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Description
Highly Integrated Quasi-Resonant Current Mode PWM Controller
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Features
● High-Voltage Startup
● Quasi-Resonant Operation
● Cycle-by-Cycle Current Limiting
● Peak-Current-Mode Control
● Leading-Edge Blanking (LEB)
● Internal Minimum tOFF
● Internal 5ms Soft-Start
● Over Power Compensation
● GATE Output Maximum Voltage
● Auto-Recovery Over-Current Protection(FB Pin)
● Auto-Recovery Open-Loop Protection(FB Pin)
● VDD Pin and Output Voltage (DET Pin) OVP Latched
● Low Frequency Operation (below 100kHz) for FAN6300A
● High Frequency Operation (up to 190kHz) for FAN6300H
Applications
● AC/DC NB Adapters
● Open-Frame SMPS
Description
The highly integrated FAN6300A/H of PWM controller provides several features to enhance the performance of flyback converters. FAN6300A is applied on quasi-resonant flyback converters where maximum operating frequency is below 100kHz. FAN6300H is suitable for high-frequency operation (up to 190kHz). A built-in HV startup circuit can provide more startup current to reduce the startup time of the controller. Once the VDD voltage exceeds the turn-on threshold voltage, the HV startup function is disabled immediately to reduce power consumption. An internal valley voltage detector ensures power system operates at quasi-resonant operation over a wide-range of line voltage and any load conditions,as well as reducing switching loss to minimize switching voltage on drain of power MOSFET.
To minimize standby power consumption and light-load efficiency,a proprietary green-mode function provides off-time modulation to decrease switching frequency and perform extended valley voltage switching to keep to a minimum switching voltage. The operating frequency is limited by minimum to foff time, which is 38usto 8μs in FAN6300A and 13μs to 3μs in FAN6300H, so FAN6300H can operate at higher switching frequency than FAN6300A.
FAN6300A/H controller also provides many protection functions. Pulse-by-pulse current limiting ensures the fixed-peak current limit level, even when a short circuit occurs. Once an open-circuit failure occurs in the feedback loop,the internal protection circuit disables PWM output immediately. As long as VDD drops below the turn-off threshold voltage,the controller also disables PWM output. The gate output is clamped at 18V to protect the power MOS from high gate-source voltage conditions. The minimum tOFF time limit prevents the system frequency from being too high. If the DET pin triggers OVP, internal OTP is triggered and the power system enters latch-mode until AC power is removed.
The FAN6300A/H controller is available in the 8-pin Small Outline Package (SOP) and the Dual Inline Package(DIP).
Preview of the first 3 pages of the data sheet
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Nermin Osmic
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08/20/2016
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All UTSOURCE purchases have a 60 days money back return policy, plus a 90 days UTSOURCE warranty against any manufacturing defects.This warranty shall not apply to any item where defects have been caused by improper customer assembly, failure by customer to follow instructions, product modification, negligent or improper operation.
FAN6300AMY
FAN6300AMY has several brands around the world that may have alternate names for FAN6300AMY due to regional differences or acquisition. FAN6300AMY may also be known as the following names:
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