Datasheet > UC1825DWTR

UC1825DWTR

更新时间： 2024-09-23 23:38:51

品牌	Logo	应用领域
其他 - ETC		模拟IC
页数	文件大小	规格书
8页	521K
描述
Analog IC

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

UC1825DWTR 数据手册

UC1825

UC2825

UC3825

High Speed PWM Controller

FEATURES

DESCRIPTION

•

Compatible with Voltage or Current Mode

Topologies

The UC1825 family of PWM control ICs is optimized for high fre-

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 current-

mode or voltage mode systems with the capability for input voltage

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 out-

put. An under-voltage lockout section with 800mV of hysteresis as-

sures low start up current. During under-voltage lockout, the outputs

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.

Trimmed Bandgap Reference (5.1V 1%)

BLOCK DIAGRAM

UDG-92030-2

3/97

12 3 4 5 6 7 8

中文翻译

下载PDF

与UC1825DWTR相关器件

型号	品牌	获取价格	描述	数据表
UC1825J	TI	获取价格	High Speed PWM Controller
UC1825J883B	TI	获取价格	High Speed PWM Controller
UC1825JQMLV	TI	获取价格	High Speed PWM Controller
UC1825L	TI	获取价格	High Speed PWM Controller
UC1825L883B	TI	获取价格	High Speed PWM Controller
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