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| 型号： | MIC9131YM |
| 厂商： | Micrel Inc |
| 文件页数： | 1/19页 |
| 文件大小： | 0K |
| 描述： | IC CTRLR DC-DC PWM HV HS 16-SOIC |
| 标准包装： | 48 |
| 应用： | 控制器，电信 |
| 输入电压： | 9 V ~ 18 V |
| 输出数： | 1 |
| 输出电压： | 4.7 V ~ 5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1086 (CN2011-ZH PDF) |
| 其它名称： | 576-2419 MIC9131YM-ND |
MIC9131
General Description
The MIC9131 is a current-mode PWM controller that ef?ciently
converts –48V telecom voltages to logic levels. The MIC9131
features a high voltage start-up circuit that allows the device to
be connected to input voltages as high as 180V. The high input
voltage capability protects the MIC9131 from line transients
that are common in telecom systems. The start-up circuitry
also saves valuable board space and simpli?es designs by
integrating several external components.
The MIC9131 is capable of high speed operation. Typically
the MIC9131 can control a sub-25ns pulse width on the gate
out pin. Its internal oscillator can operate over 2.5MHz, with
even higher frequencies available through synchronisation.
The high speed operation of the MIC9131 is made safe by
the very fast, 34ns response from current sense to output,
minimizing power dissipation in a fault condition.
The MIC9131 allows for the designs of high ef?ciency power
supplies. It can achieve ef?ciencies over 90% at high output
currents. Its low 1.3mA quiescent current allows high ef?ciency
even at light loads.
The MIC9131 has a maximum duty cycle of 75%. For designs
requiring a maximum duty cycle of 50%, refer to the MIC9130.
The MIC9131 is available in a 16-pin SOP and 16-pin QSOP
package options. The junction temperature range is from
–40°C to +125°C.
MIC9131
High-Voltage, High-Speed Telecom
DC-to-DC Controller
Features
? Input voltages up to 180V
? Internal oscillator capable of > 2.5MHz operation
? Accurate 75% maximum duty cycle
? Synchronisation capability to 6MHz
? Current sense delay of 34ns
? Minimum pulse width of <25ns
? 90% ef?ciency
? 1.3mA quiescent current
? 1μA shutdown current
? Soft-start
? Resistor programmable current sense threshold
? Selectable soft-start retry
? 4Ω sink, 12Ω source output driver
? Programmable under-voltage lockout
? Constant-frequency PWM current-mode control
? 16-pin SOIC and 16-pin QSOP
Applications
? Telecom power supplies
? Line cards
? ISDN network terminators
? Micro- and pico-cell base stations
? Low power (< 100W) dc-dc converters
? DSL line cards
Micrel, Inc.
Typical Application
12V
10?
1N5818
10μF
25V
VIN
36V to 72V
6:1
4:1
VOUT
3.3V @ 20A
1M?
0.1μF
L = 530μH
Si4884DY?
(x2)
1.5μH
B320A
100μF
37.4k?
13
1
2
10
Si4884DY?
(x2)
8.2k?
562k?
10k?
0.1μF
7
6
3
12
8
9
FB
OUT
COMP
MIC9131
RBIAS
SS ISNS
CPWR
VBIAS
OSC SYNC AGND PGND
16
SLOPE
COMPENSATION
14
IRFS3IN20D
0.1?
1W
10nF
4
2.61k?
270pF
5
11
15
OPTO
FEEDBACK
90% Ef?cient Telecommunications Power Supply
Micrel, Inc. ? 2180 Fortune Drive ? San Jose, CA 95131 ? USA ? tel + 1 (408) 944-0800 ? fax + 1 (408) 474-1000 ? http://www.micrel.com
August 2006
1
M9999-080206
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MIC9131YM TR | 功能描述:电流型 PWM 控制器 SO-16 High Vin Telecom DC/DC PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MIC9131YQS | 功能描述:电流型 PWM 控制器 SO-16 High Vin Telecom DC/DC PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MIC9131YQS TR | 功能描述:电流型 PWM 控制器 SO-16 High Vin Telecom DC/DC PWM Control IC (Lead Free) RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| MIC913BM5 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MIC913BM5 TR | 功能描述:IC OPAMP 350MHZ HS LP SOT23-5 RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:2,500 系列:- 放大器类型:通用 电路数:1 输出类型:满摆幅 转换速率:0.11 V/µs 增益带宽积:350kHz -3db带宽:- 电流 - 输入偏压:4nA 电压 - 输入偏移:20µV 电流 - 电源:260µA 电流 - 输出 / 通道:20mA 电压 - 电源，单路/双路(±):2.7 V ~ 36 V，±1.35 V ~ 18 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-SOIC（0.154"，3.90mm 宽） 供应商设备封装:8-SO 包装:带卷 (TR) |
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