NJU6043 JRC, NJU6043 Datasheet
NJU6043
Related parts for NJU6043
NJU6043 Summary of contents
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... General Description The NJU6043 is a high efficiency white LED driver with low input voltage PWM type DC/DC converter. The typical output current is 20 mA. Because the switching frequency is about 1 MHz, so tiny parts such as inductor and capacitor can be used to save space. The NJU6043 is suitable for portable electronic applications such as cell phone, digital still camera, or PDA etc ...
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... Power Supply Power supply pin DD Function Description (1) Operation Description (1-1) LED Current Control Circuit The NJU6043 is a step-up switching regulator. The LED current I connect FB pin and Vss pin, vice versa, R determined the reference voltage to the non-inverting pin of the error comparator. REF ...
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... Application Information (2-1) Inductor Selection A 4.7µF inductor is recommended for the NJU6043 applications. Because of the inrush current. the saturation current rating of the inductor shall be higher enough than the current limit. And the inductor with low core losses and small DCR (cooper wire resistance) shall be used to gain a high efficiency. ...
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... NJU6043 www.DataSheet4U.com Absolute Maximum Ratings Parameter Power Supply SHDNb Pin Voltage OVP Pin Voltage SW Pin Voltage FB Pin Voltage Power Dissipation Storage Temperature Operating Temperature Note): Stress beyond those listed under “Absolute Maximum Rating” may cause permanent damage to the device. DC Characteristics ...
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... Typical Performance Stability for Driving 5 WLEDs Stability for Driving 3 WLEDs Inrush Current for Driving 5 WLEDs Ver.2006-06-27 Preliminary (V =3.6V Stability for Driving 4 WLEDs Stability for Driving 2 WLEDs Inrush Current for Driving 4 WLEDs NJU6043 =0V, L=4.7uH, Ta= ...
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... NJU6043 www.DataSheet4U.com Inrush Current for Driving 3 WLEDs OVP Waveform - 6 - Preliminary (V =3.6V Inrush Current for Driving 2 WLEDs Dimming Control for Driving 4 WLEDs =0V, L=4.7uH, Ta= Ver.2006-06-27 ...
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... Input Voltage (V) Ver.2006-06-27 Preliminary V =4.2V IN 5LEDs, C =1µ =3.6V V =4. 3LEDs, C =1µ 4.5 5 5.5 6 NJU6043 (V =3.6V, V =0V, L=4.7uH, Ta= Efficiency vs. Load Current =2. =3. 4LEDs Load Current (mA) Efficiency vs. Load Current ...
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... NJU6043 www.DataSheet4U.com Frequency vs. Input Voltage 1 0.95 0.9 0.85 0.8 0.75 0.7 2 2.5 3 3.5 4 Input Voltage (V) OVP Trigger Threshold vs. Input Voltage 21 20.5 20 19.5 19 18 2.5 3 3.5 4 Input Voltage (V) OVP Release Threshold vs. Input Voltage 17 16.5 16 15.5 15 14 2.5 3 3.5 4 Input Voltage ( Preliminary 4.5 5 5.5 6 4.5 5 5.5 6 4 =3.6V, V =0V, L=4.7uH, Ta= Frequency vs. Temperature 1 ...
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... OVP Pin Input Current vs. Input Voltage 2.5 3 3.5 4 Input Voltage (V) Ver.2006-06-27 Preliminary 4.5 5 5.5 6 NJU6043 (V =3.6V, V =0V, L=4.7uH, Ta= OVP Pin Input Current vs. Temperature -40 - Temperature (°C) 80 100 - 9 - ...
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... To prevent over current input caused by ESD, R1 and R2 resistors should be connected with SHDNb and OVP pins respectively. By adding these two resistors, the threshold of OVP will be up 0.5V (R2=10kΩ). - 10 - Preliminary OVP DD SHDNb V SS Supplier/Parts Number New Japan Radio/NJU6043 TDK/VLF3010AT-4R7MR70 ROHM/RB160M-30 Taiyo Yuden/JMK107 BJ475MA Taiyo Yuden/TMK107 BJ105KA Standard Standard Standard /NSCW215T NICHIA V OUT R2* C2 ...