参数资料
| 型号： | LT1172MJ8#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/24页 |
| 文件大小： | 0K |
| 描述： | IC REG MULTI CONFIG ADJ 8CERDIP |
| 标准包装： | 50 |
| 类型： | 降压（降压），升压（升压），反相，Cuk，回扫，正向转换器 |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.25 V ~ 40 V |
| 输入电压： | 3 V ~ 40 V |
| PWM 型： | 电流模式 |
| 频率 - 开关： | 100kHz |
| 电流 - 输出： | 1.25A |
| 同步整流器： | 无 |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-CDIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-CERDIP |
LT1170/LT1171/LT1172
OPERATION
With t S = 0.2μs, f S = 150kHz, V C = 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
Synchronizing with Bipolar Transistor
V IN
LT1170
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 V C pin to within 200mV of
ground to ensure synchronizing.
Synchronizing with MOS Transistor
V IN
LT1170
GND
V C
GND
V C
R3
C1
2N2369
C2
39pF
R2
2.2k
R1
3k
FROM 5V
LOGIC
R3
C1
VN2222*
D1
1N4158
R2
2.2k
C2
100pF
D2
1N4158
FROM 5V
LOGIC
TYPICAL APPLICATIONS
1170/1/2 OP01
Flyback Converter
* SILICONIX OR EQUIVALENT
1170/1/2 OP02
L2
OPTIONAL
CLAMP TURN-ON
5μH
FILTER
V SNUB
SPIKE
C4
PRIMARY FLYBACK VOLTAGE = OUT
V IN
20V TO 30V
V IN
D3
25V
1W
D2
MUR110
N* = 1/3
1 N*
D1
+
100μF
C1
2000μF
V OUT
5V
6A
R1
3.74k
V IN
0V
0V
a
c
I
b
d
V OUT + V f
N ? V IN
I PRI
V + Vf
N
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
C4*
100μF
+
LT1170
V SW
0
I PRI /N
PRIMARY CURRENT
FB
SECONDARY CURRENT
GND
V C
R3
1.5k
C2
0.15μF
R2
1.24k
0
0
I PRI
I PRI
LT1170 SWITCH CURRENT
t = PRI
*REQUIRED IF INPUT LEADS ≥ 2"
0
(I )(L L )
V SNUB
SNUBBER DIODE CURRENT
1170/1/2 TA03
117012fg
11
相关PDF资料 |
PDF描述 |
|---|---|
| LT1173CN8-12 | IC REG BUCK BST INV 12V .4A 8DIP |
| LT1175MPQ-5#TRPBF | IC REG LDO -5V .5A DDPAK-5 |
| LT1176CSW#TRPBF | IC REG MULTI CONFIG ADJ 20SOIC |
| LT1182IS#TRPBF | IC SW REG CCFL/LCD CONTRST16SOIC |
| LT1185IT#30PBF | IC REG LDO NEG ADJ 3A TO220-5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1172MK | 制造商:Linear Technology 功能描述: |
| LT1172MK/883 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Current-Mode SMPS Controller |
| LT1172S8 | 制造商:LINER 制造商全称:Linear Technology 功能描述:100kHz, 5A, 2.5A and 1.25A High Efficiency Switching Regulators |
| LT1173 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower DC/DC Converter Adjustable and Fixed 5V, 12V |
| LT1173-12 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower DC/DC Converter Adjustable and Fixed 5V, 12V |
发布紧急采购，3分钟左右您将得到回复。