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74LV4799PWDH Arkusz danych(PDF) 2 Page - NXP Semiconductors |
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74LV4799PWDH Arkusz danych(HTML) 2 Page - NXP Semiconductors |
2 / 18 page Philips Semiconductors Product specification 74LV4799 Timer for NiCd and NiMH chargers 2 1998 Apr 20 853-2058 19258 FEATURES • Wide supply voltage range of 0.9 V to 6 V allows 1 to 4-cell applications • 10 V allowed on special inputs • Supports virtually all battery chargers, including switched-mode power supplies • On-chip timer calculates the actual capacity of the battery by measuring the charger time, discharge time and self-discharge time • Automatic switch-over to trickle charge after completion of the charge time • 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 • Battery status indication included: – LED output for charging/full indication – MOLLI output for battery-low indication • LED mode select allows two different methods of indication • Automatic power-ON reset • Low-power consumption • Requires only a few peripheral components • Very accurate on-chip oscillator • Scan test facilities included • I CC category: non-standard. APPLICATIONS • Time-controlled NiCd and NiMH low-current chargers • Domestic appliances such as rechargeable battery shavers, electric toothbrushes etc. • Portable equipment such as notebook PCs, laptop PCs, camera flash units etc. • Personal communications like cordless telephones, personal mobile radios, pagers, etc. 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. PIN CONFIGURATION SV01643 1 2 3 4 5 6 LED EN EN Vin PWRS MOLLI/SCO VCC SCI SCAN 16 15 14 13 12 11 7 8 GND RC DIS 10 9 SEL IOSC RS RD QUICK REFERENCE DATA GND = 0V; Tamb = 25°C SYMBOL PARAMETER CONDITIONS TYPICAL TYPICAL TYPICAL UNIT VCC DC supply voltage 0.9 6.0 V ICC Operating supply current VCC = 3.3V; self-discharge mode; Rs = 100 kW; C1 = 220nF 36 µA Df Oscillator frequency tolerance VCC = 1 to 6 V 7 % ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA CODE 16-Pin Plastic DIL 0 °C to +70°C 74LV4799 N 74LV4799 N SOT38-4 16-Pin Plastic SO 0 °C to +70°C 74LV4799 D 74LV4799 D SOT109-1 16-Pin Plastic SSOP Type II 0 °C to +70°C 74LV4799 DB 74LV4799 DB SOT338-1 16-Pin Plastic TSSOP Type I 0 °C to +70°C 74LV4799 PW 74LV4799PW DH SOT403-1 |
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Podobny opis - 74LV4799PWDH |
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