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參數(shù)資料
| 型號： | LT1950EGN |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Single Switch PWM Controller with Auxiliary Boost Converter |
| 中文描述： | 0.18 A SWITCHING CONTROLLER, 560 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.150 INCH, PLASTIC, SSOP-16 |
| 文件頁數(shù)： | 1/20頁 |
| 文件大?。?/td> | 285K |
| 代理商： | LT1950EGN |
LT1950
1
sn1950 1950fs
I
Wide Input Range: 3V to 25V
I
Programmable Volt-Second Clamp
I
Output Power Levels from 25W to 500W
I
Auxiliary Boost Converter Provides 10V Gate Drive
from V
IN
as Low as 3V
I
Programmable Operating Frequency (100kHz to
500kHz) with One External Resistor
I
Programmable Slope Compensation
I
Programmable Leading Edge Blanking
I
±
2% Internal 1.23V Reference
I
Accurate Shutdown Pin Threshold with
Programmable
Hysteresis
I
60ns Current Sense Delay
I
2.5V Auxiliary Reference Output
I
Synchronizable to an External Clock up to 1.5 f
OSC
I
Current Mode Control
I
Small 16-Pin SSOP Package
APPLICATIU
I
Telecom Power Supplies
I
Automotive Power Supplies
I
Portable Electronic Equipment
I
Isolated and Nonisolated DC/DC Converters
Single Switch PWM
Controller with Auxiliary
Boost Converter
DESCRIPTIOU
, LTC and LT are registered trademarks of Linear Technology Corporation.
SLOPE
V
REF
BOOST
R
OSC
BLANK
SYNC
GND
FB
V
IN
V
IN2
V
SEC
SHDN
GATE
I
SENSE
PGND
COMP
LT1950
1950 TA01a
0.1
μ
F
249k
4.99k
4.7k
0.022
μ
F
1
μ
F
470k
18k
10V
BIAS
100k
V
IN
MBRB20200
47
μ
H
47
μ
F
V
OUT
26V
5A
0.015
Si7450
2.5V
Efficiency vs Load Current
LOAD CURRENT (A)
0.5
E
95
90
85
80
75
70
4.5
1950 TA01b
1.5
2.5
3.5
5.5
V
IN
= 48V
V
IN
= 36V
V
IN
= 72V
36V to 72V DC to 26V/5A (Single Switch) Forward Converter
The LT
1950 is a wide input range, forward, boost, flyback
and SEPIC controller that drives an N-channel power
MOSFET with few external components required.
A resistor programmable duty cycle clamp can be used to
generate a volt-second clamp for forward converter appli-
cations. An internal boost switcher is available for creating
a separate supply for the output gate driver, allowing 10V
gate drive from input voltages as low as 3V. The LT1950’s
operating frequency can be set with an external resistor
over a 100kHz to 500kHz range and a SYNC pin allows the
part to be synchronized to an external clock. Additional
programmability exists for leading edge blanking and
slope compensation.
A fast current sense comparator achieves 60ns current
sense delay and the error amplifier is a true voltage mode
error amplifier, allowing a wide range of compensation
networks. An accurate shutdown pin with programmable
hysteresis is available for undervoltage lockout and shut-
down. The LT1950 is available in a small 16-Pin SSOP
package.
FEATURES
TYPICAL APPLICATIO
U
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LT1950EGN#PBF | 功能描述:IC REG CTRLR 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:- 標準包裝: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) |
| LT1950EGN#TR | 功能描述:IC REG CTRLR PWM CM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝: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) |
| LT1950EGN#TRPBF | 功能描述:IC REG CTRLR 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:- 標準包裝: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) |
| LT1950IGN | 功能描述:IC REG CTRLR PWM CM 16-SSOP RoHS:否 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 標準包裝: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) |
| LT1950IGN#PBF | 功能描述:IC REG CTRLR 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:- 標準包裝:2,000 系列:- PWM 型:電流模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:50% 電源電壓:9 V ~ 10 V 降壓:無 升壓:是 回掃:是 反相:無 倍增器:無 除法器:無 Cuk:無 隔離:無 工作溫度:-40°C ~ 85°C 封裝/外殼:8-TSSOP（0.173"，4.40mm 寬） 包裝:帶卷 (TR) |
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