參數(shù)資料
型號： LT1952IGN
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)： 21/24頁
文件大?。?/td> 252K
代理商： LT1952IGN
LT1952
21
1952f
APPLICATIU
48V to Isolated 12V, 20A (No Opto-Coupler)
‘Bus Converter’
The wide programmable range and accuracy of the LT1952
Volt-Second clamp makes the LT1952 an ideal choice for
‘Bus Converter’ applications where the Volt-Second clamp
provides line regulation for the converter output. The 48V
to 12V 20A ‘Bus Converter’ application in Figure16 shows
a semi-regulated isolated output without the need for an
optocoupler, optocoupler driver, reference or feedback
network. Some ‘Bus Converter’ solutions run with a fixed
50% duty cycle resulting in an output variation of 2-to-1
for applications with a 72V to 36V input range. The LT1952
uses an accurate wide programmable range Volt-Second
clamp to initially program and then control power supply
output voltage to typically
±
10% for the same 36V to 72V
input range. Efficiency for the LT1952-based bus con-
verter in Figure 16 achieves a high 94% at 20A (Figure 15).
W
U
U
Figure 16. 36V to 72V Input to 12V at 20A No ‘Optocoupler’ Synchronous ‘Bus Converter’
Figure 15. LT1952-Based Synchronous ‘Bus Converter’ Efficiency
vs Load Current (For Circuit in Figure 16)
LOAD CURRENT (A)
4
E
96.0
95.5
95.0
94.5
94.0
93.5
93.0
10
12
14
8
6
16
18
20
1952 F15
V
IN
= 48V
V
OUT
= 12V
The solution is only slightly larger than 1/4 “brick” size and
uses only ceramic capacitors for high reliability.
LTC3900
8V
BIAS
V
U1
V
U1
220pF
8V
BIAS
3
FG
5
CG
CS
+
V
IN
36V TO 72V
T1
PA0815.002
BAS516
BCX55
V
12V, 20A
10k
10k
10k
C
T
1nF
1
μ
F
R
T
15k
560
L1: PA1494.242 PULSE ENGINEERING
T1: PULSE ENGINEERING
T2: COILCRAFT
C
OUT
33
μ
F, 16V
X5R, TDK
3x
0.1
μ
F
2.2
μ
F, 100V
2x
1nF
BAT760
12V
Si7370
2x
PH4840
2x
18V
T2
Q4470-B
82k
47k
1952 F16
2.4
μ
H
SD_V
SEC
OUT
LT1952
7
14
R
OSC
V
IN
3
15
BLANK
GND
9
8
SS_MAXDC
PGND
5
13
DELAY
12
V
REF
OC
6
11
COMP
I
SENSE
1
10
FB
SOUT
2
16
PH21NQ15
2x
1
GND
6
2
V
CC
SYNC
4
CS
–
7
8
TIMER
370k
9m
1
μ
F
470
39k
13.2k
115k
27k
0.47
μ
F
0.1
μ
F
10k
59k
12V Bus Converter Efficiency
相關(guān)PDF資料
PDF描述
LT1952EGN Single Switch Synchronous Forward Controller
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)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LT1952IGN#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)
LT1952IGN#TR 制造商:Linear Technology 功能描述:Current Mode PWM Controller 16-Pin SSOP N T/R
LT1952IGN#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)
LT1952IGN-1 制造商:Linear Technology 功能描述:Current Mode PWM Controller 16-Pin SSOP N
LT1952IGN-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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