LM2794TLX National Semiconductor, LM2794TLX Datasheet
LM2794TLX
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LM2794TLX Summary of contents
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... SD pin is low, and the LM2795 is shut down when the SD pin is high. The LM2794/95 is available in a micro SMD-14 CSP pack- age. Basic Application Circuit © 2004 National Semiconductor Corporation Features n Regulated current sources with between any two outputs n High efficiency 3/2 boost function n Drives one, two, three or four white LEDs n 2 ...
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... Shutdown Polarity LM2794BL Active Low LM2794BLX Active Low LM2795BL Active High LM2795BLX Active High Thin Micro SMD Package: Order Number Shutdown Polarity LM2794TL Active Low LM2794TLX Active Low LM2795TL Active High LM2795TLX Active High Pin Description Pin(*) Name A1 C1+ B2 C1− C1 ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications BRGT Continuous Power Dissipation (Note 2) T (Note 2) JMAX Electrical Characteristics Limits in standard typeface are for T J Range (−30˚C ≤ T ≤ +100˚C). Unless otherwise specified =124Ω ...
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Electrical Characteristics Limits in standard typeface are for T Range (−30˚C ≤ T ≤ +100˚C). Unless otherwise specified =124Ω ; LM2794 (LM2795 Symbol Parameter f Switching Frequency (Note 6) ...
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Typical Performance Characteristics V = 3.6V, BRGT pin = 0V 124Ω. IN SET DIODE DIODE IN BRGT = DIODE SET BRGT Unless otherwise specified, ...
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Typical Performance Characteristics = 3.6V, BRGT pin = 0V 124Ω. (Continued) SET SET BRGT R = 1KΩ SET Supply Current 1-4 = 15mA DIODE Shutdown Supply Current vs V www.national.com Unless otherwise ...
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Typical Performance Characteristics = 3.6V, BRGT pin = 0V 124Ω. (Continued) SET Start-Up Response @ V = 2.7V (LM2794) IN Start-Up Response @ V = 3.6V (LM2794) IN Start-Up Response @ V = 4.2V (LM2794) IN Unless otherwise ...
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Typical Performance Characteristics = 3.6V, BRGT pin = 0V 124Ω. (Continued) SET Available Additional Current I 1− 15mA, R DIODE www.national.com Unless otherwise specified OUT = 124 Ω SET ...
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Functional Block Diagram Application Information CIRCUIT DESCRIPTION The LM2794 1.5x/1x CMOS charge pump with four matched constant current outputs, each capable of driving up to 20mA through White LEDs. This device operates over the extended Li-Ion battery range ...
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Application Information SHUTDOWN MODE The shutdown pin (SD) disables the part and reduces the quiescent current to 2.3µA (typ.). The LM2795 has an active-high shutdown pin (HIGH = shutdown, LOW = operating). An internal pull-up is con- nected between SD ...
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... OUT usually practical only with a fixed input voltage. If the input voltage is not fixed (Li-Ion battery, for example), using a linear regulator between the P required or recommended. National Semiconductor’s LP3985-4.5V low- SET . dropout linear regulator is a good choice for such an appli- SET cation. ...
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Application Information Output resistance results in droop in the P portional to the amount of current delivered by the pump. The P voltage is an important factor in determining the OUT total output current capability of an application. Taking total ...
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Application Information OUTPUT CURRENT CAPABILITY The primary constraint on the total current capability is the headroom voltage requirement of the internal current sources. Combining the V and V POUT HR previous two sections yields the basic inequality for deter- mining ...
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Application Information ÷ P LED Efficiency, as defined here part dependent on LED voltage. Variation in LED voltage does not affect power consumed by the circuit and typically does not relate to the brightness of ...
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Physical Dimensions inches (millimeters) unless otherwise noted For Ordering, Refer to Ordering Information Table Standard Micro SMD Package NS Package Number BLP14EHB The dimensions for X1, X2, X3 are given as: ± 2.098mm 0.030mm ± 2.403mm ...
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... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...