LTC3208EUH#TRPBF Linear Technology, LTC3208EUH#TRPBF Datasheet
LTC3208EUH#TRPBF
Specifications of LTC3208EUH#TRPBF
Available stocks
Related parts for LTC3208EUH#TRPBF
LTC3208EUH#TRPBF Summary of contents
Page 1
... Color Combinations for the RGB Display 5mm × 5mm 32-Lead QFN Plastic Package ■ U APPLICATIO S Video/Camera Phones with QVGA + Displays ■ , LTC and LT are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 6411531. U TYPICAL APPLICATIO ...
Page 2
LTC3208 ABSOLUTE AXI U RATI GS (Note CPO to GND ................................– 0 BAT CC SDA, SCL, ENRGBS, CAMHL .....– 0.3V to (DV I (Note 2) ............................................................1.3A CPO ...
Page 3
ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 4.7µF, unless otherwise noted. PARAMETERS White LED Current (CAM1-4), 4-Bit Linear DAC Full-Scale LED Current Minimum (1LSB) LED Current LED Current Matching LED Dropout Voltage White ...
Page 4
LTC3208 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are 4.7µF, unless otherwise noted. PARAMETERS t SU,STA t SU,STO t HD,DAT(OUT) t HD,DAT(IN) t SU,DAT t LOW t HIGH ...
Page 5
W U TYPICAL PERFOR A CE CHARACTERISTICS LED Pin Dropout Voltage vs LED Pin Current 600 V = 3.6V BAT T = 25°C A 500 400 300 200 100 LED ...
Page 6
LTC3208 W U TYPICAL PERFOR A CE CHARACTERISTICS 1x Mode No Load V Current vs BAT V Voltage BAT 300 T = 25°C A 290 280 270 260 250 240 230 220 210 200 2.7 3.0 3.3 3.6 3.9 4.2 ...
Page 7
CTIO S CAM1-4 (Pins 4): Current Source Outputs for the CAM Display White LEDs. The LEDs on the CAM display can be set from 0mA to 102mA in 16 steps via software ...
Page 8
LTC3208 CTIO S BLUE, GRN, RED (Pins 21, 22, 23): Current Source Outputs for the RGB Illuminator LEDs. The RGB currents can be independently set via the serial port. Currents up to 27mA can be ...
Page 9
W BLOCK DIAGRA 900kHz OSCILLATOR V 30 BAT1 V BAT2 24 V BAT3 12 – – REF DV 14 1.215V CC ENRGBS 28 CONTROL MASTER/ SLAVE REG 9 CAMHL SDA 11 REGISTER SCL 10 U OPERATIO ...
Page 10
LTC3208 U OPERATIO Soft-Start Initially, when the part is in shutdown, a weak switch con- nects V to CPO. This allows V BAT BAT1,2 the CPO output capacitor and prevent large charging currents to occur. The LTC3208 also employs a ...
Page 11
U OPERATIO Shutdown Current Shutdown occurs when all the current source data bits have been written to zero or when DV UVLO threshold. Although the LTC3208 is designed to have very low shut- down current, it will draw about 3µA ...
Page 12
LTC3208 U OPERATIO Disabling Current Source Outputs Unused CAM, SUB and MAIN outputs can be disabled by using two different methods depending on the application requirement. If the entire group disabled (ie MAIN), then the data register ...
Page 13
U OPERATIO R Current Set Resistor REF The current set resistor is connected between RREF and ground. The value of this resistor should typically be near 24k since all of the DAC reference currents and support circuit currents are related ...
Page 14
LTC3208 U OPERATIO Write Word Protocol Used By the LTC3208 SLAVE ADDRESS WR A *SUB-ADDRESS Start Condition Write Bit = Acknowledge Stop Condition *The ...
Page 15
U OPERATIO REGE, AUXILIARY LED 8-Bit MUX Data, Selects DAC for Each AUX Output, Register Sub-Address = 101 AUX4 E7 E6 SELECT 0 0 AUX 0 1 MAIN 1 0 SUB 1 1 CAM REGF, CAMERA LED 4-Bit High and ...
Page 16
LTC3208 U OPERATIO Bus Speed 2 The I C port is designed to be operated at speeds 400kHz. It has built-in timing delays to ensure correct operation when addressed from an I device. It also contains input ...
Page 17
U U APPLICATIO S I FOR ATIO V , CPO Capacitor Selection BAT The value and type of capacitors used with the LTC3208 determine several important parameters such as regulator control loop stability, output ripple, charge pump strength and minimum ...
Page 18
LTC3208 U U APPLICATIO S I FOR ATIO the rated voltage is applied. Therefore, when comparing different capacitors often more appropriate to compare the amount of achievable capacitance for a given case size rather than comparing the specifi ...
Page 19
U U APPLICATIO S I FOR ATIO Power Effi ciency To calculate the power effi ciency (η white LED driver chip, the LED power should be compared to the input power. The difference between these two numbers represents ...
Page 20
LTC3208 U TYPICAL APPLICATIO S 6-LED MAIN, RGB Plus Low/High Current 8-LED Camera Light C2 C3 2.2µF 2.2µF C1P C1M C2P C2M V V CPO BAT BAT1 C1 LTC3208 4.7µF V BAT2 V MAIN1-4 BAT3 0.1µ SCL/SDA ...
Page 21
U TYPICAL APPLICATIO 2.2µF 2.2µF C1P C1M C2P C2M V CPO V BAT1 BAT C1 LTC3208 4.7µF V BAT2 V MAIN1-4 BAT3 0.1µF 2 SCL/SDA SUB1 CAM1 0.1µF AUX1-4 ENRGBS ENABLE ...
Page 22
LTC3208 U TYPICAL APPLICATIO S 6-LED MAIN, 4-LED Camera Light, 4-LED Fun Lights with Vibrator Motor C2 C3 2.2µF 2.2µF C1P C1M C2P C2M V V BAT1 CPO BAT C1 LTC3208 4.7µF V BAT2 V MAIN1-4 BAT3 0.1µF 2 SCL/SDA ...
Page 23
... SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 32-Lead Plastic QFN (5mm × ...
Page 24
... LTC3440 600mA (I ), 2MHz Synchronous Buck-Boost OUT DC/DC Converter LT3465/LT3465A 1.2MHz/2.7MHz with Internal Schottky ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 6-LED MAIN, 800mA Camera LED, Plus RGB Driver ...