¡¤Efficient asynchronous boost converter for driving up to 6 white LEDs
¡¤2.7 V to 5.5 V input voltage range
¡¤128 programmable backlight LED current levels (30 mA maximum)
¡¤Ambient light sensing with autonomous backlight adjustment
¡¤Programmable backlight fade-in/fade-out times
¡¤Programmable backlight dim and off times
¡¤8 configurable GPIO pins (input, output, up to 4 ¡Á 4 keypad)
¡¤Up to 3 auxiliary LED current sinks (1 dedicated, 2 configurable)
¡¤64 programmable auxiliary LED current levels (14 mA maximum)
¡¤Programmable auxiliary LED fade-in/fade-out times
¡¤Programmable auxiliary LED on and off times (allows blinking)
¡¤See data sheet for additional features
Application
Display backlight driver for phones that require slider or flip, keypad functions with single or multiple LED indicators
Briefing
Displays found in portable electronics require a lot of battery power and with consumers favoring larger screens and higher quality screens for viewing image-rich content, the power efficiency of the display system becomes an increasingly important design consideration. The Analog Devices, Inc. (NYSE: ADI) ADP5520 lighting management system is a power-efficient, customizable display management solution designed to improve viewing quality and extend battery life in mobile phones, personal navigation devices and media players, for example.
The single-chip ADP5520 lighting management system enables a 20-percent reduction in battery power consumption through the use of an ¡°intelligent¡± lighting-control that automatically detects ambient light levels and adjusts backlight brightness according to changing lighting environments. An adaptive ambient light management feature adjusts too-bright or washed-out screens autonomously according to configurable lighting profiles. This reduces current-drain and extends battery life by minimizing the processor involvement in backlight monitoring. In addition, the ADP5520 can assume control of key-scan and general-purpose I/O sub-system functions from the processor, further reducing system power consumption and increasing available processor bandwidth.
Using this highly integrated lighting management system, designers of ¡°flip¡± or slider form factor phones can reduce the number of control lines running across the hinge of a phone from 53 lines down to 14. This brings significant cost and reliability benefits to flip phones or slider phones in which the backlighting system is located alongside the LCD display. In a typical mobile handset application, the ADP5520 integrates the keypad controls, lighting sensor, LED indicators, and backlight LED supply on a single chip, and also features programmable profiles with minimum software overhead to control LED backlight intensity, on/off timing, fade algorithm cubic (or square law), and dimming timers.
¡¤Wide Parallel Supply Voltage Range: 1.60 to 3.0V
¡¤Low Power Core Operation: VDDS/A=2.5 to 3.0V
¡¤Voltage Translation Capability Across Pair with No External Components
¡¤High ESD Protection: >15kV IEC 61000
¡¤Available in BGA and MLP packages
Product Feature
¡¤Ultra-Low Operating Power: ~4mA at 5.44MHz
¡¤Supports Dual-Display Implementations with RGB or Microcontroller Interface
¡¤SPI Mode Support
Application
¡¤Single or Dual 16/18-Bit RGB Cell Phone Displays
¡¤Single or Dual 16/18-Bit Cell Phone Displays with Microcontroller Interface
¡¤Single or Dual Mobile Display at QVGA or HVGA Resolution
Briefing
The FIN324C is a 24-bit serializer / deserializer with dual strobe inputs. The device can be configured as a master or slave device through the master/slave select pin (M/S). This allows for the same device to be used as either a serializer or deserializer, minimizing component types in the system. The dual strobe inputs allow implementation of dual-display systems with a single pair of SerDes. The FIN324C can accommodate RGB, microcontroller, or SPI mode interfaces. Read and write transactions are supported when operating with a microcontroller interface for one or both displays. Unlike other SerDes solutions, no external timing reference is required for operation.
The FIN324C is designed for ultra-low power operation. Reset (/RES) and standby (/STBY) signals put the device in an ultra-low power state. In standby mode, the outputs of the slave device maintain state, allowing the system to resume operation from the last-known state.
The device utilizes Fairchild¡¯s proprietary ultra-low power, low-EMI Current Transfer Logic (CTL) technology. The serial interface disables between transactions to minimize EMI at the serial interface and to conserve power. CMOS parallel output buffers have been implemented with slew rate control to adjust for capacitive loading and to minimize EMI.
