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LM3204 bảng dữ liệu(PDF) 5 Page - Texas Instruments |
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LM3204 bảng dữ liệu(HTML) 5 Page - Texas Instruments |
5 / 24 page LM3204 www.ti.com SNVS351C – JUNE 2005 – REVISED APRIL 2013 SYSTEM CHARACTERISTICS The following spec table entries are specified by design if the component values in the typical application circuit are used. These parameters are not specified by production testing. Symbol Parameter Conditions Min Typ Max Units TRESPONSE Time for VOUT to Rise from VIN = 4.2V, COUT = 4.7µF, 0.8V to 3.4V in PWM Mode RLOAD = 15Ω 25 µs L = 2.2 µH (ISAT > 0.94A) TSTARTUP Time for VOUT to rise to 3.4V VIN = 4.2V, COUT = 4.7µF, in PWM Mode RLOAD = 15Ω 50 µs (1) L = 2.2µH (ISAT = 0.94A) EN = Low to High CCON VCON Input Capacitance VCON = 1V, 15 pF Test frequency = 100kHz TON_BYP Bypass FET Turn On Time In VIN = 3.6V, VCON = 0.267V, Bypass Mode COUT = 4.7µF, RLOAD = 15Ω 30 µs BYP = Low to High TBYP Auto Bypass Detect Delay (2) 10 15 20 µs Time (1) The startup time is the time to reach 90% of 3.4V nominal output voltage from the EN being low to high. (2) VIN is compared to the programmed output voltage (VOUT). When VIN–VOUT falls below VBYPASS− for longer than TBYP the Bypass FET turns on and the switching FETs turn off. This is called the Bypass mode. The device comes out of Bypass mode when VIN–VOUT exceeds VBYPASS + for longer than T BYP, and PWM mode returns. The hysteresis for the bypass detection threshold VBYPASS + – VBYPASS− will always be positive and will be approximately 200mV (typ.). Copyright © 2005–2013, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3204 |
Số phần tương tự - LM3204_16 |
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Mô tả tương tự - LM3204_16 |
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