开关电源测试项目及内容.ppt

Test Waveform Power Good Delay Time电源确认信号(100mS~500mS) Purpose: Measure the sequence relationship between Power Good Signal and specified output voltage. 目的:量测电源确认信号与被指定输出电压之间的时序关系 Environmental Conditions: Temperature 25℃, Relative Humidity 65% 环境条件:温度 25℃ 相对湿度 65% Test Conditions: 1.The input voltage frequency must be under any condition in the range of the product specification 测试条件: 1.输入电压以产品规格之全电压频率范围 2. The output load is full load on all outputs at under the product specification. 2. 输出负载以产品规格之最大额定电流值﹒ 3. Power good delay time is measure the interval between specified output voltage rise to 95% and other is power good signal rise to 100% 3. 量测当被指定电压上升至95%,而电源确认信号上升至100%时，两者间之时间差为 电源确认信号延迟时间.(Power Good Delay Time) 4. Power good fail time is measure the interval between power good signal off to specified output voltage falling to 95% . 4. 量测当电源确认信号电压消失，被指定电压下降至95%时，两者间之时间差为 电源确认信号消失时间.(Power Good Fail Time) Full Load =180W: +5V/9A、+12V/9A、-12V/0.3A、+3.3V/5A、+5Vsb/1.5A. Result limit: The result must meet the requirements of product specification. 结果判定:必须符合产品规格书要求. PG Delay Time PF Delay Time Hold-up Time关机保持时间 Purpose: When the power loss its input power, Measure the power supply should maintain output in regulation limit time. 目 的:量测输入电源关断后，电源指定输出电压继续维持输出的持续时间. Test Conditions: 1.The input voltage frequency must be under any condition in the range of the product specification. 测试条件: 1.输入电压以产品规格之全额定电压频率范围 2. The output load is full load on all outputs at under the product specification. 2. 输出负载以产品规格之最大额定电流值﹒ 3. When the power loss its input power, output voltage is reduced to regulation low line(+5V reduced to+4.75V). 3. 交流输入关断后,指定输出电压下降至规格下限(+5V为降至4.75V时之时间) 4. Do the test in cold start one time, so do in hot start one time. 4. 冷机和热机各做一次. Result limit: The Hold-up Time can’t be less than the specified ( T-holdup≧ 16mS ). 结果判定: 关机延迟时间不能小于产品规格 Test Waveform Over Voltage Protection输出过电