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AN9759

AN9759 is a control IC specific for resonant half-bridge topology. It provides 50% complementary duty cycle signals of the high-sideswitch (HVG) and the low-side switch (LVG). And a fixed dead-time inserted between HVG and LVG transient guarantees soft switching and enabled high-frequency operation. The IC built-in a 600V high-voltage floating structure that drive the high-side switch with the bootstrap approach, an external fast-recovery bootstrap diode between VCC and VBOOT must be added.
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PRODUCT INFORMATION

Feature:

50% duty cycle, variable frequency control of resonant

half-bridge converter

High-accuracy oscillator

Up to 500KHz operating frequency

Two-level OCP : frequency-shift and latched shutdown

Interface with PFC controller

Latched disable input

Burst-mode operation at light load

Input for power-ON/OFF sequencing or brownout

protection

Non-linear soft-start for monotonic output voltage rise

800mA peak current for high-side and

low-side gate drivers

Built-in 600V high-voltage floating high-side gate driver

The external fast-recovery bootstrap diode between

VCC and VBOOT must be added


Application:<2000W

LCD and PDP TV

Desktop PC and Server

Telecom SMPS

Industrial SMPS

AC-DC Adapter, open frame SMPS


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