英飞凌汽车HID前灯镇流器及PFC控制解决方案主要由5个MOSFET、2个高电压驱动器、1个PFC控制器和1个HID灯镇流器控制器构成,具体电路如下图所示。
英飞凌汽车HID前灯镇流器及PFC控制方案电路示意图。
MOSFET可选择英飞凌的N沟道MOSFET(500V或600V的CoolMOS C3/CoolMOS CP),
PFC控制器可选择英飞凌的DCM PFC-IC(TDA4863-2)或CCM PFC-IC(ICE1PCS01/02)。
有源功率因子控制器TDA4863-2是英飞凌针对开关电源(SMPS)最新推出的PFC-DCM(非连续传导模式)控制IC,前两代产品分别是TDA4862和TDA4863。它们主要优化用于为电子镇流器和离线SMPS提供非常紧凑和高性价比的PFC解决方案,完全与世界标准相兼容。通过使用一个针对非连续工作模式的零电流检测器,它们允许实现一个接近1的功率因子和杰出的THD。
TDA4862、TDA4863和TDA4863-2的主要特性包括:1)功率因子接近1;2)像有源谐波滤波器一样控制升压转换器,以得到更低的THD;3)低电流启动;4)针对非连续工作模式的零电流检测器;5)输出过压保护;6)输出欠压锁定;7)内部启动定时器;8)带主动关断功能的图腾极输出;9)内部边沿消隐LEB;10)正弦电流消耗。
与TD4862相比,TDA4863和TDA4863-2的改进为:1)非常低启动电流;2)非常低比较器和乘法器失调;3)针对由MOSFET开关引起的低失真干扰的高复杂度放大器;4)更精确的过压阈值;5)更高的栅极驱动能力(仅适用TD4863-2)。
有源功率因子控制器ICE1PCS01/02是英飞凌针对有源CCM(连续传导模式)功率因子校正转换器而推出的8脚控制IC,The unique average current control allows for low THD at all load ranges and excellent compensation of line voltage varations. The soft-start and the open-loop-protection provide high reliability and optimum operating conditions for SIC(silicon carbide) diodes. ICE2PCS01/02 are the 2nd generation of Continuous Conduction Mode (CCM) PFC controllers, which employ BiCMOS technology.
Compared to the first generation of ICE1PCS01/02, the new ICs have lower internal reference trimmed at 3V. They also have other advantages such as wider Vcc operating range, improved internal oscillator and additional direct bulk capacitor over-voltage protection.
Major Features include:
1. Ease of use with few external components
2. Average current control
3. External current and voltage loop compensation for greater user fexibility
4. Programmable switching (50-250kHz) for ICE1PCS01/ICE2PCS01
5. Trimmed internal fixed switching frequency for ICE1PCS02/ICE2PCS02(65kHz+5% at 25oC)
6. Direct sensing, input brown-out detection with hysteresis for ICE1PCS02/ICE2PCS02
7. Max. duty cycle of 95% (typ)
8. Trimmed internal reference voltage (5V+2%) for ICE1PCS01/02
9. Vcc under-voltage lock-out
10. Cycle by cycle peak current limit.
11. Output over-voltage protection
12. Open loop detection
13. Output under-voltage detection
14. Enhanced dynamic response
15. Soft overcurrent protection
16. Fulfills class D spec. of IEC1000-3-2
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