LT1509 - Power Factor and PWM Controller

LT1509 - Power Factor and PWM Controller - Linear Technology（凌力尔特）

The LT1509 is a complete solution for universal off-line switching power supplies utilizing active power factor correction. The PFC section is identical to the LT1248 PFC controller except the EN/SYNC pin is removed because PFC and PWM are synchronized internally. The current mode PWM section (the LT1508 is the volt-age-mode counterpart) contains all the primary side functions to convert the PFC preregulated high voltage output to an isolated low voltage output. The PWM duty cycle is internally limited to 47% (maximum 50%) to prevent transformer saturation. PWM soft start begins when PFC output reaches the preset voltage. In the event of brief line loss,the PWM will be shut off when the PFC output voltage drops below 73% of the preset value.

PFC and PWM Single Chip Solution

Synchronized Operation up to 300kHz

99% Power Factor over 20:1 Load Current Range

Current Mode PWM

Instantaneous Overvoltage Protection

Dedicated Overvoltage Protection (OVP Pin)

Minimal Line Current Dead Zone

Typical 250µA Start-Up Supply Current

Line Switching Noise Filter

Low Quiescent Current: 13mA

Fast 2A Peak Current Gate Drivers

Separate Soft Start Controls

Universal Power Factor Corrected Power Supplies and Preregulators

器件型号	封装	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量)
LT1509CN	N-20	C	$5.25	$3.95
LT1509CN#PBF	N-20	C	$5.25	$3.95
LT1509CSW	SW-20	C	$5.25	$3.95
LT1509CSW#PBF	SW-20	C	$5.25	$3.95
LT1509CSW#TR	SW-20	C		$4.05
LT1509CSW#TRPBF	SW-20	C		$4.05
LT1509IN	N-20	I	$5.85	$4.35
LT1509IN#PBF	N-20	I	$5.85	$4.35
LT1509ISW	SW-20	I	$5.85	$4.35
LT1509ISW#PBF	SW-20	I	$5.85	$4.35
LT1509ISW#TR	SW-20	I		$4.45
LT1509ISW#TRPBF	SW-20	I		$4.45

LT1248 - Power Factor Controller

LT1249 - 功率因数控制器

LT3798 - 具备有源 PFC 功能的隔离型 No Opto 耦合器反激式控制器

LT4320 / LT4320-1 - 理想二极管桥控制器

LT3799 - 具备有源 PFC 功能的离线隔离型反激式 LED 驱动器

LT3796 - 具双电流检测的 100V 恒定电流和恒定电压控制器

LT3799-1 - 具备有源 PFC 功能的离线隔离型反激式 LED 控制器

LT8705 - 80V V_IN 和 V_OUT 同步、四开关、降压-升压型 DC/DC 控制器

LT4363 - 具电流限制功能的高电压浪涌抑制器

LT3080 - 可调 1.1A、单电阻、低压差稳压器

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