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參數(shù)資料
| 型號： | LT1952MPGN#TRPBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, LEAD FREE, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 1/28頁 |
| 文件大?。?/td> | 357K |
| 代理商： | LT1952MPGN#TRPBF |
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LT1952/LT1952-1
1
19521fe
TYPICAL APPLICATION
DESCRIPTION
Single Switch Synchronous
Forward Controller
TheLT1952/LT1952-1arecurrentmodePWMcontrollers
optimizedtocontroltheforwardconvertertopology,using
one primary MOSFET. The LT1952/LT1952-1 provide
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, transformer and rectifier utilization. The devices
include soft-start for controlled exit from shutdown and
undervoltage lockout. A precision 107mV current limit
threshold, independent of duty cycle, combines with soft-
starttoprovidehiccupshort-circuitprotection.TheLT1952
is optimized for micropower bootstrap start-up from high
input voltages. The LT1952-1 allows start-up from lower
input voltages. Programmable slope compensation and
leadingedgeblankingallowoptimizationofloopbandwidth
with a wide range of inductors and MOSFETs. Each device
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/LT1952-1
are available in a small 16-pin SSOP package.
36V to 72V Input, 12V at 20A Semi-Regulated Bus Converter
FEATURES
APPLICATIONS
n
Synchronous Rectifier Control for High Efficiency
n
Programmable Volt-Second Clamp
n
Output Power Levels from 25W to 500W
n
Low Current Start-Up
(LT1952: 460A; VIN On/Off = 14.25V/8.75V)
(LT1952-1: 400A; VIN On/Off = 7.75V/6.5V)
n
True PWM Soft-Start
n
Low Stress Short-Circuit Protection
n
Precision 107mV Current Limit Threshold
n
Adjustable Delay for Synchronous Timing
n
Accurate Shutdown Threshold with Programmable
Hysteresis
n
Programmable Slope Compensation
n
Programmable Leading Edge Blanking
n
Programmable Frequency (100kHz to 500kHz)
n
SynchronizabletoanExternalClockupto1.5fOSC
n
Internal 1.23V Reference
n
2.5V External Reference
n
Current Mode Control
n
Small 16-Pin SSOP Package
n
Telecommunications Power Supplies
n
Industrial and Distributed Power
n
Isolated and Non Isolated DC/DC Converters
VIN
T1
PA0905
SUPPLY FROM BIAS
WINDING OF T1
Si7370
×2
PH4840
×2
L1
PA1494.242
47F
16V
X5R
×2
VOUT
12V
20A
220pF
560
T2
1952 TA01
VREF
COMP
SS_MAXDC
SD_VSEC
FB
SYNC
GND
VIN
OUT
OC
ISENSE
SOUT
LT1952/
LT1952-1
BLANK DELAY
ROSC
0.1F
40k
16V
340k
13k
52.3k
40k
PGND
178k
100k
Si7450
0.005
SYNC
FG
CG
LTC3900
10F
0.1F
12V Bus Converter
VOUT vs VIN
VIN (V)
36
8
V OUT
(V)
10
16
48
60
66
1952 TA01b
14
12
42
54
72
L
, LT, LTC and LTM are registered trademarks and ThinSOT is a trademark of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1956 | 制造商:LINEAR 制造商全稱:LINEAR 功能描述:100V Synchronous Switching Regulator Controller |
| LT1956-5 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:High Voltage, 1.5A, 500kHz Step-Down Switching Regulators |
| LT1956EFE | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LT1956EFE#PBF | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關(guān):2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應(yīng)商設(shè)備封裝:6-SON（1.45x1） 產(chǎn)品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| LT1956EFE#TR | 功能描述:IC REG BUCK ADJ 1.5A 16TSSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關(guān)穩(wěn)壓器 系列:- 設(shè)計資源:Design Support Tool 標(biāo)準(zhǔn)包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關(guān):- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細(xì)型，TSOT-23-5 包裝:剪切帶 (CT) 供應(yīng)商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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