Datenblatt-Suchmaschine für elektronische Bauteile |
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LM3554 Datenblatt(PDF) 10 Page - Texas Instruments |
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LM3554 Datenblatt(HTML) 10 Page - Texas Instruments |
10 / 43 page LM3554 SNVS549A – JUNE 2009 – REVISED APRIL 2011 www.ti.com Typical Performance Characteristics (continued) VIN = 3.6V, LEDs are Lumiled PWF-4, COUT = 10µF, CIN = 4.7µF, L = FDSE0312-2R2 (2.2µH, RL = 0.15Ω), TA = +25°C unless otherwise specified. Shutdown Current Switching Frequency vs vs VIN VIN (VHWEN = 0V) Active (Non-Switching) Supply Current Active (Switching) Supply Current vs vs VIN VIN (VLED = 1.5V) (VOUT = 5V, IOUT = 400mA) Closed Loop Current Limit Closed Loop Current Limit vs vs VIN VIN (Flash Duration Register bits [6:5] = 00, (2)) (Flash Duration Register bits [6:5] = 01, (2) ) (2) The typical curve for Over-Voltage Protection (OVP) is measured in closed loop using the typical application circuit . The OVP value is found by forcing an open circuit in the LED1 and LED2 path and recording the peak value of VOUT. The value given in the Electrical Table is found in an open loop configuration by ramping the voltage at OUT until the OVP comparator trips. The closed loop data can appear higher due to the stored energy in the inductor being dumped into the output capacitor after the OVP comparator trips. At worst case is an open circuit condition where the output voltage can continue to rise after the OVP comparator trips by approximately IIN×sqrt(L/COUT). 10 Submit Documentation Feedback Copyright © 2009–2011, Texas Instruments Incorporated Product Folder Links: LM3554 |
Ähnliche Teilenummer - LM3554_14 |
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Ähnliche Beschreibung - LM3554_14 |
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