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參數(shù)資料
| 型號(hào)： | LT1952EGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Switch Synchronous Forward Controller |
| 中文描述： | 1 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 1/24頁 |
| 文件大小： | 252K |
| 代理商： | LT1952EGN |
LT1952
1
1952f
APPLICATIU
TYPICAL APPLICATIO
U
DESCRIPTIO
U
FEATURES
The LT
1952 is a current mode PWM controller optimized
to control the forward converter topology, using one
primary MOSFET. The LT1952 provides synchronous
rectifier control, resulting in extremely high efficiency. A
programmable Volt-Second clamp provides a safeguard
for transformer reset that prevents saturation. This allows
a single MOSFET on the primary side to reliably run at
greater than 50% duty cycle for high MOSFET, trans-
former and rectifier utilization. The LT1952 includes
soft-start for controlled exit from shutdown, overcurrent
conditions and undervoltage lockout. A precision 100mV
current limit threshold, independent of duty cycle, com-
bines with soft-start to provide hiccup short circuit protec-
tion. Micropower start-up allows the LT1952 to be effi-
ciently started from high input voltages. Programmable
slope compensation and leading edge blanking allow
optimization of loop bandwidth with a wide range of
inductors and MOSFETs. The LT1952 can be programmed
over a 100kHz to 500kHz frequency range and the part can
be synchronized to an external clock. The error amplifier
is a true op amp, allowing a wide range of compensation
networks. The LT1952 is available in a small 16-pin SSOP
package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
■
Telecommunications Power Supplies
■
Industrial and Distributed Power
■
Isolated and Non-Isolated DC/DC Converters
■
Synchronous Rectifier Control for High Efficiency
■
Programmable Volt-Second Clamp
■
Output Power Levels from 25W to 500W
■
Low Current Start-Up
■
True PWM Soft-Start
■
Low Stress Short Circuit Protection
■
Precision 100mV Current Limit Threshold
■
Adjustable Delay for Synchronous Timing
■
Accurate Shutdown Threshold with Programmable
Hysteresis
■
Programmable Slope Compensation
■
Programmable Leading Edge Blanking
■
Programmable Frequency (100kHz to 500kHz)
■
Synchronizable to an External Clock up to 1.5 f
OSC
■
Internal 1.23V Reference
■
2.5V External Reference
■
Current Mode Control
■
Small 16-Pin SSOP Package
Single Switch Synchronous
Forward Controller
36V to 72V Input, 12V at 20A Semi-Regulated Bus Converter
V
IN
V
IN
T1
PA0905
SUPPLY FROM BIAS
WINDING OF T1
Si7370
×
2
PH4840
×
2
L1
PA1494.242
47
μ
F
16V
X5R
×
2
V
OUT
12V
20A
220pF
560
T2
1952 TA01
V
REF
COMP
SS_MAXDC
SD_V
SEC
FB
SYNC
GND
V
IN
OUT
OC
I
SENSE
SOUT
LT1952
BLANK DELAY
R
OSC
0.1
μ
F
40k
16V
340k
13k
52.3k
40k
40k
PGND
178k
100k
Si7450
0.005
SYNC
FG
CG
LTC3900
10
μ
F
0.1
μ
F
12V Bus Converter
V
OUT
vs V
IN
V
IN
(V)
36
8
V
O
10
16
48
60
66
1952 TA01b
14
12
42
54
72
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LT1952 | Single Switch Synchronous Forward Controller |
| LT1962-1.5 | 300mA, Low Noise, Micropower LDO Regulators(1.5V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-1.8 | 300mA, Low Noise, Micropower LDO Regulators(1.8V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-2.5 | 300mA, Low Noise, Micropower LDO Regulators(2.5V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
| LT1962-3 | 300mA, Low Noise, Micropower LDO Regulators(3V輸出,300mA, 低噪聲,微功耗,低壓差輸出穩(wěn)壓器) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1952EGN#PBF | 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1952EGN#TR | 制造商:Linear Technology 功能描述:Current Mode PWM Controller 16-Pin SSOP N T/R |
| LT1952EGN#TRPBF | 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標(biāo)準(zhǔn)包裝:2,500 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:500kHz 占空比:96% 電源電壓:4 V ~ 36 V 降壓:無 升壓:是 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 125°C 封裝/外殼:24-WQFN 裸露焊盤 包裝:帶卷 (TR) |
| LT1952EGN-1 | 制造商:Linear Technology 功能描述:Current Mode PWM Controller 16-Pin SSOP N |
| LT1952EGN-1#PBF | 功能描述:IC REG CTRLR ISO PWM CM 16-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無 回掃:無 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR |
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