UC1846

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电流模式 PWM 控制器

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数据表

document-pdfAcrobat UCx846/7 Current Mode PWM Controller 数据表 (Rev. C) (英语) PDF | HTML

UC1846

正在供货

数据表

立即订购

产品详情

Rating

Military

Topology

Boost, Flyback, Forward, Full bridge, Half bridge, Push pull

Vin (max) (V)

40

Control mode

Current

Features

Error amplifier, Multi-topology, Soft start, Synchronization pin

Operating temperature range (°C)

-55 to 125

Duty cycle (max) (%)

50

Rating

Military

Topology

Boost, Flyback, Forward, Full bridge, Half bridge, Push pull

Vin (max) (V)

40

Control mode

Current

Features

Error amplifier, Multi-topology, Soft start, Synchronization pin

Operating temperature range (°C)

-55 to 125

Duty cycle (max) (%)

50

CDIP (J)

16

135.3552 mm² 19.56 x 6.92

LCCC (FK)

20

79.0321 mm² 8.89 x 8.89

Automatic Feedforward Compensation
Programmable Pulse-by-Pulse Current Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular Power
Systems
Differential Current Sense Amplifier with Wide
Common Mode Range
Double-Pulse Suppression
500-mA (Peak) Totem-pole Outputs
±1% Band Gap Reference
Undervoltage Lockout
Soft-Start Capability
Shutdown Terminal
500-kHz Operation

Automatic Feedforward Compensation
Programmable Pulse-by-Pulse Current Limiting
Automatic Symmetry Correction in Push-Pull
Configuration
Enhanced Load Response Characteristics
Parallel Operation Capability for Modular Power
Systems
Differential Current Sense Amplifier with Wide
Common Mode Range
Double-Pulse Suppression
500-mA (Peak) Totem-pole Outputs
±1% Band Gap Reference
Undervoltage Lockout
Soft-Start Capability
Shutdown Terminal
500-kHz Operation

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

The UC1846/7 family of control devices provides all of the necessary features to implement fixed-frequency, current-mode control schemes while maintaining a minimum external parts count. The superior performance of this technique can be measured in improved line regulation, enhanced load response characteristics, and a simpler, easier-to-design control loop. Topological advantages include inherent pulse-by-pulse current limiting capability, automatic symmetry correction for push-pull converters, and the ability to parallel while maintaining equal current sharing. \

Protection circuitry includes built-in undervoltage lockout and programmable current limit, in addition to soft-start capability. A shutdown function is also available, which can initiate either a complete shutdown with automatic restart or latch the supply off.

Other features include fully-latched operation, double-pulse suppression, deadline adjust capability, and a ±1% trimmed band gap reference.

The UC1846 features low outputs in the OFF state, while the UCx847 features high outputs in the OFF state.

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