Offline Controllers | MC34025
概览
MC34025 系列是针对高频操作进行优化的高速、固定频率、双端脉宽调制器控制器。此类器件专门针对离线和 DC-DC 转换器应用而设计，为设计人员提供了一种经济高效的方案，并最大限度减少了外部部件。此类集成电路具有振荡器、温度补偿参考、宽带宽误差放大器、高速电流检测比较器、转向触发器和双高电流图腾柱输出，适用于驱动功率 MOSFET。同时还具有保护功能，包括输入和参考欠电压锁定，每个锁定都具有滞后、逐周期电流限制以及用于单脉冲计量的锁存。此系列的灵活性使其能够针对电流模式或电压模式控制轻松配置。
- 50 ns Propagation Delay to Outputs
- Dual High Current Totem Pole Outputs
- Wide Bandwidth Error Amplifier
- Fully-Latched Logic with Double Pulse Suppression
- Latching PWM for Cycle-By-Cycle Current Limiting
- Soft-Start Control with Latched Overcurrent Reset
- Input Undervoltage Lockout with Hysteresis
- Low Start-Up Current (500 mA Typ)
- Internally Trimmed Reference with Undervoltage Lockout
- 45% Maximum Duty Cycle (Externally Adjustable)
- Precision Trimmed Oscillator
- Voltage or Current Mode Operation to 1.0 MHz
- Functionally Similar to the UC3825 Simplified
- Pb-Free Packages are Available
Buy/Parametrics Table
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Obsolete
Pb
A
H
P
SOIC-16W
3
260
TUBE
47
N
Push-Pull
Current/Voltage Mode
1000
No
Yes
Yes
No
-
30
200 / 200
Price N/A
More Details
Obsolete
Pb
A
H
P
SOIC-16W
3
260
REEL
1000
N
Push-Pull
Current/Voltage Mode
1000
No
Yes
Yes
No
-
30
200 / 200
Price N/A
More Details
Obsolete
Pb
A
H
P
PDIP-16
NA
0
TUBE
25
N
Push-Pull
Current/Voltage Mode
1000
No
Yes
Yes
No
-
30
200 / 200
Price N/A
More Details
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