LM3553SDX-HALF NSC [National Semiconductor], LM3553SDX-HALF Datasheet
LM3553SDX-HALF
Related parts for LM3553SDX-HALF
LM3553SDX-HALF Summary of contents
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LM3553 1.2A Dual Flash LED Driver System with I Interface General Description The LM3553 is a fixed frequency, current mode step-up DC/ DC converter with two regulated current sinks. The device is capable of driving loads up to 1.2A from ...
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... Hardware RESET or General purpose I/O. Function set through Multi-Function Control Register Ordering Information Order Number Type LM3553SD-NOPB No Lead, Non- Halogenated LM3553SDX-NOPB No Lead, Non- Halogenated LM3553SD-HALF No Lead, Halogenated LM3553SDX-HALF No Lead, Halogenated www.national.com Function Package Package Marking SDF12A L3553 SDF12A L3553 SDF12A L3553 SDF12A ...
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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. V pin: Voltage to GND IN SW, OVP pin: Voltage to GND D1, D2 pins: Voltage to GND VIO, ...
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Symbol Parameter f Switching Frequency SW t Minimum Flash Duration Step t FD-MIN D Maximum Duty Cycle MAX D Minimum Duty Cycle MIN Th TX, F Pin Threshold TX,F-EN EN Multi-Function Pin (M/F) Voltage Specifications Multi-Function Pin Threshold V M/F ...
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Note 8: Min and Max limits are guaranteed by design, test, or statistical analysis. Typical (Typ) numbers are not guaranteed, but do represent the most likely norm. Unless otherwise specified, conditions for Typ specifications are: V Note 9: All testing ...
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Typical Performance Characteristics R = 16.5kΩ 10µ 10µF;L = 2.2µH; VFB bit = CL bit = '0'; OVP bit = '0' for 1 LED and VFB = '1' for two series SET IN OUT LEDs;. Maximum ...
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Input Current and LED Efficiency with 1.2A Flash Current Input Current and LED Efficiency with 600mA Flash Current through 2 Series LEDs LED Efficiency LED @ 1.2A and 2 LEDs @ 600mA Input Current and LED ...
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Block Diagram Circuit Description CIRCUIT COMPONENTS F Pin EN The flash enable pin provides an external method (non for starting the flash pulse. When F '1', the flash current level defined through the I2C ...
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Connection Diagram Typical System Configuration Compatible Interface DATA VALIDITY The data on SDA line must be stable during the HIGH period of the clock signal (SCL). In other words, the state of the data line can only ...
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COMPATIBLE CHIP ADDRESS The chip address for LM3553 is 1010011, or 53hex. FIGURE 4. INTERNAL REGISTERS OF LM3553 Register Internal Hex Address General Purpose Register 0x10 Multi-Function Pin Control 0x20 Register Current Step Time 0x50 Register Torch ...
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Torch Current Control Register FIGURE 8. TC6-TC0: Sets Torch current level for D1 and D2. xxx1 1111 = Fullscale Flash Current Control Register FIGURE 9. FC6-FC0: Sets Flash current level for D1 and D2. x111 1111 = Fullscale Current Level ...
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Safety Timer Terminated Pulse TX Terminated Pulse Application Information INDUCTOR SELECTION The LM3553 is designed to use a 2.2µH inductor. When the device is boosting (V > the inductor is one of the OUT IN biggest sources of ...
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Connect the inductor and the anode of D1(schottky) as close together as possible and place this connection as close as possible to the SW pin. This reduces the inductance and resistance of the switching node which minimizes ringing and ...
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LM3553 CONFIGURATIONS www.national.com 2 LEDs @ 600mA with Battery Input 1 LED @ 1.2A with Battery Input 14 20171415 20171437 ...
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LEDs @ 1.2A with +5V Input Voltage Mode @ 700mA with Battery Input 15 20171439 20171438 www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted NS Package SDF12A 16 ...
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Notes 17 www.national.com ...
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