器件名称:
74LV4799PW
功能描述:
Timer for NiCd and NiMH chargers
文件大小:
162.32KB 共18页
简 介:
INTEGRATED CIRCUITS 74LV4799 Timer for NiCd and NiMH chargers Product specification Supersedes data of 1998 Apr 07 IC24 Data Handbook 1998 Apr 20 Philips Semiconductors Philips Semiconductors Product specification Timer for NiCd and NiMH chargers 74LV4799 FEATURES applications Wide supply voltage range of 0.9 V to 6 V allows 1 to 4-cell 10 V allowed on special inputs Supports virtually all battery chargers, including switched-mode On-chip timer calculates the actual capacity of the battery by Automatic switch-over to trickle charge after completion of the Can be adjusted for use with different types of batteries: – Charge time: 4 to 16 hours – Discharge time: 15 minutes to 4.7 hours – Self-discharge time: 50 to 100 days charge time measuring the charger time, discharge time and self-discharge time power supplies DESCRIPTION The 74LV4799 is a low-voltage Si-gate CMOS control IC for battery management. It consists of: 17-stage divider 10-stage up/down counter Control logic Integrated precision oscillator (using external timing components) Automatic power-ON reset Scan test facilities Battery charging/full indication output (LED) Battery-low indication output (MOLLI) Open-drain-N outputs for driving the load transistor Battery management with the 74LV4799 is based on the principle of time measurement. It measures the charge time, discharge time and self-discharge time by means of a very accurate on-chip oscillator, a divider and an up/down counter. Ba……
