NXP SSL4101 GreenChip III+开关电源解决方案
发布时间：2011-5-23 10:57
发布者：Liming
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NXP公司的SSL4101是第三代 GreenChip III+绿色开关电源(SMPS)控制器,包括PFC控制器和反激控制器,通用电压70 V (AC)到305 V (AC)输入,只需很少数量的外接元件就能构成低成本的LED照明电源,主要用在LED照明以及10W-300W的开关电源.本文介绍了SSL4101主要特性和优势,方框图,典型应用配置图以及SSL4101驱动板指标, 48V/150W SSL4101演示板电路图和材料清单. The GreenChip III+ is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The SSL4101T combines a controller for Power Factor Correction (PFC) and a flyback controller. Its high level of integration allows the design of a cost-effective LED lighting application power supply with a very low number of external components. The special built-in green functions provide high efficiency at all power levels. This applies to quasi-resonant operation at high power levels, quasi-resonant operation with valley skipping, as well as to reduced frequency operation at lower power levels. At low power levels, the PFC switches off to maintain high efficiency. During low power conditions, the flyback controller switches to frequency reduction mode and limits the peak current to 25 % of its maximum value. This will ensure high efficiency at low power and good standby power performance while minimizing audible noise from the transformer. The SSL4101T is a MultiChip Module, (MCM), containing two chips. The proprietary high voltage BCD800 process which makes direct start-up possible from the rectified universal mains voltage in an effective and green way. The second low voltage SiIlicon On Insulator (SIO) is used for accurate, high speed protection functions and control. The SSL4101T enables extremely efficient and reliable LED lighting application power supplies with power requirements from 10 W to 300 W, to be designed easily and with a minimum number of external components. The new SSL4101T allows a typical 150 W LED lighting application power supply(universal input, 48 V (DC) output, TEA1761T on the secondary side for Synchronous Rectification) to achieve the following performances at full load: • 120 V (AC): 92 % efficiency, 0.998 PF, 5.8 % THD, < 190 mW standby power • 277 V (AC): 94 % efficiency, 0.978 PF, 9 % THD, < 350 mW standby power SSL4101主要特性和优势: 1 Distinctive features Integrated PFC and flyback controller. True universal mains supply operation: 70 V (AC) to 305 V (AC). High level of integration, resulting in a very low external component count and a cost-effective design. 2 Green features On-chip start-up current source. 3 PFC green features Valley/zero voltage switching for minimum switching losses (NXP Semiconductors patented). Frequency limitation to reduce switching losses. PFC is switched off when a low load is detected at the flyback output. 4 Flyback green features Valley switching for minimum switching losses (NXP Semiconductors patented). Frequency reduction with fixed minimum peak current at low power operation to maintain high efficiency at low output power levels. 5 Protection features Safe restart mode for system fault conditions. Continuous mode protection by means of demagnetization detection for both converters (NXP Semiconductors patented). UnderVoltage Protection (UVP) (foldback during overload). Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback converter). Open control loop protection for both converters. The open loop protection on the flyback converter is safe restart. IC OverTemperature Protection (OTP). Low and adjustable OverCurrent Protection (OCP) trip level for both converters. General purpose input for latched protection, e.g. to be used for system OverTemperature Protection(OTP). SSL4101应用: The device can be used in all LED lighting applications that require a very efficient, low THD, high PF, true universal input voltage and cost-effective power supply solution between 10 W and 300 W. 
图1. SSL4101方框图 
图2. SSL4101典型配置图 
图3. SSL4101典型应用框图 48V/150W演示板 48 V/150 W demo board using the SSL4101 The board can be connected to a mains voltage between 108 V and 305 V. A different mains voltage range can be selected with minor modifications. The output connected to the LEDs is designed for reinforced isolation from the mains. The demo board is designed to meet UL1950, UL8750 and EN61347 but was not submitted for safety compliance. Touching the reference board during operation must be avoided at all times. An isolated housing for the board and the LED’s is mandatory when used in uncontrolled,non-laboratory environments. Therefore the board must be connected to the mains supply via a galvanic isolated (variable) transformer. SSL4101驱动板指标: 
图4.48V/150W演示板外形图 
图5.48V/150W SSL4101演示板电路图 48V/150W演示板材料清单: 
详情请见: http://www.nxp.com/documents/data_sheet/SSL4101T.pdf 和 http://www.nxp.com/documents/user_manual/UM10469.pdf |
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