NCP5007 ON Semiconductor, NCP5007 Datasheet
NCP5007
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NCP5007 Summary of contents
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NCP5005 Compact Backlight LED Boost Driver The NCP5005 is a high efficiency boost converter operating in current loop, based on a PFM mode, to drive White LED. The current mode regulation allows a uniform brightness of the LEDs. The chip ...
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V bat GND GND 3 FB NCP5005 R1 D6 GND 15 W LWT67C Figure 1. Typical Application Thermal Shutdown 4 EN 100 k GND − 300 k +200 mV Band Gap Figure 2. ...
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PIN FUNCTION DESCRIPTION Pin Pin Name Type 1 V POWER out 2 GND POWER 3 FB ANALOG INPUT 4 EN DIGITAL INPUT 5 V POWER bat NCP5005 Description This pin is the power side of the external inductor and must ...
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MAXIMUM RATINGS Rating Power Supply Output Power Supply Voltage Compliance Digital Input Voltage Digital Input Current ESD Capability (Note 1) Human Body Model (HBM) Machine Model (MM) TSOP−5 Package Power Dissipation @ T = +85°C (Note 2) A Thermal Resistance, ...
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ANALOG SECTION (Typical values are referenced to T temperature, unless otherwise noted.) Rating High Level Input Voltage Low Level Input Voltage EN Pull Down Resistor Feedback Voltage Threshold Output Current Stabilization Time Delay following a DC/DC Start−up, = 3.60 V, ...
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Basically, the chip operates with two cycles: Cycle #1: time t1, the energy is stored into the inductor Cycle #2: time t2, the energy is dumped to the load The POR signal sets the flip−flop and the first cycle takes ...
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f(V out bat 1200 3 LED 1000 2 LED 800 5 LED 600 400 200 out bat (V) bat Figure 5. ...
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Output Current Range Set−Up The current regulation is achieved by means of an external sense resistor connected in series with the LED string The current flowing through the LED creates a voltage drop across the sense resistor R1. ...
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Output Load Drive In order to optimize the built−in Boost capabilities, one shall operate the NCP5005 in the continuous output current mode. Such a mode is achieved by using and external reservoir capacitor (see Table 1) across the LED. At ...
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Yield = f mA/L bat out 100 2 LED/ LED/ LED/ LED/ 2.50 3.00 3.50 4.00 4.50 V ...
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NCP5005 TYPICAL OPERATING WAVEFORMS = 22 mH, 5 LED, I Conditions 3 bat out Figure 20. Typical Power Up Response V load Inductor Current = 22 mH, 5 LED, I Conditions 3 ...
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NCP5005 TYPICAL OPERATING WAVEFORMS = 22 mH, 5 LED, I Conditions 3 bat out Figure 22. Typical Inductor Current = 22 mH, 5 LED, I Conditions 3 bat out Figure 23. Typical ...
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NCP5005 TYPICAL OPERATING WAVEFORMS Test Conditions mH mA, V out Figure 24. Typical Output Peak Voltage 92.00 90.00 ESR = 0.3 W 88.00 86.00 84.00 ESR = 1.3 W 82.00 80.00 78.00 3 3.5 ...
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Figure 26. Noise Returned to the Battery Test Conditions 3 bat Figure 27. Relative EMI Over 100 kHz − 30 MHz Bandwidth NCP5005 10 100 FREQUENCY (MHz mA, ...
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TYPICAL APPLICATIONS CIRCUITS Standard Feedback The standard feedback provides a constant current to the LED, independently of the V supply and number of LED bat GND R1 GND 15 W Figure 28. Basic DC Current Mode Operation with Analog Feedback ...
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Average Network R2 PWM 150 k GND NOTE: RC filter R2 and C3 is optional (see text) Figure 29. Basic DC Current Mode Operation with PWM Control To implement such a function, let consider the feedback input as an operational ...
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Digital Control Due to the EN pin, a digitally controlled luminosity can be implemented by providing a PWM signal to this pin (see Figure 31). The output current depends upon the Duty Pulse R1 GND 22 W NOTE: Pulse width ...
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NCP5005 Figure 33. Operation @ PWM = 10 kHz 25% Figure 34. Magnified View of Operation @ PWM = 10 kHz 25% http://onsemi.com 18 PWM V load VFB PWR CLK PWM V load PWR CLK ...
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Figure 35. Output Current as a Function of the Operating Condition Table 1. Recommended Passive Parts Part Manufacturer Ceramic Capacitor 1.0 mF/16 V Ceramic Capacitor 1.0 mF/25 V ...
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Typical LEDs Load Mapping Since the output power is voltage battery limited (see Figure 5), one shall arrange the LED to cope with a specific need. In particular, since the power cannot extend 600 Load D1 LED ...
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J1 VBAT GND J2 GROUND GND V bat ENABLE GND TP2 FB R1 51R Z1 GND GND Note: Use Jumper JP2 to JP3 to adjust the number of LED in the operating string Figure 37. ...
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FIGURES INDEX Figure 1: Typical Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... A 0.05 (0.002) H *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “ ...