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PFC+ Resonant half-bridge controller
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The HR2000 is a fluorescent lamp ballast controller with PFC function and high voltage half-bridge driver. Only 16pin is used to offer cost effective solutions with minimized external components. The HR2000 can properly drive the two MOSFETs of half-bridge to control fluorescent lamp, ensuring all the features at the same time. The operating frequency is programmable and the sweeping frequency is controlled to limit the preheat current. The preheat time and ignition time can be smartly set up for types of lamps and applications. Sufficient protection functions are provided for different fault modes such as over voltage, over current, over temperature, capacitive mode, end of life (EOL). Preheat driving signal is offered in preheat state to meet low power loss application which usually needs a MOSFET to cut off filament transformer. The PFC part only uses 4 pins to realize PFC function with On-time (Ton) control at boundary conduction mode (BCM). It is suitable for wide input range. Over voltage protection and over current protection are integrated for the PFC part. The HR2000 is available in the 16-pin SOIC16 package.
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- PFC PART Only four pins realize PFC function.
- Ton control.
- Boundary Conduction Mode operation.
- Less peripheral components.
- Over voltage and over current protection. HALF-BRIDGE PART
- 600V bootstrap half-bridge driver.
- Programmable preheat current.
- Programmable preheat time.
- Programmable ignition time.
- Single ignition attempt.
- Over voltage protection.
- Over current protection.
- End-Of-Life protection
- Capacitive mode protection.
- Minimized external components.
- Over temperature protection
The EVHR2000-S-00A is an evaluation board for the HR2000. The HR2000 is a fluorescent lamp ballast controller with PFC function and high voltage half-bridge driver. Only 16pin is used to offer cost effective solutions with minimized external components.
The EVHR2000DS-00A is designed to drive 16W fluorescent lamp. With the simple and sufficient on-time control APFC, the demo board provides 400V DC bus voltage for ballast and clean load for Grid. The power factor is greater than 0.9 in all input voltage range. The over-voltage and over-current protection of PFC stage are integrated to ensure the safety.
The half-bridge ballast controller directly drives two MOSFETs to control the fluorescent lamp. The preheat and ignition time are programmed to proper level to meets the characteristics of fluorescent lamp. The over-voltage, over-current, capacitive-mode, and end-of-life (EOL) protection are all integrated.
The EVHR2000DS-00A meets EN55015 EMI standard. And THD meets IEC61000-3-2 Class C standard.