ncp1587a ON Semiconductor, ncp1587a Datasheet
ncp1587a
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ncp1587a Summary of contents
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... The NCP1587/A provide gate driver design and an internally set 275 kHz (NCP1587) and 200 kHz (NCP1587A) oscillator. In addition to the 1 A gate drive capability, other efficiency enhancing features of the gate driver include adaptive non−overlap circuitry. The devices also incorporate an externally compensated error amplifier and a capacitor programmable soft− ...
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0 REF COMP/DIS 3 BST FB COMP/DIS TG PHASE BG GND Figure 1. Typical Application Diagram POR UVLO FAULT LATCH FAULT + R PWM - Q ...
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... Rating Thermal Resistance, Junction−to−Ambient Thermal Resistance, Junction−to−Case NCP1587A Operating Junction Temperature Range NCP1587A Operating Ambient Temperature Range Storage Temperature Range Lead Temperature Soldering (10 sec): Reflow (SMD styles only) Pb−Free Moisture Sensitivity Level Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied ...
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... V Under Voltage Lockout UVLO Threshold UVLO Hysteresis Switching Regulator VFB Feedback Voltage, Control Loop in Regulation Oscillator Frequency NCP1587 NCP1587A Ramp−Amplitude Voltage Minimum Duty Cycle Maximum Duty Cycle Error Amplifier (GM) Transconductance Open Loop DC Gain Output Source Current Output Sink Current Input Bias Current Soft− ...
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TYPICAL CHARACTERISTICS 5.0 4.7 4.4 4.1 3.8 3 JUNCTION TEMPERATURE (°C) J Figure 3. I vs. Temperature JUNCTION ...
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... V pin is tied The switching frequency, is internally set OUT to 275 kHz (NCP1587) and 200 kHz (NCP1587A). A high gain operational transconductance error amplifier (OTA) is used. Duty Cycle and Maximum Pulse Width Limits In steady state DC operation, the duty cycle will stabilize at an operating point defined by the ratio of the input to the output voltage ...
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... CC Drivers The NCP1587 and NCP1587A include gate drivers to switch external N−channel MOSFETs. This allows the devices to address high−power as well as low−power conversion requirements. The gate drivers also include adaptive non−overlap circuitry. The non−overlap circuitry increase efficiency, which minimizes power dissipation, by minimizing the body diode conduction time ...
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Input Capacitor Selection The input capacitor has to sustain the ripple current produced during the on time of the upper MOSFET must have a low ESR to minimize the losses. The RMS value of this ripple is: Iin ...
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In contrast, smaller values of inductance increase the regulator’s maximum achievable slew rate and decrease the necessary capacitance, at the expense of higher ripple current. The peak-to-peak ripple current for NCP1587 is given by the following ...
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P = control IC power dissipation measured supply current supply voltage top gate driver losses bottom gate driver losses. BG The upper (switching) MOSFET gate driver ...
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Figure 13. Closed-loop Voltage Loop-gain of the NCP1587 DESIGN EXAMPLE II: Type III Compensation (Oscon Cap. with small ESR; Do not place R Switching Frequency F Output Capacitance R Output Capacitance C Output Inductance L Input Voltage V Output Voltage ...
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After choose R4 value, adjust R4 to get enough phase margin Ù 665 W 2nd pole; Choose C to eliminate the noise 275 KHz ...
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VCC GND 5 3 Figure 15. Demo Board PCB Layout http://onsemi.com 13 ...
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... PANASONIC TAIYO YUDEN 1 AVX 2 PANASONIC PANASONIC TDK 1 ON SEMICONDUCTOR 1 PANASONIC 1 MOLEX 1 PASTERNACK ENTERPRISES 1 PANASONIC SEMICONDUCTOR 2 ON SEMICONDUCTOR 2 ON SEMICONDUCTOR 2 ON SEMICONDUCTOR SEMICONDUCTOR 1 PANASONIC 2 DALE DALE 3 PANASONIC DALE 24 DALE 24 PANASONIC 1 DALE 1 DALE 16 KEYSTONE 1 ON SEMICONDUCTOR ...
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Figure 16. Gate Waveforms 20 A Load Sustaining Figure 18. Start-up Sequence Figure 17. Over Current Protection (12 Trip) Figure ...
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... *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. “ ...