LTC3209-1 LINER [Linear Technology], LTC3209-1 Datasheet
LTC3209-1
Related parts for LTC3209-1
LTC3209-1 Summary of contents
Page 1
... 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 U PACKAGE/ORDER I FOR ATIO TOP VIEW CPO 1 MAIN1 2 MAIN2 3 21 MAIN3 4 MAIN4 ...
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... White LED Current (MAIN1-6), 8-Bit Linear DAC Full-Scale LED Current Minimum (1LSB) LED Current LED Current Matching LED Dropout Voltage White LED Current (CAM), LTC3209-1, 4-Bit Linear DAC Full-Scale LED Current Minimum (1LSB) LED Current LED Dropout Voltage White LED Current (CAM1-2), LTC3209-2, 4-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 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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... CPO VBAT CPO 3.6V BAT 100 200 300 400 500 LOAD CURRENT (mA) 3209 G14 LTC3209-1 CAM Pin Current vs Input Code 400 V = 3.6V BAT 360 320 280 240 200 160 120 ...
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... LTC3209-1/LTC3209 TYPICAL PERFOR A CE CHARACTERISTICS LTC3209-1 CAM Pin Dropout Voltage vs CAM Pin Current 400 V = 3.6V BAT 360 320 280 220 200 160 120 100 200 300 400 CAM PIN CURRENT (mA) 3209 G24 LTC3209-2 CAM Pin Dropout Voltage vs CAM Pin Current ...
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... CPO (Pin 1/Pin 1): Output of the Charge Pump Used to Power LEDs. A 2.2µF X5R or X7R ceramic capacitor should be connected to ground. MAIN1-6 (Pins LTC3209-1): 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 ...
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... CC CAMHL SDA SCL 8 C1P C1M C2P CHARGE PUMP ENABLE CP CONTROL LOGIC MASTER/SLAVE REG SHIFT REGISTER C2M GND CPO MAIN1 MAIN2 MAIN3 6 MAIN CURRENT MAIN4 SOURCES MAIN5 MAIN6 (LTC3209-1) 2 CAM CURRENT CAM1 SOURCES CAM2 (LTC3209-2) AUX CURRENT AUX SOURCE 320912 BD 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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... The microcontroller compatible I C serial port provides all 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 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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... Each byte sent to the LTC3209-1/LTC3209-2 must be 8 bits long followed by an extra clock cycle for the Acknowledge bit to be returned by the LTC3209-1/LTC3209- 2. The data should be sent to the LTC3209-1/LTC3209-2 most significant bit (MSB) first. Acknowledge The Acknowledge signal is used for handshaking between the master and the slave ...
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... The output ripple in 2x mode is very small due to the fact that load current is supplied on both cycles of the clock. Both style and value of the output capacitor can signifi- cantly affect the stability of the LTC3209-1/LTC3209-2. As shown in the Block Diagram, the LTC3209-1/LTC3209-2 use a control loop to adjust the strength of the charge pump to match the required output current ...
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... The large dv/dt on these pins can couple energy capacitively to adjacent PCB runs. Magnetic fields can also be generated if the flying capaci- tors are not close to the LTC3209-1/LTC3209-2 (i.e., the loop area is large). 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 ...
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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 ...
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... U UF Package 20-Lead 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 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 U TYPICAL APPLICATIO 4 LED MAIN, 1 LED SUB, 400mA CAM LED Controller Plus Regulated Output C2 2.2µF C1P C1M V BAT V BAT1 C1 V BAT2 2.2µF C6 LTC3209-1 0.1µ 0.1µF SCL SDA TORCH FLASH CAMHL R REF R1 24.3k RELATED PARTS PART NUMBER DESCRIPTION LTC3200-5 ...