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UC3846 Fiches technique(PDF) 4 Page - Texas Instruments |
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UC3846 Fiches technique(HTML) 4 Page - Texas Instruments |
4 / 8 page Note 2. These parameters, although guaranteed over the recommended operating conditions, are not 100% tested in production. Note 3. Parameter measured at trip point of latch with VPIN 5 = VREF, VPIN 6 = 0V. Note 4. Amplifier gain defined as: G = ∆ VPIN 7 ∆ VPIN 4 ; ∆ VPIN 4 = 0 to 1.0V. Note 5. Applies to UC1846/UC2846/UC3846 only due to polarity of outputs. Note 6. Current into Pin 1 guaranteed to latch circuit in shutdown state. Note 7. Current into Pin 1 guaranteed not to latch circuit in shutdown state. UC1846/7 UC2846/7 UC3846/7 UC1846/UC1847 UC3846/UC3847 PARAMETER TEST CONDITIONS UC2846/UC2847 MIN. TYP. MAX. MIN. TYP. MAX. UNITS Shutdown Terminal Section (cont.) Maximum Non-Latching (Note 7) Current (IPIN 1) 1.5 0.8 1.5 0.8 mA Delay to Outputs TJ=25°C (Note 2) 300 600 300 600 ns Output Section Collector-Emitter Voltage 40 40 V Collector Leakage Current VC=40V (Note 5) 200 200 µA Output Low Level ISINK=20mA 0.1 0.4 0.1 0.4 V ISINK=100mA 0.4 2.1 0.4 2.1 V Output High Level ISOURCE=20mA 1313.5 1313.5 V ISOURCE=100mA 12 13.5 12 13.5 V Rise Time CL=1nF, TJ=25°C (Note 2) 50 300 50 300 ns Fall Time CL=1nF, TJ=25°C (Note 2) 50 300 50 300 ns Under-Voltage Lockout Section Start-Up Threshold 7.7 8.0 7.7 8.0 V Threshold Hysteresis 0.75 0.75 V Total Standby Current Supply Current 17 21 17 21 mA Oscillator Circuit Output deadtime is determined by the external capacitor, CT, according to the formula: τd (µs) = 145CT (µf ) ID ID − 3.6 RT (k Ω) . For large values of RT: τd (µs) ≈ 145CT (µf ). Oscillator frequency is approximated by the formula: fT (kHz) ≈ 2.2 RT (k Ω)• CT (µf ) . ELECTRICAL CHARACTERISTICS (cont.) (Unless otherwise stated, these specifications apply for TA=-55°C to +125°C for UC1846/7; -40°C to +85°C for the UC2846/7; and 0°C to +70°C for the UC3846/7; VIN=15V, RT=10k, CT=4.7nF, TA=TJ.) APPLICATIONS DATA ID = Oscillator discharge current at 25°C is typically 7.5. 4 |
Numéro de pièce similaire - UC3846 |
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Description similaire - UC3846 |
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