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High-Performance Digital PFC + Analog LLC Combo Controller with Standby Power Input to VCC
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The HR1204 is a high-performance controller that integrates an advanced, digital, PFC controller and a half-bridge, LLC resonant controller. The HR1204 requires low input power at no-load or ultra-light load, making it compliant with the Energy Using Product Directive (EuP) Lot 6 and Code of Conduct Version 5 Tier 2 specifications.
The PFC of the HR1204 employs a patented average current control scheme, which can operate both in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the instantaneous condition of the input voltage and output load. The IC exhibits excellent efficiency and high power factor (PF) at light load. The performance of the PFC can be optimized by programming multiple parameters through an I2C GUI. Programming can be completed either by the factory or by the customer referring to a detailed user guide.
The half-bridge LLC resonant converter achieves high efficiency with zero-voltage switching (ZVS). The HR1204 implements an adaptive dead-time adjustment (ADTA) function to guarantee ZVS in different load conditions. Additionally, the HR1204 can prevent the LLC converter from operating in capacitive mode, making it more robust and easier to design.
In order to improve the noise immunity, HR1204 implements multiple programmable digital filters on critical signals.
Full protection features include thermal shutdown, open-loop protection (OLP), over-current protection (OCP), over-voltage protection (OVP), and brown-in/-out protection.
The HR1204 is suitable for standby power applications and is available in TSSOP28 and SOIC-28 packages.
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Features & Benefits
General System Features
- Meets EuP Lot 6 and CoC Version 5 Tier 2 Specifications
- Standard I2C Interface
- 1k EEPROM to Store Parameters
- User-Friendly GUI for Digital PFC
- VCC Supplied by External DC Input from Additional Isolated Power Source
- High Efficiency from Light Load to Full Load by CCM/DCM Multi-Mode Control
- High PF Due to Patented Input Capacitor Current Compensation
- Programmable Filter for Noise Suppression
- Programmable Frequency Jittering
- Programmable Brown-In and Brown-Out
- Programmable Soft Start
- Cycle-by-Cycle Current Limit
- Open-Loop Protection
- 600V High-Side Gate Driver with Integrated Bootstrap Diode and High dV/dt Immunity
- Adaptive Dead-Time Adjustment of HB LLC with Minimum and Maximum Limit
- Burst Mode Switching
- Safe Start-Up in Case of System Fault
- Two-Level Over-Current Protection (OCP)
- Latch Shutdown Protection
- Over-Temperature Protection (OTP)
- Capacitive Mode Protection
EVHR1204-S-00A Evaluation Kit 400W Battery Charger for Power Tools Evaluation Board
The EVHR1204-S-00A is a 21V/18A 400W Battery charger for power tools.
This reference design is a complete battery charger design for cordless power tool, which is widely used in drilling, grinding, cutting, polishing, and various garden tools. The design can be used in Li-ion and Li-poly chemistry battery with a voltage range from 10V to 21V. The maximum current can support up to 18A. The charger provides constant voltage and constant current control with programmable voltage and current.
The HR1204 integrates a digital PFC controller and a half-bridge resonant controller into a single chip. It uses very low power at no load or ultra-light load.
The PFC of the HR1204 employs a patented average current control scheme, which can operate in continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the instantaneous condition of the input voltage and output load.
The half-bridge LLC converter achieves high efficiency with zero-voltage switching (ZVS). The HR1204 implements an adaptive dead-time adjustment (ADTA) function so the LLC converter can easily achieve ZVS from heavy load to light load. Additionally, the HR1204 can prevent the LLC converter from operating in capacitive mode, making it more robust and easier to design.
The EVHR1204-S-00A has excellent efficiency and a high power factor for the entire load range. Full protection features include overload protection; short-circuit protection (SCP), over-voltage protection (OVP), and anti-capacitive mode protection. The EVHR1204-S-00A also meets the Class C standard of IEC61000-3-2 and EN55022 standard.