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Vishay Siliconix Releases New 20-V and 30-VP-Channel Power MOSFETs With Industry’s Lowest On-Resistance

Vishay Siliconix Releases New 20-V and 30-VP-Channel Power MOSFETs With Industry’s Lowest On-Resistance

The devices will be used as the adaptor switch and for load switching applications in notebook computers and industrial/general systems. Adaptor switches (switching between the adaptor/wall power and the battery power) are always on and drawing current. The lower on-resistance of the Si7135DP and Si7633DP translates into lower power consumption, saving power and prolonging battery life between charges. [Read more...]

Power Management TLC5924 16 Channel LED Driver With DOT Correction and Pre-Charge FET

19.09.2006 21:30 - Source: Texas Instruments

Features

16 Channels
Drive Capability
- 0 to 80 mA (Constant–Current Sink)
Constant Current Accuracy: ±1% (typical)
Serial Data Interface
Fast Switching Output: T_r / T_f = 10ns (typical)
CMOS Level Input/Output
30 MHz Data Transfer Rate
V_CC = 3.0 V to 5.5 V
Operating Temperature = –40°C to 85°C
LED Supply Voltage up to 17 V
32–pin HTSSOP(PowerPAD) and QFN Packages
Dot Correction
- 7 bit (128 Steps)
- individual adjustable for each channel
Controlled In–Rush Current
Pre–Charge FET
Error Information
- LOD: LED Open Detection
- TEF: Thermal ErrorFlag
APPLICATIONS
- Monocolor, Multicolor, Fullcolor LED Display
- Monocolor, Multicolor LED Signboard
- Display Backlighting
- Multicolor LED lighting applications

PowerPAD is a trademark of Texas Instruments.

Description

The TLC5924 is a 16 channel constant–current sink driver. Each channel has a On/Off state and a 128–step adjustable constant current sink (dot correction). The dot correction adjusts the brightness variations between LED, LED channels and other LED drivers. Both dot correction and On/Off state are accessible via a serial data interface. A single external resistor sets the maximum current of all 16 channels.

Each constant–current output has a pre–charge FET that enables an improvement in image quality of the dynamic–drive LED display.

The TLC5924 features two error information circuits. The LED open detection (LOD) indicates a broken or disconnected LED at an output terminal. The thermal error flag (TEF) indicates an over–temperature condition.

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