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74LV4799N Arkusz danych(PDF) 9 Page - NXP Semiconductors |
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74LV4799N Arkusz danych(HTML) 9 Page - NXP Semiconductors |
9 / 18 page Philips Semiconductors Product specification 74LV4799 Timer for NiCd and NiMH chargers 1998 Apr 20 9 AC CHARACTERISTICS GND = 0V; tr = tf ≤ 2.5ns; CL = 50pF TEST CONDITIONS Tamb (°C) SYMBOL PARAMETER TEST CONDITIONS +25 0 to +70 UNIT VCC(V) MIN TYP MAX MIN MAX ∆f Oscillator frequency spread 1.0 Any resistor or capacitor according to –11 –4 +3 % ∆f Oscillator frequency s read 6.0 yg the application information, see note 1 –9 –2 +5 % δLED Duty factor at pin 1 1.0 See Note 2 – 50 % δLED Duty factor at in 1 6.0 See Note 2 – 50 % δMOLLI Duty factor at pin 6 1.0 See Note 3 – 50 % δMOLLI Duty factor at in 6 6.0 See Note 3 – 50 % tdb Debounce suppression at pin 9 1.0 – 67 ms tdeb Debounce su ression at in 9 6.0 – 65 ms fi( ) Maximum frequency at power 1.0 100 kHz fi(max) qy sense input 6.0 100 kHz fi( i ) Minimum frequency at power 1.0 50 Hz fi(min) qy sense input 6.0 50 Hz NOTES: 1. The oscillator frequency can be calculated by: f + 0.36 R C1 2. During blinking. 3. An output signal of four periods will appear in case of discharged batteries and DIS is switched HIGH. APPLICATION INFORMATION Oscillator. The frequency will be determined by the external components RC, RD, RS, and C1. The frequencies can be calculated by the following expressions: f + 0.36 R C C1 ; f + 0.36 R D C1 ; f + 0.36 R S C1 . RC and C1 determine the charge time. RD and C1 determine the discharge time. RS and C1 determine the self-charge time. The charge, discharge and self-discharge times can be calculated as follows: Charge time + 2 22 f C ; Discharge time + 2 18 f D ; Self-discharge time + 2 27 f S In the trickle charge mode, the average charge current will be reduced by a factor: 1 1 ) 3x R S 4x R C External components range TEST CONDITIONS Tamb (°C) SYMBOL PARAMETER TEST CONDITIONS +25 UNIT VCC(V) V1 OTHER MIN TYP MAX 1.0 5.360 100 k W RC/RD Resistor range 2.0 C1=0 22 µF 1.150 100 k W RC/RD Resistor range 4.5 C1 = 0.22 µF 0.562 100 k W 6.0 0.511 100 k W 1.0 42.20 825 k W RS Resistor range 2.0 C1=0 22 µF 9.09 825 k W RS Resistor range 4.5 C1 = 0.22 µF 4.22 825 k W 6.0 3.32 825 k W 1.0 no limit pF C1 Capacitor range 2.0 no limit F C1 Ca acitor range 4.5 no limit pF 6.0 no limit F |
Podobny numer części - 74LV4799N |
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Podobny opis - 74LV4799N |
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