LTC3209-2 Linear Technology, LTC3209-2 Datasheet
LTC3209-2
Related parts for LTC3209-2
LTC3209-2 Summary of contents
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... LED controllers. These parts contain a high efficiency, low noise charge pump to provide power to MAIN, CAM and AUX LED displays. The LTC3209-1/ LTC3209-2 require only four small ceramic capacitors and one current set resistor to form a complete LED power supply and current controller. ...
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... LTC3209-1/LTC3209 ABSOLUTE AXI U RATI GS (Note CPO to GND ............................... –0 BAT CC SDA, SCL, CAMHL ..................... –0.3V to (DV I (Note 4)....................................................... 700mA CPO I (Note 5) ................................................... 31mA MAIN1-6 I (Note 5) ......................................................... 30mA AUX PACKAGE/ORDER I FOR ATIO TOP VIEW www.DataSheet4U.com CPO 1 MAIN1 2 MAIN2 3 21 MAIN3 4 MAIN4 ...
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... White LED Current (CAM), LTC3209-1, 4-Bit Linear DAC Full-Scale LED Current Minimum (1LSB) LED Current LED Dropout Voltage www.DataSheet4U.com White LED Current (CAM1-2), LTC3209-2, 4-Bit Linear DAC Full-Scale LED Current Minimum (1LSB) LED Current LED Current Matching LED Dropout Voltage AUX LED Current, 2-Bit Linear DAC ...
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... Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LTC3209-1/LTC3209-2 are guaranteed to meet performance www.DataSheet4U.com specifications from 0°C to 70°C. Specifications over the –40°C to 85°C ambient operating temperature range are assured by design, characterization and correlation with statistical process controls ...
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... V VOLTAGE (V) BAT 3209 G12 LTC3209-1 CAM Pin Current vs CAM Pin Voltage 400 V = 3.6V BAT 300 200 100 0 500 0 0.2 0.4 0.6 CAM PIN VOLTAGE (V) 3209 G15 LTC3209-1/LTC3209 25°C unless otherwise noted A DV Shutdown Current Voltage CC 0 3.6V BAT 3.4V 0.6 3.5V 0 0.4 0.3 3.1V 0 BAT 0 ...
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... BAT AUX HEX CODE 3209 G27 T = 25°C unless otherwise noted A LTC3209-2 CAM Pin Current vs Input Code 200 V = 3.6V BAT 180 160 140 120 100 0.8 1 ...
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... CPO. Setting data in REGA to 0 disables all MAIN outputs. www.DataSheet4U.com MAIN1-5 (Pins LTC3209-2): Current Source Outputs for the MAIN Display White LEDs. The LEDs on the MAIN display can be set from 0mA to 28mA in 256 steps via software control and internal 8-bit linear DAC. Each output can be disabled externally by connecting the output to CPO ...
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... CAMHL SDA SCL 8 C1P C1M CHARGE PUMP ENABLE CP 1.23V CONTROL LOGIC MASTER/SLAVE REG SHIFT REGISTER C2P C2M 6 MAIN CURRENT SOURCES 2 CAM CURRENT SOURCES AUX CURRENT SOURCE 320912 BD GND CPO MAIN1 MAIN2 MAIN3 MAIN4 MAIN5 MAIN6 (LTC3209-1) CAM1 CAM2 (LTC3209-2) AUX 320912fa ...
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... U OPERATIO The LTC3209-1 has 6 MAIN outputs, 1 CAM output and 1 AUX output. The LTC3209-2 has 5 MAIN outputs, 2 CAM outputs and 1 AUX output. Power Management The LTC3209-1/LTC3209-2 use a switched capacitor charge pump to boost CPO to as much as 2 times the input voltage up to 5.1V. The part starts mode. In this mode connected directly to CPO ...
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... Shutdown Current Shutdown occurs when all the current source data bits have been written to zero or when DV UVLO threshold. Although the LTC3209-1/LTC3209-2 is designed to have very low shutdown current, it will draw about 3µA from V when in shutdown. Internal logic ensures that the BAT LTC3209-1/LTC3209 shutdown when DV grounded ...
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... Serial Port The microcontroller compatible I of the command and control inputs for the LTC3209-1/ LTC3209-2. Data on the SDA input is loaded on the rising edge of SCL loaded first and D0 last. There are three data registers and one address register. Once all address bits have been clocked into the address register acknowl- edge occurs ...
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... In addition the current source outputs and charge pump are disabled. Mode Switching The LTC3209-1/LTC3209-2 will automatically switch from 1x mode to 1.5x mode and subsequently to 2x mode whenever a dropout condition is detected at an LED pin. Dropout occurs when a current source voltage becomes too low for the programmed current to be supplied ...
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... U OPERATIO www.DataSheet4U.com LTC3209-1/LTC3209-2 320912fa 13 ...
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... Timing Diagram (Figure 5) shows the timing relationship of the signals on the bus. The two bus lines, SDA and SCL, must be high when the bus is not in use. External pull-up resistors or current sources, such as the LTC1694 SMBus accelerator, are required on these lines. The LTC3209-1/LTC3209 receive-only (slave) device ...
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... LTC3209-1/LTC3209-2 Bus Write Operation The master initiates communication with the LTC3209-1/ LTC3209-2 with a START condition and a 7-bit address followed by the Write Bit R the address matches that of the LTC3209-1/LTC3209-2, the part returns an Acknowledge. The master should then deliver the most significant data byte ...
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... ESR. Input CPO noise can be further reduced by powering the LTC3209- 1/LTC3209-2 through a very small series inductor as shown in Figure 6. A 10nH inductor will reject the fast current notches, thereby presenting a nearly constant current load to the input power supply. For economy, the 10nH inductor can be fabricated on the PC board with about 1cm (0.4" ...
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... To decouple capacitive energy transfer, a Faraday shield may be used. This is a grounded PCB trace between the sensitive node and the LTC3209-1/ LTC3209-2 pins. For a high quality AC ground, it should be returned to a solid ground plane that extends all the way to the LTC3209-1/LTC3209-2. ...
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... LED currents. At moderate to high output power, the quiescent current of the LTC3209-1/LTC3209-2 is negligible and the expres- sion above is valid. Once dropout is detected at the LED pin, the LTC3209-1/ LTC3209-2 enables the charge pump in 1.5x mode 1.5x boost mode, the efficiency is similar to that of a linear regulator with an effective input voltage of 1 ...
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... Plastic QFN (4mm × 4mm) (Reference LTC DWG # 05-08-1710) 0.70 ±0.05 PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 0.75 ± 0.05 4.00 ± 0.10 (4 SIDES) 2.45 ± 0.10 (4-SIDES) 0.200 REF 0.00 – 0.05 LTC3209-1/LTC3209-2 BOTTOM VIEW—EXPOSED PAD PIN 1 NOTCH R = 0.115 R = 0.30 TYP TYP 19 20 0.38 ± 0. (UF20) QFN 10-04 0.25 ± 0.05 0.50 BSC ...
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... LTC3209-1/LTC3209-2 TYPICAL APPLICATIO 4 LED MAIN, 1 LED SUB, 400mA CAM LED Controller Plus Regulated Output C1P C1M V BAT 2.2µF C6 0.1µ 0.1µF www.DataSheet4U.com SCL SDA TORCH FLASH CAMHL R1 24.3k RELATED PARTS PART NUMBER DESCRIPTION LTC3200-5 Low Noise, 2MHz Regulated Charge Pump ...