汽車HID前燈鎮(zhèn)流器及PFC控制解決方案

英飛凌汽車HID前燈鎮(zhèn)流器及PFC控制解決方案主要由5個MOSFET、2個高電壓驅(qū)動器、1個PFC控制器和1個HID燈鎮(zhèn)流器控制器構(gòu)成，具體電路如下圖所示。

英飛凌汽車HID前燈鎮(zhèn)流器及PFC控制方案電路示意圖。

MOSFET可選擇英飛凌的N溝道MOSFET（500V或600V的CoolMOS C3/CoolMOS CP），

PFC控制器可選擇英飛凌的DCM PFC-IC（TDA4863-2）或CCM PFC-IC（ICE1PCS01/02）。

有源功率因子控制器TDA4863-2是英飛凌針對開關電源（SMPS）最新推出的PFC-DCM（非連續(xù)傳導模式）控制IC，前兩代產(chǎn)品分別是TDA4862和TDA4863。它們主要優(yōu)化用于為電子鎮(zhèn)流器和離線SMPS提供非常緊湊和高性價比的PFC解決方案，完全與世界標準相兼容。通過使用一個針對非連續(xù)工作模式的零電流檢測器，它們允許實現(xiàn)一個接近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）像有源諧波濾波器一樣控制升壓轉(zhuǎn)換器，以得到更低的THD；3）低電流啟動；4）針對非連續(xù)工作模式的零電流檢測器；5）輸出過壓保護；6）輸出欠壓鎖定；7）內(nèi)部啟動定時器；8）帶主動關斷功能的圖騰極輸出；9）內(nèi)部邊沿消隱LEB；10）正弦電流消耗。

與TD4862相比，TDA4863和TDA4863-2的改進為：1）非常低啟動電流；2）非常低比較器和乘法器失調(diào)；3）針對由MOSFET開關引起的低失真干擾的高復雜度放大器；4）更精確的過壓閾值；5）更高的柵極驅(qū)動能力（僅適用TD4863-2）。

有源功率因子控制器ICE1PCS01/02是英飛凌針對有源CCM（連續(xù)傳導模式）功率因子校正轉(zhuǎn)換器而推出的8腳控制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