PDF, 1.0 Mb, Revisión: C, Archivo publicado: marzo 10, 2013
Extracto del documento
LP3958
www.ti.com SNVS423C – JANUARY 2006 – REVISED MARCH 2013 Lighting Management Unit with High Voltage Boost Converter
Check for Samples: LP3958 FEATURES DESCRIPTION LP3958 is a Lighting Management Unit for portable
applications. It is used to drive display backlight and
keypad LEDs. The device can drive 5 separately
connected strings of LEDs with high voltage boost
converter. 1 2 High-Efficiency Boost Converter With
Programmable Output Voltage
Two Individual Drivers for Serial Display
Backlight LEDs
Three Drivers for Serial Keypad LEDs
Automatic Dimming Controller
Stand Alone Serial Leypad LEDs Controller
Three General-Purpose IO Pins
25-Bump DSBGA Package: 2.54mm x 2.54mm
x 0.6mm The device is controlled through 2-wire low voltage
I2C compatible interface that reduces the number of
required connections. APPLICATIONS The keypad LED driver allows driving LEDs from high
voltage boost converter or separate supply
voltage.The MAIN and SUB outputs are high
resolution current mode drivers. Keypad LED outputs
can be used in switch mode and current mode.
External PWM control can be used for any selected …
