参数资料
型号: L6563STR
厂商: STMICROELECTRONICS
元件分类: 稳压器
英文描述: POWER FACTOR CONTROLLER, PDSO14
封装: ROHS COMPLIANT, SOP-14
文件页数: 26/42页
文件大小: 1230K
代理商: L6563STR
Application information
L6563S
32/42
Doc ID 16116 Rev 3
Figure 44.
Interface circuits that let the L6563S switch on or off a PWM controller
If the chip is provided with a soft-start pin, it is possible to delay the start-up of the dc-dc
stage with respect to that of the PFC stage, which is often desired, as described in
. An underlying assumption in order for that to work properly is that the UVLO
thresholds of the PWM controller are certainly higher than those of the L6563S.
Figure 45.
Interface circuits for power up sequencing when dc-dc has the SS
function
If this is not the case or it is not possible to achieve a start-up delay long enough (because
this prevents the dc-dc stage from starting up correctly) or, simply, the PWM controller is
devoid of soft start, the arrangement of Figure 46 lets the dc-dc converter start-up when the
voltage generated by the PFC stage reaches a preset value. The technique relies on the
UVLO thresholds of the PWM controller.
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L6564DTR 功能描述:功率因数校正 IC Transition Mode PFC 5mA 90uA 1.5% Ref RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel
L6564H 功能描述:功率因数校正 IC High Voltage Startup Trans-Mode PFC 700V RoHS:否 制造商:Fairchild Semiconductor 开关频率:300 KHz 最大功率耗散: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Reel