參數(shù)資料
型號: LT1170CT#PBF06
廠商: LINEAR TECHNOLOGY CORP
元件分類: 穩(wěn)壓器
英文描述: 11 A SWITCHING REGULATOR, 115 kHz SWITCHING FREQ-MAX, PZFM5
封裝: PLASTIC, TO-220, 5 PIN
文件頁數(shù): 2/20頁
文件大?。?/td> 278K
代理商: LT1170CT#PBF06
10
LT1170/LT1171/LT1172
117012ff
Synchronizing with MOS Transistor
Synchronizing with Bipolar Transistor
1170/1/2 OP01
C2
39pF
R1
3k
R2
2.2k
LT1170
GND
VIN
VC
C1
R3
2N2369
FROM 5V
LOGIC
1170/1/2 OP02
D1
1N4158
R2
2.2k
LT1170
GND
VIN
VC
C1
R3
FROM 5V
LOGIC
C2
100pF
D2
1N4158
* SILICONIX OR EQUIVALENT
VN2222*
OPERATIO
U
With tS = 0.2s, fS = 150kHz, VC = 1.5V, and R3 = 2k, offset
voltage shift is
≈3.8mV. This is not particularly bother-
some, but note that high offsets could result if R3 were
reduced to a much lower value. Also, the synchronizing
transistor must sink higher currents with low values of R3,
so larger drives may have to be used. The transistor must
be capable of pulling the VC pin to within 200mV of ground
to ensure synchronizing.
TYPICAL APPLICATIO S
U
Flyback Converter
1170/1/2 TA03
D1
C1
2000
F
C4*
100
F
C2
0.15
F
R1
3.74k
R2
1.24k
VIN
20V TO 30V
R3
1.5k
*REQUIRED IF INPUT LEADS
≥ 2"
LT1170
VIN
VSW
FB
VC
OPTIONAL
FILTER
L2
5
H
C4
100
F
VOUT
5V
6A
VSNUB
CLAMP TURN-ON
SPIKE
PRIMARY FLYBACK VOLTAGE =
LT1170 SWITCH VOLTAGE
AREA “a” = AREA “b” TO MAINTAIN
ZERO DC VOLTS ACROSS PRIMARY
SECONDARY VOLTAGE
AREA “c” = AREA “d” TO MAINTAIN
ZERO DC VOLTS ACROSS SECONDARY
PRIMARY CURRENT
SECONDARY CURRENT
LT1170 SWITCH CURRENT
SNUBBER DIODE CURRENT
VOUT + Vf
N
0V
VIN
a
b
0V
c
d
VOUT + Vf
N VIN
I
IPRI
0
IPRI/N
IPRI
t =
(IPRI)(LL)
VSNUB
0
1
N* = 1/3
N*
D3
25V
1W
D2
MUR110
GND
+
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LT1170HVCQ 功能描述:IC REG MULTI CONFIG ADJ 5A D2PAK 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 標準包裝: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 細型,TSOT-23-5 包裝:剪切帶 (CT) 供應商設(shè)備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT
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LT1170HVCQ#PBF 制造商:Linear Technology 功能描述:IC, SWITCHING REGULATOR, DPAK-5