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CS3845GDWR16 Fiches technique(PDF) 4 Page - ON Semiconductor |
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CS3845GDWR16 Fiches technique(HTML) 4 Page - ON Semiconductor |
4 / 12 page CS2844, CS3844, CS2845, CS3845 http://onsemi.com 4 ELECTRICAL CHARACTERISTICS (continued) (–25 ° ≤ TA ≤ 85° for CS2844/2845, 0° ≤ TA ≤ 70° for CS3844/CS3845. VCC = 15 V*; RT = 10 kΩ, CT = 3.3 nF for sawtooth mode; unless otherwise stated.) CS2842A/CS2843A CS3842A/CS3843A Characteristic Test Conditions Min Typ Max Min Typ Max Unit Error Amp Section Input Voltage VCOMP = 2.5 V 2.45 2.50 2.55 2.42 2.50 2.58 V Input Bias Current VFB = 0 – –0.3 –1.0 – –0.3 –2.0 µA AVOL 2.0 ≤ VOUT ≤ 4.0 V 65 90 – 65 90 – dB Unity Gain Bandwidth Note 4. 0.7 1.0 – 0.7 1.0 – MHz PSRR 12 ≤ VCC ≤ 25 V 60 70 – 60 70 – dB Output Sink Current VFB = 2.7 V, VCOMP = 1.1 V 2.0 6.0 – 2.0 6.0 – mA Output Source Current VFB = 2.3 V, VCOMP = 5.0 V –0.5 –0.8 – –0.5 –0.8 – mA VOUT High VFB = 2.3 V, RL = 15 kΩ to GND 5.0 6.0 – 5.0 6.0 – V VOUT Low VFB = 2.7 V, RL = 15 kΩ to VREF – 0.7 1.1 – 0.7 1.1 V Current Sense Section Gain Notes 5 & 6. 2.85 3.00 3.15 2.85 3.00 3.15 V/V Maximum Input Signal VCOMP = 5.0 V. Note 5. 0.9 1.0 1.1 0.9 1.0 1.1 V PSRR 12 ≤ VCC ≤ 25 V. Note 5. – 70 – – 70 – dB Input Bias Current VSENSE = 0 – –2.0 –10 – –2.0 –10 µA Delay to Output TJ = 25°C. Note 4. – 150 300 – 150 300 ns Output Section Output Low Level ISINK = 20 mA ISINK = 200 mA – – 0.1 1.5 0.4 2.2 – – 0.1 1.5 0.4 2.2 V V Output High Level ISOURCE = 20 mA ISOURCE = 200 mA 13 12 13.5 13.5 – – 13 12 13.5 13.5 – – V V Rise Time TJ = 25°C, CL = 1.0 nF. Note 4. – 50 150 – 50 150 ns Fall Time TJ = 25°C, CL = 1.0 nF. Note 4. – 50 150 – 50 150 ns Total Standby Current Startup Current – – 0.5 1.0 – 0.5 1.0 mA Operating Supply Current VFB = VSENSE = 0 V, RT = 10 kΩ, CT = 3.3 nF – 11 17 – 11 17 mA VCC Zener Voltage ICC = 25 mA – 34 – – 34 – V PWM Section Maximum Duty Cycle – 46 48 50 46 48 50 % Minimum Duty Cycle – – – 0 – – 0 % 4. These parameters, although guaranteed, are not 100% tested in production. 5. Parameters measured at trip point of latch with VFB = 0. 6. Gain defined as: A = ∆VCOMP/∆VSENSE; 0 ≤ VSENSE ≤ 0.8 V. *Adjust VCC above the start threshold before setting at 15 V. |
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