¡¤10¦ÌA Maximum ICCT over an Expanded Voltage Range (VIN=2.6V, VCC=4.3V)
¡¤Wide -3db Bandwidth: > 720MHz
¡¤Packaged in Space-Saving 28-Lead UMLP
¡¤5.5kV ESD Rating; >9kV Power/GND ESD Rating
Product Feature
¡¤Low On Capacitance: 6pF Typical
¡¤Low COFF Capacitance: 2.0pF Typical
¡¤Low On Resistance: 7.5¦¸ Typical
¡¤Low Power Consumption: 1¦ÌA Maximum
Application
¡¤Cell phone, PDA, Digital Camera, and Notebook
¡¤LCD Monitor, TV, and Set-Top Box
Briefing
Fairchild Semiconductor (NYSE: FCS) brings designers of 3G smartphones, netbooks, set-top boxes and notebooks the industry¡¯s first image module switch that isolates parasitic components to maintain signal integrity. The FSA1211 is a 12-port, single pole, single throw (SPST) analog switch that isolates the high speed bus from parasitic components in dual camera applications. Smartphones feature dual cameras and as these cameras move to higher and higher resolutions, parasitic components play a critical role in deteriorating signals and generating unwanted EMI.
With a bandwidth in excess of 720MHz and high ESD (5.5 kV), the FSA1211 offers an optimal way to isolate capacitance and maintain signal integrity for high speed data paths. In addition, when isolating the unused parallel interface, the FSA1211 reduces the radiated EMI of the path, improving RF desense. The traditional parallel solution can deteriorate the signal due to the unwanted ¡°stub,¡± resulting in image degradation of the camera module. Another approach is to use three analog switches, which complicates design and adds to the overall bill of material (BOM) costs. In contrast, the FSA1211 offers robust isolation and ease of design at a lower cost.
Single-Wire Control Bus
High speed single wire bus carrying all control commands
Power Management
low-power 1.2V and 1.8V cores
Flexible power-down modes
Package
64-ball BGA (5mm x 5mm footprint)
Operating Range
-20C¡ã to +85C¡ã extended temperature support
Product Feature
The Silicon Image SiI9222 is an ultra low-power MHL transmitter designed for power-sensitive consumer electronics devices such as mobile phones, digital cameras, portable media players, HD camcorders and other portable devices. Together with its companion MHL HDMI bridge, the SiI9222 delivers a low-cost, low-pin count, HDMI-interoperable HDTV connectivity solution to mobile electronics world.
Application
Mobile Phones/Cameras , Portable Multimedia Players
Briefing
¡¾SII - SiI9290¡¿
Product Spec
Compliance
HDMI*
DVI 1.0*
Simplay HD
HDCP 1.2*
With companion MHL Transmitter
Digital Video Output
Integrated TMDS core
- HDMI Output ¨C Four differential pairs, 1 clock and 3 data
DTV resolution support - 480i/576i/480p/576p/720p/1080i
PC resolution support - VGA/XGA/SXGA
HDMI compliant DDC and CEC signals
Digital Video Input
Integrated TMDS core
- MHL Input - Two differential pairs, one clock and 1 data
Single-Wire Control Bus
High speed single wire bus carrying all HDMI DDC and CEC commands
CE Control (CEC)
Dedicated CEC signal output
Integrated hardware arbitration logic offloads local CPU overhead
MHL Transcode Engine
Integrated hardware logic automatically convert MHL audio/video packets to HDMI compliant audio/video packets
Integrated decoding logic transcode MHL control bus commands to HDMI compliant
DDC and CEC commands
Power Management
1.8V and 3.3V cores for low-power operation
Flexible power-down modes
Package
48-pin LQFP (7mm x 7mm footprint)
Operating Range
0C¡ã to +70C¡ã temperature support
Product Feature
The SiI9290 is an ultra low BOM cost bridge designed to transcode MHL audio/video packets and control bus commands to HDMI compliant output signals for DTV connectivity. Together with its companion MHL transmitters, the SiI9290 delivers a low cost, high-definition, low pin count, HDMI-compliant DTV connectivity solution to the mobile electronics world.
WPG Components Buying Guide
