LP3943 ,RGB/White/Blue 16-LED Fun Light Driverapplications where it is required to cut down on busKey Specificationstraffic.n 16 LED driver (mult ..
LP3943ISQ ,RGB/White/Blue 16-LED Fun Light DriverPin DescriptionPin # Name Description1 LED0 Output of LED0 Driver2 LED1 Output of LED1 Driver3 LED2 ..
LP3944ISQ ,RGB/White/Blue 8-LED Fun Light DriverPin DescriptionPin # Name Description1 LED0 Output of LED0 Driver2 LED1 Output of LED1 Driver3 LED2 ..
LP3944ISQ/NOPB ,RGB/White/Blue 8-LED Fun Light Driver 24-WQFN -40 to 85FEATURES DESCRIPTIONLP3944 is an integrated device capable of2• Internal Power-on Resetindependentl ..
LP3944ISQX ,RGB/White/Blue 8-LED Fun Light Driverapplications where it is required to cut down on bus traffic.Key SpecificationsTraditionally,todimL ..
LP3945EV ,Battery Charge Management SystemFeaturesn Integrated pass transistorTheLP3945andLP3946arecompletechargemanagementsystemsthatsafelyc ..
LT1028AMH ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1028CSW ,Ultra Low Noise Precision High Speed Op Amps
LT1030C , QUADRUPLE LOW-POWER LINE DRIVER
LT1030CD ,Quadruple Low-Power Line Drivermaximum ratings” may cause permanent damage to the device. These are stress ratings only, andfuncti ..
LP3943-LP3943ISQ
RGB/White/Blue 16-LED Fun Light Driver
LP3943
RGB/White/Blue 16-LED Fun Light Driver
General DescriptionLP3943isan integrated device capableof independently
driving16 LEDs. This device also containsan internal pre-
cision oscillator that providesall the necessary timing re-
quiredfor driving each LED. Two prescaler registers along
with two PWM registers providea versatile duty cycle con-
trol. The LP3943 containsthe abilityto dim LEDsin SMBUS/2C applications whereitis requiredto cut downon bus
traffic.
Traditionally,to dim LEDs usinga serial shift register suchas
74LS594/5 would requirea large amountof traffictobeon
the serial bus. LP3943 instead requires onlythe setupofthe
frequency and duty cyclefor each output pin. From thenon,
onlya single command fromthe hostis requiredto turn each
individual open drain output ON, OFF,orto cyclea pro-
grammed frequency and duty cycle. Maximum output sink
currentis25 mAperpin and 200mAper package.Any ports
not usedfor controlling the LEDs canbe usedfor general
purpose input/output expansion.
Features Internal power-on reset Active low reset Internal precision oscillator Variable dim rates (from 6.25msto 1.6s;
160 Hz–0.625 Hz)
Key Specifications16 LED driver (multiple programmable states—on,off,
input, and dimmingata specified rate)16 Open drain outputs capableof drivingupto25 mA
per LED
Applications Customized flashing LED lightsfor cellular phones Portable Applications Digital Cameras Indicator Lamps General purposeI/O expander Toys
Typical Application CircuitNovember 2003
LP3943
RGB/White/Blue
16-LED
Fun
Light
Driver
