UC1825L883B

更新时间： 2024-11-03 22:18:27

品牌	Logo	应用领域
德州仪器 - TI		控制器
页数	文件大小	规格书
17页	912K
描述
High Speed PWM Controller

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中文翻译

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数据手册
替代型号

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UC1825L883B 数据手册

application

INFO

UC1825

UC2825

UC3825

available

High Speed PWM Controller

FEATURES

DESCRIPTION

•

Compatible with Voltage or Current Mode The UC1825 family of PWM control ICs is optimized for high fre-

Topologies

quency switched mode power supply applications. Particular care

was given to minimizing propagation delays through the comparators

and logic circuitry while maximizing bandwidth and slew rate of the

error amplifier. This controller is designed for use in either cur-

rent-mode or voltage mode systems with the capability for input volt-

age feed-forward.

•

Practical Operation Switching Frequencies

to 1MHz

•

50ns Propagation Delay to Output

High Current Dual Totem Pole Outputs

(1.5A Peak)

Protection circuitry includes a current limit comparator with a 1V

threshold, a TTL compatible shutdown port, and a soft start pin

which will double as a maximum duty cycle clamp. The logic is fully

latched to provide jitter free operation and prohibit multiple pulses at

an output. An under-voltage lockout section with 800mV of hysteresis

assures low start up current. During under-voltage lockout, the out-

puts are high impedance.

•

Wide Bandwidth Error Amplifier

Fully Latched Logic with Double Pulse

Suppression

•

Pulse-by-Pulse Current Limiting

Soft Start / Max. Duty Cycle Control

Under-Voltage Lockout with Hysteresis

Low Start Up Current (1.1mA)

These devices feature totem pole outputs designed to source and

sink high peak currents from capacitive loads, such as the gate of a

power MOSFET. The on state is designed as a high level.

BLOCK DIAGRAM

UDG-92030-2

SLUS235A - MARCH 1997 - REVISED MARCH 2004

12 3 4 5 6 7...17

中文翻译

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UC1825L883B 替代型号

型号	品牌	替代类型	描述	数据表
UC1825AL	TI	类似代替	High Speed PWM Controller
UC3825N	TI	功能相似	High Speed PWM Controller
UC3825AN	TI	功能相似	High Speed PWM Controller

与UC1825L883B相关器件

型号	品牌	获取价格	描述	数据表
UC1825LQMLV	TI	获取价格	High Speed PWM Controller
UC1825N	ETC	获取价格	Analog IC
UC1825Q	ETC	获取价格	Analog IC
UC1825QTR	ETC	获取价格	Analog IC
UC1825-SP	TI	获取价格	耐辐射 QMLV、30V 输入、1.5A 双路输出 1MHz PWM 控制器
UC1825VTD1	TI	获取价格	RAD-TOLERANT, HIGH-SPEED PWM CONTROLLER
UC1825VTD2	TI	获取价格	RAD-TOLERANT, HIGH-SPEED PWM CONTROLLER
UC1825W883B	TI	获取价格	High Speed PWM Controller
UC1826	TI	获取价格	Secondary Side Average Current Mode Controller
UC1826_08	TI	获取价格	Secondary Side Average Current Mode Controller