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参数资料
| 型号： | LT1683IG#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 1/26页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR PWM CM 20-SSOP |
| 标准包装： | 1,800 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 250kHz |
| 占空比： | 46% |
| 电源电压： | 4 V ~ 20 V |
| 降压： | 无 |
| 升压： | 是 |
| 回扫： | 是 |
| 反相： | 是 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 20-SSOP（0.209"，5.30mm 宽） |
| 包装： | 带卷 (TR) |
LT1683
Slew Rate Controlled
Ultralow Noise Push-Pull DC/DC Controller
Greatly Reduced Conducted and Radiated EMI
Low Switching Harmonic Content
Independent Control of Output Switch Voltage and
Greatly Reduced Need for External Filters
Dual N-Channel MOSFET Drivers
20kHz to 250kHz Oscillator Frequency
Easily Synchronized to External Clock
Regulates Positive and Negative Voltages
Easier Layout Than with Conventional Switchers
Power Supplies for Noise Sensitive Communication
EMI Compliant Offline Power Supplies
Precision Instrumentation Systems
Isolated Supplies for Industrial Automation
Medical Instruments
Data Acquisition Systems
FEATURES
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Current Slew Rates
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n
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n
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APPLICATIONS
n
Equipment
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L , LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
DirectSense is a trademark of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
TYPICAL APPLICATION
Ultralow Noise 48V to 5V DC/DC Converter
DESCRIPTION
The LT ? 1683 is a switching regulator controller designed to
lower conducted and radiated electromagnetic interference
(EMI). Ultralow noise and EMI are achieved by controlling
the voltage and current slew rates of external N-channel
MOSFET switches. Current and voltage slew rates can
be independently set to optimize harmonic content of
the switching waveforms vs efficiency. The LT1683 can
reduce high frequency harmonic power by as much as
40dB with only minor losses in efficiency.
The LT1683 utilizes a dual output (push-pull) current
mode architecture optimized for low noise topologies.
The IC includes gate drivers and all necessary oscillator,
control and protection circuitry. Unique error amp circuitry
can regulate both positive and negative voltages. The oscil-
lator may be synchronized to an external clock for more
accurate placement of switching harmonics.
Protection features include gate drive lockout for low V IN ,
opposite gate lockout, soft-start, output current limit,
short-circuit current limiting, gate drive overvoltage clamp
and input supply undervoltage lockout.
51k
510
0.5W
FZT853
48V
39μF
63V
MIDCOM 31244
1N4148
11V
2N3904
68μF
20V
10μF
20V
17
8.2V
3
MBR0530
MBRS340
22μH
150μF
OS-CON
B
OPTIONAL
22μH
2×100μF
POSCAP
A 5V/2A
5V Output Noise
(Bandwidth = 100MHz)
23.2k
976
1.2nF
25k
16.9k
3.3k
14
5
6
7
8
16
SHDN
V5
SYNC
C T
R T
R VSL
V IN
LT1683
GCL
CAP A
GATE A
CAP B
GATE B
CS
5pF
2
1
5pF
18
19
4 Si9422
10pF
200V
Si9422
MBRS340
10pF
200V
30pF
A
200μV/DIV
B
20mV/DIV
200μV P-P
25k 3.3k
1.5k
0.22μF 22nF
15
12
R CSL
V C
SS
13
GND
11
PGND
FB
NFB
10
20
9
30pF
0.1
7.50k
2.49k
5μs/DIV
1683 TA01a
10nF
1683 TA01
1683fd
1
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1684 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Micropower Ring Tone Generator |
| LT1684CN | 功能描述:IC RING TONE GENERATOR 14-DIP RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684CN#PBF | 功能描述:IC RING TONE GENERATOR 14-DIP RoHS:是 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684CS | 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:否 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
| LT1684CS#PBF | 功能描述:IC RING TONE GENERATOR 14-SOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 电信 系列:- 产品培训模块:Lead (SnPb) Finish for COTS 产品变化通告:Product Discontinuation 06/Feb/2012 标准包装:750 系列:* |
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