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參數(shù)資料
| 型號： | LT1509CN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Power Factor and PWM Controller |
| 中文描述： | 1.5 A POWER FACTOR CONTROLLER WITH POST REGULATOR, 300 kHz SWITCHING FREQ-MAX, PDIP20 |
| 封裝： | 0.300 INCH, PLASTIC, DIP-20 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 348K |
| 代理商： | LT1509CN |
14
LT1509
APPLICATIO
S I
FOR
ATIO
U
An LT1431 reference/amplifier coupled to a low cost
optoisolator closes the loop from secondary side to pri-
mary side. Unity loop frequency is a conservative 3kHz.
Figure 10 shows the output voltage’s response with a 2A
to almost 10A current step. Output voltage is maintained
to within 0.5V during the load step. Efficiency versus
power and line voltage is shown in Figure 11. The PFC
preregulator alone has efficiency numbers between 90%
and 97% over line and load.
A 3-turn secondary added to the 70-turn primary of T1
bootstraps V
CC
to about 15V supplying the chip’s 13mA
requirement as well as about 39mA to cover the gate
current of the three FETs and high side transformer. A
0.15
sense resistor is used to sense input current and
servo to the command created by the outer voltage and
multiplier. Thus the input current follows the input line
W
U
U
voltage, and changes as necessary, in order to maintain
constant bank voltage. The forward converter sees a
voltage input of 382VDC unless the line voltage drops out,
in which case the 470
μ
F main capacitor discharges to
240VDC before the PWM stage is shut down. Compared to
a typical off-line converter, the effective input voltage
range of the forward converter is much smaller, simplify-
ing the design. Additionally, the higher bus voltage pro-
vides greater hold-up times for given capacitor size.
Because the high side transformer effectively delays the
turn-on reverse recovery spike past the end of the built-in
blanking time, an external blanking transistor is needed.
Controlling the output current during an output short
circuit depends on the duty cycle reducing to a small
fraction of steady state. An additional transistor disables
blanking during turn-on and output short circuit.
5A/DIV
0.5V/DIV
Figure 10
Figure 11
V
RMS
90
E
80
85
250
LT1509 F11
75
70
132
180
90
200W/300W
100W
30W
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1509CSW | Octal D-Type Transparent Latches With 3-State Outputs 20-PDIP 0 to 70 |
| LT1509IN | Power Factor and PWM Controller |
| LT1510CGN | Constant-Voltage/ Constant-Current Battery Charger |
| LT1510IGN | Constant-Voltage/ Constant-Current Battery Charger |
| LT1510-5CGN | Constant-Voltage/ Constant-Current Battery Charger |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1509CN#PBF | 功能描述:IC PFC CTRLR AVERAGE CURR 20DIP RoHS:是 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 - 開關(guān):- 電流 - 啟動:- 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 |
| LT1509CSW | 功能描述:IC PFC CTRLR AVERAGE CURR 20SOIC 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 - 開關(guān):- 電流 - 啟動:- 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 |
| LT1509CSW#PBF | 功能描述:IC PFC CTRLR AVERAGE CURR 20SOIC RoHS:是 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 - 開關(guān):- 電流 - 啟動:- 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 |
| LT1509CSW#TR | 功能描述:IC PFC CTRLR AVERAGE CURR 20SOIC 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 - 開關(guān):- 電流 - 啟動:- 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 |
| LT1509CSW#TRPBF | 功能描述:IC PFC CTRLR AVERAGE CURR 20SOIC RoHS:是 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 - 開關(guān):- 電流 - 啟動:- 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 |
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