOVEMBER Features 9, 2000 Very high efficiency over 90% of battery life The SC604A is a very high efficiency charge pump white LED driver driver from the mAhXLifeTM family of products, optimized for Li-Ion battery applications.
The four (4) LED outputs are current matched for consistent LED brightness.
Extremely low battery current is achieved by automatically reconfiguring the charge pump to match circuit conditions.
Using four LEDs, each at 20mA for a total IOUT= 80mA, the SC604A can use less than 83mA from the supply for most of the battery life.
Patented low noise mode switching circuitry and constant output current allow the use of extremely small input and output capacitors.
SC604A Peak efficiency over 92% Current regulation for up to 4 LEDs Digital 3 bit output control logic Current matching tolerance of ±3% typical Wide current range per LED [0.
5mA - 30mA] High available total LED current = 4 ILED = 120mA Low Shutdown Current: 1µA typical Soft start / In-rush current limiting Short circuit protection MLP-16 [4x4] Package Fixed frequency 250kHz 1x, 1.
5x and 2x charge pump modes of operation Applications Cellular phones LED backlighting PDA power supplies Portable devices Electronic books Wireless web appliances LCD Modules Typical Application Circuit Patent Pending VIN BATTERY 1µ F VOUT 1µ F SC604A EN CTRL0 CTRL1 CTRL2 GND C1+ 1µF ILED1 ILED2 ILED3 ILED4 ISET C1C2+ 1µF C2- June 27, 2005 1 United States Patents: 6,504,422, 6,794,926 www.
semtech.
com SC604A POWER MANAGEMENT Absolute Maximum Ratings Exceeding the specifications below may result in permanent damage to the device, or device malfunction.
Operation outside of the parameters specified in the Electrical Characteristics section is not implied.
www.
DataSheet4U.
com Parameter Sup p ly Voltage Outp ut Voltage VOUT Shor t Circuit Duration Thermal Resistance, Junction to Ambient Op e...


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