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参数资料
| 型号： | MC33129 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | High Performance Current Mode Controllers(高性能电流模式控制器) |
| 中文描述： | 高性能电流模式控制器（高性能电流模式控制器） |
| 文件页数： | 7/16页 |
| 文件大小： | 438K |
| 代理商： | MC33129 |
7
MOTOROLA ANALOG IC DEVICE DATA
PIN FUNCTION DESCRIPTION
Pin
Function
Description
1
Drive Output
This output directly drives the gate of a power MOSFET. Peak currents up to 1.0 A are
sourced and sinked by this pin.
2
Drive Ground
This pin is a separate power ground return that is connected back to the power source. It is
used to reduce the effects of switching transient noise on the control circuitry.
3
Ramp Input
A voltage proportional to the inductor current is connected to this input. The PWM uses this
information to terminate output switch conduction.
4
Sync/Inhibit Input
A rectangular waveform applied to this input will synchronize the Oscillator and limit the
maximum Drive Output duty cycle. A dc voltage within the range of 2.0 V to VCC will inhibit
the controller.
5
RT/CT
The free–running Oscillator frequency and maximum Drive Output duty cycle are
programmed by connecting resistor RT to Vref 2.5 V and capacitor CT to Ground. Operation
to 300 kHz is possible.
6
Vref 2.50 V
This output is derived from Vref 1.25 V. It provides charging current for capacitor CT through
resistor RT.
7
Ground
This pin is the control circuitry ground return and is connected back to the source ground.
8
Vref 1.25 V
Error Amp Noninverting Input
This output furnishes a voltage reference for the Error Amplifier noninverting input.
9
This is the noninverting input of the Error Amplifier. It is normally connected to the 1.25 V
reference.
10
Error Amp Inverting Input
This is the inverting input of the Error Amplifier. It is normally connected to the switching
power supply output through a resistor divider.
11
Feedback/PWM Input
This pin is available for loop compensation. It is connected to the Error Amplifier and
Soft–Start Buffer outputs, and the Pulse Width Modulator input.
12
CSoft–Start
A capacitor CSoft–Start is connected from this pin to Ground for a controlled ramp–up of peak
inductor current during startup.
13
Start/Run Output
This output controls the state of an external bootstrap transistor. During the start mode,
operating bias is supplied by the transistor from Vin. In the run mode, the transistor is
switched off and bias is supplied by an auxiliary power transformer winding.
14
VCC
This pin is the positive supply of the control IC. The controller is functional over a minimum
VCC range of 4.2 V to 12 V.
F
Freescale Semiconductor, Inc.
Go to: www.freescale.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MC33129D | 制造商:Motorola Inc 功能描述: |
| MC33129DR2 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| MC33129EFR2 | 功能描述:IC REG CTRLR FLYBK ISO CM 14SOIC RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,000 系列:- PWM 型:电压模式 输出数:1 频率 - 最大:1.5MHz 占空比:66.7% 电源电压:4.75 V ~ 5.25 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 85°C 封装/外壳:40-VFQFN 裸露焊盘 包装:带卷 (TR) |
| MC33129P | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High Performance Current Mode Controllers |
| MC33143 | 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:DUAL HIGH-SIDE SWITCH |
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