參數(shù)資料
型號(hào)： LT1508CS
廠商： LINEAR TECHNOLOGY CORP
元件分類： 穩(wěn)壓器
英文描述： 1.5 A POWER FACTOR CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO20
封裝： PLASTIC, SO-20
文件頁(yè)數(shù)： 1/16頁(yè)
文件大?。?/td> 232K
代理商： LT1508CS
1
LT1508
Power Factor and PWM
Controller (Voltage Mode)
, LTC and LT are registered trademarks of Linear Technology Corporation.
s
PFC and PWM Single Chip Solution
s
Synchronized Operation up to 300kHz
s
99% Power Factor Over 20:1 Load Current Range
s
Voltage Mode PWM
s
Instantaneous Overvoltage Protection
s
Dedicated Overvoltage Protection (OVP Pin)
s
Minimal Line Current Dead Zone
s
Typical 250
A Start-Up Supply Current
s
Line Switching Noise Filter
s
Low Quiescent Current: 13mA
s
Fast 1.5A Peak Current Gate Drivers
s
Separate Soft Start Control
FEATURES
DESCRIPTION
U
APPLICATIONS
U
s
Universal Power Factor Corrected Power Supplies
and Preregulators
The LT
1508 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 voltage mode PWM section (LT1509 is the current
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 the
PFC output reaches the preset voltage. In the event of brief
line loss, PWM will be shut off when the PFC output
voltage drops below 73% of the preset value.
–
+
–
+
–
11
16
13
+
–
+
–
+
IM =
IA2IB
200
A2
4
15
19
18
1508 BD
VSENSE
7.5V
7.9V
VCC
16V TO 10V
14
A
14
A
7
A
7V TO
4.7V
–
+
EA
CA
–
+
CL
2.2V
M1
IA
IM
IB
25k
1V
R
2R
14
VAOUT
10
VREF
7.5V
VREF
12
MOUT
8
ISENSE
7
CAOUT
6
CSET
RSET
ILIM
VC
50
A
RUN
R
Q
S
RQ
R
OSC
55%
DELAY
200ns
BLANKING
PKLIM
5
GND1
3
VCC
17
GTDR1
16V
1
GND2
2
GTDR2
20
IAC
9
OVP
SS1
SS2
PWMOK
0.7V
+
–
+
–
NOTE: PWM PULSE IS DELAYED BY 55% DUTY CYCLE
AFTER PFC PULSE
–
+
–
+
BLOCK DIAGRAM
W
NOT RECOMMENDED FOR NEW DESIGNS
Contact Linear Technology for Potential Replacement
相關(guān)PDF資料
PDF描述
LT1508IS 1.5 A POWER FACTOR CONTROLLER, 300 kHz SWITCHING FREQ-MAX, PDSO20
LT1620CMS8#TR SPECIALTY ANALOG CIRCUIT, PDSO8
LT1621IGN#TR SPECIALTY ANALOG CIRCUIT, PDSO16
LT1620CS8#TR SPECIALTY ANALOG CIRCUIT, PDSO8
LT1620IGN#TR SPECIALTY ANALOG CIRCUIT, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1508CSW 功能描述:IC PWM/POWER FACTOR CNTRLR20SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - PFC（功率因數(shù)修正） 系列:- 產(chǎn)品培訓(xùn)模塊:GreenChip Synchronous Rectification Control Family of ICs 標(biāo)準(zhǔn)包裝:1 系列:- 模式:間歇導(dǎo)電（DCM） 頻率 - 開(kāi)關(guān):- 電流 - 啟動(dòng):- 電源電壓:8.6 V ~ 38 V 工作溫度:-20°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:Digi-Reel® 其它名稱:568-5348-6
LT1508I 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Factor and PWM Controller(Voltage Mode)
LT1508IN 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Factor and PWM Controller(Voltage Mode)
LT1508ISW 功能描述:IC PWM/POWER FACTOR CNTRLR20SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - PFC（功率因數(shù)修正） 系列:- 產(chǎn)品培訓(xùn)模塊:GreenChip Synchronous Rectification Control Family of ICs 標(biāo)準(zhǔn)包裝:1 系列:- 模式:間歇導(dǎo)電（DCM） 頻率 - 開(kāi)關(guān):- 電流 - 啟動(dòng):- 電源電壓:8.6 V ~ 38 V 工作溫度:-20°C ~ 150°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應(yīng)商設(shè)備封裝:14-SO 包裝:Digi-Reel® 其它名稱:568-5348-6
LT1509 制造商:LINER 制造商全稱:Linear Technology 功能描述:Power Factor and PWM Controller
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