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UC3845AD1中文资料
UC3845AD1数据手册规格书PDF详情
DESCRIPTION
The UC384xA family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state.
Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC3842A and UC3844A have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC3843A and UC3845A are 8.5 V and 7.9V. The UC3842A and UC3843A can operate to duty cycles approaching 100. A range of the zero to
FEATURES
■ TRIMMED OSCILLATOR DISCHARGE CURRENT
■ CURRENT MODE OPERATION TO 500kHz AUTOMATIC FEED FORWARD COMPENSATION
■ LATCHING PWM FOR CYCLE-BY-CYCLE CURRENT LIMITING
■ INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
■ HIGH CURRENT TOTEM POLE OUTPUT UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
■ LOW START-UP CURRENT (
UC3845AD1产品属性
- 类型
描述
- 型号
UC3845AD1
- 功能描述
电流型 PWM 控制器 RO 511-UC3845BD 9/04
- RoHS
否
- 制造商
Texas Instruments
- 开关频率
27 KHz
- 工作电源电压
6 V to 15 V
- 工作电源电流
1.5 mA
- 输出端数量
1
- 最大工作温度
+ 105 C
- 安装风格
SMD/SMT
- 封装/箱体
TSSOP-14
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
STM |
24+ |
2 |
|||||
STM |
2016+ |
SOP8 |
9000 |
只做原装,假一罚十,公司可开17%增值税发票! |
|||
ST |
24+ |
SOP-8 |
5000 |
只做原装公司现货 |
|||
STM |
25+ |
SOP8 |
2568 |
原装优势!绝对公司现货 |
|||
ST |
24+ |
SOP8 |
90000 |
一级代理商进口原装现货、价格合理 |
|||
ST |
SOP8 |
5000 |
优势库存 |
||||
ST |
24+ |
SOP8 |
20000 |
全新原厂原装,进口正品现货,正规渠道可含税!! |
|||
ST |
22+ |
SOP8 |
6000 |
十年配单,只做原装 |
|||
ST/意法 |
24+ |
NA/ |
21670 |
原厂直销,现货供应,账期支持! |
|||
ST |
2025+ |
SOP8 |
3715 |
全新原厂原装产品、公司现货销售 |
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