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UC2844D Fiches technique(PDF) 4 Page - STMicroelectronics |
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UC2844D Fiches technique(HTML) 4 Page - STMicroelectronics |
4 / 11 page Notes : 2. These parameters, although guaranteed, are not 100% tested in production. 3. Parameter measured at trip point of latch with VPIN2 =0. 4. Gain defined as : ∆ VPIN1 A= ; 0 ≤ VPIN3 ≤ 0.8 V ∆ VPIN3 5. Adjust Vi above the start threshold before setting at 15 V. 6. Output frequency equals oscillator frequency for the UC3842 and UC3843. Output frequency is one half oscillator frequency for the UC3844 and UC3845. ELECTRICAL CHARACTERISTICS (continued) Symbo l Parameter T est Cond ition s UC284X UC384X Unit Min. T yp. Max. Min. T yp. Max. UNDER-VOLTAGE LOCKOUT SECTION Start Threshold X842/4 15 16 17 14.5 16 17.5 V X843/5 7.8 8.4 9.0 7.8 8.4 9 V Min Operating Voltage After Turn-on X842/4 9 10 11 8.5 10 11.5 V X843/5 7.0 7.6 8.2 7.0 7.6 8.2 V PWM SECTION Maximum Duty Cycle X842/3 93 97 100 93 97 100 % X844/5 46 48 50 47 48 50 % Minimum Duty Cycle 0 0 % TOTAL STANDBY CURRENT Ist Start-up Current 0.5 1 0.5 1 mA Ii Operating Supply Current VPIN2 =VPIN3 =0V 11 20 11 20 mA Viz Zener Voltage Ii = 25mA 34 34 V UC2842/3/4/5-UC3842/3/4/5 4/11 |
Numéro de pièce similaire - UC2844D |
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Description similaire - UC2844D |
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